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0x60806040 | 16544107 | 516 days ago | IN | Create: PoolTokens | 0 ETH | 0.1224097 |
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Contract Name:
PoolTokens
Compiler Version
v0.6.12+commit.27d51765
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {ERC721PresetMinterPauserAutoIdUpgradeSafe} from "../../external/ERC721PresetMinterPauserAutoId.sol"; import {ERC165UpgradeSafe} from "../../external/ERC721PresetMinterPauserAutoId.sol"; import {IERC165} from "../../external/ERC721PresetMinterPauserAutoId.sol"; import {GoldfinchConfig} from "./GoldfinchConfig.sol"; import {ConfigHelper} from "./ConfigHelper.sol"; import {HasAdmin} from "./HasAdmin.sol"; import {ConfigurableRoyaltyStandard} from "./ConfigurableRoyaltyStandard.sol"; import {IERC2981} from "../../interfaces/IERC2981.sol"; import {ITranchedPool} from "../../interfaces/ITranchedPool.sol"; import {IPoolTokens} from "../../interfaces/IPoolTokens.sol"; import {IBackerRewards} from "../../interfaces/IBackerRewards.sol"; /** * @title PoolTokens * @notice PoolTokens is an ERC721 compliant contract, which can represent * junior tranche or senior tranche shares of any of the borrower pools. * @author Goldfinch */ contract PoolTokens is IPoolTokens, ERC721PresetMinterPauserAutoIdUpgradeSafe, HasAdmin, IERC2981 { bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; GoldfinchConfig public config; using ConfigHelper for GoldfinchConfig; // tokenId => tokenInfo mapping(uint256 => TokenInfo) public tokens; // poolAddress => poolInfo mapping(address => PoolInfo) public pools; ConfigurableRoyaltyStandard.RoyaltyParams public royaltyParams; using ConfigurableRoyaltyStandard for ConfigurableRoyaltyStandard.RoyaltyParams; /* We are using our own initializer function so that OZ doesn't automatically set owner as msg.sender. Also, it lets us set our config contract */ // solhint-disable-next-line func-name-mixedcase function __initialize__(address owner, GoldfinchConfig _config) external initializer { require( owner != address(0) && address(_config) != address(0), "Owner and config addresses cannot be empty" ); __Context_init_unchained(); __AccessControl_init_unchained(); __ERC165_init_unchained(); // This is setting name and symbol of the NFT's __ERC721_init_unchained("Goldfinch V2 Pool Tokens", "GFI-V2-PT"); __Pausable_init_unchained(); __ERC721Pausable_init_unchained(); config = _config; _setupRole(PAUSER_ROLE, owner); _setupRole(OWNER_ROLE, owner); _setRoleAdmin(PAUSER_ROLE, OWNER_ROLE); _setRoleAdmin(OWNER_ROLE, OWNER_ROLE); } /// @inheritdoc IPoolTokens function mint( MintParams calldata params, address to ) external virtual override onlyPool whenNotPaused returns (uint256 tokenId) { address poolAddress = _msgSender(); PoolInfo storage pool = pools[poolAddress]; pool.totalMinted = pool.totalMinted.add(params.principalAmount); tokenId = _createToken({ principalAmount: params.principalAmount, tranche: params.tranche, principalRedeemed: 0, interestRedeemed: 0, poolAddress: poolAddress, mintTo: to }); config.getBackerRewards().setPoolTokenAccRewardsPerPrincipalDollarAtMint(_msgSender(), tokenId); } /// @inheritdoc IPoolTokens function redeem( uint256 tokenId, uint256 principalRedeemed, uint256 interestRedeemed ) external virtual override onlyPool whenNotPaused { TokenInfo storage token = tokens[tokenId]; address poolAddr = token.pool; require(token.pool != address(0), "Invalid tokenId"); require(_msgSender() == poolAddr, "Only the token's pool can redeem"); PoolInfo storage pool = pools[poolAddr]; pool.totalPrincipalRedeemed = pool.totalPrincipalRedeemed.add(principalRedeemed); require(pool.totalPrincipalRedeemed <= pool.totalMinted, "Cannot redeem more than we minted"); token.principalRedeemed = token.principalRedeemed.add(principalRedeemed); require( token.principalRedeemed <= token.principalAmount, "Cannot redeem more than principal-deposited amount for token" ); token.interestRedeemed = token.interestRedeemed.add(interestRedeemed); emit TokenRedeemed( ownerOf(tokenId), poolAddr, tokenId, principalRedeemed, interestRedeemed, token.tranche ); } /** @notice reduce a given pool token's principalAmount and principalRedeemed by a specified amount * @dev uses safemath to prevent underflow * @dev this function is only intended for use as part of the v2.6.0 upgrade * to rectify a bug that allowed users to create a PoolToken that had a * larger amount of principal than they actually made available to the * borrower. This bug is fixed in v2.6.0 but still requires past pool tokens * to have their principal redeemed and deposited to be rectified. * @param tokenId id of token to decrease * @param amount amount to decrease by */ function reducePrincipalAmount(uint256 tokenId, uint256 amount) external onlyAdmin { TokenInfo storage tokenInfo = tokens[tokenId]; tokenInfo.principalAmount = tokenInfo.principalAmount.sub(amount); tokenInfo.principalRedeemed = tokenInfo.principalRedeemed.sub(amount); } /// @inheritdoc IPoolTokens function withdrawPrincipal( uint256 tokenId, uint256 principalAmount ) external virtual override onlyPool whenNotPaused { TokenInfo storage token = tokens[tokenId]; address poolAddr = token.pool; require(_msgSender() == poolAddr, "Invalid sender"); require(token.principalRedeemed == 0, "Token redeemed"); require(token.principalAmount >= principalAmount, "Insufficient principal"); PoolInfo storage pool = pools[poolAddr]; pool.totalMinted = pool.totalMinted.sub(principalAmount); require(pool.totalPrincipalRedeemed <= pool.totalMinted, "Cannot withdraw more than redeemed"); token.principalAmount = token.principalAmount.sub(principalAmount); emit TokenPrincipalWithdrawn( ownerOf(tokenId), poolAddr, tokenId, principalAmount, token.tranche ); } /// @inheritdoc IPoolTokens function burn(uint256 tokenId) external virtual override whenNotPaused { TokenInfo memory token = _getTokenInfo(tokenId); bool canBurn = _isApprovedOrOwner(_msgSender(), tokenId); bool fromTokenPool = _validPool(_msgSender()) && token.pool == _msgSender(); address owner = ownerOf(tokenId); require(canBurn || fromTokenPool, "ERC721Burnable: caller cannot burn this token"); require( token.principalRedeemed == token.principalAmount, "Can only burn fully redeemed tokens" ); // If we let you burn with claimable backer rewards then it would blackhole your rewards, // so you must claim all rewards before burning require(config.getBackerRewards().poolTokenClaimableRewards(tokenId) == 0, "rewards>0"); _destroyAndBurn(owner, address(token.pool), tokenId); } function getTokenInfo(uint256 tokenId) external view virtual override returns (TokenInfo memory) { return _getTokenInfo(tokenId); } function getPoolInfo(address pool) external view override returns (PoolInfo memory) { return pools[pool]; } /// @inheritdoc IPoolTokens function onPoolCreated(address newPool) external override onlyGoldfinchFactory { pools[newPool].created = true; } /** * @notice Returns a boolean representing whether the spender is the owner or the approved spender of the token * @param spender The address to check * @param tokenId The token id to check for * @return True if approved to redeem/transfer/burn the token, false if not */ function isApprovedOrOwner( address spender, uint256 tokenId ) external view override returns (bool) { return _isApprovedOrOwner(spender, tokenId); } /** * @inheritdoc IPoolTokens * @dev NA: Not Authorized * @dev IA: Invalid Amount - newPrincipal1 not in range (0, principalAmount) */ function splitToken( uint256 tokenId, uint256 newPrincipal1 ) external override returns (uint256 tokenId1, uint256 tokenId2) { require(_isApprovedOrOwner(msg.sender, tokenId), "NA"); TokenInfo memory tokenInfo = _getTokenInfo(tokenId); require(0 < newPrincipal1 && newPrincipal1 < tokenInfo.principalAmount, "IA"); IBackerRewards.BackerRewardsTokenInfo memory backerRewardsTokenInfo = config .getBackerRewards() .getTokenInfo(tokenId); IBackerRewards.StakingRewardsTokenInfo memory backerStakingRewardsTokenInfo = config .getBackerRewards() .getStakingRewardsTokenInfo(tokenId); // Burn the original token before calling out to other contracts to prevent possible reentrancy attacks. // A reentrancy guard on this function alone is insufficient because someone may be able to reenter the // protocol through a different contract that reads pool token metadata. Following checks-effects-interactions // here leads to a clunky implementation (fn's with many params) but guarding against potential reentrancy // is more important. address tokenOwner = ownerOf(tokenId); _destroyAndBurn(tokenOwner, address(tokenInfo.pool), tokenId); (tokenId1, tokenId2) = _createSplitTokens(tokenInfo, tokenOwner, newPrincipal1); _setBackerRewardsForSplitTokens( tokenInfo, backerRewardsTokenInfo, backerStakingRewardsTokenInfo, tokenId1, tokenId2, newPrincipal1 ); emit TokenSplit({ owner: tokenOwner, pool: tokenInfo.pool, tokenId: tokenId, newTokenId1: tokenId1, newPrincipal1: newPrincipal1, newTokenId2: tokenId2, newPrincipal2: tokenInfo.principalAmount.sub(newPrincipal1) }); } /// @notice Initialize the backer rewards metadata for split tokens function _setBackerRewardsForSplitTokens( TokenInfo memory tokenInfo, IBackerRewards.BackerRewardsTokenInfo memory backerRewardsTokenInfo, IBackerRewards.StakingRewardsTokenInfo memory stakingRewardsTokenInfo, uint256 newTokenId1, uint256 newTokenId2, uint256 newPrincipal1 ) internal { uint256 rewardsClaimed1 = backerRewardsTokenInfo.rewardsClaimed.mul(newPrincipal1).div( tokenInfo.principalAmount ); config.getBackerRewards().setBackerAndStakingRewardsTokenInfoOnSplit({ originalBackerRewardsTokenInfo: backerRewardsTokenInfo, originalStakingRewardsTokenInfo: stakingRewardsTokenInfo, newTokenId: newTokenId1, newRewardsClaimed: rewardsClaimed1 }); config.getBackerRewards().setBackerAndStakingRewardsTokenInfoOnSplit({ originalBackerRewardsTokenInfo: backerRewardsTokenInfo, originalStakingRewardsTokenInfo: stakingRewardsTokenInfo, newTokenId: newTokenId2, newRewardsClaimed: backerRewardsTokenInfo.rewardsClaimed.sub(rewardsClaimed1) }); } /// @notice Split tokenId into two new tokens. Assumes that newPrincipal1 is valid for the token's principalAmount function _createSplitTokens( TokenInfo memory tokenInfo, address tokenOwner, uint256 newPrincipal1 ) internal returns (uint256 newTokenId1, uint256 newTokenId2) { // All new vals are proportional to the new token's principal uint256 principalRedeemed1 = tokenInfo.principalRedeemed.mul(newPrincipal1).div( tokenInfo.principalAmount ); uint256 interestRedeemed1 = tokenInfo.interestRedeemed.mul(newPrincipal1).div( tokenInfo.principalAmount ); newTokenId1 = _createToken( newPrincipal1, tokenInfo.tranche, principalRedeemed1, interestRedeemed1, tokenInfo.pool, tokenOwner ); newTokenId2 = _createToken( tokenInfo.principalAmount.sub(newPrincipal1), tokenInfo.tranche, tokenInfo.principalRedeemed.sub(principalRedeemed1), tokenInfo.interestRedeemed.sub(interestRedeemed1), tokenInfo.pool, tokenOwner ); } /// @inheritdoc IPoolTokens function validPool(address sender) public view virtual override returns (bool) { return _validPool(sender); } /** * @notice Mint the token and save its metadata to storage * @param principalAmount token principal * @param tranche tranche of the pool to which the token belongs * @param principalRedeemed amount of principal already redeemed for the token. This is * 0 for tokens created from a deposit, and could be non-zero for tokens created from a split * @param interestRedeemed amount of interest already redeemed for the token. This is * 0 for tokens created from a deposit, and could be non-zero for tokens created from a split * @param poolAddress pool to which the token belongs * @param mintTo the token owner * @return tokenId id of the created token */ function _createToken( uint256 principalAmount, uint256 tranche, uint256 principalRedeemed, uint256 interestRedeemed, address poolAddress, address mintTo ) internal returns (uint256 tokenId) { _tokenIdTracker.increment(); tokenId = _tokenIdTracker.current(); tokens[tokenId] = TokenInfo({ pool: poolAddress, tranche: tranche, principalAmount: principalAmount, principalRedeemed: principalRedeemed, interestRedeemed: interestRedeemed }); _mint(mintTo, tokenId); emit TokenMinted({ owner: mintTo, pool: poolAddress, tokenId: tokenId, amount: principalAmount, tranche: tranche }); } function _destroyAndBurn(address owner, address pool, uint256 tokenId) internal { delete tokens[tokenId]; _burn(tokenId); config.getBackerRewards().clearTokenInfo(tokenId); emit TokenBurned(owner, pool, tokenId); } function _validPool(address poolAddress) internal view virtual returns (bool) { return pools[poolAddress].created; } function _getTokenInfo(uint256 tokenId) internal view returns (TokenInfo memory) { return tokens[tokenId]; } /// @notice Called with the sale price to determine how much royalty // is owed and to whom. /// @param _tokenId The NFT asset queried for royalty information /// @param _salePrice The sale price of the NFT asset specified by _tokenId /// @return receiver Address that should receive royalties /// @return royaltyAmount The royalty payment amount for _salePrice function royaltyInfo( uint256 _tokenId, uint256 _salePrice ) external view override returns (address, uint256) { return royaltyParams.royaltyInfo(_tokenId, _salePrice); } /// @notice Set royalty params used in `royaltyInfo`. This function is only callable by /// an address with `OWNER_ROLE`. /// @param newReceiver The new address which should receive royalties. See `receiver`. /// @param newRoyaltyPercent The new percent of `salePrice` that should be taken for royalties. /// See `royaltyPercent`. function setRoyaltyParams(address newReceiver, uint256 newRoyaltyPercent) external onlyAdmin { royaltyParams.setRoyaltyParams(newReceiver, newRoyaltyPercent); } function setBaseURI(string calldata baseURI_) external onlyAdmin { _setBaseURI(baseURI_); } function supportsInterface( bytes4 id ) public view override(ERC165UpgradeSafe, IERC165) returns (bool) { return (id == _INTERFACE_ID_ERC721 || id == _INTERFACE_ID_ERC721_METADATA || id == _INTERFACE_ID_ERC721_ENUMERABLE || id == _INTERFACE_ID_ERC165 || id == ConfigurableRoyaltyStandard._INTERFACE_ID_ERC2981); } modifier onlyGoldfinchFactory() { require(_msgSender() == config.goldfinchFactoryAddress(), "Only Goldfinch factory is allowed"); _; } modifier onlyPool() { require(_validPool(_msgSender()), "Invalid pool!"); _; } }
pragma solidity ^0.6.0; import "../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 GSN 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. */ contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; }
