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Contract Name:
BondIssuer
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.19; import { IBondFactory } from "./_interfaces/buttonwood/IBondFactory.sol"; import { IBondController } from "./_interfaces/buttonwood/IBondController.sol"; import { IBondIssuer, NoMaturedBonds } from "./_interfaces/IBondIssuer.sol"; import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol"; import { EnumerableSetUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol"; import { BondHelpers } from "./_utils/BondHelpers.sol"; /** * @title BondIssuer * * @notice An issuer periodically issues bonds based on a predefined configuration. * * @dev Based on the provided frequency, issuer instantiates a new bond with the config when poked. * */ contract BondIssuer is IBondIssuer, OwnableUpgradeable { using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet; using BondHelpers for IBondController; /// @dev Using the same granularity as the underlying buttonwood tranche contracts. /// https://github.com/buttonwood-protocol/tranche/blob/main/contracts/BondController.sol uint256 private constant TRANCHE_RATIO_GRANULARITY = 1000; /// @notice Address of the bond factory. IBondFactory public immutable bondFactory; /// @notice The underlying rebasing token used for tranching. address public immutable collateral; /// @notice The maximum maturity duration for the issued bonds. /// @dev In practice, bonds issued by this issuer won't have a constant duration as /// block.timestamp when the issue function is invoked can vary. /// Rather these bonds are designed to have a predictable maturity date. uint256 public maxMaturityDuration; /// @notice The tranche ratios. /// @dev Each tranche ratio is expressed as a fixed point number /// such that the sum of all the tranche ratios is exactly 1000. /// https://github.com/buttonwood-protocol/tranche/blob/main/contracts/BondController.sol#L20 uint256[] public trancheRatios; /// @notice Time to elapse since last issue window start, after which a new bond can be issued. /// AKA, issue frequency. uint256 public minIssueTimeIntervalSec; /// @notice The issue window begins this many seconds into the minIssueTimeIntervalSec period. /// @dev For example if minIssueTimeIntervalSec is 604800 (1 week), and issueWindowOffsetSec is 93600 /// then the issue window opens at Friday 2AM GMT every week. uint256 public issueWindowOffsetSec; /// @notice An enumerable list to keep track of bonds issued by this issuer. /// @dev Bonds are only added and never removed, thus the last item will always point /// to the latest bond. EnumerableSetUpgradeable.AddressSet private _issuedBonds; /// @dev List of all indices of active bonds in the `_issuedBonds` list. uint256[] private _activeBondIDXs; /// @notice The timestamp when the issue window opened during the last issue. uint256 public lastIssueWindowTimestamp; /// @notice Contract constructor /// @param bondFactory_ The bond factory reference. /// @param collateral_ The address of the collateral ERC-20. constructor(IBondFactory bondFactory_, address collateral_) { bondFactory = bondFactory_; collateral = collateral_; } /// @notice Contract initializer. /// @param maxMaturityDuration_ The maximum maturity duration. /// @param trancheRatios_ The tranche ratios. /// @param minIssueTimeIntervalSec_ The minimum time between successive issues. /// @param issueWindowOffsetSec_ The issue window offset. function init( uint256 maxMaturityDuration_, uint256[] memory trancheRatios_, uint256 minIssueTimeIntervalSec_, uint256 issueWindowOffsetSec_ ) public initializer { __Ownable_init(); updateMaxMaturityDuration(maxMaturityDuration_); updateTrancheRatios(trancheRatios_); updateIssuanceTimingConfig(minIssueTimeIntervalSec_, issueWindowOffsetSec_); } /// @notice Updates the bond duration. /// @param maxMaturityDuration_ The new maximum maturity duration. function updateMaxMaturityDuration(uint256 maxMaturityDuration_) public onlyOwner { maxMaturityDuration = maxMaturityDuration_; } /// @notice Updates the tranche ratios used to issue bonds. /// @param trancheRatios_ The new tranche ratios, ordered by decreasing seniority (i.e. A to Z) function updateTrancheRatios(uint256[] memory trancheRatios_) public onlyOwner { trancheRatios = trancheRatios_; uint256 ratioSum; for (uint8 i = 0; i < trancheRatios_.length; i++) { ratioSum += trancheRatios_[i]; } require(ratioSum == TRANCHE_RATIO_GRANULARITY, "BondIssuer: Invalid tranche ratios"); } /// @notice Updates the bond frequency and offset. /// @param minIssueTimeIntervalSec_ The new issuance interval. /// @param issueWindowOffsetSec_ The new issue window offset. function updateIssuanceTimingConfig(uint256 minIssueTimeIntervalSec_, uint256 issueWindowOffsetSec_) public onlyOwner { minIssueTimeIntervalSec = minIssueTimeIntervalSec_; issueWindowOffsetSec = issueWindowOffsetSec_; } /// @inheritdoc IBondIssuer function isInstance(IBondController bond) external view override returns (bool) { return _issuedBonds.contains(address(bond)); } /// @inheritdoc