| { | |
| "language": "Solidity", | |
| "sources": { | |
| "contracts/interfaces/IInterestRateCredit.sol": { | |
| "content": "pragma solidity 0.8.16;\n\ninterface IInterestRateCredit {\n struct Rate {\n // The interest rate charged to a Borrower on borrowed / drawn down funds\n // in bps, 4 decimals\n uint128 dRate;\n // The interest rate charged to a Borrower on the remaining funds available, but not yet drawn down (rate charged on the available headroom)\n // in bps, 4 decimals\n uint128 fRate;\n // The time stamp at which accrued interest was last calculated on an ID and then added to the overall interestAccrued (interest due but not yet repaid)\n uint256 lastAccrued;\n }\n\n /**\n * @notice - allows `lineContract to calculate how much interest is owed since it was last calculated charged at time `lastAccrued`\n * @dev - pure function that only calculates interest owed. Line is responsible for actually updating credit balances with returned value\n * @dev - callable by `lineContract`\n * @param id - position id on Line to look up interest rates for\n * @param drawnBalance the balance of funds that a Borrower has drawn down on the credit line\n * @param facilityBalance the remaining balance of funds that a Borrower can still drawn down on a credit line (aka headroom)\n *\n * @return - the amount of interest to be repaid for this interest period\n */\n\n function accrueInterest(bytes32 id, uint256 drawnBalance, uint256 facilityBalance) external returns (uint256);\n\n /**\n * @notice - updates interest rates on a lender's position. Updates lastAccrued time to block.timestamp\n * @dev - MUST call accrueInterest() on Line before changing rates. If not, lender will not accrue interest over previous interest period.\n * @dev - callable by `line`\n * @return - if call was successful or not\n */\n function setRate(bytes32 id, uint128 dRate, uint128 fRate) external returns (bool);\n\n function getInterestAccrued(\n bytes32 id,\n uint256 drawnBalance,\n uint256 facilityBalance\n ) external view returns (uint256);\n\n function getRates(bytes32 id) external view returns (uint128, uint128);\n}\n" | |
| }, | |
| "contracts/interfaces/ILineOfCredit.sol": { | |
| "content": "pragma solidity 0.8.16;\n\nimport {LineLib} from \"../utils/LineLib.sol\";\nimport {IOracle} from \"../interfaces/IOracle.sol\";\n\ninterface ILineOfCredit {\n // Lender data\n struct Credit {\n // all denominated in token, not USD\n uint256 deposit; // The total liquidity provided by a Lender in a given token on a Line of Credit\n uint256 principal; // The amount of a Lender's Deposit on a Line of Credit that has actually been drawn down by the Borrower (in Tokens)\n uint256 interestAccrued; // Interest due by a Borrower but not yet repaid to the Line of Credit contract\n uint256 interestRepaid; // Interest repaid by a Borrower to the Line of Credit contract but not yet withdrawn by a Lender\n uint8 decimals; // Decimals of Credit Token for calcs\n address token; // The token being lent out (Credit Token)\n address lender; // The person to repay\n bool isOpen; // Status of position\n }\n\n // General Events\n event UpdateStatus(uint256 indexed status); // store as normal uint so it can be indexed in subgraph\n\n event DeployLine(address indexed oracle, address indexed arbiter, address indexed borrower);\n\n event SortedIntoQ(bytes32 indexed id, uint256 indexed newIdx, uint256 indexed oldIdx, bytes32 oldId);\n\n // MutualConsent borrower/lender events\n\n event AddCredit(address indexed lender, address indexed token, uint256 indexed deposit, bytes32 id);\n // can only reference id once AddCredit is emitted because it will be indexed offchain\n\n event SetRates(bytes32 indexed id, uint128 indexed dRate, uint128 indexed fRate);\n\n event IncreaseCredit(bytes32 indexed id, uint256 indexed deposit);\n\n // Lender Events\n\n // Emits data re Lender removes funds (principal) - there is no corresponding function, just withdraw()\n event WithdrawDeposit(bytes32 indexed id, uint256 indexed amount);\n\n // Emits data re Lender withdraws interest - there is no corresponding function, just withdraw()\n event WithdrawProfit(bytes32 indexed id, uint256 indexed amount);\n\n // Emitted when any credit line is closed by the line's borrower or the position's lender\n event CloseCreditPosition(bytes32 indexed id);\n\n // After accrueInterest runs, emits the