{
    "Function": "repurchase",
    "File": "contracts/vaults/NFTVault.sol",
    "Parent Contracts": [
        "node_modules/@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"
    ],
    "High-Level Calls": [
        "EnumerableSetUpgradeable",
        "IStableCoin",
        "IERC721Upgradeable"
    ],
    "Internal Calls": [
        "require(bool,string)",
        "validNFTIndex",
        "require(bool,string)",
        "require(bool,string)",
        "require(bool,string)"
    ],
    "Library Calls": [
        "remove"
    ],
    "Low-Level Calls": [],
    "Code": "function repurchase(uint256 _nftIndex) external validNFTIndex(_nftIndex) {\n        Position memory position = positions[_nftIndex];\n        require(msg.sender == positionOwner[_nftIndex], \"unauthorized\");\n        require(position.liquidatedAt > 0, \"not_liquidated\");\n        require(\n            position.borrowType == BorrowType.USE_INSURANCE,\n            \"non_insurance\"\n        );\n        require(\n            position.liquidatedAt + settings.insuraceRepurchaseTimeLimit >=\n                block.timestamp,\n            \"insurance_expired\"\n        );\n\n        uint256 debtAmount = position.debtAmountForRepurchase;\n        uint256 penalty = (debtAmount *\n            settings.insuranceLiquidationPenaltyRate.numerator) /\n            settings.insuranceLiquidationPenaltyRate.denominator;\n\n        // transfer payment to liquidator\n        stablecoin.transferFrom(\n            msg.sender,\n            position.liquidator,\n            debtAmount + penalty\n        );\n\n        // transfer nft to user\n        positionOwner[_nftIndex] = address(0);\n        delete positions[_nftIndex];\n        positionIndexes.remove(_nftIndex);\n\n        nftContract.safeTransferFrom(address(this), msg.sender, _nftIndex);\n\n        emit Repurchased(msg.sender, _nftIndex);\n    }"
}