IBondIssuer /// @dev Reverts if none of the active bonds are mature. function matureActive() external { bool bondsMature = false; // NOTE: We traverse the active index list in the reverse order as deletions involve // swapping the deleted element to the end of the list and removing the last element. for (uint256 i = _activeBondIDXs.length; i > 0; i--) { IBondController bond = IBondController(_issuedBonds.at(_activeBondIDXs[i - 1])); if (bond.secondsToMaturity() <= 0) { if (!bond.isMature()) { bond.mature(); } _activeBondIDXs[i - 1] = _activeBondIDXs[_activeBondIDXs.length - 1]; _activeBondIDXs.pop(); emit BondMature(bond); bondsMature = true; } } if (!bondsMature) { revert NoMaturedBonds(); } } /// @inheritdoc IBondIssuer function issue() public override { if (block.timestamp < lastIssueWindowTimestamp + minIssueTimeIntervalSec) { return; } // Set to the timestamp of the most recent issue window start lastIssueWindowTimestamp = block.timestamp - ((block.timestamp - issueWindowOffsetSec) % minIssueTimeIntervalSec); IBondController bond = IBondController( bondFactory.createBond(collateral, trancheRatios, lastIssueWindowTimestamp + maxMaturityDuration) ); _issuedBonds.add(address(bond)); _activeBondIDXs.push(_issuedBonds.length() - 1); emit BondIssued(bond); } /// @inheritdoc IBondIssuer /// @dev Lazily issues a new bond when the time is right. function getLatestBond() external override returns (IBondController) { issue(); // NOTE: The latest bond will be at the end of the list. return IBondController(_issuedBonds.at(_issuedBonds.length() - 1)); } /// @inheritdoc IBondIssuer function issuedCount() external view override returns (uint256) { return _issuedBonds.length(); } /// @inheritdoc IBondIssuer function issuedBondAt(uint256 index) external view override returns (IBondController) { return IBondController(_issuedBonds.at(index)); } /// @notice Number of bonds issued by this issuer which have not yet reached their maturity date. /// @return Number of active bonds. function activeCount() external view returns (uint256) { return _activeBondIDXs.length; } /// @notice The bond address from the active list by index. /// @dev This is NOT ordered by issuance time. /// @param index The index of the bond in the active list. /// @return Address of the active bond. function activeBondAt(uint256 index) external view returns (IBondController) { return IBondController(_issuedBonds.at(_activeBondIDXs[index])); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original * initialization step. This is essential to configure modules that are added through upgrades and that require * initialization. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @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 v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @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 * ==== * * [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(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) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason 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 { // 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 v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library MathUpgradeable { 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) { return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1); /////////////////////////////////////////////// // 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. It 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)`. // We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`. // This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`. // Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a // good first aproximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1; uint256 x = a; if (x >> 128 > 0) { x >>= 128; result <<= 64; } if (x >> 64 > 0) { x >>= 64; result <<= 32; } if (x >> 32 > 0) { x >>= 32; result <<= 16; } if (x >> 16 > 0) { x >>= 16; result <<= 8; } if (x >> 8 > 0) { x >>= 8; result <<= 4; } if (x >> 4 > 0) { x >>= 4; result <<= 2; } if (x >> 2 > 0) { result <<= 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) { uint256 result = sqrt(a); if (rounding == Rounding.Up && result * result < a) { result += 1; } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/math/SafeCast.sol) 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 SafeCastUpgradeable { /** * @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) { require(value >= type(int248).min && value <= type(int248).max, "SafeCast: value doesn't fit in 248 bits"); return int248(value); } /** * @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) { require(value >= type(int240).min && value <= type(int240).max, "SafeCast: value doesn't fit in 240 bits"); return int240(value); } /** * @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) { require(value >= type(int232).min && value <= type(int232).max, "SafeCast: value doesn't fit in 232 bits"); return int232(value); } /** * @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) { require(value >= type(int224).min && value <= type(int224).max, "SafeCast: value doesn't fit in 224 bits"); return int224(value); } /** * @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) { require(value >= type(int216).min && value <= type(int216).max, "SafeCast: value doesn't fit in 216 bits"); return int216(value); } /** * @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) { require(value >= type(int208).min && value <= type(int208).max, "SafeCast: value doesn't fit in 208 bits"); return int208(value); } /** * @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) { require(value >= type(int200).min && value <= type(int200).max, "SafeCast: value doesn't fit in 200 bits"); return int200(value); } /** * @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) { require(value >= type(int192).min && value <= type(int192).max, "SafeCast: value doesn't fit in 192 bits"); return int192(value); } /** * @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) { require(value >= type(int184).min && value <= type(int184).max, "SafeCast: value doesn't fit in 184 bits"); return int184(value); } /** * @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) { require(value >= type(int176).min && value <= type(int176).max, "SafeCast: value doesn't fit in 176 bits"); return int176(value); } /** * @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) { require(value >= type(int168).min && value <= type(int168).max, "SafeCast: value doesn't fit in 168 bits"); return int168(value); } /** * @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) { require(value >= type(int160).min && value <= type(int160).max, "SafeCast: value doesn't fit in 160 bits"); return int160(value); } /** * @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) { require(value >= type(int152).min && value <= type(int152).max, "SafeCast: value doesn't fit in 152 bits"); return int152(value); } /** * @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) { require(value >= type(int144).min && value <= type(int144).max, "SafeCast: value doesn't fit in 144 bits"); return int144(value); } /** * @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) { require(value >= type(int136).min && value <= type(int136).max, "SafeCast: value doesn't fit in 136 bits"); return int136(value); } /** * @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) { require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits"); return int128(value); } /** * @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) { require(value >= type(int120).min && value <= type(int120).max, "SafeCast: value doesn't fit in 120 bits"); return int120(value); } /** * @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) { require(value >= type(int112).min && value <= type(int112).max, "SafeCast: value doesn't fit in 112 bits"); return int112(value); } /** * @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) { require(value >= type(int104).min && value <= type(int104).max, "SafeCast: value doesn't fit in 104 bits"); return int104(value); } /** * @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) { require(value >= type(int96).min && value <= type(int96).max, "SafeCast: value doesn't fit in 96 bits"); return int96(value); } /** * @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) { require(value >= type(int88).min && value <= type(int88).max, "SafeCast: value doesn't fit in 88 bits"); return int88(value); } /** * @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) { require(value >= type(int80).min && value <= type(int80).max, "SafeCast: value doesn't fit in 80 bits"); return int80(value); } /** * @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) { require(value >= type(int72).min && value <= type(int72).max, "SafeCast: value doesn't fit in 72 bits"); return int72(value); } /** * @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) { require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits"); return int64(value); } /** * @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) { require(value >= type(int56).min && value <= type(int56).max, "SafeCast: value doesn't fit in 56 bits"); return int56(value); } /** * @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) { require(value >= type(int48).min && value <= type(int48).max, "SafeCast: value doesn't fit in 48 bits"); return int48(value); } /** * @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) { require(value >= type(int40).min && value <= type(int40).max, "SafeCast: value doesn't fit in 40 bits"); return int40(value); } /** * @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) { require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits"); return int32(value); } /** * @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) { require(value >= type(int24).min && value <= type(int24).max, "SafeCast: value doesn't fit in 24 bits"); return int24(value); } /** * @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) { require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits"); return int16(value); } /** * @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) { require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits"); return