amount of interest added to a Borrower's outstanding balance of interest due\n // but not yet repaid to the Line of Credit contract\n event InterestAccrued(bytes32 indexed id, uint256 indexed amount);\n\n // Borrower Events\n\n // receive full line or drawdown on credit\n event Borrow(bytes32 indexed id, uint256 indexed amount);\n\n // Emits that a Borrower has repaid an amount of interest Results in an increase in interestRepaid, i.e. interest not yet withdrawn by a Lender). There is no corresponding function\n event RepayInterest(bytes32 indexed id, uint256 indexed amount);\n\n // Emits that a Borrower has repaid an amount of principal - there is no corresponding function\n event RepayPrincipal(bytes32 indexed id, uint256 indexed amount);\n\n event Default(bytes32 indexed id);\n\n // Access Errors\n error NotActive();\n error NotBorrowing();\n error CallerAccessDenied();\n\n // Tokens\n error TokenTransferFailed();\n error NoTokenPrice();\n\n // Line\n error BadModule(address module);\n error NoLiquidity();\n error PositionExists();\n error CloseFailedWithPrincipal();\n error NotInsolvent(address module);\n error NotLiquidatable();\n error AlreadyInitialized();\n error PositionIsClosed();\n error RepayAmountExceedsDebt(uint256 totalAvailable);\n error CantStepQ();\n error EthSupportDisabled();\n error BorrowFailed();\n\n // Fully public functions\n\n /**\n * @notice - Runs logic to ensure Line owns all modules are configured properly - collateral, interest rates, arbiter, etc.\n * - Changes `status` from UNINITIALIZED to ACTIVE\n * @dev - Reverts on failure to update status\n */\n function init() external;\n\n // MutualConsent functions\n\n /**\n * @notice - On first call, creates proposed terms and emits MutualConsentRegistsered event. No position is created.\n - On second call, creates position and stores in Line contract, sets interest rates, and starts accruing facility rate fees.\n * @dev - Requires mutualConsent participants send EXACT same params when calling addCredit\n * @dev - Fully executes function after a Borrower and a Lender have agreed terms, both Lender and borrower have agreed through mutualConsent\n * @dev - callable by `lender` and `borrower`\n * @param drate - The interest rate charged to a Borrower on borrowed / drawn down funds. In bps, 4 decimals.\n * @param frate - The interest rate charged to a Borrower on the remaining funds available, but not yet drawn down \n (rate charged on the available headroom). In bps, 4 decimals.\n * @param amount - The amount of Credit Token to initially deposit by the Lender\n * @param token - The Credit Token, i.e. the token to be lent out\n * @param lender - The address that will manage credit line\n * @return id - Lender's position id to look up in `credits`\n */\n function addCredit(\n uint128 drate,\n uint128 frate,\n uint256 amount,\n address token,\n address lender\n ) external payable returns (bytes32);\n\n /**\n * @notice - lets Lender and Borrower update rates on the lender's position\n * - accrues interest before updating terms, per InterestRate docs\n * - can do so even when LIQUIDATABLE for the purpose of refinancing and/or renego\n * @dev - callable by Borrower or Lender\n * @param id - position id that we are updating\n * @param drate - new drawn rate. In bps, 4 decimals\n * @param frate - new facility rate. In bps, 4 decimals\n */\n function setRates(bytes32 id, uint128 drate, uint128 frate) external;\n\n /**\n * @notice - Lets a Lender and a Borrower increase the credit limit on a position\n * @dev - line status must be ACTIVE\n * @dev - callable by borrower\n * @dev - The function retains the `payable` designation, despite not accepting Eth via mutualConsent modifier, as a gas-optimization\n * @param id - position id that we are updating\n * @param amount - amount to deposit by the Lender\n */\n function increaseCredit(bytes32 id, uint256 amount) external payable;\n\n // Borrower functions\n\n /**\n * @notice - Borrower chooses which lender position draw down on and transfers tokens from Line contract to Borrower\n * @dev - callable by borrower\n * @param id - the position to draw down on\n * @param amount - amount of tokens the borrower wants to withdraw\n */\n function borrow(bytes32 id, uint256 amount) external;\n\n /**\n * @notice - Transfers token used in position id from msg.sender to Line contract.