pragma solidity >=0.4.24 <0.7.0; /** * @title Initializable * * @dev Helper contract to support initializer functions. To use it, replace * the constructor with a function that has the `initializer` modifier. * WARNING: Unlike constructors, initializer functions must be manually * invoked. This applies both to deploying an Initializable contract, as well * as extending an Initializable contract via inheritance. * WARNING: When used with inheritance, manual care must be taken to not invoke * a parent initializer twice, or ensure that all initializers are idempotent, * because this is not dealt with automatically as with constructors. */ contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; }
pragma solidity ^0.6.0; import "../utils/EnumerableSet.sol"; import "../utils/Address.sol"; import "../GSN/Context.sol"; import "../Initializable.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, _msgSender())); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. */ abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe { function __AccessControl_init() internal initializer { __Context_init_unchained(); __AccessControl_init_unchained(); } function __AccessControl_init_unchained() internal initializer { } using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } uint256[49] private __gap; }
pragma solidity ^0.6.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when 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. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }
pragma solidity ^0.6.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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 `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool); /** * @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); }
pragma solidity ^0.6.2; /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @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"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } }
pragma solidity ^0.6.0; import "../math/SafeMath.sol"; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` * Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath} * overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never * directly accessed. */ library Counters { using SafeMath for uint256; struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { // The {SafeMath} overflow check can be skipped here, see the comment at the top counter._value += 1; } function decrement(Counter storage counter) internal { counter._value = counter._value.sub(1); } }
pragma solidity ^0.6.0; /** * @dev Library for managing an enumerable variant of Solidity's * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`] * type. * * Maps have the following properties: * * - Entries are added, removed, and checked for existence in constant time * (O(1)). * - Entries are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableMap for EnumerableMap.UintToAddressMap; * * // Declare a set state variable * EnumerableMap.UintToAddressMap private myMap; * } * ``` * * As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are * supported. */ library EnumerableMap { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Map type with // bytes32 keys and values. // The Map implementation uses private functions, and user-facing // implementations (such as Uint256ToAddressMap) are just wrappers around // the underlying Map. // This means that we can only create new EnumerableMaps for types that fit // in bytes32. struct MapEntry { bytes32 _key; bytes32 _value; } struct Map { // Storage of map keys and values MapEntry[] _entries; // Position of the entry defined by a key in the `entries` array, plus 1 // because index 0 means a key is not in the map. mapping (bytes32 => uint256) _indexes; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) { // Equivalent to !contains(map, key) map._entries.push(MapEntry({ _key: key, _value: value })); // The entry is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value map._indexes[key] = map._entries.length; return true; } else { map._entries[keyIndex - 1]._value = value; return false; } } /** * @dev Removes a key-value pair from a map. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function _remove(Map storage map, bytes32 key) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex != 0) { // Equivalent to contains(map, key) // To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one // in the array, and then remove the last entry (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = keyIndex - 1; uint256 lastIndex = map._entries.length - 1; // When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. MapEntry storage lastEntry = map._entries[lastIndex]; // Move the last entry to the index where the entry to delete is map._entries[toDeleteIndex] = lastEntry; // Update the index for the moved entry map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved entry was stored map._entries.pop(); // Delete the index for the deleted slot delete map._indexes[key]; return true; } else { return false; } } /** * @dev Returns true if the key is in the map. O(1). */ function _contains(Map storage map, bytes32 key) private view returns (bool) { return map._indexes[key] != 0; } /** * @dev Returns the number of key-value pairs in the map. O(1). */ function _length(Map storage map) private view returns (uint256) { return map._entries.length; } /** * @dev Returns the key-value pair stored at position `index` in the map. O(1). * * Note that there are no guarantees on the ordering of entries inside the * array, and it may change when more entries are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) { require(map._entries.length > index, "EnumerableMap: index out of bounds"); MapEntry storage entry = map._entries[index]; return (entry._key, entry._value); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function _get(Map storage map, bytes32 key) private view returns (bytes32) { return _get(map, key, "EnumerableMap: nonexistent key"); } /** * @dev Same as {_get}, with a custom error message when `key` is not in the map. */ function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } // UintToAddressMap struct UintToAddressMap { Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) { return _set(map._inner, bytes32(key), bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return _remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return _contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToAddressMap storage map) internal view returns (uint256) { return _length(map._inner); } /** * @dev Returns the element 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(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = _at(map._inner, index); return (uint256(key), address(uint256(value))); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key)))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. */ function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key), errorMessage))); } }
pragma solidity ^0.6.0; /** * @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 v3.0.0, only sets of type `address` (`AddressSet`) and `uint256` * (`UintSet`) are supported. */ 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; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. 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] = toDeleteIndex + 1; // All indexes are 1-based // 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) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // 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(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(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(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(uint256(_at(set._inner, index))); } // 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)); } }
pragma solidity ^0.6.0; import "../GSN/Context.sol"; import "../Initializable.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ contract PausableUpgradeSafe is Initializable, ContextUpgradeSafe { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ function __Pausable_init() internal initializer { __Context_init_unchained(); __Pausable_init_unchained(); } function __Pausable_init_unchained() internal initializer { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Triggers stopped state. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } uint256[49] private __gap; }
pragma solidity ^0.6.0; import "../Initializable.sol"; /** * @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]. */ contract ReentrancyGuardUpgradeSafe is Initializable { bool private _notEntered; function __ReentrancyGuard_init() internal initializer { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal initializer { // Storing an initial 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 percetange 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. _notEntered = true; } /** * @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 make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_notEntered, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _notEntered = false; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _notEntered = true; } uint256[49] private __gap; }
pragma solidity ^0.6.0; /** * @dev String operations. */ library Strings { /** * @dev Converts a `uint256` to its ASCII `string` representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); uint256 index = digits - 1; temp = value; while (temp != 0) { buffer[index--] = byte(uint8(48 + temp % 10)); temp /= 10; } return string(buffer); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 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"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(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) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // solhint-disable /* Vendored from @openzeppelin/[email protected] Alterations: * Make supportsInterface virtual so it can be overriden by inheriting contracts */ pragma solidity ^0.6.0; import "../interfaces/openzeppelin/IERC165.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ contract ERC165UpgradeSafe is Initializable, IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; function __ERC165_init() internal initializer { __ERC165_init_unchained(); } function __ERC165_init_unchained() internal initializer { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // solhint-disable /* Vendored from @openzeppelin/[email protected] Alterations: * Use vendored ERC165 with virtual supportsInterface */ pragma solidity ^0.6.0; import "@openzeppelin/contracts-ethereum-package/contracts/GSN/Context.sol"; import "../interfaces/openzeppelin/IERC721.sol"; import "../interfaces/openzeppelin/IERC721Metadata.sol"; import "../interfaces/openzeppelin/IERC721Enumerable.sol"; import "../interfaces/openzeppelin/IERC721Receiver.sol"; import "./ERC165.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/utils/Address.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/utils/EnumerableSet.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/utils/EnumerableMap.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/utils/Strings.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol"; /** * @title ERC721 Non-Fungible Token Standard basic implementation * @dev see https://eips.ethereum.org/EIPS/eip-721 */ contract ERC721UpgradeSafe is Initializable, ContextUpgradeSafe, ERC165UpgradeSafe, IERC721, IERC721Metadata, IERC721Enumerable { using SafeMath for uint256; using Address for address; using EnumerableSet for EnumerableSet.UintSet; using EnumerableMap for EnumerableMap.UintToAddressMap; using Strings for uint256; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector` bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; // Mapping from holder address to their (enumerable) set of owned tokens mapping(address => EnumerableSet.UintSet) private _holderTokens; // Enumerable mapping from token ids to their owners EnumerableMap.UintToAddressMap private _tokenOwners; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; // Token name string private _name; // Token symbol string private _symbol; // Optional mapping for token URIs mapping(uint256 => string) private _tokenURIs; // Base URI string private _baseURI; /* * bytes4(keccak256('balanceOf(address)')) == 0x70a08231 * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3 * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde * * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^ * 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd */ bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; /* * bytes4(keccak256('name()')) == 0x06fdde03 * bytes4(keccak256('symbol()')) == 0x95d89b41 * bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd * * => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f */ bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; /* * bytes4(keccak256('totalSupply()')) == 0x18160ddd * bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59 * bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7 * * => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63 */ bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; function __ERC721_init(string memory name, string memory symbol) internal initializer { __Context_init_unchained(); __ERC165_init_unchained(); __ERC721_init_unchained(name, symbol); } function __ERC721_init_unchained(string memory name, string memory symbol) internal initializer { _name = name; _symbol = symbol; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721); _registerInterface(_INTERFACE_ID_ERC721_METADATA); _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE); } /** * @dev Gets the balance of the specified address. * @param owner address to query the balance of * @return uint256 representing the amount owned by the passed address */ function balanceOf(address owner) public view override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _holderTokens[owner].length(); } /** * @dev Gets the owner of the specified token ID. * @param tokenId uint256 ID of the token to query the owner of * @return address currently marked as the owner of the given token ID */ function ownerOf(uint256 tokenId) public view override returns (address) { return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token"); } /** * @dev Gets the token name. * @return string representing the token name */ function name() public view override returns (string memory) { return _name; } /** * @dev Gets the token symbol. * @return string representing the token symbol */ function symbol() public view override returns (string memory) { return _symbol; } /** * @dev Returns the URI for a given