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Contract Name:
WeightedRateCollectionPool
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 400 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "../Pool.sol"; import "../rates/WeightedInterestRateModel.sol"; import "../filters/CollectionCollateralFilter.sol"; import "../tokenization/ERC20DepositToken.sol"; import "../oracle/ExternalPriceOracle.sol"; /** * @title Pool Configuration with a Weighted Interest Rate Model and Collection * Collateral Filter * @author MetaStreet Labs */ contract WeightedRateCollectionPool is Pool, WeightedInterestRateModel, CollectionCollateralFilter, ERC20DepositToken, ExternalPriceOracle { /**************************************************************************/ /* Constructor */ /**************************************************************************/ /** * @notice Pool constructor * @param collateralLiquidator Collateral liquidator * @param delegateRegistryV1 Delegation registry v1 contract * @param delegateRegistryV2 Delegation registry v2 contract * @param erc20DepositTokenImplementation ERC20 Deposit Token implementation address * @param collateralWrappers Collateral wrappers */ constructor( address collateralLiquidator, address delegateRegistryV1, address delegateRegistryV2, address erc20DepositTokenImplementation, address[] memory collateralWrappers ) Pool(collateralLiquidator, delegateRegistryV1, delegateRegistryV2, collateralWrappers) WeightedInterestRateModel() ERC20DepositToken(erc20DepositTokenImplementation) ExternalPriceOracle() { /* Disable initialization of implementation contract */ _storage.currencyToken = IERC20(address(1)); } /**************************************************************************/ /* Initializer */ /**************************************************************************/ /** * @notice Initializer * @dev Fee-on-transfer currency tokens are not supported * @param params ABI-encoded parameters */ function initialize(bytes memory params) external { require(address(_storage.currencyToken) == address(0), "Already initialized"); /* Decode parameters */ ( address[] memory collateralTokens_, address currencyToken_, address priceOracle_, uint64[] memory durations_, uint64[] memory rates_ ) = abi.decode(params, (address[], address, address, uint64[], uint64[])); /* Initialize Collateral Filter */ CollectionCollateralFilter._initialize(collateralTokens_); /* Initialize External Price Oracle */ ExternalPriceOracle.__initialize(priceOracle_); /* Initialize Pool */ Pool._initialize(currencyToken_, durations_, rates_); } /**************************************************************************/ /* Name */ /**************************************************************************/ /** * @inheritdoc Pool */ function IMPLEMENTATION_NAME() external pure override returns (string memory) { return "WeightedRateCollectionPool"; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../token/ERC20/extensions/IERC20Metadata.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../token/ERC721/extensions/IERC721Metadata.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol) pragma solidity ^0.8.0; /** * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to * be specified by overriding the virtual {_implementation} function. * * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a * different contract through the {_delegate} function. * * The success and return data of the delegated call will be returned back to the caller of the proxy. */ abstract contract Proxy { /** * @dev Delegates the current call to `implementation`. * * This function does not return to its internal call site, it will return directly to the external caller. */ function _delegate(address implementation) internal virtual { assembly { // Copy msg.data. We take full control of memory in this inline assembly // block because it will not return to Solidity code. We overwrite the // Solidity scratch pad at memory position 0. calldatacopy(0, 0, calldatasize()) // Call the implementation. // out and outsize are 0 because we don't know the size yet. let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0) // Copy the returned data. returndatacopy(0, 0, returndatasize()) switch result // delegatecall returns 0 on error. case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } /** * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function * and {_fallback} should delegate. */ function _implementation() internal view virtual returns (address); /** * @dev Delegates the current call to the address returned by `_implementation()`. * * This function does not return to its internal call site, it will return directly to the external caller. */ function _fallback() internal virtual { _beforeFallback(); _delegate(_implementation()); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other * function in the contract matches the call data. */ fallback() external payable virtual { _fallback(); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data * is empty. */ receive() external payable virtual { _fallback(); } /** * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback` * call, or as part of the Solidity `fallback` or `receive` functions. * * If overridden should call `super._beforeFallback()`. */ function _beforeFallback() internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Create2.sol) pragma solidity ^0.8.0; /** * @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer. * `CREATE2` can be used to compute in advance the address where a smart * contract will be deployed, which allows for interesting new mechanisms known * as 'counterfactual interactions'. * * See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more * information. */ library Create2 { /** * @dev Deploys a contract using `CREATE2`. The address where the contract * will be deployed can be known in advance via {computeAddress}. * * The bytecode for a contract can be obtained from Solidity with * `type(contractName).creationCode`. * * Requirements: * * - `bytecode` must not be empty. * - `salt` must have not been used for `bytecode` already. * - the factory must have a balance of at least `amount`. * - if `amount` is non-zero, `bytecode` must have a `payable` constructor. */ function deploy(uint256 amount, bytes32 salt, bytes memory bytecode) internal returns (address addr) { require(address(this).balance >= amount, "Create2: insufficient balance"); require(bytecode.length != 0, "Create2: bytecode length is zero"); /// @solidity memory-safe-assembly assembly { addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt) } require(addr != address(0), "Create2: Failed on deploy"); } /** * @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the * `bytecodeHash` or `salt` will result in a new destination address. */ function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) { return computeAddress(salt, bytecodeHash, address(this)); } /** * @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at * `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}. */ function computeAddress(bytes32 salt, bytes32 bytecodeHash, address deployer) internal pure returns (address addr) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) // Get free memory pointer // | | ↓ ptr ... ↓ ptr + 0x0B (start) ... ↓ ptr + 0x20 ... ↓ ptr + 0x40 ... | // |-------------------|---------------------------------------------------------------------------| // | bytecodeHash | CCCCCCCCCCCCC...CC | // | salt | BBBBBBBBBBBBB...BB | // | deployer | 000000...0000AAAAAAAAAAAAAAAAAAA...AA | // | 0xFF | FF | // |-------------------|---------------------------------------------------------------------------| // | memory | 000000...00FFAAAAAAAAAAAAAAAAAAA...AABBBBBBBBBBBBB...BBCCCCCCCCCCCCC...CC | // | keccak(start, 85) | ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ | mstore(add(ptr, 0x40), bytecodeHash) mstore(add(ptr, 0x20), salt) mstore(ptr, deployer) // Right-aligned with 12 preceding garbage bytes let start := add(ptr, 0x0b) // The hashed data starts at the final garbage byte which we will set to 0xff mstore8(start, 0xff) addr := keccak256(start, 85) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol) // This file was procedurally generated from scripts/generate/templates/SafeCast.js. pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint248 from uint256, reverting on * overflow (when the input is greater than largest uint248). * * Counterpart to Solidity's `uint248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toUint248(uint256 value) internal pure returns (uint248) { require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits"); return uint248(value); } /** * @dev Returns the downcasted uint240 from uint256, reverting on * overflow (when the input is greater than largest uint240). * * Counterpart to Solidity's `uint240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toUint240(uint256 value) internal pure returns (uint240) { require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits"); return uint240(value); } /** * @dev Returns the downcasted uint232 from uint256, reverting on * overflow (when the input is greater than largest uint232). * * Counterpart to Solidity's `uint232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toUint232(uint256 value) internal pure returns (uint232) { require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits"); return uint232(value); } /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.2._ */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint216 from uint256, reverting on * overflow (when the input is greater than largest uint216). * * Counterpart to Solidity's `uint216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toUint216(uint256 value) internal pure returns (uint216) { require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits"); return uint216(value); } /** * @dev Returns the downcasted uint208 from uint256, reverting on * overflow (when the input is greater than largest uint208). * * Counterpart to Solidity's `uint208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toUint208(uint256 value) internal pure returns (uint208) { require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits"); return uint208(value); } /** * @dev Returns the downcasted uint200 from uint256, reverting on * overflow (when the input is greater than largest uint200). * * Counterpart to Solidity's `uint200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toUint200(uint256 value) internal pure returns (uint200) { require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits"); return uint200(value); } /** * @dev Returns the downcasted uint192 from uint256, reverting on * overflow (when the input is greater than largest uint192). * * Counterpart to Solidity's `uint192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toUint192(uint256 value) internal pure returns (uint192) { require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits"); return uint192(value); } /** * @dev Returns the downcasted uint184 from uint256, reverting on * overflow (when the input is greater than largest uint184). * * Counterpart to Solidity's `uint184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toUint184(uint256 value) internal pure returns (uint184) { require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits"); return uint184(value); } /** * @dev Returns the downcasted uint176 from uint256, reverting on * overflow (when the input is greater than largest uint176). * * Counterpart to Solidity's `uint176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toUint176(uint256 value) internal pure returns (uint176) { require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits"); return uint176(value); } /** * @dev Returns the downcasted uint168 from uint256, reverting on * overflow (when the input is greater than largest uint168). * * Counterpart to Solidity's `uint168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toUint168(uint256 value) internal pure returns (uint168) { require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits"); return uint168(value); } /** * @dev Returns the downcasted uint160 from uint256, reverting on * overflow (when the input is greater than largest uint160). * * Counterpart to Solidity's `uint160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toUint160(uint256 value) internal pure returns (uint160) { require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits"); return uint160(value); } /** * @dev Returns the downcasted uint152 from uint256, reverting on * overflow (when the input is greater than largest uint152). * * Counterpart to Solidity's `uint152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toUint152(uint256 value) internal pure returns (uint152) { require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits"); return uint152(value); } /** * @dev Returns the downcasted uint144 from uint256, reverting on * overflow (when the input is greater than largest uint144). * * Counterpart to Solidity's `uint144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toUint144(uint256 value) internal pure returns (uint144) { require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits"); return uint144(value); } /** * @dev Returns the downcasted uint136 from uint256, reverting on * overflow (when the input is greater than largest uint136). * * Counterpart to Solidity's `uint136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toUint136(uint256 value) internal pure returns (uint136) { require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits"); return uint136(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v2.5._ */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint120 from uint256, reverting on * overflow (when the input is greater than largest uint120). * * Counterpart to Solidity's `uint120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toUint120(uint256 value) internal pure returns (uint120) { require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits"); return uint120(value); } /** * @dev Returns the downcasted uint112 from uint256, reverting on * overflow (when the input is greater than largest uint112). * * Counterpart to Solidity's `uint112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toUint112(uint256 value) internal pure returns (uint112) { require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits"); return uint112(value); } /** * @dev Returns the downcasted uint104 from uint256, reverting on * overflow (when the input is greater than largest uint104). * * Counterpart to Solidity's `uint104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toUint104(uint256 value) internal pure returns (uint104) { require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits"); return uint104(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.2._ */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint88 from uint256, reverting on * overflow (when the input is greater than largest uint88). * * Counterpart to Solidity's `uint88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toUint88(uint256 value) internal pure returns (uint88) { require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits"); return uint88(value); } /** * @dev Returns the downcasted uint80 from uint256, reverting on * overflow (when the input is greater than largest uint80). * * Counterpart to Solidity's `uint80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toUint80(uint256 value) internal pure returns (uint80) { require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits"); return uint80(value); } /** * @dev Returns the downcasted uint72 from uint256, reverting on * overflow (when the input is greater than largest uint72). * * Counterpart to Solidity's `uint72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toUint72(uint256 value) internal pure returns (uint72) { require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits"); return uint72(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v2.5._ */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint56 from uint256, reverting on * overflow (when the input is greater than largest uint56). * * Counterpart to Solidity's `uint56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toUint56(uint256 value) internal pure returns (uint56) { require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits"); return uint56(value); } /** * @dev Returns the downcasted uint48 from uint256, reverting on * overflow (when the input is greater than largest uint48). * * Counterpart to Solidity's `uint48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toUint48(uint256 value) internal pure returns (uint48) { require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits"); return uint48(value); } /** * @dev Returns the downcasted uint40 from uint256, reverting on * overflow (when the input is greater than largest uint40). * * Counterpart to Solidity's `uint40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toUint40(uint256 value) internal pure returns (uint40) { require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits"); return uint40(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v2.5._ */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint24 from uint256, reverting on * overflow (when the input is greater than largest uint24). * * Counterpart to Solidity's `uint24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toUint24(uint256 value) internal pure returns (uint24) { require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits"); return uint24(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v2.5._ */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v2.5._ */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. * * _Available since v3.0._ */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int248 from int256, reverting on * overflow (when the input is less than smallest int248 or * greater than largest int248). * * Counterpart to Solidity's `int248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toInt248(int256 value) internal pure returns (int248 downcasted) { downcasted = int248(value); require(downcasted == value, "SafeCast: value doesn't fit in 248 bits"); } /** * @dev Returns the downcasted int240 from int256, reverting on * overflow (when the input is less than smallest int240 or * greater than largest int240). * * Counterpart to Solidity's `int240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toInt240(int256 value) internal pure returns (int240 downcasted) { downcasted = int240(value); require(downcasted == value, "SafeCast: value doesn't fit in 240 bits"); } /** * @dev Returns the downcasted int232 from int256, reverting on * overflow (when the input is less than smallest int232 or * greater than largest int232). * * Counterpart to Solidity's `int232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toInt232(int256 value) internal pure returns (int232 downcasted) { downcasted = int232(value); require(downcasted == value, "SafeCast: value doesn't fit in 232 bits"); } /** * @dev Returns the downcasted int224 from int256, reverting on * overflow (when the input is less than smallest int224 or * greater than largest int224). * * Counterpart to Solidity's `int224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.7._ */ function toInt224(int256 value) internal pure returns (int224 downcasted) { downcasted = int224(value); require(downcasted == value, "SafeCast: value doesn't fit in 224 bits"); } /** * @dev Returns the downcasted int216 from int256, reverting on * overflow (when the input is less than smallest int216 or * greater than largest int216). * * Counterpart to Solidity's `int216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toInt216(int256 value) internal pure returns (int216 downcasted) { downcasted = int216(value); require(downcasted == value, "SafeCast: value doesn't fit in 216 bits"); } /** * @dev Returns the downcasted int208 from int256, reverting on * overflow (when the input is less than smallest int208 or * greater