int8(value); } /** * @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 v4.7.0) (utils/structs/EnumerableSet.sol) 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. * * ``` * 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 EnumerableSetUpgradeable { // 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) { return _values(set._inner); } // 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 on 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: GPL-3.0-or-later pragma solidity ^0.8.0; import { ITranche } from "./ITranche.sol"; interface IBondController { function collateralToken() external view returns (address); function maturityDate() external view returns (uint256); function creationDate() external view returns (uint256); function totalDebt() external view returns (uint256); function feeBps() external view returns (uint256); function isMature() external view returns (bool); function tranches(uint256 i) external view returns (ITranche token, uint256 ratio); function trancheCount() external view returns (uint256 count); function trancheTokenAddresses(ITranche token) external view returns (bool); function deposit(uint256 amount) external; function redeem(uint256[] memory amounts) external; function mature() external; function redeemMature(address tranche, uint256 amount) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IBondFactory { function createBond( address _collateralToken, uint256[] memory trancheRatios, uint256 maturityDate ) external returns (address); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; interface ITranche is IERC20Upgradeable { function bond() external view returns (address); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IBondController } from "./buttonwood/IBondController.sol"; /// @notice Expected at least one matured bond. error NoMaturedBonds(); interface IBondIssuer { /// @notice Event emitted when a new bond is issued by the issuer. /// @param bond The newly issued bond. event BondIssued(IBondController bond); /// @notice Event emitted when a bond has matured. /// @param bond The matured bond. event BondMature(IBondController bond); /// @notice The address of the underlying collateral token to be used for issued bonds. /// @return Address of the collateral token. function collateral() external view returns (address); /// @notice Invokes `mature` on issued active bonds. function matureActive() external; /// @notice Issues a new bond if sufficient time has elapsed since the last issue. function issue() external; /// @notice Checks if a given bond has been issued by the issuer. /// @param bond Address of the bond to check. /// @return if the bond has been issued by the issuer. function isInstance(IBondController bond) external view returns (bool); /// @notice Fetches the most recently issued bond. /// @return Address of the most recent bond. function getLatestBond() external returns (IBondController); /// @notice Returns the total number of bonds issued by this issuer. /// @return Number of bonds. function issuedCount() external view returns (uint256); /// @notice The bond address from the issued list by index. /// @param index The index of the bond in the issued list. /// @return Address of the bond. function issuedBondAt(uint256 index) external view returns (IBondController); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.19; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; import { IBondController } from "../_interfaces/buttonwood/IBondController.sol"; import { ITranche } from "../_interfaces/buttonwood/ITranche.sol"; import { SafeCastUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol"; import { MathUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; /// @notice Expected tranche to be part of bond. /// @param tranche Address of the tranche token. error UnacceptableTranche(ITranche tranche); struct BondTranches { ITranche[] tranches; uint256[] trancheRatios; } /** * @title BondTranchesHelpers * * @notice Library with helper functions for the bond's retrieved tranche data. * */ library BondTranchesHelpers { /// @notice Iterates through the tranche data to find the seniority index of the given tranche. /// @param bt The tranche data object. /// @param t The address of the tranche to check. /// @return the index of the tranche in the tranches array. function indexOf(BondTranches memory bt, ITranche t) internal pure returns (uint8) { for (uint8 i = 0; i < bt.tranches.length; i++) { if (bt.tranches[i] == t) { return i; } } revert UnacceptableTranche(t); } } /** * @title TrancheHelpers * * @notice Library with helper functions for tranche tokens. * */ library TrancheHelpers { /// @notice Given a tranche, looks up the collateral balance backing the tranche supply. /// @param t Address of the tranche token. /// @return The collateral balance and the tranche token supply. function getTrancheCollateralization(ITranche t) internal view returns (uint256, uint256) { IBondController bond = IBondController(t.bond()); BondTranches memory