\n * @dev - Available for anyone to deposit Credit Tokens to be available to be withdrawn by Lenders\n * @dev - The function retains the `payable` designation, despite reverting with a non-zero msg.value, as a gas-optimization\n * @notice - see LineOfCredit._repay() for more details\n * @param amount - amount of `token` in `id` to pay back\n */\n function depositAndRepay(uint256 amount) external payable;\n\n /**\n * @notice - A Borrower deposits enough tokens to repay and close a credit line.\n * @dev - callable by borrower\n * @dev - The function retains the `payable` designation, despite reverting with a non-zero msg.value, as a gas-optimization\n */\n function depositAndClose() external payable;\n\n /**\n * @notice - Removes and deletes a position, preventing any more borrowing or interest.\n * - Requires that the position principal has already been repais in full\n * @dev - MUST repay accrued interest from facility fee during call\n * @dev - callable by `borrower` or Lender\n * @dev - The function retains the `payable` designation, despite reverting with a non-zero msg.value, as a gas-optimization\n * @param id -the position id to be closed\n */\n function close(bytes32 id) external payable;\n\n // Lender functions\n\n /**\n * @notice - Withdraws liquidity from a Lender's position available to the Borrower.\n * - Lender is only allowed to withdraw tokens not already lent out\n * - Withdraws from repaid interest (profit) first and then deposit is reduced\n * @dev - can only withdraw tokens from their own position. If multiple lenders lend DAI, the lender1 can't withdraw using lender2's tokens\n * @dev - callable by Lender on `id`\n * @param id - the position id that Lender is withdrawing from\n * @param amount - amount of tokens the Lender would like to withdraw (withdrawn amount may be lower)\n */\n function withdraw(bytes32 id, uint256 amount) external;\n\n // Arbiter functions\n /**\n * @notice - Allow the Arbiter to signify that the Borrower is incapable of repaying debt permanently.\n * - Recoverable funds for Lender after declaring insolvency = deposit + interestRepaid - principal\n * @dev - Needed for onchain impairment accounting e.g. updating ERC4626 share price\n * - MUST NOT have collateral left for call to succeed. Any collateral must already have been liquidated.\n * @dev - Callable only by Arbiter.\n */\n function declareInsolvent() external;\n\n /**\n *\n * @notice - Updates accrued interest for the whole Line of Credit facility (i.e. for all credit lines)\n * @dev - Loops over all position ids and calls related internal functions during which InterestRateCredit.sol\n * is called with the id data and then 'interestAccrued' is updated.\n * @dev - The related internal function _accrue() is called by other functions any time the balance on an individual\n * credit line changes or if the interest rates of a credit line are changed by mutual consent\n * between a Borrower and a Lender.\n */\n function accrueInterest() external;\n\n function healthcheck() external returns (LineLib.STATUS);\n\n /**\n * @notice - Cycles through position ids andselects first position with non-null principal to the zero index\n * @dev - Only works if the first element in the queue is null\n */\n function stepQ() external;\n\n /**\n * @notice - Returns the total debt of a Borrower across all positions for all Lenders.\n * @dev - Denominated in USD, 8 decimals.\n * @dev - callable by anyone\n * @return totalPrincipal - total amount of principal, in USD, owed across all positions\n * @return totalInterest - total amount of interest, in USD, owed across all positions\n */\n function updateOutstandingDebt() external returns (uint256, uint256);\n\n // State getters\n\n function status() external returns (LineLib.STATUS);\n\n function borrower() external returns (address);\n\n function arbiter() external returns (address);\n\n function oracle() external returns (IOracle);\n\n /**\n * @notice - getter for amount of active ids + total ids in list\n * @return - (uint256, uint256) - active credit lines, total length\n */\n function counts() external view returns (uint256, uint256);\n\n /**\n * @notice - getter for amount of active ids + total ids in list\n * @return - (uint256, uint256) - active credit lines, total length\n */\n\n function interestAccrued(bytes32 id) external returns (uint256);\n\n /**\n * @notice - info on the next lender position that must be repaid\n * @return - (bytes32, address, address, uint, uint) - id, lender, token, principal, interestAccrued\n */\n function nextInQ() external view returns (bytes32, address, address, uint256, uint256, uint256, uint128, uint128);\n\n /**\n * @notice - how many tokens can be withdrawn from positions by borrower or lender\n * @return - (uint256, uint256) - remaining deposit, claimable interest\n */\n function available(bytes32 id) external returns (uint256, uint256);\n}\n" | |