token ID. May return an empty string. * * If a base URI is set (via {_setBaseURI}), it is added as a prefix to the * token's own URI (via {_setTokenURI}). * * If there is a base URI but no token URI, the token's ID will be used as * its URI when appending it to the base URI. This pattern for autogenerated * token URIs can lead to large gas savings. * * .Examples * |=== * |`_setBaseURI()` |`_setTokenURI()` |`tokenURI()` * | "" * | "" * | "" * | "" * | "token.uri/123" * | "token.uri/123" * | "token.uri/" * | "123" * | "token.uri/123" * | "token.uri/" * | "" * | "token.uri/<tokenId>" * |=== * * Requirements: * * - `tokenId` must exist. */ function tokenURI(uint256 tokenId) public view override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory _tokenURI = _tokenURIs[tokenId]; // If there is no base URI, return the token URI. if (bytes(_baseURI).length == 0) { return _tokenURI; } // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked). if (bytes(_tokenURI).length > 0) { return string(abi.encodePacked(_baseURI, _tokenURI)); } // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI. return string(abi.encodePacked(_baseURI, tokenId.toString())); } /** * @dev Returns the base URI set via {_setBaseURI}. This will be * automatically added as a prefix in {tokenURI} to each token's URI, or * to the token ID if no specific URI is set for that token ID. */ function baseURI() public view returns (string memory) { return _baseURI; } /** * @dev Gets the token ID at a given index of the tokens list of the requested owner. * @param owner address owning the tokens list to be accessed * @param index uint256 representing the index to be accessed of the requested tokens list * @return uint256 token ID at the given index of the tokens list owned by the requested address */ function tokenOfOwnerByIndex( address owner, uint256 index ) public view override returns (uint256) { return _holderTokens[owner].at(index); } /** * @dev Gets the total amount of tokens stored by the contract. * @return uint256 representing the total amount of tokens */ function totalSupply() public view override returns (uint256) { // _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds return _tokenOwners.length(); } /** * @dev Gets the token ID at a given index of all the tokens in this contract * Reverts if the index is greater or equal to the total number of tokens. * @param index uint256 representing the index to be accessed of the tokens list * @return uint256 token ID at the given index of the tokens list */ function tokenByIndex(uint256 index) public view override returns (uint256) { (uint256 tokenId, ) = _tokenOwners.at(index); return tokenId; } /** * @dev Approves another address to transfer the given token ID * The zero address indicates there is no approved address. * There can only be one approved address per token at a given time. * Can only be called by the token owner or an approved operator. * @param to address to be approved for the given token ID * @param tokenId uint256 ID of the token to be approved */ function approve(address to, uint256 tokenId) public virtual override { address owner = ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev Gets the approved address for a token ID, or zero if no address set * Reverts if the token ID does not exist. * @param tokenId uint256 ID of the token to query the approval of * @return address currently approved for the given token ID */ function getApproved(uint256 tokenId) public view override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev Sets or unsets the approval of a given operator * An operator is allowed to transfer all tokens of the sender on their behalf. * @param operator operator address to set the approval * @param approved representing the status of the approval to be set */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev Tells whether an operator is approved by a given owner. * @param owner owner address which you want to query the approval of * @param operator operator address which you want to query the approval of * @return bool whether the given operator is approved by the given owner */ function isApprovedForAll(address owner, address operator) public view override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev Transfers the ownership of a given token ID to another address. * Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * Requires the msg.sender to be the owner, approved, or operator. * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function transferFrom(address from, address to, uint256 tokenId) public virtual override { //solhint-disable-next-line max-line-length require( _isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved" ); _transfer(from, to, tokenId); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement {IERC721Receiver-onERC721Received}, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the msg.sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement {IERC721Receiver-onERC721Received}, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the _msgSender() to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred * @param _data bytes data to send along with a safe transfer check */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require( _isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved" ); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the msg.sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred * @param _data bytes data to send along with a safe transfer check */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require( _checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Returns whether the specified token exists. * @param tokenId uint256 ID of the token to query the existence of * @return bool whether the token exists */ function _exists(uint256 tokenId) internal view returns (bool) { return _tokenOwners.contains(tokenId); } /** * @dev Returns whether the given spender can transfer a given token ID. * @param spender address of the spender to query * @param tokenId uint256 ID of the token to be transferred * @return bool whether the msg.sender is approved for the given token ID, * is an operator of the owner, or is the owner of the token */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Internal function to safely mint a new token. * Reverts if the given token ID already exists. * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Internal function to safely mint a new token. * Reverts if the given token ID already exists. * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted * @param _data bytes data to send along with a safe transfer check */ function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Internal function to mint a new token. * Reverts if the given token ID already exists. * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(address(0), to, tokenId); } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * @param tokenId uint256 ID of the token being burned */ function _burn(uint256 tokenId) internal virtual { address owner = ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); // Clear metadata (if any) if (bytes(_tokenURIs[tokenId]).length != 0) { delete _tokenURIs[tokenId]; } _holderTokens[owner].remove(tokenId); _tokenOwners.remove(tokenId); emit Transfer(owner, address(0), tokenId); } /** * @dev Internal function to transfer ownership of a given token ID to another address. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function _transfer(address from, address to, uint256 tokenId) internal virtual { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _holderTokens[from].remove(tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(from, to, tokenId); } /** * @dev Internal function to set the token URI for a given token. * * Reverts if the token ID does not exist. * * TIP: If all token IDs share a prefix (for example, if your URIs look like * `https://api.myproject.com/token/<id>`), use {_setBaseURI} to store * it and save gas. */ function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual { require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token"); _tokenURIs[tokenId] = _tokenURI; } /** * @dev Internal function to set the base URI for all token IDs. It is * automatically added as a prefix to the value returned in {tokenURI}, * or to the token ID if {tokenURI} is empty. */ function _setBaseURI(string memory baseURI_) internal virtual { _baseURI = baseURI_; } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (!to.isContract()) { return true; } // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = to.call( abi.encodeWithSelector( IERC721Receiver(to).onERC721Received.selector, _msgSender(), from, tokenId, _data ) ); if (!success) { if (returndata.length > 0) { // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert("ERC721: transfer to non ERC721Receiver implementer"); } } else { bytes4 retval = abi.decode(returndata, (bytes4)); return (retval == _ERC721_RECEIVED); } } function _approve(address to, uint256 tokenId) private { _tokenApprovals[tokenId] = to; emit Approval(ownerOf(tokenId), to, tokenId); } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - when `from` is zero, `tokenId` will be minted for `to`. * - when `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual {} uint256[41] private __gap; }
// SPDX-License-Identifier: MIT // solhint-disable /* Vendored from @openzeppelin/[email protected] Alterations: * Use vendored ERC721, which inherits from vendored ERC165 with virtual supportsInterface */ pragma solidity ^0.6.0; import "./ERC721.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/utils/Pausable.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol"; /** * @dev ERC721 token with pausable token transfers, minting and burning. * * Useful for scenarios such as preventing trades until the end of an evaluation * period, or having an emergency switch for freezing all token transfers in the * event of a large bug. */ abstract contract ERC721PausableUpgradeSafe is Initializable, ERC721UpgradeSafe, PausableUpgradeSafe { function __ERC721Pausable_init() internal initializer { __Context_init_unchained(); __ERC165_init_unchained(); __Pausable_init_unchained(); __ERC721Pausable_init_unchained(); } function __ERC721Pausable_init_unchained() internal initializer {} /** * @dev See {ERC721-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); require(!paused(), "ERC721Pausable: token transfer while paused"); } uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // solhint-disable /* This is copied from OZ preset: https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/release-v3.0.0/contracts/presets/ERC721PresetMinterPauserAutoId.sol Alterations: * Make the counter public, so that we can use it in our custom mint function * Removed ERC721Burnable parent contract, but added our own custom burn function. * Removed original "mint" function, because we have a custom one. * Removed default initialization functions, because they set msg.sender as the owner, which we do not want, because we use a deployer account, which is separate from the protocol owner. */ pragma solidity 0.6.12; import "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/GSN/Context.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/utils/Counters.sol"; import "./ERC721Pausable.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol"; /** * @dev {ERC721} token, including: * * - ability for holders to burn (destroy) their tokens * - a minter role that allows for token minting (creation) * - a pauser role that allows to stop all token transfers * - token ID and URI autogeneration * * This contract uses {AccessControl} to lock permissioned functions using the * different roles - head to its documentation for details. * * The account that deploys the contract will be granted the minter and pauser * roles, as well as the default admin role, which will let it grant both minter * and pauser roles to aother accounts */ contract ERC721PresetMinterPauserAutoIdUpgradeSafe is Initializable, ContextUpgradeSafe, AccessControlUpgradeSafe, ERC721PausableUpgradeSafe { using Counters for Counters.Counter; bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE"); Counters.Counter public _tokenIdTracker; /** * @dev Pauses all token transfers. * * See {ERC721Pausable} and {Pausable-_pause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function pause() public { require( hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to pause" ); _pause(); } /** * @dev Unpauses all token transfers. * * See {ERC721Pausable} and {Pausable-_unpause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function unpause() public { require( hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to unpause" ); _unpause(); } function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override(ERC721PausableUpgradeSafe) { super._beforeTokenTransfer(from, to, tokenId); } uint256[49] private __gap; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import {ITranchedPool} from "./ITranchedPool.sol"; interface IBackerRewards { struct BackerRewardsTokenInfo { uint256 rewardsClaimed; // gfi claimed uint256 accRewardsPerPrincipalDollarAtMint; // Pool's accRewardsPerPrincipalDollar at PoolToken mint() } struct BackerRewardsInfo { uint256 accRewardsPerPrincipalDollar; // accumulator gfi per interest dollar } /// @notice Staking rewards parameters relevant to a TranchedPool struct StakingRewardsPoolInfo { // @notice the value `StakingRewards.accumulatedRewardsPerToken()` at the last checkpoint uint256 accumulatedRewardsPerTokenAtLastCheckpoint; // @notice last time the rewards info was updated // // we need this in order to know how much to pro rate rewards after the term is over. uint256 lastUpdateTime; // @notice staking rewards parameters for each slice of the tranched pool StakingRewardsSliceInfo[] slicesInfo; } /// @notice Staking rewards paramters relevant to a TranchedPool slice struct StakingRewardsSliceInfo { // @notice fidu share price when the slice is first drawn down // // we need to save this to calculate what an equivalent position in // the senior pool would be at the time the slice is downdown uint256 fiduSharePriceAtDrawdown; // @notice the amount of principal deployed at the last checkpoint // // we use this to calculate the amount of principal that should // acctually accrue rewards during between the last checkpoint and // and subsequent updates uint256 principalDeployedAtLastCheckpoint; // @notice the value of StakingRewards.accumulatedRewardsPerToken() at time of drawdown // // we need to keep track of this to use this as a base value to accumulate rewards // for tokens. If the token has