{
    "Function": "_repay",
    "File": "src/V3Vault.sol",
    "Parent Contracts": [
        "src/interfaces/IErrors.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721Receiver.sol",
        "src/interfaces/IVault.sol",
        "lib/openzeppelin-contracts/contracts/interfaces/IERC4626.sol",
        "lib/openzeppelin-contracts/contracts/access/Ownable.sol",
        "lib/openzeppelin-contracts/contracts/utils/Multicall.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol",
        "lib/openzeppelin-contracts/contracts/utils/Context.sol"
    ],
    "High-Level Calls": [
        "SafeERC20",
        "IPermit2"
    ],
    "Internal Calls": [
        "_convertToAssets",
        "_convertToShares",
        "revert MinLoanSize()",
        "_updateAndCheckCollateral",
        "revert RepayExceedsDebt()",
        "_cleanupLoan",
        "_updateGlobalInterest",
        "_convertToAssets",
        "abi.decode()"
    ],
    "Library Calls": [
        "safeTransferFrom"
    ],
    "Low-Level Calls": [],
    "Code": "function _repay(uint256 tokenId, uint256 amount, bool isShare, bytes memory permitData) internal {\n        (uint256 newDebtExchangeRateX96, uint256 newLendExchangeRateX96) = _updateGlobalInterest();\n\n        Loan storage loan = loans[tokenId];\n\n        uint256 currentShares = loan.debtShares;\n\n        uint256 shares;\n        uint256 assets;\n\n        if (isShare) {\n            shares = amount;\n            assets = _convertToAssets(amount, newDebtExchangeRateX96, Math.Rounding.Up);\n        } else {\n            assets = amount;\n            shares = _convertToShares(amount, newDebtExchangeRateX96, Math.Rounding.Down);\n        }\n\n        // fails if too much repayed\n        if (shares > currentShares) {\n            revert RepayExceedsDebt();\n        }\n\n        if (assets > 0) {\n            if (permitData.length > 0) {\n                (ISignatureTransfer.PermitTransferFrom memory permit, bytes memory signature) =\n                    abi.decode(permitData, (ISignatureTransfer.PermitTransferFrom, bytes));\n                permit2.permitTransferFrom(\n                    permit, ISignatureTransfer.SignatureTransferDetails(address(this), assets), msg.sender, signature\n                );\n            } else {\n                // fails if not enough token approved\n                SafeERC20.safeTransferFrom(IERC20(asset), msg.sender, address(this), assets);\n            }\n        }\n\n        uint256 loanDebtShares = loan.debtShares - shares;\n        loan.debtShares = loanDebtShares;\n        debtSharesTotal -= shares;\n\n        // when amounts are repayed - they maybe borrowed again\n        dailyDebtIncreaseLimitLeft += assets;\n\n        _updateAndCheckCollateral(\n            tokenId, newDebtExchangeRateX96, newLendExchangeRateX96, loanDebtShares + shares, loanDebtShares\n        );\n\n        address owner = tokenOwner[tokenId];\n\n        // if fully repayed\n        if (currentShares == shares) {\n            _cleanupLoan(tokenId, newDebtExchangeRateX96, newLendExchangeRateX96, owner);\n        } else {\n            // if resulting loan is too small - revert\n            if (_convertToAssets(loanDebtShares, newDebtExchangeRateX96, Math.Rounding.Up) < minLoanSize) {\n                revert MinLoanSize();\n            }\n        }\n\n        emit Repay(tokenId, msg.sender, owner, assets, shares);\n    }"
}