| }, | |
| "contracts/interfaces/IOracle.sol": { | |
| "content": "pragma solidity 0.8.16;\n\ninterface IOracle {\n /** current price for token asset. denominated in USD */\n function getLatestAnswer(address token) external returns (int);\n\n /** Readonly function providing the current price for token asset. denominated in USD */\n function _getLatestAnswer(address token) external view returns (int);\n}\n" | |
| }, | |
| "contracts/utils/CreditLib.sol": { | |
| "content": "pragma solidity 0.8.16;\nimport {Denominations} from \"chainlink/Denominations.sol\";\nimport {ILineOfCredit} from \"../interfaces/ILineOfCredit.sol\";\nimport {IOracle} from \"../interfaces/IOracle.sol\";\nimport {IInterestRateCredit} from \"../interfaces/IInterestRateCredit.sol\";\nimport {ILineOfCredit} from \"../interfaces/ILineOfCredit.sol\";\nimport {LineLib} from \"./LineLib.sol\";\n\n/**\n * @title Debt DAO Line of Credit Library\n * @author Kiba Gateaux\n * @notice Core logic and variables to be reused across all Debt DAO Marketplace Line of Credit contracts\n */\n\nlibrary CreditLib {\n event AddCredit(address indexed lender, address indexed token, uint256 indexed deposit, bytes32 id);\n\n /// @notice Emitted when Lender withdraws from their initial deposit\n event WithdrawDeposit(bytes32 indexed id, uint256 indexed amount);\n\n /// @notice Emitted when Lender withdraws interest paid by borrower\n event WithdrawProfit(bytes32 indexed id, uint256 indexed amount);\n\n /// @notice Emits amount of interest (denominated in credit token) added to a Borrower's outstanding balance\n event InterestAccrued(bytes32 indexed id, uint256 indexed amount);\n\n // Borrower Events\n\n /// @notice Emits when Borrower has drawn down an amount (denominated in credit.token) on a credit line\n event Borrow(bytes32 indexed id, uint256 indexed amount);\n\n /// @notice Emits that a Borrower has repaid some amount of interest (denominated in credit.token)\n event RepayInterest(bytes32 indexed id, uint256 indexed amount);\n\n /// @notice Emits that a Borrower has repaid some amount of principal (denominated in credit.token)\n event RepayPrincipal(bytes32 indexed id, uint256 indexed amount);\n\n // Errors\n\n error NoTokenPrice();\n\n error PositionExists();\n\n error RepayAmountExceedsDebt(uint256 totalAvailable);\n\n error InvalidTokenDecimals();\n\n error NoQueue();\n\n error PositionIsClosed();\n\n error NoLiquidity();\n\n error CloseFailedWithPrincipal();\n\n error CallerAccessDenied();\n\n /**\n * @dev - Creates a deterministic hash id for a credit line provided by a single Lender for a given token on a Line of Credit facility\n * @param line - The Line of Credit facility concerned\n * @param lender - The address managing the credit line concerned\n * @param token - The token being lent out on the credit line concerned\n * @return id\n */\n function computeId(address line, address lender, address token) external pure returns (bytes32) {\n return keccak256(abi.encode(line, lender, token));\n }\n\n // getOutstandingDebt() is called by updateOutstandingDebt()\n function getOutstandingDebt(\n ILineOfCredit.Credit memory credit,\n bytes32 id,\n address oracle,\n address interestRate\n ) external returns (ILineOfCredit.Credit memory c, uint256 principal, uint256 interest) {\n c = accrue(credit, id, interestRate);\n\n int256 price = IOracle(oracle).getLatestAnswer(c.token);\n\n principal = calculateValue(price, c.principal, c.decimals);\n interest = calculateValue(price, c.interestAccrued, c.decimals);\n\n return (c, principal, interest);\n }\n\n /**\n * @notice - Calculates value of tokens. Used for calculating the USD value of principal and of interest during getOutstandingDebt()\n * @dev - Assumes Oracle returns answers in USD with 1e8 decimals\n * - If price < 0 then we treat it as 0.\n * @param price - The Oracle price of the asset. 