never claimed staking rewards, we use this value // and the current staking rewards accumulator uint256 accumulatedRewardsPerTokenAtDrawdown; // @notice amount of rewards per token accumulated over the lifetime of the slice that a backer // can claim uint256 accumulatedRewardsPerTokenAtLastCheckpoint; // @notice the amount of rewards per token accumulated over the lifetime of the slice // // this value is "unrealized" because backers will be unable to claim against this value. // we keep this value so that we can always accumulate rewards for the amount of capital // deployed at any point in time, but not allow backers to withdraw them until a payment // is made. For example: we want to accumulate rewards when a backer does a drawdown. but // a backer shouldn't be allowed to claim rewards until a payment is made. // // this value is scaled depending on the current proportion of capital currently deployed // in the slice. For example, if the staking rewards contract accrued 10 rewards per token // between the current checkpoint and a new update, and only 20% of the capital was deployed // during that period, we would accumulate 2 (10 * 20%) rewards. uint256 unrealizedAccumulatedRewardsPerTokenAtLastCheckpoint; } /// @notice Staking rewards parameters relevant to a PoolToken struct StakingRewardsTokenInfo { // @notice the amount of rewards accumulated the last time a token's rewards were withdrawn uint256 accumulatedRewardsPerTokenAtLastWithdraw; } /// @notice total amount of GFI rewards available, times 1e18 function totalRewards() external view returns (uint256); /// @notice interest $ eligible for gfi rewards, times 1e18 function maxInterestDollarsEligible() external view returns (uint256); /// @notice counter of total interest repayments, times 1e6 function totalInterestReceived() external view returns (uint256); /// @notice totalRewards/totalGFISupply * 100, times 1e18 function totalRewardPercentOfTotalGFI() external view returns (uint256); /// @notice Get backer rewards metadata for a pool token function getTokenInfo(uint256 poolTokenId) external view returns (BackerRewardsTokenInfo memory); /// @notice Get backer staking rewards metadata for a pool token function getStakingRewardsTokenInfo( uint256 poolTokenId ) external view returns (StakingRewardsTokenInfo memory); /// @notice Get backer staking rewards for a pool function getBackerStakingRewardsPoolInfo( ITranchedPool pool ) external view returns (StakingRewardsPoolInfo memory); /// @notice Calculates the accRewardsPerPrincipalDollar for a given pool, /// when a interest payment is received by the protocol /// @param _interestPaymentAmount Atomic usdc amount of the interest payment function allocateRewards(uint256 _interestPaymentAmount) external; /// @notice callback for TranchedPools when they drawdown /// @param sliceIndex index of the tranched pool slice /// @dev initializes rewards info for the calling TranchedPool if it's the first /// drawdown for the given slice function onTranchedPoolDrawdown(uint256 sliceIndex) external; /// @notice When a pool token is minted for multiple drawdowns, /// set accRewardsPerPrincipalDollarAtMint to the current accRewardsPerPrincipalDollar price /// @param poolAddress Address of the pool associated with the pool token /// @param tokenId Pool token id function setPoolTokenAccRewardsPerPrincipalDollarAtMint( address poolAddress, uint256 tokenId ) external; /// @notice PoolToken request to withdraw all allocated rewards /// @param tokenId Pool token id /// @return amount of rewards withdrawn function withdraw(uint256 tokenId) external returns (uint256); /** * @notice Set BackerRewards and BackerStakingRewards metadata for tokens created by a pool token split. * @param originalBackerRewardsTokenInfo backer rewards info for the pool token that was split * @param originalStakingRewardsTokenInfo backer staking rewards info for the pool token that was split * @param newTokenId id of one of the tokens in the split * @param newRewardsClaimed rewardsClaimed value for the new token. */ function setBackerAndStakingRewardsTokenInfoOnSplit( BackerRewardsTokenInfo memory originalBackerRewardsTokenInfo, StakingRewardsTokenInfo memory originalStakingRewardsTokenInfo, uint256 newTokenId, uint256 newRewardsClaimed ) external; /** * @notice Calculate the gross available gfi rewards for a PoolToken * @param tokenId Pool token id * @return The amount of GFI claimable */ function poolTokenClaimableRewards(uint256 tokenId) external view returns (uint256); /// @notice Clear all BackerRewards and StakingRewards associated data for `tokenId` function clearTokenInfo(uint256 tokenId) external; }
// SPDX-License-Identifier: MIT // Taken from https://github.com/compound-finance/compound-protocol/blob/master/contracts/CTokenInterfaces.sol pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import "./IERC20withDec.sol"; interface ICUSDCContract is IERC20withDec { /*** User Interface ***/ function mint(uint256 mintAmount) external returns (uint256); function redeem(uint256 redeemTokens) external returns (uint256); function redeemUnderlying(uint256 redeemAmount) external returns (uint256); function borrow(uint256 borrowAmount) external returns (uint256); function repayBorrow(uint256 repayAmount) external returns (uint256); function repayBorrowBehalf(address borrower, uint256 repayAmount) external returns (uint256); function liquidateBorrow( address borrower, uint256 repayAmount, address cTokenCollateral ) external returns (uint256); function getAccountSnapshot( address account ) external view returns (uint256, uint256, uint256, uint256); function balanceOfUnderlying(address owner) external returns (uint256); function exchangeRateCurrent() external returns (uint256); /*** Admin Functions ***/ function _addReserves(uint256 addAmount) external returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; interface ICreditLine { function borrower() external view returns (address); function limit() external view returns (uint256); function maxLimit() external view returns (uint256); function interestApr() external view returns (uint256); function paymentPeriodInDays() external view returns (uint256); function principalGracePeriodInDays() external view returns (uint256); function termInDays() external view returns (uint256); function lateFeeApr() external view returns (uint256); function isLate() external view returns (bool); function withinPrincipalGracePeriod() external view returns (bool); // Accounting variables function balance() external view returns (uint256); function interestOwed() external view returns (uint256); function principalOwed() external view returns (uint256); function termEndTime() external view returns (uint256); function nextDueTime() external view returns (uint256); function interestAccruedAsOf() external view returns (uint256); function lastFullPaymentTime() external view returns (uint256); }
// SPDX-License-Identifier: MIT // Taken from https://github.com/compound-finance/compound-protocol/blob/master/contracts/CTokenInterfaces.sol pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; interface ICurveLP { function coins(uint256) external view returns (address); function token() external view returns (address); function calc_token_amount(uint256[2] calldata amounts) external view returns (uint256); function lp_price() external view returns (uint256); function add_liquidity( uint256[2] calldata amounts, uint256 min_mint_amount, bool use_eth, address receiver ) external returns (uint256); function remove_liquidity( uint256 _amount, uint256[2] calldata min_amounts ) external returns (uint256); function remove_liquidity_one_coin( uint256 token_amount, uint256 i, uint256 min_amount ) external returns (uint256); function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256); function exchange(uint256 i, uint256 j, uint256 dx, uint256 min_dy) external returns (uint256); function balances(uint256 arg0) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import {IERC20} from "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol"; /* Only addition is the `decimals` function, which we need, and which both our Fidu and USDC use, along with most ERC20's. */ /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20withDec is IERC20 { /** * @dev Returns the number of decimals used for the token */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; interface IERC2981 { /// @notice Called with the sale price to determine how much royalty // is owed and to whom. /// @param _tokenId - the NFT asset queried for royalty information /// @param _salePrice - the sale price of the NFT asset specified by _tokenId /// @return receiver - address of who should be sent the royalty payment /// @return royaltyAmount - the royalty payment amount for _salePrice function royaltyInfo( uint256 _tokenId, uint256 _salePrice ) external view returns (address receiver, uint256 royaltyAmount); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import "./IERC20withDec.sol"; interface IFidu is IERC20withDec { function mintTo(address to, uint256 amount) external; function burnFrom(address to, uint256 amount) external; function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; abstract contract IGo { uint256 public constant ID_TYPE_0 = 0; uint256 public constant ID_TYPE_1 = 1; uint256 public constant ID_TYPE_2 = 2; uint256 public constant ID_TYPE_3 = 3; uint256 public constant ID_TYPE_4 = 4; uint256 public constant ID_TYPE_5 = 5; uint256 public constant ID_TYPE_6 = 6; uint256 public constant ID_TYPE_7 = 7; uint256 public constant ID_TYPE_8 = 8; uint256 public constant ID_TYPE_9 = 9; uint256 public constant ID_TYPE_10 = 10; /// @notice Returns the address of the UniqueIdentity contract. function uniqueIdentity() external virtual returns (address); function go(address account) public view virtual returns (bool); function goOnlyIdTypes( address account, uint256[] calldata onlyIdTypes ) public view virtual returns (bool); /** * @notice Returns whether the provided account is go-listed for use of the SeniorPool on the Goldfinch protocol. * @param account The account whose go status to obtain * @return true if `account` is go listed */ function goSeniorPool(address account) public view virtual returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; interface IGoldfinchConfig { function getNumber(uint256 index) external returns (uint256); function getAddress(uint256 index) external returns (address); function setAddress(uint256 index, address newAddress) external returns (address); function setNumber(uint256 index, uint256 newNumber) external returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; interface IGoldfinchFactory { function createCreditLine() external returns (address); function createBorrower(address owner) external returns (address); function createPool( address _borrower, uint256 _juniorFeePercent, uint256 _limit, uint256 _interestApr, uint256 _paymentPeriodInDays, uint256 _termInDays, uint256 _lateFeeApr, uint256[] calldata _allowedUIDTypes ) external returns (address); function createMigratedPool( address _borrower, uint256 _juniorFeePercent, uint256 _limit, uint256 _interestApr, uint256 _paymentPeriodInDays, uint256 _termInDays, uint256 _lateFeeApr, uint256[] calldata _allowedUIDTypes ) external returns (address); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import "./openzeppelin/IERC721.sol"; interface IPoolTokens is IERC721 { struct TokenInfo { address pool; uint256 tranche; uint256 principalAmount; uint256 principalRedeemed; uint256 interestRedeemed; } struct MintParams { uint256 principalAmount; uint256 tranche; } struct PoolInfo { uint256 totalMinted; uint256 totalPrincipalRedeemed; bool created; } /** * @notice Called by pool to create a debt position in a particular tranche and amount * @param params Struct containing the tranche and the amount * @param to The address that should own the position * @return tokenId The token ID (auto-incrementing integer across all pools) */ function mint(MintParams calldata params, address to) external returns (uint256); /** * @notice Redeem principal and interest on a pool token. Called by valid pools as part of their redemption * flow * @param tokenId pool token id * @param principalRedeemed principal to redeem. This cannot exceed the token's principal amount, and * the redemption cannot cause the pool's total principal redeemed to exceed the pool's total minted * principal * @param interestRedeemed interest to redeem. */ function redeem(uint256 tokenId, uint256 principalRedeemed, uint256 interestRedeemed) external; /** * @notice Withdraw a pool token's principal up to the token's principalAmount. Called by valid pools * as part of their withdraw flow before the pool is locked (i.e. before the principal is committed) * @param tokenId pool token id * @param principalAmount principal to withdraw */ function withdrawPrincipal(uint256 tokenId, uint256 principalAmount) external; /** * @notice Burns a specific ERC721 token and removes deletes the token metadata for PoolTokens, BackerReards, * and BackerStakingRewards * @param tokenId uint256 id of the ERC721 token to be burned. */ function burn(uint256 tokenId) external; /** * @notice Called by the GoldfinchFactory to register the pool as a valid pool. Only valid pools can mint/redeem * tokens * @param newPool The address of the newly created pool */ function onPoolCreated(address newPool) external; function getTokenInfo(uint256 tokenId) external view returns (TokenInfo memory); function getPoolInfo(address pool) external view returns (PoolInfo memory); /// @notice Query if `pool` is a valid pool. A pool is valid if it was created by the Goldfinch Factory function validPool(address pool) external view returns (bool); function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool); /** * @notice Splits a pool token into two smaller positions. The original token is burned and all * its associated data is deleted. * @param tokenId id of the token to split. * @param newPrincipal1 principal amount for the first token in the split. The principal amount for the * second token in the split is implicitly the original token's principal amount less newPrincipal1 * @return tokenId1 id of the first token in the split * @return tokenId2 id of the second token in the split */ function splitToken( uint256 tokenId, uint256 newPrincipal1 ) external returns (uint256 tokenId1, uint256 tokenId2); /** * @notice Mint event emitted for a new TranchedPool deposit or when an existing pool token is * split * @param owner address to which the token was minted * @param pool tranched pool that the deposit was