than largest int208). * * Counterpart to Solidity's `int208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toInt208(int256 value) internal pure returns (int208 downcasted) { downcasted = int208(value); require(downcasted == value, "SafeCast: value doesn't fit in 208 bits"); } /** * @dev Returns the downcasted int200 from int256, reverting on * overflow (when the input is less than smallest int200 or * greater than largest int200). * * Counterpart to Solidity's `int200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toInt200(int256 value) internal pure returns (int200 downcasted) { downcasted = int200(value); require(downcasted == value, "SafeCast: value doesn't fit in 200 bits"); } /** * @dev Returns the downcasted int192 from int256, reverting on * overflow (when the input is less than smallest int192 or * greater than largest int192). * * Counterpart to Solidity's `int192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toInt192(int256 value) internal pure returns (int192 downcasted) { downcasted = int192(value); require(downcasted == value, "SafeCast: value doesn't fit in 192 bits"); } /** * @dev Returns the downcasted int184 from int256, reverting on * overflow (when the input is less than smallest int184 or * greater than largest int184). * * Counterpart to Solidity's `int184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toInt184(int256 value) internal pure returns (int184 downcasted) { downcasted = int184(value); require(downcasted == value, "SafeCast: value doesn't fit in 184 bits"); } /** * @dev Returns the downcasted int176 from int256, reverting on * overflow (when the input is less than smallest int176 or * greater than largest int176). * * Counterpart to Solidity's `int176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toInt176(int256 value) internal pure returns (int176 downcasted) { downcasted = int176(value); require(downcasted == value, "SafeCast: value doesn't fit in 176 bits"); } /** * @dev Returns the downcasted int168 from int256, reverting on * overflow (when the input is less than smallest int168 or * greater than largest int168). * * Counterpart to Solidity's `int168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toInt168(int256 value) internal pure returns (int168 downcasted) { downcasted = int168(value); require(downcasted == value, "SafeCast: value doesn't fit in 168 bits"); } /** * @dev Returns the downcasted int160 from int256, reverting on * overflow (when the input is less than smallest int160 or * greater than largest int160). * * Counterpart to Solidity's `int160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toInt160(int256 value) internal pure returns (int160 downcasted) { downcasted = int160(value); require(downcasted == value, "SafeCast: value doesn't fit in 160 bits"); } /** * @dev Returns the downcasted int152 from int256, reverting on * overflow (when the input is less than smallest int152 or * greater than largest int152). * * Counterpart to Solidity's `int152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toInt152(int256 value) internal pure returns (int152 downcasted) { downcasted = int152(value); require(downcasted == value, "SafeCast: value doesn't fit in 152 bits"); } /** * @dev Returns the downcasted int144 from int256, reverting on * overflow (when the input is less than smallest int144 or * greater than largest int144). * * Counterpart to Solidity's `int144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toInt144(int256 value) internal pure returns (int144 downcasted) { downcasted = int144(value); require(downcasted == value, "SafeCast: value doesn't fit in 144 bits"); } /** * @dev Returns the downcasted int136 from int256, reverting on * overflow (when the input is less than smallest int136 or * greater than largest int136). * * Counterpart to Solidity's `int136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toInt136(int256 value) internal pure returns (int136 downcasted) { downcasted = int136(value); require(downcasted == value, "SafeCast: value doesn't fit in 136 bits"); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128 downcasted) { downcasted = int128(value); require(downcasted == value, "SafeCast: value doesn't fit in 128 bits"); } /** * @dev Returns the downcasted int120 from int256, reverting on * overflow (when the input is less than smallest int120 or * greater than largest int120). * * Counterpart to Solidity's `int120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toInt120(int256 value) internal pure returns (int120 downcasted) { downcasted = int120(value); require(downcasted == value, "SafeCast: value doesn't fit in 120 bits"); } /** * @dev Returns the downcasted int112 from int256, reverting on * overflow (when the input is less than smallest int112 or * greater than largest int112). * * Counterpart to Solidity's `int112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toInt112(int256 value) internal pure returns (int112 downcasted) { downcasted = int112(value); require(downcasted == value, "SafeCast: value doesn't fit in 112 bits"); } /** * @dev Returns the downcasted int104 from int256, reverting on * overflow (when the input is less than smallest int104 or * greater than largest int104). * * Counterpart to Solidity's `int104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toInt104(int256 value) internal pure returns (int104 downcasted) { downcasted = int104(value); require(downcasted == value, "SafeCast: value doesn't fit in 104 bits"); } /** * @dev Returns the downcasted int96 from int256, reverting on * overflow (when the input is less than smallest int96 or * greater than largest int96). * * Counterpart to Solidity's `int96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.7._ */ function toInt96(int256 value) internal pure returns (int96 downcasted) { downcasted = int96(value); require(downcasted == value, "SafeCast: value doesn't fit in 96 bits"); } /** * @dev Returns the downcasted int88 from int256, reverting on * overflow (when the input is less than smallest int88 or * greater than largest int88). * * Counterpart to Solidity's `int88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toInt88(int256 value) internal pure returns (int88 downcasted) { downcasted = int88(value); require(downcasted == value, "SafeCast: value doesn't fit in 88 bits"); } /** * @dev Returns the downcasted int80 from int256, reverting on * overflow (when the input is less than smallest int80 or * greater than largest int80). * * Counterpart to Solidity's `int80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toInt80(int256 value) internal pure returns (int80 downcasted) { downcasted = int80(value); require(downcasted == value, "SafeCast: value doesn't fit in 80 bits"); } /** * @dev Returns the downcasted int72 from int256, reverting on * overflow (when the input is less than smallest int72 or * greater than largest int72). * * Counterpart to Solidity's `int72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toInt72(int256 value) internal pure returns (int72 downcasted) { downcasted = int72(value); require(downcasted == value, "SafeCast: value doesn't fit in 72 bits"); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64 downcasted) { downcasted = int64(value); require(downcasted == value, "SafeCast: value doesn't fit in 64 bits"); } /** * @dev Returns the downcasted int56 from int256, reverting on * overflow (when the input is less than smallest int56 or * greater than largest int56). * * Counterpart to Solidity's `int56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toInt56(int256 value) internal pure returns (int56 downcasted) { downcasted = int56(value); require(downcasted == value, "SafeCast: value doesn't fit in 56 bits"); } /** * @dev Returns the downcasted int48 from int256, reverting on * overflow (when the input is less than smallest int48 or * greater than largest int48). * * Counterpart to Solidity's `int48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toInt48(int256 value) internal pure returns (int48 downcasted) { downcasted = int48(value); require(downcasted == value, "SafeCast: value doesn't fit in 48 bits"); } /** * @dev Returns the downcasted int40 from int256, reverting on * overflow (when the input is less than smallest int40 or * greater than largest int40). * * Counterpart to Solidity's `int40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toInt40(int256 value) internal pure returns (int40 downcasted) { downcasted = int40(value); require(downcasted == value, "SafeCast: value doesn't fit in 40 bits"); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32 downcasted) { downcasted = int32(value); require(downcasted == value, "SafeCast: value doesn't fit in 32 bits"); } /** * @dev Returns the downcasted int24 from int256, reverting on * overflow (when the input is less than smallest int24 or * greater than largest int24). * * Counterpart to Solidity's `int24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toInt24(int256 value) internal pure returns (int24 downcasted) { downcasted = int24(value); require(downcasted == value, "SafeCast: value doesn't fit in 24 bits"); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16 downcasted) { downcasted = int16(value); require(downcasted == value, "SafeCast: value doesn't fit in 16 bits"); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8 downcasted) { downcasted = int8(value); require(downcasted == value, "SafeCast: value doesn't fit in 8 bits"); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. * * _Available since v3.0._ */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Multicall.sol) pragma solidity ^0.8.0; import "./Address.sol"; /** * @dev Provides a function to batch together multiple calls in a single external call. * * _Available since v4.1._ */ abstract contract Multicall { /** * @dev Receives and executes a batch of function calls on this contract. * @custom:oz-upgrades-unsafe-allow-reachable delegatecall */ function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) { results = new bytes[](data.length); for (uint256 i = 0; i < data.length; i++) { results[i] = Address.functionDelegateCall(address(this), data[i]); } return results; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ```solidity * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/utils/math/Math.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "./Pool.sol"; import "./LoanReceipt.sol"; import "./LiquidityLogic.sol"; import "./interfaces/IPool.sol"; import "./integrations/DelegateCash/IDelegateRegistryV1.sol"; import "./integrations/DelegateCash/IDelegateRegistryV2.sol"; /** * @title Borrow Logic * @author MetaStreet Labs */ library BorrowLogic { using SafeCast for uint256; using LiquidityLogic for LiquidityLogic.Liquidity; /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Borrow options tag size in bytes */ uint256 internal constant BORROW_OPTIONS_TAG_SIZE = 2; /** * @notice Borrow options length size in bytes */ uint256 internal constant BORROW_OPTIONS_LENGTH_SIZE = 2; /**************************************************************************/ /* Helpers */ /**************************************************************************/ /** * @notice Helper function to extract specified option tag from options * data * * @dev Options are encoded as: * 2 byte uint16 tag * 2 byte uint16 length * n byte bytes data * The first matching tag is returned. * * @param options Encoded options * @param tag Tag to find * @return Options data */ function _getOptionsData(bytes calldata options, Pool.BorrowOptions tag) internal pure returns (bytes calldata) { /* Scan the options for the tag */ for (uint256 offsetTag; offsetTag < options.length; ) { /* Compute offsets with for tag length and data */ uint256 offsetLength = offsetTag + BORROW_OPTIONS_TAG_SIZE; uint256 offsetData = offsetTag + BORROW_OPTIONS_TAG_SIZE + BORROW_OPTIONS_LENGTH_SIZE; /* The tag is in the first 2 bytes of each options item */ uint256 currentTag = uint16(bytes2(options[offsetTag:offsetLength])); /* The length of the options data is in the second 2 bytes of each options item, after the tag */ uint256 dataLength = uint16(bytes2(options[offsetLength:offsetData])); /* Return the offset and length if the tag is found */ if (currentTag == uint256(tag)) { return options[offsetData:offsetData + dataLength]; } /* Increment to next options item */ offsetTag = offsetData + dataLength; } /* Return empty slice if no tag is found */ return options[0:0]; } /** * @notice Helper function that calls delegate.cash registry to delegate token * * @param delegations Delegate storage * @param collateralToken Collateral token * @param collateralTokenId Collateral token ID * @param delegateRegistryV1 Delegate registry v1 address * @param delegateRegistryV2 Delegate registry v2 address * @param options Options data */ function _optionDelegateCash( Pool.DelegateStorage storage delegations, address collateralToken, uint256 collateralTokenId, address delegateRegistryV1, address delegateRegistryV2, bytes calldata options ) external { /* Find delegate.cash v2 tagged data in options */ bytes calldata delegateDataV2 = _getOptionsData(options, Pool.BorrowOptions.DelegateCashV2); if (delegateDataV2.length != 0) { if (delegateRegistryV2 == address(0)) revert IPool.InvalidBorrowOptions(); if (delegateDataV2.length != 20) revert IPool.InvalidBorrowOptions(); /* Store delegate in mapping */ delegations.delegates[collateralToken][collateralTokenId] = Pool.Delegate({ version: Pool.DelegateVersion.DelegateCashV2, to: address(uint160(bytes20(delegateDataV2))) }); /* Delegate token */ IDelegateRegistryV2(delegateRegistryV2).delegateERC721( address(uint160(bytes20(delegateDataV2))), collateralToken, collateralTokenId, "", true ); /* Return if found, skip additional search */ return; } /* Find delegate.cash v1 tagged data in options, if v2 data is empty */ bytes calldata delegateDataV1 = _getOptionsData(options, Pool.BorrowOptions.DelegateCashV1); if (delegateDataV1.length != 0) { if (delegateRegistryV1 == address(0)) revert IPool.InvalidBorrowOptions(); if (delegateDataV1.length != 20) revert IPool.InvalidBorrowOptions(); /* Store delegate in mapping */ delegations.delegates[collateralToken][collateralTokenId] = Pool.Delegate({ version: Pool.DelegateVersion.DelegateCashV1, to: address(uint160(bytes20(delegateDataV1))) }); /* Delegate token */ IDelegateRegistryV1(delegateRegistryV1).delegateForToken( address(uint160(bytes20(delegateDataV1))), collateralToken, collateralTokenId, true ); } } /** * @notice Helper function to revoke token delegate * * @param delegations Delegate storage * @param collateralToken Contract address of token that delegation is being removed from * @param collateralTokenId Token id of token that delegation is being removed from * @param delegateRegistryV1 Delegate registry v1 address * @param delegateRegistryV2 Delegate registry v2 address */ function _revokeDelegates( Pool.DelegateStorage storage delegations, address collateralToken, uint256 collateralTokenId, address delegateRegistryV1, address delegateRegistryV2 ) external { Pool.Delegate memory delegate = delegations.delegates[collateralToken][collateralTokenId]; if (delegate.version == Pool.DelegateVersion.None) { return; } else if (delegate.version == Pool.DelegateVersion.DelegateCashV2) { IDelegateRegistryV2(delegateRegistryV2).delegateERC721( delegate.to, collateralToken, collateralTokenId, "", false ); } else if (delegate.version == Pool.DelegateVersion.DelegateCashV1) { IDelegateRegistryV1(delegateRegistryV1).delegateForToken( delegate.to, collateralToken, collateralTokenId, false ); } /* Remove delegate from mapping */ delete delegations.delegates[collateralToken][collateralTokenId]; } /** * @dev Helper function to calculated prorated repayment * @param loanReceipt Decoded loan receipt * @return repayment amount in currency tokens * @return proration based on elapsed duration */ function _prorateRepayment( LoanReceipt.LoanReceiptV2 memory loanReceipt ) internal view returns (uint256 repayment, uint256 proration) { /* Minimum of proration and 1.0 */ proration = Math.min( ((block.timestamp - (loanReceipt.maturity - loanReceipt.duration)) * LiquidityLogic.FIXED_POINT_SCALE) / loanReceipt.duration, LiquidityLogic.FIXED_POINT_SCALE ); /* Compute repayment using prorated interest */ repayment = loanReceipt.principal + (((loanReceipt.repayment - loanReceipt.principal) * proration) / LiquidityLogic.FIXED_POINT_SCALE); } /** * @dev Helper function to decode a loan receipt * @param loanReceipt Loan receipt * @return Decoded loan receipt */ function _decodeLoanReceipt(bytes calldata loanReceipt) external pure returns (LoanReceipt.LoanReceiptV2 memory) { return LoanReceipt.decode(loanReceipt); } /** * @dev Helper function to handle borrow accounting * @param self Pool storage * @param principal Principal amount in currency tokens * @param duration Duration in seconds * @param collateralToken Collateral token address * @param collateralTokenId Collateral token ID * @param repayment Repayment amount in currency tokens * @param maxRepayment Maximum repayment amount in currency tokens * @param adminFee Admin fee * @param nodes Liquidity nodes * @param count Liquidity nodes count * @param collateralWrapperContext Collateral wrapper context data * @return Encoded loan receipt, loan receipt hash */ function _borrow( Pool.PoolStorage storage self, uint256 principal, uint64 duration, address collateralToken, uint256 collateralTokenId, uint256 repayment, uint256 maxRepayment, uint256 adminFee, LiquidityLogic.NodeSource[] memory nodes, uint16 count, bytes memory collateralWrapperContext ) external returns (bytes memory, bytes32) { /* Validate principal is non-zero */ if (principal == 0) revert IPool.InvalidParameters(); /* Validate duration is non-zero */ if (duration == 0) revert IPool.UnsupportedLoanDuration(); /* Validate repayment */ if (repayment > maxRepayment) revert IPool.RepaymentTooHigh(); /* Build the loan receipt */ LoanReceipt.LoanReceiptV2 memory receipt = LoanReceipt.LoanReceiptV2({ version: 2, principal: principal, repayment: repayment, adminFee: adminFee, borrower: msg.sender, maturity: (block.timestamp + duration).toUint64(), duration: duration, collateralToken: collateralToken, collateralTokenId: collateralTokenId, collateralWrapperContextLen: collateralWrapperContext.length.toUint16(), collateralWrapperContext: collateralWrapperContext, nodeReceipts: new LoanReceipt.NodeReceipt[](count) }); /* Use liquidity nodes */ for (uint256 i; i < count; i++) { /* Use node */ self.liquidity.use(nodes[i].tick, nodes[i].used, nodes[i].pending, duration); /* Construct node receipt */ receipt.nodeReceipts[i] = LoanReceipt.NodeReceipt({ tick: nodes[i].tick, used: nodes[i].used, pending: nodes[i].pending }); } /* Encode and hash the loan receipt */ bytes memory encodedLoanReceipt = LoanReceipt.encode(receipt); bytes32 loanReceiptHash = LoanReceipt.hash(encodedLoanReceipt); /* Validate no loan receipt hash collision */ if (self.loans[loanReceiptHash] != Pool.LoanStatus.Uninitialized) revert IPool.InvalidLoanReceipt(); /* Store loan status */ self.loans[loanReceiptHash] = Pool.LoanStatus.Active; return (encodedLoanReceipt, loanReceiptHash); } /** * @dev Helper function to handle repay accounting * @param self Pool storage * @param encodedLoanReceipt Encoded loan receipt * @return Repayment amount in currency tokens, decoded loan receipt, loan * receipt hash */ function _repay( Pool.PoolStorage storage self, bytes calldata encodedLoanReceipt ) external returns (uint256, LoanReceipt.LoanReceiptV2 memory, bytes32) { /* Compute loan receipt hash */ bytes32 loanReceiptHash = LoanReceipt.hash(encodedLoanReceipt); /* Validate loan receipt */ if (self.loans[loanReceiptHash] != Pool.LoanStatus.Active) revert IPool.InvalidLoanReceipt(); /* Decode loan receipt */ LoanReceipt.LoanReceiptV2 memory loanReceipt = LoanReceipt.decode(encodedLoanReceipt); /* Validate borrow and repay is not in same block */ if (loanReceipt.maturity - loanReceipt.duration == block.timestamp) revert IPool.InvalidLoanReceipt(); /* Validate caller is borrower */ if (msg.sender != loanReceipt.borrower) revert IPool.InvalidCaller(); /* Compute proration and repayment using prorated interest */ (uint256 repayment, uint256 proration) = _prorateRepayment(loanReceipt); /* Compute elapsed time since loan origination */ uint64 elapsed = uint64(block.timestamp + loanReceipt.duration - loanReceipt.maturity); /* Restore liquidity nodes */ for (uint256 i; i < loanReceipt.nodeReceipts.length; i++) { /* Restore node */ self.liquidity.restore( loanReceipt.nodeReceipts[i].tick, loanReceipt.nodeReceipts[i].used, loanReceipt.nodeReceipts[i].pending, loanReceipt.nodeReceipts[i].used + uint128( ((loanReceipt.nodeReceipts[i].pending - loanReceipt.nodeReceipts[i].used) * proration) / LiquidityLogic.FIXED_POINT_SCALE ), loanReceipt.duration, elapsed ); } /* Update admin fee total balance with prorated admin fee */ self.adminFeeBalance += (loanReceipt.adminFee * proration) / LiquidityLogic.FIXED_POINT_SCALE; /* Mark loan status repaid */ self.loans[loanReceiptHash] = Pool.LoanStatus.Repaid; return (repayment, loanReceipt, loanReceiptHash); } /** * @dev Helper function to handle liquidate accounting * @param self Pool storage * @param encodedLoanReceipt Encoded loan receipt * @return Decoded loan receipt, loan receipt hash */ function _liquidate( Pool.PoolStorage storage self, bytes calldata encodedLoanReceipt ) external returns (LoanReceipt.LoanReceiptV2 memory, bytes32) { /* Compute loan receipt hash */ bytes32 loanReceiptHash = LoanReceipt.hash(encodedLoanReceipt); /* Validate loan status is active */ if (self.loans[loanReceiptHash] != Pool.LoanStatus.Active) revert IPool.InvalidLoanReceipt(); /* Decode loan receipt */ LoanReceipt.LoanReceiptV2 memory loanReceipt = LoanReceipt.decode(encodedLoanReceipt); /* Validate loan is expired */ if (block.timestamp <= loanReceipt.maturity) revert IPool.LoanNotExpired(); /* Mark loan status liquidated */ self.loans[loanReceiptHash] = Pool.LoanStatus.Liquidated; return (loanReceipt, loanReceiptHash); } /** * @dev Helper function to handle collateral liquidation accounting * @param self Pool storage * @param encodedLoanReceipt Encoded loan receipt * @param proceeds Proceeds amount in currency tokens * @return Borrower surplus, decoded loan receipt, loan receipt hash */ function _onCollateralLiquidated( Pool.PoolStorage storage self, bytes calldata encodedLoanReceipt, uint256 proceeds ) external returns (uint256, LoanReceipt.LoanReceiptV2 memory, bytes32) { /* Compute loan receipt hash */ bytes32 loanReceiptHash = LoanReceipt.hash(encodedLoanReceipt); /* Validate loan status is liquidated */ if (self.loans[loanReceiptHash] != Pool.LoanStatus.Liquidated) revert IPool.InvalidLoanReceipt(); /* Decode loan receipt */ LoanReceipt.LoanReceiptV2 memory loanReceipt = LoanReceipt.decode(encodedLoanReceipt); /* Compute borrower's share of liquidation surplus */ uint256 borrowerSurplus = proceeds > loanReceipt.repayment ? proceeds - loanReceipt.repayment : 0; /* Compute elapsed time since loan origination */ uint64 elapsed = uint64(block.timestamp + loanReceipt.duration - loanReceipt.maturity); /* Restore liquidity nodes */ uint256 proceedsRemaining = proceeds - borrowerSurplus; uint256 lastIndex = loanReceipt.nodeReceipts.length - 1; for (uint256 i; i < loanReceipt.nodeReceipts.length; i++) { /* Compute amount to restore depending on whether there is a surplus */ uint256 restored = (i == lastIndex) ? proceedsRemaining : Math.min(loanReceipt.nodeReceipts[i].pending, proceedsRemaining); /* Restore node */ self.liquidity.restore( loanReceipt.nodeReceipts[i].tick, loanReceipt.nodeReceipts[i].used, loanReceipt.nodeReceipts[i].pending, restored.toUint128(), loanReceipt.duration, elapsed ); /* Update proceeds remaining */ proceedsRemaining -= restored; } /* Mark loan status collateral liquidated */ self.loans[loanReceiptHash] = Pool.LoanStatus.CollateralLiquidated; return (borrowerSurplus, loanReceipt, loanReceiptHash); } /** * @dev Helper function to set admin fee rate * @param self Pool storage * @param rate Rate is the admin fee in basis points */ function _setAdminFeeRate(Pool.PoolStorage storage self, uint32 rate) external { if (msg.sender != self.admin) revert IPool.InvalidCaller(); if (rate >= LiquidityLogic.BASIS_POINTS_SCALE) revert IPool.InvalidParameters(); self.adminFeeRate = rate; } /** * @dev Helper function to withdraw admin fees * @param self Pool storage * @param recipient Recipient account * @param scaledAmount Amount to withdraw */ function _withdrawAdminFees(Pool.PoolStorage storage self, address recipient, uint256 scaledAmount) external { if (msg.sender != self.admin) revert IPool.InvalidCaller(); if (recipient == address(0) || scaledAmount > self.adminFeeBalance) revert IPool.InvalidParameters(); /* Update admin fees balance */ self.adminFeeBalance -= scaledAmount; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "./Pool.sol"; import "./Tick.sol"; import "./LiquidityLogic.sol"; import "./interfaces/IPool.sol"; /** * @title Deposit Logic * @author MetaStreet Labs */ library DepositLogic { using LiquidityLogic for LiquidityLogic.Liquidity; /** * @dev Helper function to handle deposit accounting * @param self Pool storage * @param tick Tick * @param amount Amount * @param minShares Minimum shares * @return Deposit shares */ function _deposit( Pool.PoolStorage storage self, uint128 tick, uint128 amount, uint128 minShares ) external returns (uint128) { /* Validate tick */ Tick.validate(tick, 0, 0, self.durations.length - 1, 0, self.rates.length - 1); /* Deposit into liquidity node */ uint128 shares = self.liquidity.deposit(tick, amount); /* Validate shares received is sufficient */ if (shares == 0 || shares < minShares) revert IPool.InsufficientShares(); /* Add to deposit */ self.deposits[msg.sender][tick].shares += shares; return shares; } /** * @dev Helper function to handle redeem accounting * @param self Pool storage * @param tick Tick * @param shares Shares * @return redemptionId Redemption ID */ function _redeem(Pool.PoolStorage storage self, uint128 tick, uint128 shares) external returns (uint128) { /* Look up deposit */ Pool.Deposit storage dep = self.deposits[msg.sender][tick]; /* Assign redemption ID */ uint128 redemptionId = dep.redemptionId++; /* Look up redemption */ Pool.Redemption storage redemption = dep.redemptions[redemptionId]; /* Validate shares */ if (shares == 0 || shares > dep.shares) revert IPool.InsufficientShares(); /* Redeem shares in tick with liquidity manager */ (uint128 index, uint128 target) = self.liquidity.redeem(tick, shares); /* Update deposit state */ redemption.pending = shares; redemption.index = index; redemption.target = target; /* Decrement deposit shares */ dep.shares -= shares; return redemptionId; } /** * @dev Helper function to handle withdraw accounting * @param self Pool storage * @param tick Tick * @param redemptionId Redemption ID * @return Withdrawn shares and withdrawn amount */ function _withdraw( Pool.PoolStorage storage self, uint128 tick, uint128 redemptionId ) external returns (uint128, uint128) { /* Look up redemption */ Pool.Redemption storage redemption = self.deposits[msg.sender][tick].redemptions[redemptionId]; /* If no redemption is pending */ if (redemption.pending == 0) revert IPool.InvalidRedemptionStatus(); /* Look up redemption available */ (uint128 shares, uint128 amount, uint128 processedIndices, uint128 processedShares) = self .liquidity .redemptionAvailable(tick, redemption.pending, redemption.index, redemption.target); /* If the entire redemption is ready */ if (shares == redemption.pending) { delete self.deposits[msg.sender][tick].redemptions[redemptionId]; } else { redemption.pending -= shares; redemption.index += processedIndices; redemption.target = (processedShares < redemption.target) ? redemption.target - processedShares : 0; } return (shares, amount); } /** * @dev Helper function to handle transfer accounting * @param self Pool storage * @param from From * @param to To * @param tick Tick * @param shares Shares */ function _transfer(Pool.PoolStorage storage self, address from, address to, uint128 tick, uint128 shares) external { if (self.deposits[from][tick].shares < shares) revert IPool.InsufficientShares(); self.deposits[from][tick].shares -= shares; self.deposits[to][tick].shares += shares; } /** * Helper function to look up redemption available * @param self Pool storage * @param account Account * @param tick Tick * @param redemptionId Redemption ID * @return shares Amount of deposit shares available for redemption * @return amount Amount of currency tokens available for withdrawal * @return sharesAhead Amount of pending shares ahead in queue */ function _redemptionAvailable( Pool.PoolStorage storage self, address account, uint128 tick, uint128 redemptionId ) external view returns (uint256 shares, uint256 amount, uint256 sharesAhead) { /* Look up redemption */ Pool.Redemption storage redemption = self.deposits[account][tick].redemptions[redemptionId]; /* If no redemption is pending */ if (redemption.pending == 0) return (0, 0, 0); uint128 processedShares; (shares, amount, , processedShares) = self.liquidity.redemptionAvailable( tick, redemption.pending, redemption.index, redemption.target ); /* Compute pending shares ahead in queue */ sharesAhead = redemption.target > processedShares ? redemption.target - processedShares : 0; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Collateral Filter API * @author MetaStreet Labs */ abstract contract CollateralFilter { /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice Invalid parameters */ error InvalidCollateralFilterParameters(); /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Get collateral filter name * @return Collateral filter name */ function COLLATERAL_FILTER_NAME() external view virtual returns (string memory); /** * @notice Get collateral filter version * @return Collateral filter version */ function COLLATERAL_FILTER_VERSION() external view virtual returns (string memory); /** * @notice Get collateral token * @return Collateral token contract */ function collateralToken() public view virtual returns (address); /** * @notice Get collateral tokens * @return Collateral token contract */ function collateralTokens() external view virtual returns (address[] memory); /** * Query if collateral token is supported * @param token Collateral token contract * @param tokenId Collateral Token ID * @param index Collateral Token ID index * @param context ABI-encoded context * @return True if supported, otherwise false */ function _collateralSupported( address token, uint256 tokenId, uint256 index, bytes calldata context ) internal view virtual returns (bool); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; import "./CollateralFilter.sol"; /** * @title Collection Collateral Filter * @author MetaStreet Labs */ contract CollectionCollateralFilter is CollateralFilter { using EnumerableSet for EnumerableSet.AddressSet; /**************************************************************************/ /* State */ /**************************************************************************/ /** * @notice Supported token */ address private _token; /** * @notice Set of supported aliases */ EnumerableSet.AddressSet private _aliases; /**************************************************************************/ /* Initializer */ /**************************************************************************/ /** * @notice CollectionCollateralFilter initializer */ function _initialize(address[] memory tokens) internal { if (tokens.length == 0) revert InvalidCollateralFilterParameters(); _token = tokens[0]; for (uint256 i = 1; i < tokens.length; i++) { _aliases.add(tokens[i]); } } /**************************************************************************/ /* Implementation */ /**************************************************************************/ /** * @inheritdoc CollateralFilter */ function COLLATERAL_FILTER_NAME() external pure override returns (string memory) { return "CollectionCollateralFilter"; } /** * @inheritdoc CollateralFilter */ function COLLATERAL_FILTER_VERSION() external pure override returns (string memory) { return "1.0"; } /** * @inheritdoc CollateralFilter */ function collateralToken() public view override returns (address) { return _token; } /** * @inheritdoc CollateralFilter */ function collateralTokens() external view override returns (address[] memory) { address[] memory aliases = _aliases.values(); address[] memory tokens = new address[](1 + aliases.length); /* Assign collateral token to first index in array */ tokens[0] = _token; /* Fill the array with aliases */ for (uint256 i; i < aliases.length; i++) { tokens[i + 1] = aliases[i]; } return tokens; } /** * @inheritdoc CollateralFilter */ function _collateralSupported( address token, uint256, uint256, bytes calldata ) internal view override returns (bool) { return token == _token || _aliases.contains(token); } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.19; /** * @title IDelegateRegistryV1 * * @dev Subset of full interface */ interface IDelegateRegistryV1 { /// @notice Delegation type enum DelegationType { NONE, ALL, CONTRACT, TOKEN } /// @notice Info about a single delegation, used for onchain enumeration struct DelegationInfo { DelegationType type_; address vault; address delegate; address contract_; uint256 tokenId; } /// @notice Info about a single contract-level delegation struct ContractDelegation { address contract_; address delegate; } /// @notice Info about a single token-level delegation struct TokenDelegation { address contract_; uint256 tokenId; address delegate; } /// @notice Emitted when a user delegates a specific token event DelegateForToken(address vault, address delegate, address contract_, uint256 tokenId, bool value); /** * ----------- WRITE ----------- */ /** * @notice Allow the delegate to act on your behalf for a specific token * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param tokenId The token id for the token you're delegating * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking */ function delegateForToken(address delegate, address contract_, uint256 tokenId, bool value) external; /** * ----------- READ ----------- */ /** * @notice Returns an array of contract-level delegates for a given vault's token * @param vault The cold wallet who issued the delegation * @param contract_ The address for the contract holding the token * @param tokenId The token id for the token you're delegating * @return addresses Array of contract-level delegates for a given vault's token */ function getDelegatesForToken( address vault, address contract_, uint256 tokenId ) external view returns (address[] memory); /** * @notice Returns true if the address is delegated to act on the entire vault * @param delegate The hotwallet to act on your behalf * @param vault The cold wallet who issued the delegation */ function checkDelegateForAll(address delegate, address vault) external view returns (bool); /** * @notice Returns true if the address is delegated to act on your behalf for a token contract or an entire vault * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param vault The cold wallet who issued the delegation */ function checkDelegateForContract(address delegate, address vault, address contract_) external view returns (bool); /** * @notice Returns true if the address is delegated to act on your behalf for a specific token, the token's contract or an entire vault * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param tokenId The token id for the token you're delegating * @param vault The cold wallet who issued the delegation */ function checkDelegateForToken( address delegate, address vault, address contract_, uint256 tokenId ) external view returns (bool); }
// SPDX-License-Identifier: CC0-1.0 pragma solidity >=0.8.13; /** * @title IDelegateRegistryV2 * * @dev Subset of full interface * * @author foobar (0xfoobar) */ interface IDelegateRegistryV2 { /// @notice Delegation type, NONE is used when a delegation does not exist or is revoked enum DelegationType { NONE, ALL, CONTRACT, ERC721, ERC20, ERC1155 } /// @notice Struct for returning delegations struct Delegation { DelegationType type_; address to; address from; bytes32 rights; address contract_; uint256 tokenId; uint256 amount; } /// @notice Emitted when an address delegates or revokes rights for an ERC721 tokenId event DelegateERC721( address indexed from, address indexed to, address indexed contract_, uint256 tokenId, bytes32 rights, bool enable ); /** * ----------- WRITE ----------- */ /** * @notice Allow the delegate to act on behalf of `msg.sender` for a specific ERC721 token * @param to The address to act as delegate * @param contract_ The contract whose rights are being delegated * @param tokenId The token id to delegate * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights * @param enable Whether to enable or disable this delegation, true delegates and false revokes * @return delegationHash The unique identifier of the delegation */ function delegateERC721( address to, address contract_, uint256 tokenId, bytes32 rights, bool enable ) external payable returns (bytes32 delegationHash); /** * @notice Check if `to` is a delegate of `from` for the specific `contract` and `tokenId`, the entire `contract_`, or the entire wallet * @param to The delegated address to check * @param contract_ The specific contract address being checked * @param tokenId The token id for the token to delegating * @param from The wallet that issued the delegation * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only * @return valid Whether delegate is granted to act on from's behalf for entire wallet, that contract, or that specific tokenId */ function checkDelegateForERC721( address to, address from, address contract_, uint256 tokenId, bytes32 rights ) external view returns (bool); /** * ----------- ENUMERATIONS ----------- */ /** * @notice Returns all enabled delegations an address has given out * @param from The address to retrieve delegations for * @return delegations Array of Delegation structs */ function getOutgoingDelegations(address from) external view returns (Delegation[] memory delegations); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Interface to a Collateral Liquidation Receiver */ interface ICollateralLiquidationReceiver { /** * @notice Callback on collateral liquidated * @dev Pre-conditions: 1) proceeds were transferred, and 2) transferred amount >= proceeds * @param liquidationContext Liquidation context * @param proceeds Liquidation proceeds in currency tokens */ function onCollateralLiquidated(bytes calldata liquidationContext, uint256 proceeds) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Interface to a Collateral Liquidator */ interface ICollateralLiquidator { /** * @notice Get collateral liquidator name * @return Collateral liquidator name */ function name() external view returns (string memory); /** * @notice Liquidate collateral * @param currencyToken Currency token * @param collateralToken Collateral token, either underlying token or collateral wrapper * @param collateralTokenId Collateral token ID * @param collateralWrapperContext Collateral wrapper context * @param liquidationContext Liquidation callback context */ function liquidate( address currencyToken, address collateralToken, uint256 collateralTokenId, bytes calldata collateralWrapperContext, bytes calldata liquidationContext ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Interface to a Collateral Wrapper */ interface ICollateralWrapper { /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Get collateral wrapper name * @return Collateral wrapper name */ function name() external view returns (string memory); /** * @notice Enumerate wrapped collateral * @param tokenId Collateral wrapper token ID * @param context Implementation-specific context * @return token Token address * @return