8 decimals\n * @param amount - The amount of tokens being valued.\n * @param decimals - Token decimals to remove for USD price\n * @return - The total USD value of the amount of tokens being valued in 8 decimals\n */\n function calculateValue(int price, uint256 amount, uint8 decimals) public pure returns (uint256) {\n return price <= 0 ? 0 : (amount * uint(price)) / (1 * 10 ** decimals);\n }\n\n /**\n * see ILineOfCredit._createCredit\n * @notice called by LineOfCredit._createCredit during every repayment function\n * @param oracle - interset rate contract used by line that will calculate interest owed\n */\n function create(\n bytes32 id,\n uint256 amount,\n address lender,\n address token,\n address oracle\n ) external returns (ILineOfCredit.Credit memory credit) {\n int price = IOracle(oracle).getLatestAnswer(token);\n if (price <= 0) {\n revert NoTokenPrice();\n }\n\n (bool passed, bytes memory result) = token.call(abi.encodeWithSignature(\"decimals()\"));\n\n if (!passed || result.length == 0) {\n revert InvalidTokenDecimals();\n }\n\n uint8 decimals = abi.decode(result, (uint8));\n\n credit = ILineOfCredit.Credit({\n lender: lender,\n token: token,\n decimals: decimals,\n deposit: amount,\n principal: 0,\n interestAccrued: 0,\n interestRepaid: 0,\n isOpen: true\n });\n\n emit AddCredit(lender, token, amount, id);\n\n return credit;\n }\n\n /**\n * see ILineOfCredit._repay\n * @notice called by LineOfCredit._repay during every repayment function\n * @dev uses uncheckd math. assumes checks have been done in caller\n * @param credit - The lender position being repaid\n */\n function repay(\n ILineOfCredit.Credit memory credit,\n bytes32 id,\n uint256 amount,\n address payer\n ) external returns (ILineOfCredit.Credit memory) {\n if (!credit.isOpen) {\n revert PositionIsClosed();\n }\n\n unchecked {\n if (amount > credit.principal + credit.interestAccrued) {\n revert RepayAmountExceedsDebt(credit.principal + credit.interestAccrued);\n }\n\n if (amount <= credit.interestAccrued) {\n credit.interestAccrued -= amount;\n credit.interestRepaid += amount;\n emit RepayInterest(id, amount);\n } else {\n uint256 interest = credit.interestAccrued;\n uint256 principalPayment = amount - interest;\n\n // update individual credit line denominated in token\n credit.principal -= principalPayment;\n credit.interestRepaid += interest;\n credit.interestAccrued = 0;\n\n emit RepayInterest(id, interest);\n emit RepayPrincipal(id, principalPayment);\n }\n }\n\n // if we arent using funds from reserves to repay then pull tokens from target\n if(payer != address(0)) {\n LineLib.receiveTokenOrETH(credit.token, payer, amount);\n }\n\n return credit;\n }\n\n /**\n * see ILineOfCredit.withdraw\n * @notice called by LineOfCredit.withdraw during every repayment function\n * @dev uses uncheckd math. assumes checks have been done in caller\n * @param credit - The lender position that is being bwithdrawn from\n */\n function withdraw(\n ILineOfCredit.Credit memory credit,\n bytes32 id,\n address caller,\n uint256 amount\n ) external returns (ILineOfCredit.Credit memory) {\n if (caller != credit.lender) {\n revert CallerAccessDenied();\n }\n\n unchecked {\n if (amount > credit.deposit - credit.principal + credit.interestRepaid) {\n revert ILineOfCredit.NoLiquidity();\n }\n\n if (amount > credit.interestRepaid) {\n uint256 interest = credit.interestRepaid;\n\n credit.deposit -= amount - interest;\n credit.interestRepaid = 0;\n\n // emit events before setting to 0\n emit WithdrawDeposit(id, amount - interest);\n emit WithdrawProfit(id, interest);\n } else {\n credit.interestRepaid -= amount;\n emit WithdrawProfit(id, amount);\n }\n }\n\n LineLib.sendOutTokenOrETH(credit.token, credit.lender, amount);\n\n return credit;\n }\n\n /**\n * see ILineOfCredit._accrue\n * @notice called by LineOfCredit._accrue during every repayment function\n * @dev public to use in `getOutstandingDebt`\n * @param interest - interset rate contract used by line that will calculate interest owed\n */\n function accrue(\n ILineOfCredit.Credit memory credit,\n bytes32 id,\n address interest\n ) public returns (ILineOfCredit.Credit memory) {\n if (!credit.isOpen) {\n return credit;\n }\n unchecked {\n // interest will almost always be less than deposit\n // low risk of overflow unless extremely high interest rate\n\n // get token demoninated interest accrued\n uint256 