in * @param tokenId ERC721 tokenId * @param amount the deposit amount * @param tranche id of the tranche of the deposit */ event TokenMinted( address indexed owner, address indexed pool, uint256 indexed tokenId, uint256 amount, uint256 tranche ); /** * @notice Redeem event emitted when interest and/or principal is redeemed in the token's pool * @param owner owner of the pool token * @param pool tranched pool that the token belongs to * @param principalRedeemed amount of principal redeemed from the pool * @param interestRedeemed amount of interest redeemed from the pool * @param tranche id of the tranche the token belongs to */ event TokenRedeemed( address indexed owner, address indexed pool, uint256 indexed tokenId, uint256 principalRedeemed, uint256 interestRedeemed, uint256 tranche ); /** * @notice Burn event emitted when the token owner/operator manually burns the token or burns * it implicitly by splitting it * @param owner owner of the pool token * @param pool tranched pool that the token belongs to */ event TokenBurned(address indexed owner, address indexed pool, uint256 indexed tokenId); /** * @notice Split event emitted when the token owner/operator splits the token * @param pool tranched pool to which the orginal and split tokens belong * @param tokenId id of the original token that was split * @param newTokenId1 id of the first split token * @param newPrincipal1 principalAmount of the first split token * @param newTokenId2 id of the second split token * @param newPrincipal2 principalAmount of the second split token */ event TokenSplit( address indexed owner, address indexed pool, uint256 indexed tokenId, uint256 newTokenId1, uint256 newPrincipal1, uint256 newTokenId2, uint256 newPrincipal2 ); /** * @notice Principal Withdrawn event emitted when a token's principal is withdrawn from the pool * BEFORE the pool's drawdown period * @param pool tranched pool of the token * @param principalWithdrawn amount of principal withdrawn from the pool */ event TokenPrincipalWithdrawn( address indexed owner, address indexed pool, uint256 indexed tokenId, uint256 principalWithdrawn, uint256 tranche ); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import {ITranchedPool} from "./ITranchedPool.sol"; import {ISeniorPoolEpochWithdrawals} from "./ISeniorPoolEpochWithdrawals.sol"; abstract contract ISeniorPool is ISeniorPoolEpochWithdrawals { uint256 public sharePrice; uint256 public totalLoansOutstanding; uint256 public totalWritedowns; function deposit(uint256 amount) external virtual returns (uint256 depositShares); function depositWithPermit( uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external virtual returns (uint256 depositShares); /** * @notice Withdraw `usdcAmount` of USDC, bypassing the epoch withdrawal system. Callable * by Zapper only. */ function withdraw(uint256 usdcAmount) external virtual returns (uint256 amount); /** * @notice Withdraw `fiduAmount` of FIDU converted to USDC at the current share price, * bypassing the epoch withdrawal system. Callable by Zapper only */ function withdrawInFidu(uint256 fiduAmount) external virtual returns (uint256 amount); function invest(ITranchedPool pool) external virtual returns (uint256); function estimateInvestment(ITranchedPool pool) external view virtual returns (uint256); function redeem(uint256 tokenId) external virtual; function writedown(uint256 tokenId) external virtual; function calculateWritedown( uint256 tokenId ) external view virtual returns (uint256 writedownAmount); function sharesOutstanding() external view virtual returns (uint256); function assets() external view virtual returns (uint256); function getNumShares(uint256 amount) public view virtual returns (uint256); event DepositMade(address indexed capitalProvider, uint256 amount, uint256 shares); event WithdrawalMade(address indexed capitalProvider, uint256 userAmount, uint256 reserveAmount); event InterestCollected(address indexed payer, uint256 amount); event PrincipalCollected(address indexed payer, uint256 amount); event ReserveFundsCollected(address indexed user, uint256 amount); event ReserveSharesCollected(address indexed user, address indexed reserve, uint256 amount); event PrincipalWrittenDown(address indexed tranchedPool, int256 amount); event InvestmentMadeInSenior(address indexed tranchedPool, uint256 amount); event InvestmentMadeInJunior(address indexed tranchedPool, uint256 amount); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; interface ISeniorPoolEpochWithdrawals { /** * @notice A withdrawal epoch * @param endsAt timestamp the epoch ends * @param fiduRequested amount of fidu requested in the epoch, including fidu * carried over from previous epochs * @param fiduLiquidated Amount of fidu that was liquidated at the end of this epoch * @param usdcAllocated Amount of usdc that was allocated to liquidate fidu. * Does not consider withdrawal fees. */ struct Epoch { uint256 endsAt; uint256 fiduRequested; uint256 fiduLiquidated; uint256 usdcAllocated; } /** * @notice A user's request for withdrawal * @param epochCursor id of next epoch the user can liquidate their request * @param fiduRequested amount of fidu left to liquidate since last checkpoint * @param usdcWithdrawable amount of usdc available for a user to withdraw */ struct WithdrawalRequest { uint256 epochCursor; uint256 usdcWithdrawable; uint256 fiduRequested; } /** * @notice Returns the amount of unallocated usdc in the senior pool, taking into account * usdc that _will_ be allocated to withdrawals when a checkpoint happens */ function usdcAvailable() external view returns (uint256); /// @notice Current duration of withdrawal epochs, in seconds function epochDuration() external view returns (uint256); /// @notice Update epoch duration function setEpochDuration(uint256 newEpochDuration) external; /// @notice The current withdrawal epoch function currentEpoch() external view returns (Epoch memory); /// @notice Get request by tokenId. A request is considered active if epochCursor > 0. function withdrawalRequest(uint256 tokenId) external view returns (WithdrawalRequest memory); /** * @notice Submit a request to withdraw `fiduAmount` of FIDU. Request is rejected * if caller already owns a request token. A non-transferrable request token is * minted to the caller * @return tokenId token minted to caller */ function requestWithdrawal(uint256 fiduAmount) external returns (uint256 tokenId); /** * @notice Add `fiduAmount` FIDU to a withdrawal request for `tokenId`. Caller * must own tokenId */ function addToWithdrawalRequest(uint256 fiduAmount, uint256 tokenId) external; /** * @notice Cancel request for tokenId. The fiduRequested (minus a fee) is returned * to the caller. Caller must own tokenId. * @return fiduReceived the fidu amount returned to the caller */ function cancelWithdrawalRequest(uint256 tokenId) external returns (uint256 fiduReceived); /** * @notice Transfer the usdcWithdrawable of request for tokenId to the caller. * Caller must own tokenId */ function claimWithdrawalRequest(uint256 tokenId) external returns (uint256 usdcReceived); /// @notice Emitted when the epoch duration is changed event EpochDurationChanged(uint256 newDuration); /// @notice Emitted when a new withdraw request has been created event WithdrawalRequested( uint256 indexed epochId, uint256 indexed tokenId, address indexed operator, uint256 fiduRequested ); /// @notice Emitted when a user adds to their existing withdraw request /// @param epochId epoch that the withdraw was added to /// @param tokenId id of token that represents the position being added to /// @param operator address that added to the request /// @param fiduRequested amount of additional fidu added to request event WithdrawalAddedTo( uint256 indexed epochId, uint256 indexed tokenId, address indexed operator, uint256 fiduRequested ); /// @notice Emitted when a withdraw request has been canceled event WithdrawalCanceled( uint256 indexed epochId, uint256 indexed tokenId, address indexed operator, uint256 fiduCanceled, uint256 reserveFidu ); /// @notice Emitted when an epoch has been checkpointed /// @param epochId id of epoch that ended /// @param endTime timestamp the epoch ended /// @param fiduRequested amount of FIDU oustanding when the epoch ended /// @param usdcAllocated amount of USDC allocated to liquidate FIDU /// @param fiduLiquidated amount of FIDU liquidated using `usdcAllocated` event EpochEnded( uint256 indexed epochId, uint256 endTime, uint256 fiduRequested, uint256 usdcAllocated, uint256 fiduLiquidated ); /// @notice Emitted when an epoch could not be finalized and is extended instead /// @param epochId id of epoch that was extended /// @param newEndTime new epoch end time /// @param oldEndTime previous epoch end time event EpochExtended(uint256 indexed epochId, uint256 newEndTime, uint256 oldEndTime); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import "./ISeniorPool.sol"; import "./ITranchedPool.sol"; abstract contract ISeniorPoolStrategy { function getLeverageRatio(ITranchedPool pool) public view virtual returns (uint256); /** * @notice Determines how much money to invest in the senior tranche based on what is committed to the junior * tranche, what is committed to the senior tranche, and a leverage ratio to the junior tranche. Because * it takes into account what is already committed to the senior tranche, the value returned by this * function can be used "idempotently" to achieve the investment target amount without exceeding that target. * @param seniorPool The senior pool to invest from * @param pool The tranched pool to invest into (as the senior) * @return amount of money to invest into the tranched pool's senior tranche, from the senior pool */ function invest( ISeniorPool seniorPool, ITranchedPool pool ) public view virtual returns (uint256 amount); /** * @notice A companion of `invest()`: determines how much would be returned by `invest()`, as the * value to invest into the senior tranche, if the junior tranche were locked and the senior tranche * were not locked. * @param seniorPool The senior pool to invest from * @param pool The tranched pool to invest into (as the senior) * @return The amount of money to invest into the tranched pool's senior tranche, from the senior pool */ function estimateInvestment( ISeniorPool seniorPool, ITranchedPool pool ) public view virtual returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import {IERC721} from "./openzeppelin/IERC721.sol"; import {IERC721Metadata} from "./openzeppelin/IERC721Metadata.sol"; import {IERC721Enumerable} from "./openzeppelin/IERC721Enumerable.sol"; interface IStakingRewards is IERC721, IERC721Metadata, IERC721Enumerable { /// @notice Get the staking rewards position /// @param tokenId id of the position token /// @return position the position function getPosition(uint256 tokenId) external view returns (StakedPosition memory position); /// @notice Unstake an amount of `stakingToken()` (FIDU, FiduUSDCCurveLP, etc) associated with /// a given position and transfer to msg.sender. Any remaining staked amount will continue to /// accrue rewards. /// @dev This function checkpoints rewards /// @param tokenId A staking position token ID /// @param amount Amount of `stakingToken()` to be unstaked from the position function unstake(uint256 tokenId, uint256 amount) external; /// @notice Add `amount` to an existing FIDU position (`tokenId`) /// @param tokenId A staking position token ID /// @param amount Amount of `stakingToken()` to be added to tokenId's position function addToStake(uint256 tokenId, uint256 amount) external; /// @notice Returns the staked balance of a given position token. /// @dev The value returned is the bare amount, not the effective amount. The bare amount represents /// the number of tokens the user has staked for a given position. The effective amount is the bare /// amount multiplied by the token's underlying asset type multiplier. This multiplier is a crypto- /// economic parameter determined by governance. /// @param tokenId A staking position token ID /// @return Amount of staked tokens denominated in `stakingToken().decimals()` function stakedBalanceOf(uint256 tokenId) external view returns (uint256); /// @notice Deposit to FIDU and USDC into the Curve LP, and stake your Curve LP tokens in the same transaction. /// @param fiduAmount The amount of FIDU to deposit /// @param usdcAmount The amount of USDC to deposit function depositToCurveAndStakeFrom( address nftRecipient, uint256 fiduAmount, uint256 usdcAmount ) external; /// @notice "Kick" a user's reward multiplier. If they are past their lock-up period, their reward /// multiplier will be reset to 1x. /// @dev This will also checkpoint their rewards up to the current time. function kick(uint256 tokenId) external; /// @notice Accumulated rewards per token at the last checkpoint function accumulatedRewardsPerToken() external view returns (uint256); /// @notice The block timestamp when rewards were last checkpointed function lastUpdateTime() external view returns (uint256); /// @notice Claim rewards for a given staked position /// @param tokenId A staking position token ID /// @return amount of rewards claimed function getReward(uint256 tokenId) external returns (uint256); /* ========== EVENTS ========== */ event RewardAdded(uint256 reward); event Staked( address indexed user, uint256 indexed tokenId, uint256 amount, StakedPositionType positionType, uint256 baseTokenExchangeRate ); event DepositedAndStaked( address indexed user, uint256 depositedAmount, uint256 indexed tokenId, uint256 amount ); event DepositedToCurve( address indexed user, uint256 fiduAmount, uint256 usdcAmount, uint256 tokensReceived ); event DepositedToCurveAndStaked( address indexed user, uint256 fiduAmount, uint256 usdcAmount, uint256 indexed tokenId, uint256 amount ); event AddToStake( address indexed user, uint256 indexed tokenId, uint256 amount, StakedPositionType positionType ); event Unstaked( address indexed user, uint256 indexed tokenId, uint256 amount, StakedPositionType positionType ); event UnstakedMultiple(address indexed user, uint256[] tokenIds, uint256[] amounts); event RewardPaid(address indexed user, uint256 indexed tokenId, uint256 reward); event RewardsParametersUpdated( address indexed who, uint256 targetCapacity, uint256 minRate, uint256 maxRate, uint256 minRateAtPercent, uint256 maxRateAtPercent ); event EffectiveMultiplierUpdated( address indexed who, StakedPositionType positionType, uint256 multiplier ); } /// @notice Indicates which ERC20 is staked enum StakedPositionType { Fidu, CurveLP } struct Rewards { uint256 totalUnvested; uint256 totalVested; // @dev