{
    "Function": "transform",
    "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": [
        "INonfungiblePositionManager",
        "INonfungiblePositionManager",
        "INonfungiblePositionManager"
    ],
    "Internal Calls": [
        "revert Unauthorized()",
        "revert Unauthorized()",
        "_convertToAssets",
        "revert TransformFailed()",
        "_requireLoanIsHealthy",
        "_updateGlobalInterest",
        "revert TransformNotAllowed()",
        "revert Reentrancy()"
    ],
    "Library Calls": [],
    "Low-Level Calls": [
        "call"
    ],
    "Code": "function transform(uint256 tokenId, address transformer, bytes calldata data)\n        external\n        override\n        returns (uint256 newTokenId)\n    {\n        if (tokenId == 0 || !transformerAllowList[transformer]) {\n            revert TransformNotAllowed();\n        }\n        if (transformedTokenId > 0) {\n            revert Reentrancy();\n        }\n        transformedTokenId = tokenId;\n\n        (uint256 newDebtExchangeRateX96,) = _updateGlobalInterest();\n\n        address loanOwner = tokenOwner[tokenId];\n\n        // only the owner of the loan, the vault itself or any approved caller can call this\n        if (loanOwner != msg.sender && !transformApprovals[loanOwner][tokenId][msg.sender]) {\n            revert Unauthorized();\n        }\n\n        // give access to transformer\n        nonfungiblePositionManager.approve(transformer, tokenId);\n\n        (bool success,) = transformer.call(data);\n        if (!success) {\n            revert TransformFailed();\n        }\n\n        // may have changed in the meantime\n        tokenId = transformedTokenId;\n\n        // check owner not changed (NEEDED because token could have been moved somewhere else in the meantime)\n        address owner = nonfungiblePositionManager.ownerOf(tokenId);\n        if (owner != address(this)) {\n            revert Unauthorized();\n        }\n\n        // remove access for transformer\n        nonfungiblePositionManager.approve(address(0), tokenId);\n\n        uint256 debt = _convertToAssets(loans[tokenId].debtShares, newDebtExchangeRateX96, Math.Rounding.Up);\n        _requireLoanIsHealthy(tokenId, debt);\n\n        transformedTokenId = 0;\n\n        return tokenId;\n    }"
}