accruedToken = IInterestRateCredit(interest).accrueInterest(id, credit.principal, credit.deposit);\n\n // update credit line balance\n credit.interestAccrued += accruedToken;\n\n emit InterestAccrued(id, accruedToken);\n return credit;\n }\n }\n\n function interestAccrued(\n ILineOfCredit.Credit memory credit,\n bytes32 id,\n address interest\n ) external view returns (uint256) {\n return\n credit.interestAccrued +\n IInterestRateCredit(interest).getInterestAccrued(id, credit.principal, credit.deposit);\n }\n\n function getNextRateInQ(uint256 principal, bytes32 id, address interest) external view returns (uint128, uint128) {\n if (principal == 0) {\n revert NoQueue();\n } else {\n return IInterestRateCredit(interest).getRates(id);\n }\n }\n}\n" | |
| }, | |
| "contracts/utils/LineLib.sol": { | |
| "content": "pragma solidity 0.8.16;\nimport {IInterestRateCredit} from \"../interfaces/IInterestRateCredit.sol\";\nimport {ILineOfCredit} from \"../interfaces/ILineOfCredit.sol\";\nimport {IOracle} from \"../interfaces/IOracle.sol\";\nimport {IERC20} from \"openzeppelin/token/ERC20/IERC20.sol\";\nimport {SafeERC20} from \"openzeppelin/token/ERC20/utils/SafeERC20.sol\";\nimport {Denominations} from \"chainlink/Denominations.sol\";\n\n/**\n * @title Debt DAO Line of Credit Library\n * @author Kiba Gateaux\n * @notice Core logic and variables to be reused across all Debt DAO Marketplace Line of Credit contracts\n */\nlibrary LineLib {\n using SafeERC20 for IERC20;\n\n address constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // mainnet WETH\n\n error EthSentWithERC20();\n error TransferFailed();\n error SendingEthFailed();\n error RefundEthFailed();\n\n error BadToken();\n\n event RefundIssued(address indexed recipient, uint256 value);\n\n enum STATUS {\n UNINITIALIZED,\n ACTIVE,\n LIQUIDATABLE,\n REPAID,\n INSOLVENT\n }\n\n /**\n * @notice - Send ETH or ERC20 token from this contract to an external contract\n * @param token - address of token to send out. Denominations.ETH for raw ETH\n * @param receiver - address to send tokens to\n * @param amount - amount of tokens to send\n */\n function sendOutTokenOrETH(address token, address receiver, uint256 amount) external returns (bool) {\n if (token == address(0)) {\n revert TransferFailed();\n }\n\n // both branches revert if call failed\n if (token != Denominations.ETH) {\n // ERC20\n IERC20(token).safeTransfer(receiver, amount);\n } else {\n // ETH\n bool success = _safeTransferFunds(receiver, amount);\n if (!success) {\n revert SendingEthFailed();\n }\n }\n return true;\n }\n\n /**\n * @notice - Receive ETH or ERC20 token at this contract from an external contract\n * @dev - If the sender overpays, the difference will be refunded to the sender\n * @dev - If the sender is unable to receive the refund, it will be diverted to the calling contract\n * @param token - address of token to receive. Denominations.ETH for raw ETH\n * @param sender - address that is sendingtokens/ETH\n * @param amount - amount of tokens to send\n */\n function receiveTokenOrETH(address token, address sender, uint256 amount) external returns (bool) {\n if (token == address(0)) {\n revert TransferFailed();\n }\n if (token != Denominations.ETH) {\n // ERC20\n if (msg.value != 0) {\n revert EthSentWithERC20();\n }\n IERC20(token).safeTransferFrom(sender, address(this), amount);\n } else {\n // ETH\n if (msg.value < amount) {\n revert TransferFailed();\n }\n\n if (msg.value > amount) {\n uint256 refund = msg.value - amount;\n\n if (_safeTransferFunds(msg.sender, refund)) {\n emit RefundIssued(msg.sender, refund);\n }\n }\n }\n return true;\n }\n\n /**\n * @notice - Helper function to get current balance of this contract for ERC20 or ETH\n * @param token - address of token to check. Denominations.ETH for raw ETH\n */\n function getBalance(address token) external view returns (uint256) {\n if (token == address(0)) return 0;\n return token != Denominations.ETH ? IERC20(token).balanceOf(address(this)) : address(this).balance;\n }\n\n /**\n * @notice - Helper function to safely transfer Eth using native call\n * @dev - Errors should be handled in the calling function\n * @param recipient - address of the recipient\n * @param value - value to be sent (in wei)\n */\n function _safeTransferFunds(address recipient, uint256 value) internal returns (bool success) {\n (success, ) = payable(recipient).call{value: value}(\"\");\n }\n}\n" | |