tokenIds List of unique token ids */ function enumerate( uint256 tokenId, bytes calldata context ) external view returns (address token, uint256[] memory tokenIds); /** * @notice Enumerate wrapped collateral with quantities of each token id * @param tokenId Collateral wrapper token ID * @param context Implementation-specific context * @return token Token address * @return tokenIds List of unique token ids * @return quantities List of quantities of each token id */ function enumerateWithQuantities( uint256 tokenId, bytes calldata context ) external view returns (address token, uint256[] memory tokenIds, uint256[] memory quantities); /** * @notice Get total token count represented by wrapped collateral * @param tokenId Collateral wrapper token ID * @param context Implementation-specific context * @return tokenCount Total token count */ function count(uint256 tokenId, bytes calldata context) external view returns (uint256 tokenCount); /* * Transfer collateral calldata * @param token Collateral token * @param from From address * @param to To address * @param tokenId Collateral wrapper token ID * @param quantity Quantity of token ID * @return target Transfer target * @return data Transfer calldata */ function transferCalldata( address token, address from, address to, uint256 tokenId, uint256 quantity ) external returns (address target, bytes memory data); /* * Unwrap collateral * @param tokenId Collateral wrapper token ID * @param context Implementation-specific context */ function unwrap(uint256 tokenId, bytes calldata context) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Interface to Liquidity state */ interface ILiquidity { /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice Insufficient liquidity */ error InsufficientLiquidity(); /** * @notice Inactive liquidity */ error InactiveLiquidity(); /** * @notice Insufficient tick spacing */ error InsufficientTickSpacing(); /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @notice Flattened liquidity node returned by getter * @param tick Tick * @param value Liquidity value * @param shares Liquidity shares outstanding * @param available Liquidity available * @param pending Liquidity pending (with interest) * @param redemptions Total pending redemptions * @param prev Previous liquidity node * @param next Next liquidity node */ struct NodeInfo { uint128 tick; uint128 value; uint128 shares; uint128 available; uint128 pending; uint128 redemptions; uint128 prev; uint128 next; } /** * @notice Accrual info returned by getter * @param accrued Accrued interest * @param rate Accrual rate * @param timestamp Accrual timestamp */ struct AccrualInfo { uint128 accrued; uint64 rate; uint64 timestamp; } /**************************************************************************/ /* API */ /**************************************************************************/ /** * Get liquidity nodes spanning [startTick, endTick] range * @param startTick Start tick * @param endTick End tick * @return Liquidity nodes */ function liquidityNodes(uint128 startTick, uint128 endTick) external view returns (NodeInfo[] memory); /** * Get liquidity node at tick * @param tick Tick * @return Liquidity node */ function liquidityNode(uint128 tick) external view returns (NodeInfo memory); /** * Get liquidity node with accrual info at tick * @param tick Tick * @return Liquidity node, Accrual info */ function liquidityNodeWithAccrual(uint128 tick) external view returns (NodeInfo memory, AccrualInfo memory); /** * @notice Get deposit share price * @param tick Tick * @return Deposit share price */ function depositSharePrice(uint128 tick) external view returns (uint256); /** * @notice Get redemption share price * @param tick Tick * @return Redemption share price */ function redemptionSharePrice(uint128 tick) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Interface to a Pool */ interface IPool { /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice Invalid caller */ error InvalidCaller(); /** * @notice Insufficient shares */ error InsufficientShares(); /** * @notice Invalid redemption status */ error InvalidRedemptionStatus(); /** * @notice Invalid loan receipt */ error InvalidLoanReceipt(); /** * @notice Invalid borrow options */ error InvalidBorrowOptions(); /** * @notice Unsupported collateral * @param index Index of unsupported asset */ error UnsupportedCollateral(uint256 index); /** * @notice Unsupported loan duration */ error UnsupportedLoanDuration(); /** * @notice Repayment too high */ error RepaymentTooHigh(); /** * @notice Loan not expired */ error LoanNotExpired(); /** * @notice Invalid parameters */ error InvalidParameters(); /**************************************************************************/ /* Events */ /**************************************************************************/ /** * @notice Emitted when currency is deposited * @param account Account * @param tick Tick * @param amount Amount of currency tokens * @param shares Amount of shares allocated */ event Deposited(address indexed account, uint128 indexed tick, uint256 amount, uint256 shares); /** * @notice Emitted when deposit shares are redeemed * @param account Account * @param tick Tick * @param redemptionId Redemption ID * @param shares Amount of shares to be redeemed */ event Redeemed(address indexed account, uint128 indexed tick, uint128 indexed redemptionId, uint256 shares); /** * @notice Emitted when redeemed currency tokens are withdrawn * @param account Account * @param tick Tick * @param redemptionId Redemption ID * @param shares Amount of shares redeemed * @param amount Amount of currency tokens withdrawn */ event Withdrawn( address indexed account, uint128 indexed tick, uint128 indexed redemptionId, uint256 shares, uint256 amount ); /** * @notice Emitted when deposit shares are transferred * @param from Source account * @param to Destination account * @param tick Tick * @param shares Amount of shares transferred */ event Transferred(address indexed from, address indexed to, uint128 indexed tick, uint256 shares); /** * @notice Emitted when a loan is originated * @param loanReceiptHash Loan receipt hash * @param loanReceipt Loan receipt */ event LoanOriginated(bytes32 indexed loanReceiptHash, bytes loanReceipt); /** * @notice Emitted when a loan is repaid * @param loanReceiptHash Loan receipt hash * @param repayment Repayment amount in currency tokens */ event LoanRepaid(bytes32 indexed loanReceiptHash, uint256 repayment); /** * @notice Emitted when a loan is liquidated * @param loanReceiptHash Loan receipt hash */ event LoanLiquidated(bytes32 indexed loanReceiptHash); /** * @notice Emitted when loan collateral is liquidated * @param loanReceiptHash Loan receipt hash * @param proceeds Total liquidation proceeds in currency tokens * @param borrowerProceeds Borrower's share of liquidation proceeds in * currency tokens */ event CollateralLiquidated(bytes32 indexed loanReceiptHash, uint256 proceeds, uint256 borrowerProceeds); /** * @notice Emitted when admin fee rate is updated * @param rate New admin fee rate in basis points */ event AdminFeeRateUpdated(uint256 rate); /** * @notice Emitted when admin fees are withdrawn * @param account Recipient account * @param amount Amount of currency tokens withdrawn */ event AdminFeesWithdrawn(address indexed account, uint256 amount); /**************************************************************************/ /* Getters */ /**************************************************************************/ /** * @notice Get currency token * @return Currency token contract */ function currencyToken() external view returns (address); /** * @notice Get supported durations * @return List of loan durations in second */ function durations() external view returns (uint64[] memory); /** * @notice Get supported rates * @return List of rates in interest per second */ function rates() external view returns (uint64[] memory); /** * @notice Get admin * @return Admin */ function admin() external view returns (address); /** * @notice Get admin fee rate * @return Admin fee rate in basis points */ function adminFeeRate() external view returns (uint32); /** * @notice Get admin fee balance * @return Admin fee balance in currency tokens */ function adminFeeBalance() external view returns (uint256); /** * @notice Get list of supported collateral wrappers * @return Collateral wrappers */ function collateralWrappers() external view returns (address[] memory); /** * @notice Get collateral liquidator contract * @return Collateral liquidator contract */ function collateralLiquidator() external view returns (address); /** * @notice Get delegation registry v1 contract * @return Delegation registry contract */ function delegationRegistry() external view returns (address); /** * @notice Get delegation registry v2 contract * @return Delegation registry contract */ function delegationRegistryV2() external view returns (address); /**************************************************************************/ /* Deposit API */ /**************************************************************************/ /** * @notice Deposit amount at tick * * Emits a {Deposited} event. * * @param tick Tick * @param amount Amount of currency tokens * @param minShares Minimum amount of shares to receive * @return shares Amount of shares minted */ function deposit(uint128 tick, uint256 amount, uint256 minShares) external returns (uint256 shares); /** * @notice Redeem deposit shares for currency tokens. Currency tokens can * be withdrawn with the `withdraw()` method once the redemption is * processed. * * Emits a {Redeemed} event. * * @param tick Tick * @param shares Amount of deposit shares to redeem * @return redemptionId Redemption ID */ function redeem(uint128 tick, uint256 shares) external returns (uint128 redemptionId); /** * @notice Get redemption available * * @param account Account * @param tick Tick * @param redemptionId Redemption ID * @return shares Amount of deposit shares available for redemption * @return amount Amount of currency tokens available for withdrawal * @return sharesAhead Amount of pending shares ahead in queue */ function redemptionAvailable( address account, uint128 tick, uint128 redemptionId ) external view returns (uint256 shares, uint256 amount, uint256 sharesAhead); /** * @notice Withdraw a redemption that is available * * Emits a {Withdrawn} event. * * @param tick Tick * @param redemptionId Redemption ID * @return shares Amount of deposit shares burned * @return amount Amount of currency tokens withdrawn */ function withdraw(uint128 tick, uint128 redemptionId) external returns (uint256 shares, uint256 amount); /** * @notice Rebalance a redemption that is available to a new tick * * Emits {Withdrawn} and {Deposited} events. * * @param srcTick Source tick * @param dstTick Destination Tick * @param redemptionId Redemption ID * @param minShares Minimum amount of destination shares to receive * @return oldShares Amount of source deposit shares burned * @return newShares Amount of destination deposit shares minted * @return amount Amount of currency tokens redeposited */ function rebalance( uint128 srcTick, uint128 dstTick, uint128 redemptionId, uint256 minShares ) external returns (uint256 oldShares, uint256 newShares, uint256 amount); /**************************************************************************/ /* Lend API */ /**************************************************************************/ /** * @notice Quote repayment for a loan * @param principal Principal amount in currency tokens * @param duration Duration in seconds * @param collateralToken Collateral token address * @param collateralTokenId Collateral token ID * @param ticks Liquidity ticks * @param options Encoded options * @return repayment Repayment amount in currency tokens */ function quote( uint256 principal, uint64 duration, address collateralToken, uint256 collateralTokenId, uint128[] calldata ticks, bytes calldata options ) external view returns (uint256 repayment); /** * @notice Originate a loan * * Emits a {LoanOriginated} event. * * @param principal Principal amount in currency tokens * @param duration Duration in seconds * @param collateralToken Collateral token address * @param collateralTokenId Collateral token ID * @param maxRepayment Maximum repayment amount in currency tokens * @param ticks Liquidity ticks * @param options Encoded options * @return repayment Repayment amount in currency tokens */ function borrow( uint256 principal, uint64 duration, address collateralToken, uint256 collateralTokenId, uint256 maxRepayment, uint128[] calldata ticks, bytes calldata options ) external returns (uint256 repayment); /** * @notice Repay a loan * * Emits a {LoanRepaid} event. * * @param encodedLoanReceipt Encoded loan receipt * @return repayment Repayment amount in currency tokens */ function repay(bytes calldata encodedLoanReceipt) external returns (uint256 repayment); /** * @notice Refinance a loan * * Emits a {LoanRepaid} event and a {LoanOriginated} event. * * @param encodedLoanReceipt Encoded loan receipt * @param principal Principal amount in currency tokens * @param duration Duration in seconds * @param maxRepayment Maximum repayment amount in currency tokens * @param ticks Liquidity ticks * @param options Encoded options * @return repayment Repayment amount in currency tokens */ function refinance( bytes calldata encodedLoanReceipt, uint256 principal, uint64 duration, uint256 maxRepayment, uint128[] calldata ticks, bytes calldata options ) external returns (uint256 repayment); /** * @notice Liquidate an expired loan * * Emits a {LoanLiquidated} event. * * @param loanReceipt Loan receipt */ function liquidate(bytes calldata loanReceipt) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Interface to a Price Oracle */ interface IPriceOracle { /** * @notice Fetch price of token IDs * @param collateralToken Pool collateral token * @param currencyToken Pool currency token * @param tokenIds Token IDs * @param tokenIdQuantities Token ID quantities * @param oracleContext Oracle context * @return price Token price in the same decimals as currency token */ function price( address collateralToken, address currencyToken, uint256[] memory tokenIds, uint256[] memory tokenIdQuantities, bytes calldata oracleContext ) external view returns (uint256 price); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/utils/math/Math.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "./interfaces/ILiquidity.sol"; import "./Tick.sol"; /** * @title Liquidity Logic * @author MetaStreet Labs */ library LiquidityLogic { /* * Liquidity nodes are arranged in a linked-list that starts with a zero * sentinel and ends with an end sentinel. There are two types of ticks, namely, * ratio ticks and absolute ticks (see more in Tick.sol). In the linked-list, * ratio ticks are ordered before absolute ticks. Within the types, they are * ordered in ascending order of their tick values. * * +--------------------------------------------------------------------+ * | Linked-List Layout | * +----------------------------------|------------------|--------------+ * | 0 | (Limit Type = 1) | (Limit Type = 0) | Max. uint128 | * | Zero Sentinel | Ratio Ticks | Absolute Ticks | End Sentinel | * +--------------------------------------------------------------------+ * */ using SafeCast for uint256; /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Tick limit spacing basis points for absolute type (10%) */ uint256 internal constant ABSOLUTE_TICK_LIMIT_SPACING_BASIS_POINTS = 1000; /** * @notice Tick limit spacing basis points for ratio type (5%) */ uint256 internal constant RATIO_TICK_LIMIT_SPACING_BASIS_POINTS = 500; /** * @notice Fixed point scale */ uint256 internal constant FIXED_POINT_SCALE = 1e18; /** * @notice Basis points scale */ uint256 internal constant BASIS_POINTS_SCALE = 10_000; /** * @notice Impaired price threshold (5%) */ uint256 internal constant IMPAIRED_PRICE_THRESHOLD = 0.05 * 1e18; /** * @notice Max ticks used count */ uint256 private constant MAX_TICKS_USED_COUNT = 32; /** * @notice Max redemption queue scan count */ uint256 private constant MAX_REDEMPTION_QUEUE_SCAN_COUNT = 150; /** * @notice Amount of shares to lock for initial deposit */ uint128 private constant LOCKED_SHARES = 1e6; /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @notice Node source * @param tick Tick * @param used Amount used * @param pending Amount pending */ struct NodeSource { uint128 tick; uint128 used; uint128 pending; } /** * @notice Fulfilled redemption * @param shares Shares redeemed * @param amount Amount redeemed */ struct FulfilledRedemption { uint128 shares; uint128 amount; } /** * @notice Redemption state * @param pending Pending shares * @param index Current index * @param fulfilled Fulfilled redemptions */ struct Redemptions { uint128 pending; uint128 index; mapping(uint128 => FulfilledRedemption) fulfilled; } /** * @notice Accrual state * @param accrued Accrued interest * @param rate Accrual rate * @param timestamp Last accrual timestamp */ struct Accrual { uint128 accrued; uint64 rate; uint64 timestamp; } /** * @notice Liquidity node * @param value Liquidity value * @param shares Liquidity shares outstanding * @param available Liquidity available * @param pending Liquidity pending (with interest) * @param prev Previous liquidity node * @param next Next liquidity node * @param redemption Redemption state * @param accrual Accrual state */ struct Node { uint128 value; uint128 shares; uint128 available; uint128 pending; uint128 prev; uint128 next; Redemptions redemptions; Accrual accrual; } /** * @notice Liquidity state * @param nodes Liquidity nodes */ struct Liquidity { mapping(uint256 => Node) nodes; } /**************************************************************************/ /* Getters */ /**************************************************************************/ /** * Get liquidity node at tick * @param liquidity Liquidity state * @param tick Tick * @return Liquidity node */ function liquidityNode(Liquidity storage liquidity, uint128 tick) public view returns (ILiquidity.NodeInfo memory) { Node storage node = liquidity.nodes[tick]; return ILiquidity.NodeInfo({ tick: tick, value: node.value, shares: node.shares, available: node.available, pending: node.pending, redemptions: node.redemptions.pending, prev: node.prev, next: node.next }); } /** * @notice Count liquidity nodes spanning [startTick, endTick] range, where * startTick is 0 or an instantiated tick * @param liquidity Liquidity state * @param startTick Start tick * @param endTick End tick * @return count Liquidity nodes count */ function liquidityNodesCount( Liquidity storage liquidity, uint128 startTick, uint128 endTick ) public view returns (uint256 count) { /* Validate start tick has active liquidity */ if (liquidity.nodes[startTick].next == 0) revert ILiquidity.InactiveLiquidity(); /* Count nodes */ uint256 t = startTick; while (t != type(uint128).max && t <= endTick) { t = liquidity.nodes[t].next; count++; } } /** * @notice Get liquidity nodes spanning [startTick, endTick] range, where * startTick is 0 or an instantiated tick * @param liquidity Liquidity state * @param startTick Start tick * @param endTick End tick * @return Liquidity nodes */ function liquidityNodes( Liquidity storage liquidity, uint128 startTick, uint128 endTick ) external view returns (ILiquidity.NodeInfo[] memory) { ILiquidity.NodeInfo[] memory nodes = new ILiquidity.NodeInfo[]( liquidityNodesCount(liquidity, startTick, endTick) ); /* Populate nodes */ uint256 i; uint128 t = startTick; while (t != type(uint128).max && t <= endTick) { nodes[i] = liquidityNode(liquidity, t); t = nodes[i++].next; } return nodes; } /** * @notice Get liquidity node with accrual info at tick * @param liquidity Liquidity state * @param tick Tick * @return Liquidity node, Accrual info */ function liquidityNodeWithAccrual( Liquidity storage liquidity, uint128 tick ) external view returns (ILiquidity.NodeInfo memory, ILiquidity.AccrualInfo