{
    "Function": "_burnTokenFrom",
    "File": "contracts/gmp-sdk/test/MockGateway.sol",
    "Parent Contracts": [
        "contracts/gmp-sdk/interfaces/IAxelarGateway.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "_callERC20Token",
        "abi.encodeWithSelector()",
        "tokenAddresses",
        "revert TokenDoesNotExist(string)",
        "_getTokenType",
        "_callERC20Token",
        "revert BurnFailed(string)",
        "abi.encodeWithSelector()",
        "revert InvalidAmount()",
        "revert BurnFailed(string)"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function _burnTokenFrom(\n        address sender,\n        string memory symbol,\n        uint256 amount\n    ) internal {\n        address tokenAddress = tokenAddresses(symbol);\n\n        if (tokenAddress == address(0)) revert TokenDoesNotExist(symbol);\n        if (amount == 0) revert InvalidAmount();\n\n        TokenType tokenType = _getTokenType(symbol);\n        bool burnSuccess;\n\n        if (tokenType == TokenType.External) {\n            burnSuccess = _callERC20Token(\n                tokenAddress,\n                abi.encodeWithSelector(IERC20.transferFrom.selector, sender, address(this), amount)\n            );\n\n            if (!burnSuccess) revert BurnFailed(symbol);\n\n            return;\n        }\n\n        if (tokenType == TokenType.InternalBurnableFrom) {\n            burnSuccess = _callERC20Token(tokenAddress, abi.encodeWithSelector(IERC20MintableBurnable.burn.selector, sender, amount));\n\n            if (!burnSuccess) revert BurnFailed(symbol);\n\n            return;\n        }\n    }"
}