| }, | |
| "lib/chainlink/contracts/src/v0.8/Denominations.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nlibrary Denominations {\n address public constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n address public constant BTC = 0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB;\n\n // Fiat currencies follow https://en.wikipedia.org/wiki/ISO_4217\n address public constant USD = address(840);\n address public constant GBP = address(826);\n address public constant EUR = address(978);\n address public constant JPY = address(392);\n address public constant KRW = address(410);\n address public constant CNY = address(156);\n address public constant AUD = address(36);\n address public constant CAD = address(124);\n address public constant CHF = address(756);\n address public constant ARS = address(32);\n address public constant PHP = address(608);\n address public constant NZD = address(554);\n address public constant SGD = address(702);\n address public constant NGN = address(566);\n address public constant ZAR = address(710);\n address public constant RUB = address(643);\n address public constant INR = address(356);\n address public constant BRL = address(986);\n}\n" | |
| }, | |
| "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n" | |
| }, | |
| "lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Permit.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20Permit {\n /**\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n * given ``owner``'s signed approval.\n *\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n * ordering also apply here.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `deadline` must be a timestamp in the future.\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n * over the EIP712-formatted function arguments.\n * - the signature must use ``owner``'s current nonce (see {nonces}).\n *\n * For more information on the signature format, see the\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n * section].\n */\n function permit(\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n\n /**\n * @dev Returns the current nonce for `owner`. This value must be\n * included whenever a signature is generated for {permit}.\n *\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\n * prevents a signature from being used multiple times.\n */\n function nonces(address owner) external view returns (uint256);\n\n /**\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n" | |
| }, | |
| "lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n function safeTransfer(\n IERC20 token,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(\n IERC20 token,\n address from,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n uint256 newAllowance = token.allowance(address(this), spender) + value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n uint256 newAllowance = oldAllowance - value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n }\n\n function safePermit(\n IERC20Permit token,\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal {\n uint256 nonceBefore = token.nonces(owner);\n token.permit(owner, spender, value, deadline, v, r, s);\n uint256 nonceAfter = token.nonces(owner);\n require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) {\n // Return data is optional\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n" | |
| }, | |
| "lib/openzeppelin-contracts/contracts/utils/Address.sol": { | |
| "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n" | |
| } | |
| }, | |
| "settings": { | |
| "remappings": [ | |
| "chainlink/=lib/chainlink/contracts/src/v0.8/", | |
| "ds-test/=lib/forge-std/lib/ds-test/src/", | |
| "forge-std/=lib/forge-std/src/", | |
| "openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/", | |
| "openzeppelin/=lib/openzeppelin-contracts/contracts/" | |
| ], | |
| "optimizer": { | |
| "enabled": true, | |
| "runs": 100 | |
| }, | |
| "metadata": { | |
| "bytecodeHash": "ipfs" | |
| }, | |
| "outputSelection": { | |
| "*": { | |
| "*": [ | |
| "evm.bytecode", | |
| "evm.deployedBytecode", | |
| "devdoc", | |
| "userdoc", | |
| "metadata", | |
| "abi" | |
| ] | |
| } | |
| }, | |
| "evmVersion": "london", | |
| "libraries": { | |
| "contracts/utils/LineLib.sol": { | |
| "LineLib": "0x5250c45087cdAA3dACCBe44BdA987A1f7f3edb02" | |
| } | |
| } | |
| } | |
| } |