memory) { Node storage node = liquidity.nodes[tick]; return ( ILiquidity.NodeInfo({ tick: tick, value: node.value, shares: node.shares, available: node.available, pending: node.pending, redemptions: node.redemptions.pending, prev: node.prev, next: node.next }), ILiquidity.AccrualInfo({ accrued: node.accrual.accrued, rate: node.accrual.rate, timestamp: node.accrual.timestamp }) ); } /** * @notice Get redemption available amount * @param liquidity Liquidity state * @param tick Tick * @param pending Redemption pending * @param index Redemption index * @param target Redemption target * @return redeemedShares Redeemed shares * @return redeemedAmount Redeemed amount * @return processedIndices Processed indices * @return processedShares Processed shares */ function redemptionAvailable( Liquidity storage liquidity, uint128 tick, uint128 pending, uint128 index, uint128 target ) internal view returns (uint128 redeemedShares, uint128 redeemedAmount, uint128 processedIndices, uint128 processedShares) { Node storage node = liquidity.nodes[tick]; uint256 stopIndex = index + MAX_REDEMPTION_QUEUE_SCAN_COUNT; for (; processedShares < target + pending && index < stopIndex; index++) { if (index == node.redemptions.index) { /* Reached pending unfulfilled redemption */ break; } /* Look up the next fulfilled redemption */ FulfilledRedemption storage redemption = node.redemptions.fulfilled[index]; /* Update processed count */ processedIndices += 1; processedShares += redemption.shares; if (processedShares <= target) { /* Have not reached the redemption queue position yet */ continue; } else { /* Compute number of shares to redeem in range of this * redemption batch */ uint128 shares = (((processedShares > target + pending) ? pending : (processedShares - target))) - redeemedShares; /* Compute price of shares in this redemption batch */ uint256 price = (redemption.amount * FIXED_POINT_SCALE) / redemption.shares; /* Accumulate redeemed shares and corresponding amount */ redeemedShares += shares; redeemedAmount += Math.mulDiv(shares, price, FIXED_POINT_SCALE).toUint128(); } } } /** * @notice Get deposit share price * @param liquidity Liquidity state * @param tick Tick * @return Deposit share price */ function depositSharePrice(Liquidity storage liquidity, uint128 tick) external view returns (uint256) { Node storage node = liquidity.nodes[tick]; /* Simulate accrual */ uint128 accrued = node.accrual.accrued + node.accrual.rate * uint128(block.timestamp - node.accrual.timestamp); /* Return deposit price */ return node.shares == 0 ? FIXED_POINT_SCALE : (Math.min(node.value + accrued, node.available + node.pending) * FIXED_POINT_SCALE) / node.shares; } /** * @notice Get redemption share price * @param liquidity Liquidity state * @param tick Tick * @return Redemption share price */ function redemptionSharePrice(Liquidity storage liquidity, uint128 tick) external view returns (uint256) { Node storage node = liquidity.nodes[tick]; /* Revert if node is empty */ if (node.value == 0 || node.shares == 0) revert ILiquidity.InactiveLiquidity(); /* Return redemption price */ return (node.value * FIXED_POINT_SCALE) / node.shares; } /**************************************************************************/ /* Internal Helpers */ /**************************************************************************/ /** * @dev Check if tick is reserved * @param tick Tick * @return True if reserved, otherwise false */ function _isReserved(uint128 tick) internal pure returns (bool) { return tick == 0 || tick == type(uint128).max; } /** * @dev Check if liquidity node is empty * @param node Liquidity node * @return True if empty, otherwise false */ function _isEmpty(Node storage node) internal view returns (bool) { return node.shares <= LOCKED_SHARES && node.pending == 0; } /** * @dev Check if liquidity node is active * @param node Liquidity node * @return True if active, otherwise false */ function _isActive(Node storage node) internal view returns (bool) { return node.prev != 0 || node.next != 0; } /** * @dev Check if liquidity node is impaired * @param node Liquidity node * @return True if impaired, otherwise false */ function _isImpaired(Node storage node) internal view returns (bool) { /* If there's shares, but insufficient value for a stable share price */ return node.shares != 0 && node.value * FIXED_POINT_SCALE < node.shares * IMPAIRED_PRICE_THRESHOLD; } /** * @notice Instantiate liquidity * @param liquidity Liquidity state * @param node Liquidity node * @param tick Tick */ function _instantiate(Liquidity storage liquidity, Node storage node, uint128 tick) internal { /* If node is active, do nothing */ if (_isActive(node)) return; /* If node is inactive and not empty, revert */ if (!_isEmpty(node)) revert ILiquidity.InactiveLiquidity(); /* Instantiate previous tick and previous node */ uint128 prevTick; Node storage prevNode = liquidity.nodes[prevTick]; /* Decode limit and limit type from new tick and next tick */ (uint256 newLimit, , , Tick.LimitType newLimitType) = Tick.decode(tick, BASIS_POINTS_SCALE); (uint256 nextLimit, , , Tick.LimitType nextLimitType) = Tick.decode(prevNode.next, BASIS_POINTS_SCALE); /* Find prior node to new tick */ bool isAbsoluteType = newLimitType == Tick.LimitType.Absolute; while (nextLimitType == newLimitType ? nextLimit < newLimit : isAbsoluteType) { prevTick = prevNode.next; prevNode = liquidity.nodes[prevTick]; /* Decode limit and limit type from next tick */ (nextLimit, , , nextLimitType) = Tick.decode(prevNode.next, BASIS_POINTS_SCALE); } /* Decode limit and limit type from prev tick */ (uint256 prevLimit, , , Tick.LimitType prevLimitType) = Tick.decode(prevTick, BASIS_POINTS_SCALE); /* Validate tick limit spacing */ if (isAbsoluteType) { /* Validate new absolute limit */ if ( newLimit != prevLimit && prevLimitType == Tick.LimitType.Absolute && newLimit < (prevLimit * (BASIS_POINTS_SCALE + ABSOLUTE_TICK_LIMIT_SPACING_BASIS_POINTS)) / BASIS_POINTS_SCALE ) revert ILiquidity.InsufficientTickSpacing(); if ( newLimit != nextLimit && nextLimitType == Tick.LimitType.Absolute && nextLimit < (newLimit * (BASIS_POINTS_SCALE + ABSOLUTE_TICK_LIMIT_SPACING_BASIS_POINTS)) / BASIS_POINTS_SCALE ) revert ILiquidity.InsufficientTickSpacing(); } else { /* Validate new ratio limit */ if ( newLimit != prevLimit && prevLimitType == Tick.LimitType.Ratio && newLimit < (prevLimit + RATIO_TICK_LIMIT_SPACING_BASIS_POINTS) ) revert ILiquidity.InsufficientTickSpacing(); if ( newLimit != nextLimit && nextLimitType == Tick.LimitType.Ratio && nextLimit < (newLimit + RATIO_TICK_LIMIT_SPACING_BASIS_POINTS) ) revert ILiquidity.InsufficientTickSpacing(); } /* Link new node */ node.prev = prevTick; node.next = prevNode.next; liquidity.nodes[prevNode.next].prev = tick; prevNode.next = tick; } /** * @dev Garbage collect an impaired or empty node, unlinking it from active * liquidity * @param liquidity Liquidity state * @param node Liquidity node */ function _garbageCollect(Liquidity storage liquidity, Node storage node) internal { /* If node is not impaired and not empty, or already inactive, do nothing */ if ((!_isImpaired(node) && !_isEmpty(node)) || !_isActive(node)) return; /* Make node inactive by unlinking it */ liquidity.nodes[node.prev].next = node.next; liquidity.nodes[node.next].prev = node.prev; node.next = 0; node.prev = 0; } /** * @notice Process redemptions from available liquidity * @param liquidity Liquidity state * @param node Liquidity node */ function _processRedemptions(Liquidity storage liquidity, Node storage node) internal { /* If there's no pending shares to redeem */ if (node.redemptions.pending == 0) return; /* Compute redemption price */ uint256 price = (node.value * FIXED_POINT_SCALE) / node.shares; if (price == 0) { /* If node has pending interest */ if (node.pending != 0) return; /* If node is insolvent, redeem all shares for zero amount */ uint128 shares = node.redemptions.pending; /* Record fulfilled redemption */ node.redemptions.fulfilled[node.redemptions.index++] = FulfilledRedemption({shares: shares, amount: 0}); /* Update node state */ node.shares -= shares; node.value = 0; node.available = 0; node.redemptions.pending = 0; return; } else { /* Node is solvent */ /* If there's no cash to redeem from */ if (node.available == 0) return; /* Redeem as many shares as possible and pending from available cash */ uint128 shares = uint128(Math.min((node.available * FIXED_POINT_SCALE) / price, node.redemptions.pending)); uint128 amount = Math.mulDiv(shares, price, FIXED_POINT_SCALE).toUint128(); /* If there's insufficient cash to redeem non-zero pending shares * at current price */ if (shares == 0) return; /* Record fulfilled redemption */ node.redemptions.fulfilled[node.redemptions.index++] = FulfilledRedemption({ shares: shares, amount: amount }); /* Update node state */ node.shares -= shares; node.value -= amount; node.available -= amount; node.redemptions.pending -= shares; /* Garbage collect node if it is now empty */ _garbageCollect(liquidity, node); return; } } /** * @notice Process accrued value from accrual rate and timestamp * @param node Liquidity node */ function _accrue(Node storage node) internal { node.accrual.accrued += node.accrual.rate * uint128(block.timestamp - node.accrual.timestamp); node.accrual.timestamp = uint64(block.timestamp); } /**************************************************************************/ /* Primary API */ /**************************************************************************/ /** * @notice Initialize liquidity state * @param liquidity Liquidity state */ function initialize(Liquidity storage liquidity) internal { /* Liquidity state defaults to zero, but need to make head and tail nodes */ liquidity.nodes[0].next = type(uint128).max; /* liquidity.nodes[type(uint128).max].prev = 0 by default */ } /** * @notice Deposit liquidity * @param liquidity Liquidity state * @param tick Tick * @param amount Amount * @return Number of shares */ function deposit(Liquidity storage liquidity, uint128 tick, uint128 amount) internal returns (uint128) { Node storage node = liquidity.nodes[tick]; /* If tick is reserved */ if (_isReserved(tick)) revert ILiquidity.InactiveLiquidity(); /* Instantiate node, if necessary */ _instantiate(liquidity, node, tick); /* Process accrual */ _accrue(node); /* Compute deposit price */ uint256 price = node.shares == 0 ? FIXED_POINT_SCALE : (Math.min(node.value + node.accrual.accrued, node.available + node.pending) * FIXED_POINT_SCALE) / node.shares; /* Compute shares and depositor's shares */ uint128 shares = ((amount * FIXED_POINT_SCALE) / price).toUint128(); /* If this is the initial deposit, lock subset of shares */ bool initialDeposit = node.shares < LOCKED_SHARES; node.value += amount; node.shares += shares; node.available += amount; /* Process any pending redemptions from available cash */ _processRedemptions(liquidity, node); return initialDeposit ? shares - LOCKED_SHARES : shares; } /** * @notice Use liquidity from node * @param liquidity Liquidity state * @param tick Tick * @param used Used amount * @param pending Pending amount * @param duration Duration */ function use(Liquidity storage liquidity, uint128 tick, uint128 used, uint128 pending, uint64 duration) internal { Node storage node = liquidity.nodes[tick]; node.available -= used; node.pending += pending; /* Process accrual */ _accrue(node); /* Increment accrual rate */ uint256 rate = uint256(pending - used) / duration; node.accrual.rate += rate.toUint64(); } /** * @notice Restore liquidity and process pending redemptions * @param liquidity Liquidity state * @param tick Tick * @param used Used amount * @param pending Pending amount * @param restored Restored amount * @param duration Duration * @param elapsed Elapsed time since loan origination */ function restore( Liquidity storage liquidity, uint128 tick, uint128 used, uint128 pending, uint128 restored, uint64 duration, uint64 elapsed ) internal { Node storage node = liquidity.nodes[tick]; node.value = node.value - used + restored; node.available += restored; node.pending -= pending; /* Garbage collect node if it is now impaired */ _garbageCollect(liquidity, node); /* Process any pending redemptions */ _processRedemptions(liquidity, node); /* Process accrual */ _accrue(node); /* Decrement accrual rate and accrued */ uint256 rate = uint256(pending - used) / duration; node.accrual.rate -= rate.toUint64(); node.accrual.accrued -= uint128(rate * elapsed); } /** * @notice Redeem liquidity * @param liquidity Liquidity state * @param tick Tick * @param shares Shares * @return Redemption index, Redemption target */ function redeem(Liquidity storage liquidity, uint128 tick, uint128 shares) internal returns (uint128, uint128) { Node storage node = liquidity.nodes[tick]; /* Redemption from inactive liquidity nodes is allowed to facilitate * restoring garbage collected nodes */ /* Snapshot redemption target */ uint128 redemptionIndex = node.redemptions.index; uint128 redemptionTarget = node.redemptions.pending; /* Add shares to pending redemptions */ node.redemptions.pending += shares; /* Initialize redemption record to save gas in loan callbacks */ if (node.redemptions.fulfilled[redemptionIndex].shares != type(uint128).max) { node.redemptions.fulfilled[redemptionIndex] = FulfilledRedemption({shares: type(uint128).max, amount: 0}); } /* Process any pending redemptions from available cash */ _processRedemptions(liquidity, node); return (redemptionIndex, redemptionTarget); } /** * @notice Source liquidity from nodes * @param liquidity Liquidity state * @param amount Amount * @param ticks Ticks to source from * @param multiplier Multiplier for amount * @param durationIndex Duration index for amount * @param oraclePrice Collateral token price from price oracle, if any * @return Sourced liquidity nodes, count of nodes */ function source( Liquidity storage liquidity, uint256 amount, uint128[] calldata ticks, uint256 multiplier, uint256 durationIndex, uint256 oraclePrice ) internal view returns (NodeSource[] memory, uint16) { NodeSource[] memory sources = new NodeSource[](ticks.length); uint128 prevTick; uint256 taken; uint256 count; for (; count < ticks.length && taken != amount; count++) { uint128 tick = ticks[count]; /* Validate tick and decode limit */ uint256 limit = Tick.validate(tick, prevTick, durationIndex, oraclePrice); /* Look up liquidity node */ Node storage node = liquidity.nodes[tick]; /* Consume as much as possible up to the tick limit, amount available, and amount remaining */ uint128 take = uint128(Math.min(Math.min(limit * multiplier - taken, node.available), amount - taken)); /* Record the liquidity allocation in our sources list */ sources[count] = NodeSource({tick: tick, used: take, pending: 0}); taken += take; prevTick = tick; } /* If unable to source required liquidity amount from provided ticks */ if (taken < amount) revert ILiquidity.InsufficientLiquidity(); /* If count exceeds max number of ticks */ if (count > MAX_TICKS_USED_COUNT) revert ILiquidity.InsufficientLiquidity(); return (sources, count.toUint16()); } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; /** * @title LoanReceipt * @author MetaStreet Labs */ library LoanReceipt { /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice Invalid receipt encoding */ error InvalidReceiptEncoding(); /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Loan receipt version */ uint8 internal constant LOAN_RECEIPT_VERSION = 2; /** * @notice Loan receipt header size in bytes * @dev Header excludes borrow options byte array */ uint256 internal constant LOAN_RECEIPT_HEADER_SIZE = 187; /** * @notice Loan receipt node receipt size in bytes */ uint256 internal constant LOAN_RECEIPT_NODE_RECEIPT_SIZE = 48; /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @notice LoanReceiptV2 * @param version Version (2) * @param principal Principal amount in currency tokens * @param repayment Repayment amount in currency tokens * @param adminFee Admin fee amount in currency tokens * @param borrower Borrower * @param maturity Loan maturity timestamp * @param duration Loan duration * @param collateralToken Collateral token * @param collateralTokenId Collateral token ID * @param collateralWrapperContextLen Collateral wrapper context length * @param collateralWrapperContext Collateral wrapper context data * @param nodeReceipts Node receipts */ struct LoanReceiptV2 { uint8 version; uint256 principal; uint256 repayment; uint256 adminFee; address borrower; uint64 maturity; uint64 duration; address collateralToken; uint256 collateralTokenId; uint16 collateralWrapperContextLen; bytes collateralWrapperContext; NodeReceipt[] nodeReceipts; } /** * @notice Node receipt * @param tick Tick * @param used Used amount * @param pending Pending amount */ struct NodeReceipt { uint128 tick; uint128 used; uint128 pending; } /**************************************************************************/ /* Tightly packed format */ /**************************************************************************/ /* Header (187 bytes) 1 uint8 version 0:1 32 uint256 principal 1:33 32 uint256 repayment 33:65 32 uint256 adminFee 65:97 20 address borrower 97:117 8 uint64 maturity 117:125 8 uint64 duration 125:133 20 address collateralToken 133:153 32 uint256 collateralTokenId 153:185 2 uint16 collateralWrapperContextLen 185:187 Collateral Wrapper Context Data (M bytes) 187:--- Node Receipts (48 * N bytes) N NodeReceipts[] nodeReceipts 16 uint128 tick 16 uint128 used 16 uint128 pending */ /**************************************************************************/ /* API */ /**************************************************************************/ /** * @dev Compute loan receipt hash * @param encodedReceipt Encoded loan receipt * @return Loan Receipt hash */ function hash(bytes memory encodedReceipt) internal view returns (bytes32) { /* Take hash of chain ID (32 bytes) concatenated with encoded loan receipt */ return keccak256(abi.encodePacked(block.chainid, encodedReceipt)); } /** * @dev Encode a loan receipt into bytes * @param receipt Loan Receipt * @return Encoded loan receipt */ function encode(LoanReceiptV2 memory receipt) internal pure returns (bytes memory) { /* Encode header */ bytes memory header = abi.encodePacked( receipt.version, receipt.principal, receipt.repayment, receipt.adminFee, receipt.borrower, receipt.maturity, receipt.duration, receipt.collateralToken, receipt.collateralTokenId, receipt.collateralWrapperContextLen, receipt.collateralWrapperContext ); /* Encode node receipts */ bytes memory nodeReceipts; for (uint256 i; i < receipt.nodeReceipts.length; i++) { nodeReceipts = abi.encodePacked( nodeReceipts, receipt.nodeReceipts[i].tick, receipt.nodeReceipts[i].used, receipt.nodeReceipts[i].pending ); } return abi.encodePacked(header, nodeReceipts); } /** * @dev Decode a loan receipt from bytes * @param encodedReceipt Encoded loan Receipt * @return Decoded loan receipt */ function decode(bytes calldata encodedReceipt) internal pure returns (LoanReceiptV2 memory) { /* Validate encoded receipt length */ if (encodedReceipt.length < LOAN_RECEIPT_HEADER_SIZE) revert InvalidReceiptEncoding(); uint256 collateralWrapperContextLen = uint16(bytes2(encodedReceipt[185:187])); /* Validate length with collateral wrapper context */ if (encodedReceipt.length < LOAN_RECEIPT_HEADER_SIZE + collateralWrapperContextLen) revert InvalidReceiptEncoding(); /* Validate length with node receipts */ if ( (encodedReceipt.length - LOAN_RECEIPT_HEADER_SIZE - collateralWrapperContextLen) % LOAN_RECEIPT_NODE_RECEIPT_SIZE != 0 ) revert InvalidReceiptEncoding(); /* Validate encoded receipt version */ if (uint8(encodedReceipt[0]) != LOAN_RECEIPT_VERSION) revert InvalidReceiptEncoding(); LoanReceiptV2 memory receipt; /* Decode header */ receipt.version = uint8(encodedReceipt[0]); receipt.principal = uint256(bytes32(encodedReceipt[1:33])); receipt.repayment = uint256(bytes32(encodedReceipt[33:65])); receipt.adminFee = uint256(bytes32(encodedReceipt[65:97])); receipt.borrower = address(uint160(bytes20(encodedReceipt[97:117]))); receipt.maturity = uint64(bytes8(encodedReceipt[117:125])); receipt.duration = uint64(bytes8(encodedReceipt[125:133])); receipt.collateralToken = address(uint160(bytes20(encodedReceipt[133:153]))); receipt.collateralTokenId = uint256(bytes32(encodedReceipt[153:185])); receipt.collateralWrapperContextLen = uint16(collateralWrapperContextLen); receipt.collateralWrapperContext = encodedReceipt[187:187 + collateralWrapperContextLen]; /* Decode node receipts */ uint256 numNodeReceipts = (encodedReceipt.length - LOAN_RECEIPT_HEADER_SIZE - collateralWrapperContextLen) / LOAN_RECEIPT_NODE_RECEIPT_SIZE; receipt.nodeReceipts = new NodeReceipt[](numNodeReceipts); uint256 offset = LOAN_RECEIPT_HEADER_SIZE + collateralWrapperContextLen; for (uint256 i; i < numNodeReceipts; i++) { receipt.nodeReceipts[i].tick = uint128(bytes16(encodedReceipt[offset:offset + 16])); receipt.nodeReceipts[i].used = uint128(bytes16(encodedReceipt[offset + 16:offset + 32])); receipt.nodeReceipts[i].pending = uint128(bytes16(encodedReceipt[offset + 32:offset + 48])); offset += LOAN_RECEIPT_NODE_RECEIPT_SIZE; } return receipt; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "./PriceOracle.sol"; import "../interfaces/IPriceOracle.sol"; /** * @title External Price Oracle * @author MetaStreet Labs */ contract ExternalPriceOracle is PriceOracle { /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @custom:storage-location erc7201:externalPriceOracle.priceOracleStorage * @param addr Price oracle address */ struct PriceOracleStorage { address addr; } /**************************************************************************/ /* State */ /**************************************************************************/ /** * @notice Price oracle storage slot * @dev keccak256(abi.encode(uint256(keccak256("externalPriceOracle.priceOracleStorage")) - 1)) & ~bytes32(uint256(0xff)); */ bytes32 private constant PRICE_ORACLE_LOCATION = 0x5cc3a0ef4fb602d81e01a142e768b704108e3b2e96852939d75763e011a39b00; /**************************************************************************/ /* Initializer */ /**************************************************************************/ /** * @notice ExternalPriceOracle initializer */ function __initialize(address addr) internal { _getPriceOracleStorage().addr = addr; } /**************************************************************************/ /* Internal Helpers */ /**************************************************************************/ /** * @notice Get reference to ERC-7201 price oracle address storage * * @return $ Reference to price oracle address storage */ function _getPriceOracleStorage() private pure returns (PriceOracleStorage storage $) { assembly { $.slot := PRICE_ORACLE_LOCATION } } /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Get price oracle address * * @return Price oracle address */ function priceOracle() public view returns (address) { return _getPriceOracleStorage().addr; } /** * @inheritdoc PriceOracle */ function price( address collateralToken, address currencyToken, uint256[] memory tokenIds, uint256[] memory tokenIdQuantities, bytes calldata oracleContext ) public view override returns (uint256) { /* Cache price oracle address */ address priceOracle_ = priceOracle(); /* Return oracle price if price oracle exists, else 0 */ return priceOracle_ != address(0) ? IPriceOracle(priceOracle_).price( collateralToken, currencyToken, tokenIds, tokenIdQuantities, oracleContext ) : 0; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; /** * @title Price oracle API * @author MetaStreet Labs */ abstract contract PriceOracle { /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Fetch price of token IDs * @param collateralToken Collateral token * @param currencyToken Currency token * @param tokenIds Token IDs * @param tokenIdQuantities Token ID quantities * @param oracleContext Oracle context * @return Token price in the same decimals as currency token */ function price( address collateralToken, address currencyToken, uint256[] memory tokenIds, uint256[] memory tokenIdQuantities, bytes calldata oracleContext ) public view virtual returns (uint256); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "@openzeppelin/contracts/utils/Multicall.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "./filters/CollateralFilter.sol"; import "./rates/InterestRateModel.sol"; import "./tokenization/DepositToken.sol"; import "./LoanReceipt.sol"; import "./LiquidityLogic.sol"; import "./DepositLogic.sol"; import "./BorrowLogic.sol"; import "./oracle/PriceOracle.sol"; import "./interfaces/IPool.sol"; import "./interfaces/ILiquidity.sol"; import "./interfaces/ICollateralWrapper.sol"; import "./interfaces/ICollateralLiquidator.sol"; import "./interfaces/ICollateralLiquidationReceiver.sol"; /** * @title Pool * @author MetaStreet Labs */ abstract contract Pool is ERC165, ReentrancyGuard, Multicall, CollateralFilter, InterestRateModel, DepositToken, PriceOracle, IPool, ILiquidity, ICollateralLiquidationReceiver { using SafeCast for uint256; using SafeERC20 for IERC20; using LiquidityLogic for LiquidityLogic.Liquidity; /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Tick spacing basis points for absolute type */ uint256 public constant ABSOLUTE_TICK_LIMIT_SPACING_BASIS_POINTS = LiquidityLogic.ABSOLUTE_TICK_LIMIT_SPACING_BASIS_POINTS; /** * @notice Tick spacing basis points for ratio type */ uint256 public constant RATIO_TICK_LIMIT_SPACING_BASIS_POINTS = LiquidityLogic.RATIO_TICK_LIMIT_SPACING_BASIS_POINTS; /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @notice Redemption * @param pending Redemption shares pending * @param index Redemption queue index * @param target Redemption queue target */ struct Redemption { uint128 pending; uint128 index; uint128 target; } /** * @notice Deposit * @param shares Shares * @param redemptionId Next Redemption ID * @param redemptions Mapping of redemption ID to redemption */ struct Deposit { uint128 shares; uint128 redemptionId; mapping(uint128 => Redemption) redemptions; } /** * @notice Delegate * @param version Delegate version * @param to Delegate address */ struct Delegate { DelegateVersion version; address to; } /** * @custom:storage-location erc7201:pool.delegateStorage */ struct DelegateStorage { /* Mapping of collateralToken to token ID to Delegate */ mapping(address => mapping(uint256 => Delegate)) delegates; } /** * @notice Loan status */ enum LoanStatus { Uninitialized, Active, Repaid, Liquidated, CollateralLiquidated } /** * @notice Borrow function options */ enum BorrowOptions { None, CollateralWrapperContext, CollateralFilterContext, DelegateCashV1, DelegateCashV2, OracleContext } /** * @notice Delegate version */ enum DelegateVersion { None, DelegateCashV1, DelegateCashV2 } /**************************************************************************/ /* Immutable State */ /**************************************************************************/ /** * @notice Collateral wrappers (max 3) */ address internal immutable _collateralWrapper1; address internal immutable _collateralWrapper2; address internal immutable _collateralWrapper3; /** * @notice Collateral liquidator */ ICollateralLiquidator internal immutable _collateralLiquidator; /** * @notice Delegate registry v1 contract */ address internal immutable _delegateRegistryV1; /** * @notice Delegate registry v2 contract */ address internal immutable _delegateRegistryV2; /** * @notice Delegate cash storage slot * @dev keccak256(abi.encode(uint256(keccak256("erc7201:pool.delegateStorage")) - 1)) & ~bytes32(uint256(0xff)); * @dev Erroneous inclusion of "erc7201" in the above namespace ID. No intention to fix. */ bytes32 internal constant DELEGATE_STORAGE_LOCATION = 0xf0e5094ebd597f2042580340ce53d1b15e5b64e0d8be717ecde51dd37c619300; /**************************************************************************/ /* State */ /**************************************************************************/ /** * @notice Pool Storage * @param currencyToken Currency token contract * @param adminFeeRate Admin free rate in basis points * @param durations Durations * @param rates Rates * @param admin Admin * @param adminFeeBalance Admin fee balance * @param liquidity Liquidity * @param deposits Mapping of account to tick to deposit * @param loans Mapping of loan receipt hash to loan status */ struct PoolStorage { IERC20 currencyToken; uint32 adminFeeRate; uint64[] durations; uint64[] rates; address admin; uint256 adminFeeBalance; LiquidityLogic.Liquidity liquidity; mapping(address => mapping(uint128 => Deposit)) deposits; mapping(bytes32 => LoanStatus) loans; } /** * @notice Pool state */ PoolStorage internal _storage; /**************************************************************************/ /* Constructor */ /**************************************************************************/ /** * @notice Pool constructor * @param collateralLiquidator_ Collateral liquidator * @param delegateRegistryV1_ Delegate registry v1 contract * @param delegateRegistryV2_ Delegate registry v2 contract * @param collateralWrappers_ Collateral wrappers */ constructor( address collateralLiquidator_, address delegateRegistryV1_, address delegateRegistryV2_, address[] memory collateralWrappers_ ) { if (collateralWrappers_.length > 3) revert InvalidParameters(); _collateralLiquidator = ICollateralLiquidator(collateralLiquidator_); _delegateRegistryV1 = delegateRegistryV1_; _delegateRegistryV2 = delegateRegistryV2_; _collateralWrapper1 = (collateralWrappers_.length > 0) ? collateralWrappers_[0] : address(0); _collateralWrapper2 = (collateralWrappers_.length > 1) ? collateralWrappers_[1] : address(0); _collateralWrapper3 = (collateralWrappers_.length > 2) ? collateralWrappers_[2] : address(0); } /**************************************************************************/ /* Initializer */ /**************************************************************************/ /** * @notice Pool initializer * @dev Fee-on-transfer currency tokens are not supported * @param currencyToken_ Currency token contract * @param durations_ Duration tiers * @param rates_ Interest rate tiers */ function _initialize(address currencyToken_, uint64[] memory durations_, uint64[] memory rates_) internal { if (IERC20Metadata(currencyToken_).decimals() > 18) revert InvalidParameters(); _storage.currencyToken = IERC20(currencyToken_); _storage.admin = msg.sender; /* Assign durations */ if (durations_.length > Tick.MAX_NUM_DURATIONS) revert InvalidParameters(); for (uint256 i; i < durations_.length; i++) { /* Check duration is monotonic */ if (i != 0 && durations_[i] >= durations_[i - 1]) revert InvalidParameters(); _storage.durations.push(durations_[i]); } /* Assign rates */ if (rates_.length > Tick.MAX_NUM_RATES) revert InvalidParameters(); for (uint256 i; i < rates_.length; i++) { /* Check rate is monotonic */ if (i != 0 && rates_[i] <= rates_[i - 1]) revert InvalidParameters(); _storage.rates.push(rates_[i]); } /* Initialize liquidity */ _storage.liquidity.initialize(); } /**************************************************************************/ /* Getters */ /**************************************************************************/ /** * @notice Get implementation name * @return Implementation name */ function IMPLEMENTATION_NAME() external pure virtual returns (string memory); /** * @notice Get implementation version * @return Implementation version */ function IMPLEMENTATION_VERSION() external pure returns (string memory) { return "2.11"; } /** * @inheritdoc IPool */ function currencyToken() external view returns (address) { return address(_storage.currencyToken); } /** * @inheritdoc IPool */ function durations() external view returns (uint64[] memory) { return _storage.durations; } /** * @inheritdoc IPool */ function rates() external view returns (uint64[] memory) { return _storage.rates; } /** * @inheritdoc IPool */ function admin() external view returns (address) { return _storage.admin; } /** * @inheritdoc IPool */ function adminFeeRate() external view returns (uint32) { return _storage.adminFeeRate; } /** * @inheritdoc IPool */ function adminFeeBalance() external view returns (uint256) { return _unscale(_storage.adminFeeBalance, false); } /** * @inheritdoc IPool */ function collateralWrappers() external view returns (address[] memory) { address[] memory collateralWrappers_ = new address[](3); collateralWrappers_[0] = _collateralWrapper1; collateralWrappers_[1] = _collateralWrapper2; collateralWrappers_[2] = _collateralWrapper3; return collateralWrappers_; } /** * @inheritdoc IPool */ function collateralLiquidator() external view returns (address) { return address(_collateralLiquidator); } /** * @inheritdoc IPool */ function delegationRegistry() external view returns (address) { return address(_delegateRegistryV1); } /** * @inheritdoc IPool */ function delegationRegistryV2() external view returns (address) { return address(_delegateRegistryV2); } /** * @notice Get deposit * @param account Account * @param tick Tick * @return shares Shares * @return redemptionId Redemption ID */ function deposits(address account, uint128 tick) external view returns (uint128 shares, uint128 redemptionId) { shares = _storage.deposits[account][tick].shares; redemptionId = _storage.deposits[account][tick].redemptionId; } /** * @notice Get redemption * @param account Account * @param tick Tick * @param redemptionId Redemption ID * @return Redemption */ function redemptions( address account, uint128 tick, uint128 redemptionId ) external view returns (Redemption memory) { return _storage.deposits[account][tick].redemptions[redemptionId]; } /** * @notice Get loan status * @param receiptHash Loan receipt hash * @return Loan status */ function loans(bytes32 receiptHash) external view returns (LoanStatus) { return _storage.loans[receiptHash]; } /** * @inheritdoc ILiquidity */ function liquidityNodes(uint128 startTick, uint128 endTick) external view returns (NodeInfo[] memory) { return _storage.liquidity.liquidityNodes(startTick, endTick); } /** * @inheritdoc ILiquidity */ function liquidityNode(uint128 tick) external view returns (NodeInfo memory) { return _storage.liquidity.liquidityNode(tick); } /** * @inheritdoc ILiquidity */ function liquidityNodeWithAccrual(uint128 tick) external view returns (NodeInfo memory, AccrualInfo memory) { return _storage.liquidity.liquidityNodeWithAccrual(tick); } /** * @inheritdoc ILiquidity */ function depositSharePrice(uint128 tick) external view returns (uint256) { return _unscale(_storage.liquidity.depositSharePrice(tick), false); } /** * @inheritdoc ILiquidity */ function redemptionSharePrice(uint128 tick) external view returns (uint256) { return _unscale(_storage.liquidity.redemptionSharePrice(tick), false); } /**************************************************************************/ /* Loan Receipt External Helpers */ /**************************************************************************/ /** * @notice Decode loan receipt * @param loanReceipt Loan receipt * @return Decoded loan receipt */ function decodeLoanReceipt(bytes calldata loanReceipt) external pure returns (LoanReceipt.LoanReceiptV2 memory) { return BorrowLogic._decodeLoanReceipt(loanReceipt); } /**************************************************************************/ /* Helper Functions */ /**************************************************************************/ /** * @notice Helper function that returns underlying collateral in (address, * uint256[], uint256) shape * @param collateralToken Collateral token, either underlying token or collateral wrapper * @param collateralTokenId Collateral token ID * @param collateralWrapperContext Collateral wrapper context * @return token Underlying collateral token * @return tokenIds Underlying collateral token IDs (unique) * @return tokenIdQuantities Underlying collateral token ID quantities * @return tokenCount Underlying total token count */ function _getUnderlyingCollateral( address collateralToken, uint256 collateralTokenId, bytes memory collateralWrapperContext ) internal view returns (address token, uint256[] memory tokenIds, uint256[] memory tokenIdQuantities, uint256 tokenCount) { /* Enumerate if collateral token is a collateral wrapper */ if ( collateralToken == _collateralWrapper1 || collateralToken == _collateralWrapper2 || collateralToken == _collateralWrapper3 ) { (token, tokenIds, tokenIdQuantities) = ICollateralWrapper(collateralToken).enumerateWithQuantities( collateralTokenId, collateralWrapperContext ); tokenCount = ICollateralWrapper(collateralToken).count(collateralTokenId, collateralWrapperContext); return (token, tokenIds, tokenIdQuantities, tokenCount); } /* If single asset, convert to length one token ID array */ token = collateralToken; tokenIds = new uint256[](1); tokenIds[0] = collateralTokenId; tokenIdQuantities = new uint256[](1); tokenIdQuantities[0] = 1; tokenCount = 1; } /** * @notice Get reference to ERC-7201 delegate storage * @return $ Reference to delegate storage */ function _getDelegateStorage() private pure returns (DelegateStorage storage $) { assembly { $.slot := DELEGATE_STORAGE_LOCATION } } /** * @dev Helper function to quote a loan * @param principal Principal amount in currency tokens * @param duration Duration in seconds * @param collateralToken_ Collateral token address * @param collateralTokenId Collateral token ID * @param ticks Liquidity node ticks * @param collateralWrapperContext Collateral wrapper context * @param collateralFilterContext Collateral filter context * @param oracleContext Oracle context * @param isRefinance True if called by refinance() * @return Repayment amount in currency tokens, admin fee in currency * tokens, liquidity nodes, liquidity node count */ function _quote( uint256 principal, uint64 duration, address collateralToken_, uint256 collateralTokenId, uint128[] calldata ticks, bytes memory collateralWrapperContext, bytes calldata collateralFilterContext, bytes calldata oracleContext, bool isRefinance ) internal view returns (uint256, uint256, LiquidityLogic.NodeSource[] memory, uint16) { /* Get underlying collateral */ ( address underlyingCollateralToken, uint256[] memory underlyingCollateralTokenIds, uint256[] memory underlyingQuantities, uint256 underlyingCollateralTokenCount ) = _getUnderlyingCollateral(collateralToken_, collateralTokenId, collateralWrapperContext); /* Verify collateral is supported */ if (!isRefinance) { for (uint256 i; i < underlyingCollateralTokenIds.length; i++) { if ( !