DEPRECATED (definition kept for storage slot) // For legacy vesting positions, this was used in the case of slashing. // For non-vesting positions, this is unused. uint256 totalPreviouslyVested; uint256 totalClaimed; uint256 startTime; // @dev DEPRECATED (definition kept for storage slot) // For legacy vesting positions, this is the endTime of the vesting. // For non-vesting positions, this is 0. uint256 endTime; } struct StakedPosition { // @notice Staked amount denominated in `stakingToken().decimals()` uint256 amount; // @notice Struct describing rewards owed with vesting Rewards rewards; // @notice Multiplier applied to staked amount when locking up position uint256 leverageMultiplier; // @notice Time in seconds after which position can be unstaked uint256 lockedUntil; // @notice Type of the staked position StakedPositionType positionType; // @notice Multiplier applied to staked amount to denominate in `baseStakingToken().decimals()` // @dev This field should not be used directly; it may be 0 for staked positions created prior to GIP-1. // If you need this field, use `safeEffectiveMultiplier()`, which correctly handles old staked positions. uint256 unsafeEffectiveMultiplier; // @notice Exchange rate applied to staked amount to denominate in `baseStakingToken().decimals()` // @dev This field should not be used directly; it may be 0 for staked positions created prior to GIP-1. // If you need this field, use `safeBaseTokenExchangeRate()`, which correctly handles old staked positions. uint256 unsafeBaseTokenExchangeRate; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import {IV2CreditLine} from "./IV2CreditLine.sol"; abstract contract ITranchedPool { IV2CreditLine public creditLine; uint256 public createdAt; enum Tranches { Reserved, Senior, Junior } struct TrancheInfo { uint256 id; uint256 principalDeposited; uint256 principalSharePrice; uint256 interestSharePrice; uint256 lockedUntil; } struct PoolSlice { TrancheInfo seniorTranche; TrancheInfo juniorTranche; uint256 totalInterestAccrued; uint256 principalDeployed; } function initialize( address _config, address _borrower, uint256 _juniorFeePercent, uint256 _limit, uint256 _interestApr, uint256 _paymentPeriodInDays, uint256 _termInDays, uint256 _lateFeeApr, uint256 _principalGracePeriodInDays, uint256 _fundableAt, uint256[] calldata _allowedUIDTypes ) public virtual; function getAllowedUIDTypes() external view virtual returns (uint256[] memory); function getTranche(uint256 tranche) external view virtual returns (TrancheInfo memory); function pay(uint256 amount) external virtual; function poolSlices(uint256 index) external view virtual returns (PoolSlice memory); function lockJuniorCapital() external virtual; function lockPool() external virtual; function initializeNextSlice(uint256 _fundableAt) external virtual; function totalJuniorDeposits() external view virtual returns (uint256); function drawdown(uint256 amount) external virtual; function setFundableAt(uint256 timestamp) external virtual; function deposit(uint256 tranche, uint256 amount) external virtual returns (uint256 tokenId); function assess() external virtual; function depositWithPermit( uint256 tranche, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external virtual returns (uint256 tokenId); function availableToWithdraw( uint256 tokenId ) external view virtual returns (uint256 interestRedeemable, uint256 principalRedeemable); function withdraw( uint256 tokenId, uint256 amount ) external virtual returns (uint256 interestWithdrawn, uint256 principalWithdrawn); function withdrawMax( uint256 tokenId ) external virtual returns (uint256 interestWithdrawn, uint256 principalWithdrawn); function withdrawMultiple( uint256[] calldata tokenIds, uint256[] calldata amounts ) external virtual; function numSlices() external view virtual returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.12; pragma experimental ABIEncoderV2; import {ICreditLine} from "./ICreditLine.sol"; abstract contract IV2CreditLine is ICreditLine { function principal() external view virtual returns (uint256); function totalInterestAccrued() external view virtual returns (uint256); function termStartTime() external view virtual returns (uint256); function setLimit(uint256 newAmount) external virtual; function setMaxLimit(uint256 newAmount) external virtual; function setBalance(uint256 newBalance) external virtual; function setPrincipal(uint256 _principal) external virtual; function setTotalInterestAccrued(uint256 _interestAccrued) external virtual; function drawdown(uint256 amount) external virtual; function assess() external virtual returns (uint256, uint256, uint256); function initialize( address _config, address owner, address _borrower, uint256 _limit, uint256 _interestApr, uint256 _paymentPeriodInDays, uint256 _termInDays, uint256 _lateFeeApr, uint256 _principalGracePeriodInDays ) public virtual; function setTermEndTime(uint256 newTermEndTime) external virtual; function setNextDueTime(uint256 newNextDueTime) external virtual; function setInterestOwed(uint256 newInterestOwed) external virtual; function setPrincipalOwed(uint256 newPrincipalOwed) external virtual; function setInterestAccruedAsOf(uint256 newInterestAccruedAsOf) external virtual; function setWritedownAmount(uint256 newWritedownAmount) external virtual; function setLastFullPaymentTime(uint256 newLastFullPaymentTime) external virtual; function setLateFeeApr(uint256 newLateFeeApr) external virtual; }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {IERC721Enumerable} from "./openzeppelin/IERC721Enumerable.sol"; interface IWithdrawalRequestToken is IERC721Enumerable { /// @notice Mint a withdrawal request token to `receiver` /// @dev succeeds if and only if called by senior pool function mint(address receiver) external returns (uint256 tokenId); /// @notice Burn token `tokenId` /// @dev suceeds if and only if called by senior pool function burn(uint256 tokenId) external; }
pragma solidity >=0.6.0; // This file copied from OZ, but with the version pragma updated to use >=. /** * @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); }
pragma solidity >=0.6.2; // This file copied from OZ, but with the version pragma updated to use >= & reference other >= pragma interfaces. // NOTE: Modified to reference our updated pragma version of IERC165 import "./IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of NFTs in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the NFT specified by `tokenId`. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * * * Requirements: * - `from`, `to` cannot be zero. * - `tokenId` must be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this * NFT by either {approve} or {setApprovalForAll}. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * Requirements: * - If the caller is not `from`, it must be approved to move this NFT by * either {approve} or {setApprovalForAll}. */ function transferFrom(address from, address to, uint256 tokenId) external; function approve(address to, uint256 tokenId) external; function getApproved(uint256 tokenId) external view returns (address operator); function setApprovalForAll(address operator, bool _approved) external; function isApprovedForAll(address owner, address operator) external view returns (bool); function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
pragma solidity >=0.6.2; // This file copied from OZ, but with the version pragma updated to use >=. import "./IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { function totalSupply() external view returns (uint256); function tokenOfOwnerByIndex( address owner, uint256 index ) external view returns (uint256 tokenId); function tokenByIndex(uint256 index) external view returns (uint256); }
pragma solidity >=0.6.2; // This file copied from OZ, but with the version pragma updated to use >=. 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 { function name() external view returns (string memory); function symbol() external view returns (string memory); function tokenURI(uint256 tokenId) external view returns (string memory); }
pragma solidity >=0.6.12; // This file copied from OZ, but with the version pragma updated to use >= & reference other >= pragma interfaces. /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @notice Handle the receipt of an NFT * @dev The ERC721 smart contract calls this function on the recipient * after a {IERC721-safeTransferFrom}. This function MUST return the function selector, * otherwise the caller will revert the transaction. The selector to be * returned can be obtained as `this.onERC721Received.selector`. This * function MAY throw to revert and reject the transfer. * Note: the ERC721 contract address is always the message sender. * @param operator The address which called `safeTransferFrom` function * @param from The address which previously owned the token * @param tokenId The NFT identifier which is being transferred * @param data Additional data with no specified format * @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
pragma solidity >=0.6.12; // NOTE: this file exists only to remove the extremely long error messages in safe math. import {SafeMath as OzSafeMath} from "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol"; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when 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. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return OzSafeMath.sub(a, b, ""); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { return OzSafeMath.sub(a, b, errorMessage); } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return OzSafeMath.div(a, b, ""); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { return OzSafeMath.div(a, b, errorMessage); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return OzSafeMath.mod(a, b, ""); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { return OzSafeMath.mod(a, b, errorMessage); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {AccessControlUpgradeSafe} from "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol"; import {ReentrancyGuardUpgradeSafe} from "@openzeppelin/contracts-ethereum-package/contracts/utils/ReentrancyGuard.sol"; import {Initializable} from "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol"; import {SafeMath} from "../../library/SafeMath.sol"; import {PauserPausable} from "./PauserPausable.sol"; /** * @title BaseUpgradeablePausable contract * @notice This is our Base contract that most other contracts inherit from. It includes many standard * useful abilities like upgradeability, pausability, access control, and re-entrancy guards. * @author Goldfinch */ contract BaseUpgradeablePausable is Initializable, AccessControlUpgradeSafe, PauserPausable, ReentrancyGuardUpgradeSafe { bytes32 public constant OWNER_ROLE = keccak256("OWNER_ROLE"); using SafeMath for uint256; // Pre-reserving a few slots in the base contract in case we need to add things in the future. // This does not actually take up gas cost or storage cost, but it does reserve the storage slots. // See OpenZeppelin's use of this pattern here: // https://github.com/OpenZeppelin/openzeppelin-contracts-ethereum-package/blob/master/contracts/GSN/Context.sol#L37 uint256[50] private __gap1; uint256[50] private __gap2; uint256[50] private __gap3; uint256[50] private __gap4; // solhint-disable-next-line func-name-mixedcase function __BaseUpgradeablePausable__init(address owner) public initializer { require(owner != address(0), "Owner cannot be the zero address"); __AccessControl_init_unchained(); __Pausable_init_unchained(); __ReentrancyGuard_init_unchained(); _setupRole(OWNER_ROLE, owner); _setupRole(PAUSER_ROLE, owner); _setRoleAdmin(PAUSER_ROLE, OWNER_ROLE); _setRoleAdmin(OWNER_ROLE, OWNER_ROLE); } function isAdmin() public view returns (bool) { return hasRole(OWNER_ROLE, _msgSender()); } modifier onlyAdmin() { require(isAdmin(), "Must have admin role to perform this action"); _; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {ImplementationRepository} from "./proxy/ImplementationRepository.sol"; import {ConfigOptions} from "./ConfigOptions.sol"; import {GoldfinchConfig} from "./GoldfinchConfig.sol"; import {IFidu} from "../../interfaces/IFidu.sol"; import {IWithdrawalRequestToken} from "../../interfaces/IWithdrawalRequestToken.sol"; import {ISeniorPool} from "../../interfaces/ISeniorPool.sol"; import {ISeniorPoolStrategy} from "../../interfaces/ISeniorPoolStrategy.sol"; import {IERC20withDec} from "../../interfaces/IERC20withDec.sol"; import {ICUSDCContract} from "../../interfaces/ICUSDCContract.sol"; import {IPoolTokens} from "../../interfaces/IPoolTokens.sol"; import {IBackerRewards} from "../../interfaces/IBackerRewards.sol"; import {IGoldfinchFactory} from "../../interfaces/IGoldfinchFactory.sol"; import {IGo} from "../../interfaces/IGo.sol"; import {IStakingRewards} from "../../interfaces/IStakingRewards.sol"; import {ICurveLP} from "../../interfaces/ICurveLP.sol"; /** * @title ConfigHelper * @notice A convenience library for getting easy access to other contracts and constants within the * protocol, through the use of the GoldfinchConfig contract * @author Goldfinch */ library ConfigHelper { function getSeniorPool(GoldfinchConfig config) internal view returns (ISeniorPool) { return ISeniorPool(seniorPoolAddress(config)); } function getSeniorPoolStrategy( GoldfinchConfig config ) internal view returns (ISeniorPoolStrategy) { return ISeniorPoolStrategy(seniorPoolStrategyAddress(config)); } function getUSDC(GoldfinchConfig config) internal view returns (IERC20withDec) { return IERC20withDec(usdcAddress(config)); } function getFidu(GoldfinchConfig config) internal view returns (IFidu) { return IFidu(fiduAddress(config)); } function getFiduUSDCCurveLP(GoldfinchConfig config) internal view returns (ICurveLP) { return ICurveLP(fiduUSDCCurveLPAddress(config)); } function getCUSDCContract(GoldfinchConfig config) internal view returns (ICUSDCContract) { return ICUSDCContract(cusdcContractAddress(config)); } function getPoolTokens(GoldfinchConfig config) internal view returns (IPoolTokens) { return IPoolTokens(poolTokensAddress(config)); } function getBackerRewards(GoldfinchConfig config) internal view returns (IBackerRewards) { return IBackerRewards(backerRewardsAddress(config)); } function getGoldfinchFactory(GoldfinchConfig config) internal view returns (IGoldfinchFactory) { return IGoldfinchFactory(goldfinchFactoryAddress(config)); } function getGFI(GoldfinchConfig config) internal view returns (IERC20withDec) { return IERC20withDec(gfiAddress(config)); } function getGo(GoldfinchConfig config) internal view returns (IGo) { return