bt; uint256[] memory collateralBalances; uint256[] memory trancheSupplies; (bt, collateralBalances, trancheSupplies) = BondHelpers.getTrancheCollateralizations(bond); uint256 trancheIndex = BondTranchesHelpers.indexOf(bt, t); return (collateralBalances[trancheIndex], trancheSupplies[trancheIndex]); } } /** * @title BondHelpers * * @notice Library with helper functions for ButtonWood's Bond contract. * */ library BondHelpers { using SafeCastUpgradeable for uint256; using MathUpgradeable for uint256; // Replicating value used here: // https://github.com/buttonwood-protocol/tranche/blob/main/contracts/BondController.sol uint256 private constant TRANCHE_RATIO_GRANULARITY = 1000; uint256 private constant BPS = 10_000; /// @notice Given a bond, calculates the time remaining to maturity. /// @param b The address of the bond contract. /// @return The number of seconds before the bond reaches maturity. function secondsToMaturity(IBondController b) internal view returns (uint256) { uint256 maturityDate = b.maturityDate(); return maturityDate > block.timestamp ? maturityDate - block.timestamp : 0; } /// @notice Given a bond, retrieves all of the bond's tranches. /// @param b The address of the bond contract. /// @return The tranche data. function getTranches(IBondController b) internal view returns (BondTranches memory) { BondTranches memory bt; uint8 trancheCount = b.trancheCount().toUint8(); bt.tranches = new ITranche[](trancheCount); bt.trancheRatios = new uint256[](trancheCount); // Max tranches per bond < 2**8 - 1 for (uint8 i = 0; i < trancheCount; i++) { (ITranche t, uint256 ratio) = b.tranches(i); bt.tranches[i] = t; bt.trancheRatios[i] = ratio; } return bt; } /// @notice Given a bond, returns the tranche at the specified index. /// @param b The address of the bond contract. /// @param i Index of the tranche. /// @return t The tranche address. function trancheAt(IBondController b, uint8 i) internal view returns (ITranche t) { (t, ) = b.tranches(i); return t; } /// @notice Helper function to estimate the amount of tranches minted when a given amount of collateral /// is deposited into the bond. /// @dev This function is used off-chain services (using callStatic) to preview tranches minted after /// @param b The address of the bond contract. /// @return The tranche data, an array of tranche amounts and fees. function previewDeposit(IBondController b, uint256 collateralAmount) internal view returns ( BondTranches memory, uint256[] memory, uint256[] memory ) { BondTranches memory bt = getTranches(b); uint256[] memory trancheAmts = new uint256[](bt.tranches.length); uint256[] memory fees = new uint256[](bt.tranches.length); uint256 totalDebt = b.totalDebt(); uint256 collateralBalance = IERC20Upgradeable(b.collateralToken()).balanceOf(address(b)); uint256 feeBps = b.feeBps(); for (uint8 i = 0; i < bt.tranches.length; i++) { trancheAmts[i] = collateralAmount.mulDiv(bt.trancheRatios[i], TRANCHE_RATIO_GRANULARITY); if (collateralBalance > 0) { trancheAmts[i] = trancheAmts[i].mulDiv(totalDebt, collateralBalance); } } if (feeBps > 0) { for (uint8 i = 0; i < bt.tranches.length; i++) { fees[i] = trancheAmts[i].mulDiv(feeBps, BPS); trancheAmts[i] -= fees[i]; } } return (bt, trancheAmts, fees); } /// @notice Given a bond, for each tranche token retrieves the total collateral redeemable /// for the total supply of the tranche token (aka debt issued). /// @dev The cdr can be computed for each tranche by dividing the /// returned tranche's collateralBalance by the tranche's totalSupply. /// @param b The address of the bond contract. /// @return The tranche data and the list of collateral balances and the total supplies for each tranche. function getTrancheCollateralizations(IBondController b) internal view returns ( BondTranches memory, uint256[] memory, uint256[] memory ) { BondTranches memory bt = getTranches(b); uint256[] memory collateralBalances = new uint256[](bt.tranches.length); uint256[] memory trancheSupplies = new uint256[](bt.tranches.length); // When the bond is mature, the collateral is transferred over to the individual tranche token contracts if (b.isMature()) { for (uint8 i = 0; i < bt.tranches.length; i++) { trancheSupplies[i] = bt.tranches[i].totalSupply(); collateralBalances[i] = IERC20Upgradeable(b.collateralToken()).balanceOf(address(bt.tranches[i])); } return (bt, collateralBalances, trancheSupplies); } // Before the bond is mature, all the collateral is held by the bond contract uint256 bondCollateralBalance = IERC20Upgradeable(b.collateralToken()).balanceOf(address(b)); uint256 zTrancheIndex = bt.tranches.length - 1; for (uint8 i = 0; i < bt.tranches.length; i++) { trancheSupplies[i] = bt.tranches[i].totalSupply(); // a to y tranches if (i != zTrancheIndex) { collateralBalances[i] = (trancheSupplies[i] <= bondCollateralBalance) ? trancheSupplies[i] : bondCollateralBalance; bondCollateralBalance -= collateralBalances[i]; } // z tranche else { collateralBalances[i] = bondCollateralBalance; } } return (bt, collateralBalances, trancheSupplies); } /// @notice For a