_collateralSupported( underlyingCollateralToken, underlyingCollateralTokenIds[i], i, collateralFilterContext ) ) revert UnsupportedCollateral(i); } } /* Cache durations */ uint64[] memory durations_ = _storage.durations; /* Validate duration */ if (duration > durations_[0]) revert UnsupportedLoanDuration(); /* Lookup duration index */ uint256 durationIndex = durations_.length - 1; for (; durationIndex > 0; durationIndex--) { if (duration <= durations_[durationIndex]) break; } /* Get oracle price if price oracle exists, else 0 */ uint256 oraclePrice = price( collateralToken(), address(_storage.currencyToken), underlyingCollateralTokenIds, underlyingQuantities, oracleContext ); /* Source liquidity nodes */ (LiquidityLogic.NodeSource[] memory nodes, uint16 count) = _storage.liquidity.source( principal, ticks, underlyingCollateralTokenCount, durationIndex, _scale(oraclePrice) ); /* Price interest for liquidity nodes */ (uint256 repayment, uint256 adminFee) = _price( principal, duration, nodes, count, _storage.rates, _storage.adminFeeRate ); return (repayment, adminFee, nodes, count); } /** * @dev Helper function to get currency token scaling factor * @return Factor */ function _scaleFactor() internal view returns (uint256) { return 10 ** (18 - IERC20Metadata(address(_storage.currencyToken)).decimals()); } /** * @dev Helper function to scale up a value * @param value Value * @return Scaled value */ function _scale(uint256 value) internal view returns (uint256) { return value * _scaleFactor(); } /** * @dev Helper function to scale down a value * @param value Value * @param isRoundUp Round up if true * @return Unscaled value */ function _unscale(uint256 value, bool isRoundUp) internal view returns (uint256) { uint256 factor = _scaleFactor(); return (value % factor == 0 || !isRoundUp) ? value / factor : value / factor + 1; } /**************************************************************************/ /* Lend API */ /**************************************************************************/ /** * @inheritdoc IPool */ function quote( uint256 principal, uint64 duration, address collateralToken, uint256 collateralTokenId, uint128[] calldata ticks, bytes calldata options ) external view returns (uint256) { /* Quote repayment */ (uint256 repayment, , , ) = _quote( _scale(principal), duration, collateralToken, collateralTokenId, ticks, BorrowLogic._getOptionsData(options, BorrowOptions.CollateralWrapperContext), BorrowLogic._getOptionsData(options, BorrowOptions.CollateralFilterContext), BorrowLogic._getOptionsData(options, BorrowOptions.OracleContext), false ); return _unscale(repayment, true); } /** * @inheritdoc IPool */ function borrow( uint256 principal, uint64 duration, address collateralToken, uint256 collateralTokenId, uint256 maxRepayment, uint128[] calldata ticks, bytes calldata options ) external nonReentrant returns (uint256) { uint256 scaledPrincipal = _scale(principal); /* Quote repayment, admin fee, and liquidity nodes */ (uint256 repayment, uint256 adminFee, LiquidityLogic.NodeSource[] memory nodes, uint16 count) = _quote( scaledPrincipal, duration, collateralToken, collateralTokenId, ticks, BorrowLogic._getOptionsData(options, BorrowOptions.CollateralWrapperContext), BorrowLogic._getOptionsData(options, BorrowOptions.CollateralFilterContext), BorrowLogic._getOptionsData(options, BorrowOptions.OracleContext), false ); /* Handle borrow accounting */ (bytes memory encodedLoanReceipt, bytes32 loanReceiptHash) = BorrowLogic._borrow( _storage, scaledPrincipal, duration, collateralToken, collateralTokenId, repayment, _scale(maxRepayment), adminFee, nodes, count, BorrowLogic._getOptionsData(options, BorrowOptions.CollateralWrapperContext) ); /* Handle delegate.cash option */ BorrowLogic._optionDelegateCash( _getDelegateStorage(), collateralToken, collateralTokenId, _delegateRegistryV1, _delegateRegistryV2, options ); /* Transfer collateral from borrower to pool */ IERC721(collateralToken).transferFrom(msg.sender, address(this), collateralTokenId); /* Transfer principal from pool to borrower */ _storage.currencyToken.safeTransfer(msg.sender, principal); /* Emit LoanOriginated */ emit LoanOriginated(loanReceiptHash, encodedLoanReceipt); return _unscale(repayment, true); } /** * @inheritdoc IPool */ function repay(bytes calldata encodedLoanReceipt) external nonReentrant returns (uint256) { /* Handle repay accounting */ (uint256 repayment, LoanReceipt.LoanReceiptV2 memory loanReceipt, bytes32 loanReceiptHash) = BorrowLogic._repay( _storage, encodedLoanReceipt ); uint256 unscaledRepayment = _unscale(repayment, true); /* Revoke delegates */ BorrowLogic._revokeDelegates( _getDelegateStorage(), loanReceipt.collateralToken, loanReceipt.collateralTokenId, _delegateRegistryV1, _delegateRegistryV2 ); /* Transfer repayment from borrower to pool */ _storage.currencyToken.safeTransferFrom(loanReceipt.borrower, address(this), unscaledRepayment); /* Transfer collateral from pool to borrower */ IERC721(loanReceipt.collateralToken).transferFrom( address(this), loanReceipt.borrower, loanReceipt.collateralTokenId ); /* Emit Loan Repaid */ emit LoanRepaid(loanReceiptHash, unscaledRepayment); return unscaledRepayment; } /** * @inheritdoc IPool */ function refinance( bytes calldata encodedLoanReceipt, uint256 principal, uint64 duration, uint256 maxRepayment, uint128[] calldata ticks, bytes calldata options ) external nonReentrant returns (uint256) { uint256 scaledPrincipal = _scale(principal); /* Handle repay accounting */ (uint256 repayment, LoanReceipt.LoanReceiptV2 memory loanReceipt, bytes32 loanReceiptHash) = BorrowLogic._repay( _storage, encodedLoanReceipt ); uint256 unscaledRepayment = _unscale(repayment, true); /* Quote new repayment, admin fee, and liquidity nodes */ (uint256 newRepayment, uint256 adminFee, LiquidityLogic.NodeSource[] memory nodes, uint16 count) = _quote( scaledPrincipal, duration, loanReceipt.collateralToken, loanReceipt.collateralTokenId, ticks, loanReceipt.collateralWrapperContext, encodedLoanReceipt[0:0], BorrowLogic._getOptionsData(options, BorrowOptions.OracleContext), true ); /* Handle borrow accounting */ (bytes memory newEncodedLoanReceipt, bytes32 newLoanReceiptHash) = BorrowLogic._borrow( _storage, scaledPrincipal, duration, loanReceipt.collateralToken, loanReceipt.collateralTokenId, newRepayment, _scale(maxRepayment), adminFee, nodes, count, loanReceipt.collateralWrapperContext ); /* Determine transfer direction */ if (principal < unscaledRepayment) { /* Transfer prorated repayment less principal from borrower to pool */ _storage.currencyToken.safeTransferFrom(loanReceipt.borrower, address(this), unscaledRepayment - principal); } else { /* Transfer principal less prorated repayment from pool to borrower */ _storage.currencyToken.safeTransfer(msg.sender, principal - unscaledRepayment); } /* Emit Loan Repaid */ emit LoanRepaid(loanReceiptHash, unscaledRepayment); /* Emit LoanOriginated */ emit LoanOriginated(newLoanReceiptHash, newEncodedLoanReceipt); return _unscale(newRepayment, true); } /** * @inheritdoc IPool */ function liquidate(bytes calldata encodedLoanReceipt) external nonReentrant { /* Handle liquidate accounting */ (LoanReceipt.LoanReceiptV2 memory loanReceipt, bytes32 loanReceiptHash) = BorrowLogic._liquidate( _storage, encodedLoanReceipt ); /* Revoke delegates */ BorrowLogic._revokeDelegates( _getDelegateStorage(), loanReceipt.collateralToken, loanReceipt.collateralTokenId, _delegateRegistryV1, _delegateRegistryV2 ); /* Approve collateral for transfer to _collateralLiquidator */ IERC721(loanReceipt.collateralToken).approve(address(_collateralLiquidator), loanReceipt.collateralTokenId); /* Start liquidation with collateral liquidator */ _collateralLiquidator.liquidate( address(_storage.currencyToken), loanReceipt.collateralToken, loanReceipt.collateralTokenId, loanReceipt.collateralWrapperContext, encodedLoanReceipt ); /* Emit Loan Liquidated */ emit LoanLiquidated(loanReceiptHash); } /**************************************************************************/ /* Callbacks */ /**************************************************************************/ /** * @inheritdoc ICollateralLiquidationReceiver */ function onCollateralLiquidated(bytes calldata encodedLoanReceipt, uint256 proceeds) external nonReentrant { /* Validate caller is collateral liquidator */ if (msg.sender != address(_collateralLiquidator)) revert InvalidCaller(); /* Handle collateral liquidation accounting */ (uint256 borrowerSurplus, LoanReceipt.LoanReceiptV2 memory loanReceipt, bytes32 loanReceiptHash) = BorrowLogic ._onCollateralLiquidated(_storage, encodedLoanReceipt, _scale(proceeds)); uint256 unscaledBorrowerSurplus = _unscale(borrowerSurplus, false); /* Transfer surplus to borrower */ if (unscaledBorrowerSurplus != 0) IERC20(_storage.currencyToken).safeTransfer(loanReceipt.borrower, unscaledBorrowerSurplus); /* Emit Collateral Liquidated */ emit CollateralLiquidated(loanReceiptHash, proceeds, unscaledBorrowerSurplus); } /**************************************************************************/ /* Deposit API */ /**************************************************************************/ /** * @inheritdoc IPool */ function deposit(uint128 tick, uint256 amount, uint256 minShares) external nonReentrant returns (uint256) { /* Handle deposit accounting and compute shares */ uint128 shares = DepositLogic._deposit(_storage, tick, _scale(amount).toUint128(), minShares.toUint128()); /* Call token hook */ _onExternalTransfer(address(0), msg.sender, tick, shares); /* Transfer deposit amount */ _storage.currencyToken.safeTransferFrom(msg.sender, address(this), amount); /* Emit Deposited */ emit Deposited(msg.sender, tick, amount, shares); return shares; } /** * @inheritdoc IPool */ function redeem(uint128 tick, uint256 shares) external nonReentrant returns (uint128) { /* Handle redeem accounting */ uint128 redemptionId = DepositLogic._redeem(_storage, tick, shares.toUint128()); /* Call token hook */ _onExternalTransfer(msg.sender, address(0), tick, shares); /* Emit Redeemed event */ emit Redeemed(msg.sender, tick, redemptionId, shares); return redemptionId; } /** * @inheritdoc IPool */ function redemptionAvailable( address account, uint128 tick, uint128 redemptionId ) external view returns (uint256, uint256, uint256) { /* Handle redemption available accounting */ (uint256 shares, uint256 amount, uint256 sharesAhead) = DepositLogic._redemptionAvailable( _storage, account, tick, redemptionId ); return (shares, _unscale(amount, false), sharesAhead); } /** * @inheritdoc IPool */ function withdraw(uint128 tick, uint128 redemptionId) external nonReentrant returns (uint256, uint256) { /* Handle withdraw accounting and compute both shares and amount */ (uint128 shares, uint128 amount) = DepositLogic._withdraw(_storage, tick, redemptionId); uint256 unscaledAmount = _unscale(amount, false); /* Transfer withdrawal amount */ if (unscaledAmount != 0) _storage.currencyToken.safeTransfer(msg.sender, unscaledAmount); /* Emit Withdrawn */ emit Withdrawn(msg.sender, tick, redemptionId, shares, unscaledAmount); return (shares, unscaledAmount); } /** * @inheritdoc IPool */ function rebalance( uint128 srcTick, uint128 dstTick, uint128 redemptionId, uint256 minShares ) external nonReentrant returns (uint256, uint256, uint256) { /* Handle withdraw accounting and compute both shares and amount */ (uint128 oldShares, uint128 amount) = DepositLogic._withdraw(_storage, srcTick, redemptionId); /* Handle deposit accounting and compute new shares */ uint128 newShares = DepositLogic._deposit(_storage, dstTick, amount, minShares.toUint128()); uint256 unscaledAmount = _unscale(amount, false); /* Call token hook */ _onExternalTransfer(address(0), msg.sender, dstTick, newShares); /* Emit Withdrawn */ emit Withdrawn(msg.sender, srcTick, redemptionId, oldShares, unscaledAmount); /* Emit Deposited */ emit Deposited(msg.sender, dstTick, unscaledAmount, newShares); return (oldShares, newShares, unscaledAmount); } /** * @notice Transfer shares between accounts by operator * * @dev Only callable by deposit token contract * * @param from From * @param to To * @param tick Tick * @param shares Shares */ function transfer(address from, address to, uint128 tick, uint256 shares) external nonReentrant { /* Validate caller is deposit token created by Pool */ if (msg.sender != depositToken(tick)) revert InvalidCaller(); /* Handle transfer accounting */ DepositLogic._transfer(_storage, from, to, tick, shares.toUint128()); /* Emit Transferred */ emit Transferred(from, to, tick, shares); } /** * @notice Tokenize a tick * * @param tick Tick * @return Deposit token address */ function tokenize(uint128 tick) external returns (address) { /* Validate tick */ Tick.validate(tick, 0, 0, _storage.durations.length - 1, 0, _storage.rates.length - 1); return _tokenize(tick); } /**************************************************************************/ /* Admin Fees API */ /**************************************************************************/ /** * @notice Set the admin fee rate * * Emits a {AdminFeeRateUpdated} event. * * @param rate Rate is the admin fee in basis points */ function setAdminFeeRate(uint32 rate) external { BorrowLogic._setAdminFeeRate(_storage, rate); emit AdminFeeRateUpdated(rate); } /** * @notice Withdraw admin fees * * Emits a {AdminFeesWithdrawn} event. * * @param recipient Recipient account * @param amount Amount to withdraw */ function withdrawAdminFees(address recipient, uint256 amount) external nonReentrant { BorrowLogic._withdrawAdminFees(_storage, recipient, _scale(amount)); /* Transfer cash from Pool to recipient */ _storage.currencyToken.safeTransfer(recipient, amount); emit AdminFeesWithdrawn(recipient, amount); } /******************************************************/ /* ERC165 interface */ /******************************************************/ /** * @inheritdoc IERC165 */ function supportsInterface(bytes4 interfaceId) public view override returns (bool) { return interfaceId == type(ICollateralLiquidationReceiver).interfaceId || super.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../LiquidityLogic.sol"; /** * @title Interest Rate Model API * @author MetaStreet Labs */ abstract contract InterestRateModel { /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice Invalid parameters */ error InvalidInterestRateModelParameters(); /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Get interest rate model name * @return Interest rate model name */ function INTEREST_RATE_MODEL_NAME() external view virtual returns (string memory); /** * @notice Get interest rate model version * @return Interest rate model version */ function INTEREST_RATE_MODEL_VERSION() external view virtual returns (string memory); /** * @notice Price interest for liquidity * @param principal Principal * @param duration Duration * @param nodes Liquidity nodes * @param count Liquidity node count * @param rates Interest rates * @param adminFeeRate Admin fee rate * @return repayment Repayment * @return adminFee Admin fee */ function _price( uint256 principal, uint64 duration, LiquidityLogic.NodeSource[] memory nodes, uint16 count, uint64[] memory rates, uint32 adminFeeRate ) internal view virtual returns (uint256 repayment, uint256 adminFee); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/utils/math/Math.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "./InterestRateModel.sol"; import "../Tick.sol"; /** * @title Weighted Interest Rate Model * @author MetaStreet Labs */ contract WeightedInterestRateModel is InterestRateModel { using SafeCast for uint256; /**************************************************************************/ /* Constructor */ /**************************************************************************/ /** * @notice WeightedInterestRateModel constructor */ constructor() {} /**************************************************************************/ /* Implementation */ /**************************************************************************/ /** * @inheritdoc InterestRateModel */ function INTEREST_RATE_MODEL_NAME() external pure override returns (string memory) { return "WeightedInterestRateModel"; } /** * @inheritdoc InterestRateModel */ function INTEREST_RATE_MODEL_VERSION() external pure override returns (string memory) { return "2.0"; } /** * @inheritdoc InterestRateModel */ function _price( uint256 principal, uint64 duration, LiquidityLogic.NodeSource[] memory nodes, uint16 count, uint64[] memory rates, uint32 adminFeeRate ) internal pure override returns (uint256, uint256) { /* First pass to compute repayment and weights */ uint256[] memory weights = new uint256[](count); uint256 repayment; uint256 normalization; for (uint256 i; i < count; i++) { /* Compute tick repayment */ (, , uint256 rateIndex, ) = Tick.decode(nodes[i].tick, LiquidityLogic.BASIS_POINTS_SCALE); uint256 pending = nodes[i].used + Math.mulDiv(nodes[i].used, rates[rateIndex] * duration, LiquidityLogic.FIXED_POINT_SCALE); /* Update cumulative repayment */ repayment += pending; /* Compute tick weight */ weights[i] = Math.mulDiv(repayment, pending, principal); /* Accumulate weight for normalization */ normalization += weights[i]; } /* Compute interest and admin fee */ uint256 interest = repayment - principal; uint256 adminFee = (interest * adminFeeRate) / LiquidityLogic.BASIS_POINTS_SCALE; /* Deduct admin fee from interest */ interest -= adminFee; /* Second pass to assign weighted interest to ticks */ uint256 interestRemaining = interest; for (uint256 i; i < count; i++) { /* Compute weighted interest to tick */ uint256 weightedInterest = Math.mulDiv(interest, weights[i], normalization); /* Assign node pending amount */ nodes[i].pending = nodes[i].used + weightedInterest.toUint128(); /* Track remaining interest */ interestRemaining -= weightedInterest; } /* Drop off remaining interest dust at lowest node */ if (interestRemaining != 0) nodes[0].pending += interestRemaining.toUint128(); return (repayment, adminFee); } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/utils/math/Math.sol"; /** * @title Tick * @author MetaStreet Labs */ library Tick { /* * A tick encodes three conditions on liquidity: limit, duration, rate, and type. * Limit is the maximum depth that liquidity sourced from the node can be * used in. Duration is the maximum allowed duration for that liquidity. * Rate is the interest rate associated with that liquidity. Duration and * rates are encoded as indexes into predetermined, discrete tiers. Type is the * type of limit, which could either be absolute or ratio-based. * * +---------------------------------------------------------------------+ * | 128 | * +--------------------------------------|----------|----------|--------+ * | 120 | 3 | 3 | 2 | * | Limit | Dur. Idx | Rate Idx | Type | * +---------------------------------------------------------------------+ * * Duration Index is ordered from longest duration to shortest, e.g. 30 * days, 14 days, 7 days. * * Rate Index is ordered from lowest rate to highest rate, e.g. 10%, 30%, * 50%. */ /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @notice Limit type */ enum LimitType { Absolute, Ratio } /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Tick limit mask */ uint256 internal constant TICK_LIMIT_MASK = 0xffffffffffffffffffffffffffffff; /** * @notice Tick limit shift */ uint256 internal constant TICK_LIMIT_SHIFT = 8; /** * @notice Tick duration index mask */ uint256 internal constant TICK_DURATION_MASK = 0x7; /** * @notice Tick duration index shift */ uint256 internal constant TICK_DURATION_SHIFT = 5; /** * @notice Tick rate index mask */ uint256 internal constant TICK_RATE_MASK = 0x7; /** * @notice Tick rate index shift */ uint256 internal constant TICK_RATE_SHIFT = 2; /** * @notice Tick limit type mask */ uint256 internal constant TICK_LIMIT_TYPE_MASK = 0x3; /** * @notice Maximum number of durations supported */ uint256 internal constant MAX_NUM_DURATIONS = TICK_DURATION_MASK + 1; /** * @notice Maximum number of rates supported */ uint256 internal constant MAX_NUM_RATES = TICK_RATE_MASK + 1; /** * @notice Basis points scale */ uint256 internal constant BASIS_POINTS_SCALE = 10_000; /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice Invalid tick */ error InvalidTick(); /**************************************************************************/ /* Helper Functions */ /**************************************************************************/ /** * @dev Decode a Tick * @param tick Tick * @param oraclePrice Oracle price * @return limit Limit field * @return duration Duration field * @return rate Rate field * @return limitType Limit type field */ function decode( uint128 tick, uint256 oraclePrice ) internal pure returns (uint256 limit, uint256 duration, uint256 rate, LimitType limitType) { limit = ((tick >> TICK_LIMIT_SHIFT) & TICK_LIMIT_MASK); duration = ((tick >> TICK_DURATION_SHIFT) & TICK_DURATION_MASK); rate = ((tick >> TICK_RATE_SHIFT) & TICK_RATE_MASK); limitType = tick == type(uint128).max ? LimitType.Absolute : LimitType(tick & TICK_LIMIT_TYPE_MASK); limit = limitType == LimitType.Ratio ? Math.mulDiv(oraclePrice, limit, BASIS_POINTS_SCALE) : limit; } /** * @dev Validate a Tick (fast) * @param tick Tick * @param prevTick Previous tick * @param maxDurationIndex Maximum Duration Index (inclusive) * @param oraclePrice Oracle price * @return Limit field */ function validate( uint128 tick, uint128 prevTick, uint256 maxDurationIndex, uint256 