IGo(goAddress(config)); } function getStakingRewards(GoldfinchConfig config) internal view returns (IStakingRewards) { return IStakingRewards(stakingRewardsAddress(config)); } function getTranchedPoolImplementationRepository( GoldfinchConfig config ) internal view returns (ImplementationRepository) { return ImplementationRepository( config.getAddress(uint256(ConfigOptions.Addresses.TranchedPoolImplementationRepository)) ); } function getWithdrawalRequestToken( GoldfinchConfig config ) internal view returns (IWithdrawalRequestToken) { return IWithdrawalRequestToken( config.getAddress(uint256(ConfigOptions.Addresses.WithdrawalRequestToken)) ); } function oneInchAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.OneInch)); } function creditLineImplementationAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.CreditLineImplementation)); } /// @dev deprecated because we no longer use GSN function trustedForwarderAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.TrustedForwarder)); } function configAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.GoldfinchConfig)); } function poolTokensAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.PoolTokens)); } function backerRewardsAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.BackerRewards)); } function seniorPoolAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.SeniorPool)); } function seniorPoolStrategyAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.SeniorPoolStrategy)); } function goldfinchFactoryAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.GoldfinchFactory)); } function gfiAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.GFI)); } function fiduAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.Fidu)); } function fiduUSDCCurveLPAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.FiduUSDCCurveLP)); } function cusdcContractAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.CUSDCContract)); } function usdcAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.USDC)); } function tranchedPoolAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.TranchedPoolImplementation)); } function reserveAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.TreasuryReserve)); } function protocolAdminAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.ProtocolAdmin)); } function borrowerImplementationAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.BorrowerImplementation)); } function goAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.Go)); } function stakingRewardsAddress(GoldfinchConfig config) internal view returns (address) { return config.getAddress(uint256(ConfigOptions.Addresses.StakingRewards)); } function getReserveDenominator(GoldfinchConfig config) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.ReserveDenominator)); } function getWithdrawFeeDenominator(GoldfinchConfig config) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.WithdrawFeeDenominator)); } function getLatenessGracePeriodInDays(GoldfinchConfig config) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.LatenessGracePeriodInDays)); } function getLatenessMaxDays(GoldfinchConfig config) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.LatenessMaxDays)); } function getDrawdownPeriodInSeconds(GoldfinchConfig config) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.DrawdownPeriodInSeconds)); } function getTransferRestrictionPeriodInDays( GoldfinchConfig config ) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.TransferRestrictionPeriodInDays)); } function getLeverageRatio(GoldfinchConfig config) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.LeverageRatio)); } function getSeniorPoolWithdrawalCancelationFeeInBps( GoldfinchConfig config ) internal view returns (uint256) { return config.getNumber(uint256(ConfigOptions.Numbers.SeniorPoolWithdrawalCancelationFeeInBps)); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; /** * @title ConfigOptions * @notice A central place for enumerating the configurable options of our GoldfinchConfig contract * @author Goldfinch */ library ConfigOptions { // NEVER EVER CHANGE THE ORDER OF THESE! // You can rename or append. But NEVER change the order. enum Numbers { TransactionLimit, /// @dev: TotalFundsLimit used to represent a total cap on senior pool deposits /// but is now deprecated TotalFundsLimit, MaxUnderwriterLimit, ReserveDenominator, WithdrawFeeDenominator, LatenessGracePeriodInDays, LatenessMaxDays, DrawdownPeriodInSeconds, TransferRestrictionPeriodInDays, LeverageRatio, /// A number in the range [0, 10000] representing basis points of FIDU taken as a fee /// when a withdrawal request is canceled. SeniorPoolWithdrawalCancelationFeeInBps } /// @dev TrustedForwarder is deprecated because we no longer use GSN. CreditDesk /// and Pool are deprecated because they are no longer used in the protocol. enum Addresses { Pool, // deprecated CreditLineImplementation, GoldfinchFactory, CreditDesk, // deprecated Fidu, USDC, TreasuryReserve, ProtocolAdmin, OneInch, TrustedForwarder, // deprecated CUSDCContract, GoldfinchConfig, PoolTokens, TranchedPoolImplementation, // deprecated SeniorPool, SeniorPoolStrategy, MigratedTranchedPoolImplementation, BorrowerImplementation, GFI, Go, BackerRewards, StakingRewards, FiduUSDCCurveLP, TranchedPoolImplementationRepository, WithdrawalRequestToken } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {SafeMath} from "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol"; /// @notice Library to house logic around the ERC2981 royalty standard. Contracts /// using this library should define a ConfigurableRoyaltyStandard.RoyaltyParams /// state var and public functions that proxy to the logic here. Contracts should /// take care to ensure that a public `setRoyaltyParams` method is only callable /// by an admin. library ConfigurableRoyaltyStandard { using SafeMath for uint256; /// @dev bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a bytes4 internal constant _INTERFACE_ID_ERC2981 = 0x2a55205a; uint256 internal constant _PERCENTAGE_DECIMALS = 1e18; struct RoyaltyParams { // The address that should receive royalties address receiver; // The percent of `salePrice` that should be taken for royalties. // Represented with `_PERCENTAGE_DECIMALS` where `_PERCENTAGE_DECIMALS` is 100%. uint256 royaltyPercent; } event RoyaltyParamsSet(address indexed sender, address newReceiver, uint256 newRoyaltyPercent); /// @notice Called with the sale price to determine how much royalty // is owed and to whom. /// @param _tokenId The NFT asset queried for royalty information /// @param _salePrice The sale price of the NFT asset specified by _tokenId /// @return receiver Address that should receive royalties /// @return royaltyAmount The royalty payment amount for _salePrice function royaltyInfo( RoyaltyParams storage params, // solhint-disable-next-line no-unused-vars uint256 _tokenId, uint256 _salePrice ) internal view returns (address, uint256) { uint256 royaltyAmount = _salePrice.mul(params.royaltyPercent).div(_PERCENTAGE_DECIMALS); return (params.receiver, royaltyAmount); } /// @notice Set royalty params used in `royaltyInfo`. The calling contract should limit /// public use of this function to owner or using some other access control scheme. /// @param newReceiver The new address which should receive royalties. See `receiver`. /// @param newRoyaltyPercent The new percent of `salePrice` that should be taken for royalties. /// See `royaltyPercent`. /// @dev The receiver cannot be the null address function setRoyaltyParams( RoyaltyParams storage params, address newReceiver, uint256 newRoyaltyPercent ) internal { require(newReceiver != address(0), "Null receiver"); params.receiver = newReceiver; params.royaltyPercent = newRoyaltyPercent; emit RoyaltyParamsSet(msg.sender, newReceiver, newRoyaltyPercent); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {BaseUpgradeablePausable} from "./BaseUpgradeablePausable.sol"; import {IGoldfinchConfig} from "../../interfaces/IGoldfinchConfig.sol"; import {ConfigOptions} from "./ConfigOptions.sol"; /** * @title GoldfinchConfig * @notice This contract stores mappings of useful "protocol config state", giving a central place * for all other contracts to access it. For example, the TransactionLimit, or the PoolAddress. These config vars * are enumerated in the `ConfigOptions` library, and can only be changed by admins of the protocol. * Note: While this inherits from BaseUpgradeablePausable, it is not deployed as an upgradeable contract (this * is mostly to save gas costs of having each call go through a proxy) * @author Goldfinch */ contract GoldfinchConfig is BaseUpgradeablePausable { bytes32 public constant GO_LISTER_ROLE = keccak256("GO_LISTER_ROLE"); mapping(uint256 => address) public addresses; mapping(uint256 => uint256) public numbers; mapping(address => bool) public goList; event AddressUpdated(address owner, uint256 index, address oldValue, address newValue); event NumberUpdated(address owner, uint256 index, uint256 oldValue, uint256 newValue); event GoListed(address indexed member); event NoListed(address indexed member); bool public valuesInitialized; function initialize(address owner) public initializer { require(owner != address(0), "Owner address cannot be empty"); __BaseUpgradeablePausable__init(owner); _setupRole(GO_LISTER_ROLE, owner); _setRoleAdmin(GO_LISTER_ROLE, OWNER_ROLE); } function setAddress(uint256 addressIndex, address newAddress) public onlyAdmin { require(addresses[addressIndex] == address(0), "Address has already been initialized"); emit AddressUpdated(msg.sender, addressIndex, addresses[addressIndex], newAddress); addresses[addressIndex] = newAddress; } function setNumber(uint256 index, uint256 newNumber) public onlyAdmin { emit NumberUpdated(msg.sender, index, numbers[index], newNumber); numbers[index] = newNumber; } function setTreasuryReserve(address newTreasuryReserve) public onlyAdmin { uint256 key = uint256(ConfigOptions.Addresses.TreasuryReserve); emit AddressUpdated(msg.sender, key, addresses[key], newTreasuryReserve); addresses[key] = newTreasuryReserve; } function setSeniorPoolStrategy(address newStrategy) public onlyAdmin { uint256 key = uint256(ConfigOptions.Addresses.SeniorPoolStrategy); emit AddressUpdated(msg.sender, key, addresses[key], newStrategy); addresses[key] = newStrategy; } function setCreditLineImplementation(address newAddress) public onlyAdmin { uint256 key = uint256(ConfigOptions.Addresses.CreditLineImplementation); emit AddressUpdated(msg.sender, key, addresses[key], newAddress); addresses[key] = newAddress; } function setTranchedPoolImplementation(address newAddress) public onlyAdmin { uint256 key = uint256(ConfigOptions.Addresses.TranchedPoolImplementation); emit AddressUpdated(msg.sender, key, addresses[key], newAddress); addresses[key] = newAddress; } function setBorrowerImplementation(address newAddress) public onlyAdmin { uint256 key = uint256(ConfigOptions.Addresses.BorrowerImplementation); emit AddressUpdated(msg.sender, key, addresses[key], newAddress); addresses[key] = newAddress; } function setGoldfinchConfig(address newAddress) public onlyAdmin { uint256 key = uint256(ConfigOptions.Addresses.GoldfinchConfig); emit AddressUpdated(msg.sender, key, addresses[key], newAddress); addresses[key] = newAddress; } function initializeFromOtherConfig( address _initialConfig, uint256 numbersLength, uint256 addressesLength ) public onlyAdmin { require(!valuesInitialized, "Already initialized values"); IGoldfinchConfig initialConfig = IGoldfinchConfig(_initialConfig); for (uint256 i = 0; i < numbersLength; i++) { setNumber(i, initialConfig.getNumber(i)); } for (uint256 i = 0; i < addressesLength; i++) { if (getAddress(i) == address(0)) { setAddress(i, initialConfig.getAddress(i)); } } valuesInitialized = true; } /** * @dev Adds a user to go-list * @param _member address to add to go-list */ function addToGoList(address _member) public onlyGoListerRole { goList[_member] = true; emit GoListed(_member); } /** * @dev removes a user from go-list * @param _member address to remove from go-list */ function removeFromGoList(address _member) public onlyGoListerRole { goList[_member] = false; emit NoListed(_member); } /** * @dev adds many users to go-list at once * @param _members addresses to ad to go-list */ function bulkAddToGoList(address[] calldata _members) external onlyGoListerRole { for (uint256 i = 0; i < _members.length; i++) { addToGoList(_members[i]); } } /** * @dev removes many users from go-list at once * @param _members addresses to remove from go-list */ function bulkRemoveFromGoList(address[] calldata _members) external onlyGoListerRole { for (uint256 i = 0; i < _members.length; i++) { removeFromGoList(_members[i]); } } /* Using custom getters in case we want to change underlying implementation later, or add checks or validations later on. */ function getAddress(uint256 index) public view returns (address) { return addresses[index]; } function getNumber(uint256 index) public view returns (uint256) { return numbers[index]; } modifier onlyGoListerRole() { require( hasRole(GO_LISTER_ROLE, _msgSender()), "Must have go-lister role to perform this action" ); _; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol"; /// @notice Base contract that provides an OWNER_ROLE and convenience function/modifier for /// checking sender against this role. Inherting contracts must set up this role using /// `_setupRole` and `_setRoleAdmin`. contract HasAdmin is AccessControlUpgradeSafe { /// @notice ID for OWNER_ROLE bytes32 public constant OWNER_ROLE = keccak256("OWNER_ROLE"); /// @notice Determine whether msg.sender has OWNER_ROLE /// @return isAdmin True when msg.sender has OWNER_ROLE function isAdmin() public view returns (bool) { return hasRole(OWNER_ROLE, msg.sender); } modifier onlyAdmin() { /// @dev AD: Must have admin role to perform this action require(isAdmin(), "AD"); _; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import "@openzeppelin/contracts-ethereum-package/contracts/utils/Pausable.sol"; import "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol"; /** * @title PauserPausable * @notice Inheriting from OpenZeppelin's Pausable contract, this does small * augmentations to make it work with a PAUSER_ROLE, leveraging the AccessControl contract. * It is meant to be inherited. * @author Goldfinch */ contract PauserPausable is AccessControlUpgradeSafe, PausableUpgradeSafe { bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE"); // solhint-disable-next-line func-name-mixedcase function __PauserPausable__init() public initializer { __Pausable_init_unchained(); } /** * @dev Pauses all