given bond and user address, computes the maximum number of each of the bond's tranches /// the user is able to redeem before the bond's maturity. These tranche amounts necessarily match the bond's tranche ratios. /// @param b The address of the bond contract. /// @param u The address to check balance for. /// @return The tranche data and an array of tranche token balances. function computeRedeemableTrancheAmounts(IBondController b, address u) internal view returns (BondTranches memory, uint256[] memory) { BondTranches memory bt = getTranches(b); uint256[] memory redeemableAmts = new uint256[](bt.tranches.length); // We Calculate how many underlying assets could be redeemed from each tranche balance, // assuming other tranches are not an issue, and record the smallest amount. // // Usually one tranche balance is the limiting factor, we first loop through to identify // it by figuring out the one which has the least `trancheBalance/trancheRatio`. // uint256 minBalanceToTrancheRatio = type(uint256).max; uint8 i; for (i = 0; i < bt.tranches.length; i++) { // NOTE: We round the avaiable balance down to the nearest multiple of the // tranche ratio. This ensures that `minBalanceToTrancheRatio` // can be represented without loss as a fixedPt number. uint256 bal = bt.tranches[i].balanceOf(u); bal = bal - (bal % bt.trancheRatios[i]); uint256 d = bal.mulDiv(TRANCHE_RATIO_GRANULARITY, bt.trancheRatios[i]); if (d < minBalanceToTrancheRatio) { minBalanceToTrancheRatio = d; } // if one of the balances is zero, we return if (minBalanceToTrancheRatio == 0) { return (bt, redeemableAmts); } } // Now that we have `minBalanceToTrancheRatio`, we compute the redeemable amounts. for (i = 0; i < bt.tranches.length; i++) { redeemableAmts[i] = bt.trancheRatios[i].mulDiv(minBalanceToTrancheRatio, TRANCHE_RATIO_GRANULARITY); } return (bt, redeemableAmts); } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"contract IBondFactory","name":"bondFactory_","type":"address"},{"internalType":"address","name":"collateral_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"NoMaturedBonds","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract IBondController","name":"bond","type":"address"}],"name":"BondIssued","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract IBondController","name":"bond","type":"address"}],"name":"BondMature","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"activeBondAt","outputs":[{"internalType":"contract IBondController","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"activeCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"bondFactory","outputs":[{"internalType":"contract IBondFactory","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"collateral","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLatestBond","outputs":[{"internalType":"contract IBondController","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"maxMaturityDuration_","type":"uint256"},{"internalType":"uint256[]","name":"trancheRatios_","type":"uint256[]"},{"internalType":"uint256","name":"minIssueTimeIntervalSec_","type":"uint256"},{"internalType":"uint256","name":"issueWindowOffsetSec_","type":"uint256"}],"name":"init","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IBondController","name":"bond","type":"address"}],"name":"isInstance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"issue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"issueWindowOffsetSec","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"issuedBondAt","outputs":[{"internalType":"contract IBondController","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"issuedCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastIssueWindowTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"matureActive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxMaturityDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minIssueTimeIntervalSec","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"trancheRatios","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minIssueTimeIntervalSec_","type":"uint256"},{"internalType":"uint256","name":"issueWindowOffsetSec_","type":"uint256"}],"name":"updateIssuanceTimingConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"maxMaturityDuration_","type":"uint256"}],"name":"updateMaxMaturityDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"trancheRatios_","type":"uint256[]"}],"name":"updateTrancheRatios","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000017550f48c61915a67f216a083ced89e04d91fd54000000000000000000000000d46ba6d942050d489dbd938a2c909a5d5039a161
-----Decoded View---------------
Arg [0] : bondFactory_ (address): 0x17550f48c61915A67F216a083ced89E04d91fD54
Arg [1] : collateral_ (address): 0xD46bA6D942050d489DBd938a2C909A5d5039A161
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000017550f48c61915a67f216a083ced89e04d91fd54
Arg [1] : 000000000000000000000000d46ba6d942050d489dbd938a2c909a5d5039a161
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Multichain Portfolio | 30 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.