{
    "Function": "onERC721Received",
    "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": [],
    "Internal Calls": [
        "revert WrongContract()",
        "_cleanupLoan",
        "_updateAndCheckCollateral",
        "abi.decode()",
        "_addTokenToOwner",
        "_addTokenToOwner",
        "_updateGlobalInterest"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function onERC721Received(address, address from, uint256 tokenId, bytes calldata data)\n        external\n        override\n        returns (bytes4)\n    {\n        // only Uniswap v3 NFTs allowed - sent from other contract\n        if (msg.sender != address(nonfungiblePositionManager) || from == address(this)) {\n            revert WrongContract();\n        }\n\n        (uint256 debtExchangeRateX96, uint256 lendExchangeRateX96) = _updateGlobalInterest();\n\n        if (transformedTokenId == 0) {\n            address owner = from;\n            if (data.length > 0) {\n                owner = abi.decode(data, (address));\n            }\n            loans[tokenId] = Loan(0);\n\n            _addTokenToOwner(owner, tokenId);\n            emit Add(tokenId, owner, 0);\n        } else {\n            uint256 oldTokenId = transformedTokenId;\n\n            // if in transform mode - and a new position is sent - current position is replaced and returned\n            if (tokenId != oldTokenId) {\n                address owner = tokenOwner[oldTokenId];\n\n                // set transformed token to new one\n                transformedTokenId = tokenId;\n\n                // copy debt to new token\n                loans[tokenId] = Loan(loans[oldTokenId].debtShares);\n\n                _addTokenToOwner(owner, tokenId);\n                emit Add(tokenId, owner, oldTokenId);\n\n                // clears data of old loan\n                _cleanupLoan(oldTokenId, debtExchangeRateX96, lendExchangeRateX96, owner);\n\n                // sets data of new loan\n                _updateAndCheckCollateral(\n                    tokenId, debtExchangeRateX96, lendExchangeRateX96, 0, loans[tokenId].debtShares\n                );\n            }\n        }\n\n        return IERC721Receiver.onERC721Received.selector;\n    }"
}