functions guarded by Pause * * See {Pausable-_pause}. * * Requirements: * * - the caller must have the PAUSER_ROLE. */ function pause() public onlyPauserRole { _pause(); } /** * @dev Unpauses the contract * * See {Pausable-_unpause}. * * Requirements: * * - the caller must have the Pauser role */ function unpause() public onlyPauserRole { _unpause(); } modifier onlyPauserRole() { /// @dev NA: not authorized require(hasRole(PAUSER_ROLE, _msgSender()), "NA"); _; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ABIEncoderV2; import {BaseUpgradeablePausable} from "../BaseUpgradeablePausable.sol"; import {Address} from "@openzeppelin/contracts/utils/Address.sol"; /// @title User Controlled Upgrades (UCU) Proxy Repository /// A repository maintaing a collection of "lineages" of implementation contracts /// /// Lineages are a sequence of implementations each lineage can be thought of as /// a "major" revision of implementations. Implementations between lineages are /// considered incompatible. contract ImplementationRepository is BaseUpgradeablePausable { address internal constant INVALID_IMPL = address(0); uint256 internal constant INVALID_LINEAGE_ID = 0; /// @notice returns data that will be delegatedCalled when the given implementation /// is upgraded to mapping(address => bytes) public upgradeDataFor; /// @dev mapping from one implementation to the succeeding implementation mapping(address => address) internal _nextImplementationOf; /// @notice Returns the id of the lineage a given implementation belongs to mapping(address => uint256) public lineageIdOf; /// @dev internal because we expose this through the `currentImplementation(uint256)` api mapping(uint256 => address) internal _currentOfLineage; /// @notice Returns the id of the most recently created lineage uint256 public currentLineageId; // //////// External //////////////////////////////////////////////////////////// /// @notice initialize the repository's state /// @dev reverts if `_owner` is the null address /// @dev reverts if `implementation` is not a contract /// @param _owner owner of the repository /// @param implementation initial implementation in the repository function initialize(address _owner, address implementation) external initializer { __BaseUpgradeablePausable__init(_owner); _createLineage(implementation); require(currentLineageId != INVALID_LINEAGE_ID); } /// @notice set data that will be delegate called when a proxy upgrades to the given `implementation` /// @dev reverts when caller is not an admin /// @dev reverts when the contract is paused /// @dev reverts if the given implementation isn't registered function setUpgradeDataFor( address implementation, bytes calldata data ) external onlyAdmin whenNotPaused { _setUpgradeDataFor(implementation, data); } /// @notice Create a new lineage of implementations. /// /// This creates a new "root" of a new lineage /// @dev reverts if `implementation` is not a contract /// @param implementation implementation that will be the first implementation in the lineage /// @return newly created lineage's id function createLineage( address implementation ) external onlyAdmin whenNotPaused returns (uint256) { return _createLineage(implementation); } /// @notice add a new implementation and set it as the current implementation /// @dev reverts if the sender is not an owner /// @dev reverts if the contract is paused /// @dev reverts if `implementation` is not a contract /// @param implementation implementation to append function append(address implementation) external onlyAdmin whenNotPaused { _append(implementation, currentLineageId); } /// @notice Append an implementation to a specified lineage /// @dev reverts if the contract is paused /// @dev reverts if the sender is not an owner /// @dev reverts if `implementation` is not a contract /// @param implementation implementation to append /// @param lineageId id of lineage to append to function append(address implementation, uint256 lineageId) external onlyAdmin whenNotPaused { _append(implementation, lineageId); } /// @notice Remove an implementation from the chain and "stitch" together its neighbors /// @dev If you have a chain of `A -> B -> C` and I call `remove(B, C)` it will result in `A -> C` /// @dev reverts if `previos` is not the ancestor of `toRemove` /// @dev we need to provide the previous implementation here to be able to successfully "stitch" /// the chain back together. Because this is an admin action, we can source what the previous /// version is from events. /// @param toRemove Implementation to remove /// @param previous Implementation that currently has `toRemove` as its successor function remove(address toRemove, address previous) external onlyAdmin whenNotPaused { _remove(toRemove, previous); } // //////// External view //////////////////////////////////////////////////////////// /// @notice Returns `true` if an implementation has a next implementation set /// @param implementation implementation to check /// @return The implementation following the given implementation function hasNext(address implementation) external view returns (bool) { return _nextImplementationOf[implementation] != INVALID_IMPL; } /// @notice Returns `true` if an implementation has already been added /// @param implementation Implementation to check existence of /// @return `true` if the implementation has already been added function has(address implementation) external view returns (bool) { return _has(implementation); } /// @notice Get the next implementation for a given implementation or /// `address(0)` if it doesn't exist /// @dev reverts when contract is paused /// @param implementation implementation to get the upgraded implementation for /// @return Next Implementation function nextImplementationOf( address implementation ) external view whenNotPaused returns (address) { return _nextImplementationOf[implementation]; } /// @notice Returns `true` if a given lineageId exists function lineageExists(uint256 lineageId) external view returns (bool) { return _lineageExists(lineageId); } /// @notice Return the current implementation of a lineage with the given `lineageId` function currentImplementation(uint256 lineageId) external view whenNotPaused returns (address) { return _currentImplementation(lineageId); } /// @notice return current implementaton of the current lineage function currentImplementation() external view whenNotPaused returns (address) { return _currentImplementation(currentLineageId); } // //////// Internal //////////////////////////////////////////////////////////// function _setUpgradeDataFor(address implementation, bytes memory data) internal { require(_has(implementation), "unknown impl"); upgradeDataFor[implementation] = data; emit UpgradeDataSet(implementation, data); } function _createLineage(address implementation) internal virtual returns (uint256) { require(Address.isContract(implementation), "not a contract"); // NOTE: impractical to overflow currentLineageId += 1; _currentOfLineage[currentLineageId] = implementation; lineageIdOf[implementation] = currentLineageId; emit Added(currentLineageId, implementation, address(0)); return currentLineageId; } function _currentImplementation(uint256 lineageId) internal view returns (address) { return _currentOfLineage[lineageId]; } /// @notice Returns `true` if an implementation has already been added /// @param implementation implementation to check for /// @return `true` if the implementation has already been added function _has(address implementation) internal view virtual returns (bool) { return lineageIdOf[implementation] != INVALID_LINEAGE_ID; } /// @notice Set an implementation to the current implementation /// @param implementation implementation to set as current implementation /// @param lineageId id of lineage to append to function _append(address implementation, uint256 lineageId) internal virtual { require(Address.isContract(implementation), "not a contract"); require(!_has(implementation), "exists"); require(_lineageExists(lineageId), "invalid lineageId"); require(_currentOfLineage[lineageId] != INVALID_IMPL, "empty lineage"); address oldImplementation = _currentOfLineage[lineageId]; _currentOfLineage[lineageId] = implementation; lineageIdOf[implementation] = lineageId; _nextImplementationOf[oldImplementation] = implementation; emit Added(lineageId, implementation, oldImplementation); } function _remove(address toRemove, address previous) internal virtual { require(toRemove != INVALID_IMPL && previous != INVALID_IMPL, "ZERO"); require(_nextImplementationOf[previous] == toRemove, "Not prev"); uint256 lineageId = lineageIdOf[toRemove]; // need to reset the head pointer to the previous version if we remove the head if (toRemove == _currentOfLineage[lineageId]) { _currentOfLineage[lineageId] = previous; } _setUpgradeDataFor(toRemove, ""); // reset upgrade data _nextImplementationOf[previous] = _nextImplementationOf[toRemove]; _nextImplementationOf[toRemove] = INVALID_IMPL; lineageIdOf[toRemove] = INVALID_LINEAGE_ID; emit Removed(lineageId, toRemove); } function _lineageExists(uint256 lineageId) internal view returns (bool) { return lineageId != INVALID_LINEAGE_ID && lineageId <= currentLineageId; } // //////// Events ////////////////////////////////////////////////////////////// event Added( uint256 indexed lineageId, address indexed newImplementation, address indexed oldImplementation ); event Removed(uint256 indexed lineageId, address indexed implementation); event UpgradeDataSet(address indexed implementation, bytes data); }
{ "evmVersion": "istanbul", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 100 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"pool","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"TokenBurned","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"pool","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tranche","type":"uint256"}],"name":"TokenMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"pool","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"principalWithdrawn","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tranche","type":"uint256"}],"name":"TokenPrincipalWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"pool","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"principalRedeemed","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"interestRedeemed","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tranche","type":"uint256"}],"name":"TokenRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"pool","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newTokenId1","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newPrincipal1","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newTokenId2","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newPrincipal2","type":"uint256"}],"name":"TokenSplit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MINTER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OWNER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PAUSER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"contract GoldfinchConfig","name":"_config","type":"address"}],"name":"__initialize__","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"_tokenIdTracker","outputs":[{"internalType":"uint256","name":"_value","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"config","outputs":[{"internalType":"contract GoldfinchConfig","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pool","type":"address"}],"name":"getPoolInfo","outputs":[{"components":[{"internalType":"uint256","name":"totalMinted","type":"uint256"},{"internalType":"uint256","name":"totalPrincipalRedeemed","type":"uint256"},{"internalType":"bool","name":"created","type":"bool"}],"internalType":"struct IPoolTokens.PoolInfo","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getTokenInfo","outputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"uint256","name":"tranche","type":"uint256"},{"internalType":"uint256","name":"principalAmount","type":"uint256"},{"internalType":"uint256","name":"principalRedeemed","type":"uint256"},{"internalType":"uint256","name":"interestRedeemed","type":"uint256"}],"internalType":"struct IPoolTokens.TokenInfo","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isAdmin","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"isApprovedOrOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"principalAmount","type":"uint256"},{"internalType":"uint256","name":"tranche","type":"uint256"}],"internalType":"struct IPoolTokens.MintParams","name":"params","type":"tuple"},{"internalType":"address","name":"to","type":"address"}],"name":"mint","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newPool","type":"address"}],"name":"onPoolCreated","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"pools","outputs":[{"internalType":"uint256","name":"totalMinted","type":"uint256"},{"internalType":"uint256","name":"totalPrincipalRedeemed","type":"uint256"},{"internalType":"bool","name":"created","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"principalRedeemed","type":"uint256"},{"internalType":"uint256","name":"interestRedeemed","type":"uint256"}],"name":"redeem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"reducePrincipalAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"uint256","name":"_salePrice","type":"uint256"}],"name":"royaltyInfo","outputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"royaltyParams","outputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"royaltyPercent","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI_","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newReceiver","type":"address"},{"internalType":"uint256","name":"newRoyaltyPercent","type":"uint256"}],"name":"setRoyaltyParams","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"newPrincipal1","type":"uint256"}],"name":"splitToken","outputs":[{"internalType":"uint256","name":"tokenId1","type":"uint256"},{"internalType":"uint256","name":"tokenId2","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"id","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"tokens","outputs":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"uint256","name":"tranche","type":"uint256"},{"internalType":"uint256","name":"principalAmount","type":"uint256"},{"internalType":"uint256","name":"principalRedeemed","type":"uint256"},{"internalType":"uint256","name":"interestRedeemed","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"}],"name":"validPool","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"principalAmount","type":"uint256"}],"name":"withdrawPrincipal","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.