oraclePrice ) internal pure returns (uint256) { (uint256 prevLimit, uint256 prevDuration, uint256 prevRate, ) = decode(prevTick, oraclePrice); (uint256 limit, uint256 duration, uint256 rate, ) = decode(tick, oraclePrice); if (limit < prevLimit) revert InvalidTick(); if (limit == prevLimit && duration < prevDuration) revert InvalidTick(); if (limit == prevLimit && duration == prevDuration && rate <= prevRate) revert InvalidTick(); if (duration > maxDurationIndex) revert InvalidTick(); return limit; } /** * @dev Validate a Tick (slow) * @param tick Tick * @param minLimit Minimum Limit (exclusive) * @param minDurationIndex Minimum Duration Index (inclusive) * @param maxDurationIndex Maximum Duration Index (inclusive) * @param minRateIndex Minimum Rate Index (inclusive) * @param maxRateIndex Maximum Rate Index (inclusive) */ function validate( uint128 tick, uint256 minLimit, uint256 minDurationIndex, uint256 maxDurationIndex, uint256 minRateIndex, uint256 maxRateIndex ) internal pure { (uint256 limit, uint256 duration, uint256 rate, LimitType limitType) = decode(tick, BASIS_POINTS_SCALE); if (limit <= minLimit) revert InvalidTick(); if (duration < minDurationIndex) revert InvalidTick(); if (duration > maxDurationIndex) revert InvalidTick(); if (rate < minRateIndex) revert InvalidTick(); if (rate > maxRateIndex) revert InvalidTick(); if (limitType == LimitType.Ratio && limit > BASIS_POINTS_SCALE) revert InvalidTick(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Deposit Token API * @author MetaStreet Labs */ abstract contract DepositToken { /**************************************************************************/ /* Events */ /**************************************************************************/ /** * @notice Emitted when deposit token created * @param instance Instance address * @param implementation Implementation address * @param tick Tick */ event TokenCreated(address indexed instance, address indexed implementation, uint128 indexed tick); /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Get the deposit token address for tick * * @param tick Tick * @return Deposit token address */ function depositToken(uint128 tick) public view virtual returns (address); /** * @notice Tokenize a tick * * @param tick Tick * @return Deposit token address */ function _tokenize(uint128 tick) internal virtual returns (address); /** * @notice Hook called by Pool on token transfers * * @param from From * @param to To * @param tick Tick * @param shares Shares */ function _onExternalTransfer(address from, address to, uint128 tick, uint256 shares) internal virtual; }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "./DepositToken.sol"; import "./ERC20DepositTokenFactory.sol"; import "./ERC20DepositTokenImplementation.sol"; /** * @title ERC20 Deposit Token * @author MetaStreet Labs */ contract ERC20DepositToken is DepositToken { /**************************************************************************/ /* Structures */ /**************************************************************************/ /** * @custom:storage-location erc7201:erc20DepositToken.depositTokenStorage */ struct DepositTokenStorage { /* Mapping of tick to token address */ mapping(uint128 => address) tokens; } /**************************************************************************/ /* State */ /**************************************************************************/ /** * @notice Current ERC20 deposit token implementation */ address internal immutable _implementation; /** * @notice Deposit token storage slot * @dev keccak256(abi.encode(uint256(keccak256("erc20DepositToken.depositTokenStorage")) - 1)) & ~bytes32(uint256(0xff)); */ bytes32 private constant DEPOSIT_TOKEN_STORAGE_LOCATION = 0xc61d9ab4916a5eab6b572dc8707662b99e55e17ecdc61af8ff79465ad64ded00; /**************************************************************************/ /* Constructor */ /**************************************************************************/ /** * @notice ERC20DepositToken constructor * * @param implementation_ ERC20 deposit token implementation address */ constructor(address implementation_) { _implementation = implementation_; } /**************************************************************************/ /* Internal Helpers */ /**************************************************************************/ /** * @notice Get reference to ERC-7201 deposit token storage * * @return $ Reference to deposit token storage */ function _getDepositTokenStorage() private pure returns (DepositTokenStorage storage $) { assembly { $.slot := DEPOSIT_TOKEN_STORAGE_LOCATION } } /**************************************************************************/ /* API */ /**************************************************************************/ /** * @notice Get ERC20 Deposit Token implementation address * * @return ERC20 Deposit Token implementation address */ function getERC20DepositTokenImplementation() external view returns (address) { return _implementation; } /** * @notice Tokenize a tick * * @param tick Tick */ function _tokenize(uint128 tick) internal override returns (address) { /* Return token if it already exists */ address tokenInstance = depositToken(tick); if (tokenInstance != address(0)) { emit TokenCreated(tokenInstance, _implementation, tick); return tokenInstance; } /* Create proxied token */ tokenInstance = ERC20DepositTokenFactory.deploy(tick); /* Store token instance in mapping */ _getDepositTokenStorage().tokens[tick] = tokenInstance; emit TokenCreated(tokenInstance, _implementation, tick); return tokenInstance; } /** * @inheritdoc DepositToken */ function depositToken(uint128 tick) public view override returns (address) { return _getDepositTokenStorage().tokens[tick]; } /** * @inheritdoc DepositToken */ function _onExternalTransfer(address from, address to, uint128 tick, uint256 shares) internal override { /* No operation if token does not exist */ if (depositToken(tick) == address(0)) return; /* Call external transfer hook */ ERC20DepositTokenImplementation(depositToken(tick)).onExternalTransfer(from, to, shares); } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/utils/Create2.sol"; import "./ERC20DepositTokenProxy.sol"; /** * @title ERC20 Deposit Token Factory * @author MetaStreet Labs */ library ERC20DepositTokenFactory { /** * @notice Deploy a proxied ERC20 deposit token * @param tick Tick * @return Proxy address */ function deploy(uint128 tick) external returns (address) { /* Create init data */ bytes memory initData = abi.encode( address(this), abi.encodeWithSignature("initialize(bytes)", abi.encode(tick)) ); /* Create token instance */ return Create2.deploy( 0, bytes32(uint256(tick)), abi.encodePacked(type(ERC20DepositTokenProxy).creationCode, initData) ); } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/interfaces/IERC20Metadata.sol"; import "@openzeppelin/contracts/interfaces/IERC721Metadata.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "../Pool.sol"; import "../interfaces/ILiquidity.sol"; /** * @title ERC20 Deposit Token Implementation * @author MetaStreet Labs */ contract ERC20DepositTokenImplementation is IERC20Metadata { using Tick for uint128; using SafeCast for uint256; /**************************************************************************/ /* Errors */ /**************************************************************************/ /** * @notice ERC20 Errors from OpenZeppelin implementation: * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.0.0/contracts/interfaces/draft-IERC6093.sol */ /** * @notice Insufficient balance * * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @notice Insufficient allowance * * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @notice Invalid spender * * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSpender(address sender); /** * @notice Invalid Sender * * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @notice Invalid Receiver * * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @notice Invalid caller */ error InvalidCaller(); /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Implementation version */ string public constant IMPLEMENTATION_VERSION = "1.0"; /** * @notice Fixed point scale */ uint256 internal constant FIXED_POINT_SCALE = 1e18; /**************************************************************************/ /* State */ /**************************************************************************/ /** * @notice Initialized boolean */ bool internal _initialized; /** * @notice MetaStreet V2 Pool */ Pool internal _pool; /** * @notice Deposit tick */ uint128 internal _tick; /** * @notice Owner => operator => allowance */ mapping(address => mapping(address => uint256)) private _allowances; /**************************************************************************/ /* Constructor */ /**************************************************************************/ /** * @notice ERC20 Deposit Token Implementation constructor */ constructor() { /* Disable initialization of implementation contract */ _initialized = true; } /**************************************************************************/ /* Initializer */ /**************************************************************************/ /** * @notice Initializer * @param params ABI-encoded parameters */ function initialize(bytes memory params) external { require(!_initialized, "Already initialized"); _initialized = true; /* Decode parameters */ uint128 tick_ = abi.decode(params, (uint128)); _pool = Pool(msg.sender); _tick = tick_; } /**************************************************************************/ /* Internal Helpers */ /**************************************************************************/ /** * @notice Helper function to get rounded loan limit for name() and symbol() * * @dev Solely utilized to generate rounded number in name() and symbol() getters. * For absolute limit type, loan limits > 1 ETH are rounded to the nearest * whole number. Under 1 ETH are rounded to the nearest hundredth place. * For ratio limit type, loan limits are expressed as either a whole number * percentage or as a 2 d.p percentage. * * @param loanLimit_ Loan limit as uint256 * * @return Loan limit as string */ function _getLoanLimit(Tick.LimitType limitType_, uint256 loanLimit_) internal pure returns (string memory) { /* If limit type is ratio, express loan limit as a percentage */ if (limitType_ == Tick.LimitType.Ratio) { /* Compute integer and decimals */ string memory integer = Strings.toString(loanLimit_ / 100); uint256 decimals_ = loanLimit_ % 100; return decimals_ == 0 ? string.concat(integer, "%") : string.concat(integer, ".", Strings.toString(decimals_), "%"); } /* Handle loan limits > 1 ETH */ if (loanLimit_ >= FIXED_POINT_SCALE) { return Strings.toString((loanLimit_ + (FIXED_POINT_SCALE / 2)) / FIXED_POINT_SCALE); } else { /* Handle loan limits < 1 ETH */ uint256 scaledValue = loanLimit_ * 100; uint256 integer = scaledValue / FIXED_POINT_SCALE; if (scaledValue % FIXED_POINT_SCALE >= FIXED_POINT_SCALE / 2) { integer += 1; } uint256 hundredthPlaces = integer % 100; string memory decimalStr = hundredthPlaces < 10 ? string.concat("0", Strings.toString(hundredthPlaces)) : Strings.toString(hundredthPlaces); return string.concat("0.", decimalStr); } } /**************************************************************************/ /* Getters */ /**************************************************************************/ /** * @inheritdoc IERC20Metadata */ function name() public view returns (string memory) { (uint256 limit_, , , Tick.LimitType limitType_) = _tick.decode(Tick.BASIS_POINTS_SCALE); return string.concat( "MetaStreet V2 Deposit: ", IERC721Metadata(_pool.collateralToken()).symbol(), "-", IERC20Metadata(_pool.currencyToken()).symbol(), ":", _getLoanLimit(limitType_, limit_) ); } /** * @inheritdoc IERC20Metadata */ function symbol() public view returns (string memory) { (uint256 limit_, , , Tick.LimitType limitType_) = _tick.decode(Tick.BASIS_POINTS_SCALE); return string.concat( "m", IERC20Metadata(_pool.currencyToken()).symbol(), "-", IERC721Metadata(_pool.collateralToken()).symbol(), ":", _getLoanLimit(limitType_, limit_) ); } /** * @inheritdoc IERC20Metadata */ function decimals() public view virtual returns (uint8) { return 18; } /** * @notice Pool * @return Pool address */ function pool() external view returns (Pool) { return _pool; } /** * @notice Tick * @return Encoded tick */ function tick() external view returns (uint128) { return _tick; } /** * @notice Tick loan limit * @return Loan limit in currency tokens */ function limit() external view returns (uint128) { (uint256 limit_, , , ) = _tick.decode(Tick.BASIS_POINTS_SCALE); return limit_.toUint128(); } /** * @notice Tick duration * @return Duration in seconds */ function duration() external view returns (uint64) { (, uint256 durationIndex, , ) = _tick.decode(Tick.BASIS_POINTS_SCALE); return _pool.durations()[durationIndex]; } /** * @notice Tick rate * @return Rate in interest per second */ function rate() external view returns (uint64) { (, , uint256 rateIndex, ) = _tick.decode(Tick.BASIS_POINTS_SCALE); return _pool.rates()[rateIndex]; } /** * @notice Currency token * @return Address of currency token */ function currencyToken() external view returns (address) { return _pool.currencyToken(); } /** * @notice Deposit share price * @return Deposit share price */ function depositSharePrice() external view returns (uint256) { return _pool.depositSharePrice(_tick); } /** * @notice Redemption share price * @return Redemption share price */ function redemptionSharePrice() external view returns (uint256) { return _pool.redemptionSharePrice(_tick); } /**************************************************************************/ /* Internal Helpers */ /**************************************************************************/ /** * @notice Helper function to transfer tokens * * @param from From * @param to To * @param value Value */ function _transfer(address from, address to, uint256 value) internal { /* No transfer to zero address */ if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } /* Validate balance */ uint256 fromBalance = balanceOf(from); if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } /* Call transfer on pool */ _pool.transfer(from, to, _tick, value); emit Transfer(from, to, value); } /**************************************************************************/ /* Hooks */ /**************************************************************************/ /** * @notice External transfer hook * * @param from From * @param to To * @param value Value */ function onExternalTransfer(address from, address to, uint256 value) external { if (msg.sender != address(_pool)) revert InvalidCaller(); emit Transfer(from, to, value); } /**************************************************************************/ /* IERC20 API */ /**************************************************************************/ /** * @inheritdoc IERC20 */ function totalSupply() public view returns (uint256) { /* Get Pool node */ ILiquidity.NodeInfo memory node = _pool.liquidityNode(_tick); /* Calculate total supply */ return node.shares - node.redemptions; } /** * @inheritdoc IERC20 */ function balanceOf(address account) public view returns (uint256) { /* Get shares from deposits */ (uint128 shares, ) = _pool.deposits(account, _tick); return shares; } /** * @inheritdoc IERC20 */ function allowance(address owner, address spender) public view returns (uint256) { return _allowances[owner][spender]; } /** * @inheritdoc IERC20 */ function approve(address spender, uint256 value) public returns (bool) { if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } _allowances[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @inheritdoc IERC20 */ function transfer(address to, uint256 value) public returns (bool) { _transfer(msg.sender, to, value); return true; } /** * @inheritdoc IERC20 */ function transferFrom(address from, address to, uint256 value) public returns (bool) { /* No transfer from zero address */ if (from == address(0)) { revert ERC20InvalidSender(address(0)); } /* Check + update allowance */ uint256 currentAllowance = allowance(from, msg.sender); if (currentAllowance != type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance(msg.sender, currentAllowance, value); } unchecked { _allowances[from][msg.sender] = currentAllowance - value; } } _transfer(from, to, value); return true; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.20; import "@openzeppelin/contracts/proxy/Proxy.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "./ERC20DepositToken.sol"; /** * @title ERC20 Deposit Token Proxy * @author MetaStreet Labs */ contract ERC20DepositTokenProxy is Proxy { /**************************************************************************/ /* Constants */ /**************************************************************************/ /** * @notice Beacon address (ERC20DepositToken) */ address internal immutable _beacon; /**************************************************************************/ /* Constructor */ /**************************************************************************/ /** * @notice ERC20DepositTokenProxy constructor * * @dev Set the ERC20DepositToken address as beacon * and initializes the storage of the Proxy * * @param beacon Beacon address * @param data Initialization data */ constructor(address beacon, bytes memory data) { _beacon = beacon; Address.functionDelegateCall(ERC20DepositToken(beacon).getERC20DepositTokenImplementation(), data); } /**************************************************************************/ /* Getters */ /**************************************************************************/ /** * @notice Get implementation address * * @dev Overrides Proxy._implementation() * * @return Implementation address */ function _implementation() internal view virtual override returns (address) { return ERC20DepositToken(_beacon).getERC20DepositTokenImplementation(); } }
{ "viaIR": true, "optimizer": { "enabled": true, "runs": 400 }, "evmVersion": "shanghai", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": { "contracts/BorrowLogic.sol": { "BorrowLogic": "0xe7ae806fe865b410315f86675c92822a50aaa800" }, "contracts/DepositLogic.sol": { "DepositLogic": "0xe0f7d91d33094d766e0e1f83990d3fdda33d754f" }, "contracts/LiquidityLogic.sol": { "LiquidityLogic": "0x273f42b91d762d1f36fcd289c80742809c7f1064" }, "contracts/tokenization/ERC20DepositTokenFactory.sol": { "ERC20DepositTokenFactory": "0x3d9c7b0c10994f4926c64c32badbc93c91fca8fd" } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000e0194f47040e2424b8a65cb5f7112a5dbe1f93bf00000000000000000000000000000000000076a84fef008cdabe6409d2fe638b00000000000000000000000000000000000000447e69651d841bd8d104bed49300000000000000000000000023b915eb10cafb2c5194e10d68932d7c6cc9aff300000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001000000000000000000000000c4dc9ef8763433aae26635bc5a09e362605fad18
-----Decoded View---------------
Arg [0] : collateralLiquidator (address): 0xE0194F47040E2424b8a65cB5F7112a5DBE1F93Bf
Arg [1] : delegateRegistryV1 (address): 0x00000000000076A84feF008CDAbe6409d2FE638B
Arg [2] : delegateRegistryV2 (address): 0x00000000000000447e69651d841bD8D104Bed493
Arg [3] : erc20DepositTokenImplementation (address): 0x23b915eb10caFb2C5194e10D68932d7c6cC9AFF3
Arg [4] : collateralWrappers (address[]): 0xc4dC9eF8763433aAe26635bc5a09e362605fAd18
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000e0194f47040e2424b8a65cb5f7112a5dbe1f93bf
Arg [1] : 00000000000000000000000000000000000076a84fef008cdabe6409d2fe638b
Arg [2] : 00000000000000000000000000000000000000447e69651d841bd8d104bed493
Arg [3] : 00000000000000000000000023b915eb10cafb2c5194e10d68932d7c6cc9aff3
Arg [4] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 000000000000000000000000c4dc9ef8763433aae26635bc5a09e362605fad18
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Multichain Portfolio | 26 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.