{ "contractName": "PairAToken", "abi": [ { "stateMutability": "payable", "type": "receive" }, { "inputs": [ { "internalType": "address", "name": "input", "type": "address" }, { "internalType": "address", "name": "output", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "name": "swap", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "", "type": "address" }, { "internalType": "address", "name": "", "type": "address" }, { "internalType": "uint256", "name": "amountIn", "type": "uint256" }, { "internalType": "bytes", "name": "", "type": "bytes" } ], "name": "getOutputAmount", "outputs": [ { "internalType": "uint256", "name": "amountOut", "type": "uint256" } ], "stateMutability": "nonpayable", "type": "function" } ], "metadata": 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"source": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.8;\n\nimport \"@openzeppelin/contracts/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/ERC20.sol\";\nimport \"./ISwappaPairV1.sol\";\nimport \"../interfaces/aave/ILendingPool.sol\";\nimport \"../interfaces/aave/ILendingPoolAddressesProvider.sol\";\n\ninterface IAToken {\n\tfunction redeem(uint256 _amount) external;\n}\n\ncontract PairAToken is ISwappaPairV1 {\n\tusing SafeMath for uint;\n\n\tfunction swap(\n\t\taddress input,\n\t\taddress output,\n\t\taddress to,\n\t\tbytes calldata data\n\t) external override {\n\t\t(address providerAddr, uint8 inputType) = parseData(data);\n\t\tuint inputAmount = ERC20(input).balanceOf(address(this));\n\t\tif (inputType == 1) {\n\t\t\t// Redeem AToken.\n\t\t\tIAToken(input).redeem(inputAmount);\n\t\t} else if (inputType == 2) {\n\t\t\t// Deposit CELO.\n\t\t\taddress lendingPoolAddr = ILendingPoolAddressesProvider(providerAddr).getLendingPool();\n\t\t\tILendingPool(lendingPoolAddr).deposit{value: inputAmount}(\n\t\t\t\t0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE,\n\t\t\t\tinputAmount,\n\t\t\t\t0x0);\n\t\t} else if (inputType == 3) {\n\t\t\t// Deposit non CELO AToken.\n\t\t\taddress lendingPoolAddr = ILendingPoolAddressesProvider(providerAddr).getLendingPool();\n\t\t\taddress lendingPoolCoreAddr = ILendingPoolAddressesProvider(providerAddr).getLendingPoolCore();\n\t\t\trequire(\n\t\t\t\tERC20(input).approve(lendingPoolCoreAddr, inputAmount),\n\t\t\t\t\"PairAToken: approve failed!\");\n\t\t\tILendingPool(lendingPoolAddr).deposit(input, inputAmount, 0x0);\n\t\t}\n\t\trequire(\n\t\t\tERC20(output).transfer(to, inputAmount),\n\t\t\t\"PairAToken: transfer failed!\");\n\t}\n\n\tfunction parseData(bytes memory data) private pure returns (address providerAddr, uint8 inputType) {\n\t\trequire(data.length == 21, \"PairAToken: invalid data!\");\n\t\tinputType = uint8(data[20]);\n assembly {\n providerAddr := mload(add(data, 20))\n }\n\t}\n\n\tfunction getOutputAmount(\n\t\taddress,\n\t\taddress,\n\t\tuint amountIn,\n\t\tbytes calldata\n\t) external override returns (uint amountOut) {\n\t\treturn amountIn;\n\t}\n\n\treceive() external payable {}\n}", "sourcePath": "/home/thezviad_gmail_com/src/swappa/contracts/swappa/PairAToken.sol", "ast": { "absolutePath": "project:/contracts/swappa/PairAToken.sol", "exportedSymbols": { "IAToken": [ 5402 ], "PairAToken": [ 5578 ] }, "id": 5579, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 5391, "literals": [ "solidity", "0.6", ".8" ], "nodeType": "PragmaDirective", "src": "32:22:47" }, { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "file": "@openzeppelin/contracts/math/SafeMath.sol", "id": 5392, "nodeType": "ImportDirective", "scope": 5579, "sourceUnit": 219, "src": "56:51:47", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "file": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "id": 5393, "nodeType": "ImportDirective", "scope": 5579, "sourceUnit": 726, "src": "108:55:47", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "project:/contracts/swappa/ISwappaPairV1.sol", "file": "./ISwappaPairV1.sol", "id": 5394, "nodeType": "ImportDirective", "scope": 5579, "sourceUnit": 5326, "src": "164:29:47", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "project:/contracts/interfaces/aave/ILendingPool.sol", "file": "../interfaces/aave/ILendingPool.sol", "id": 5395, "nodeType": "ImportDirective", "scope": 5579, "sourceUnit": 1140, "src": "194:45:47", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "project:/contracts/interfaces/aave/ILendingPoolAddressesProvider.sol", "file": "../interfaces/aave/ILendingPoolAddressesProvider.sol", "id": 5396, "nodeType": "ImportDirective", "scope": 5579, "sourceUnit": 1254, "src": "240:62:47", 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"typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "340:17:47" }, "returnParameters": { "id": 5400, "nodeType": "ParameterList", "parameters": [], "src": "366:0:47" }, "scope": 5402, "src": "325:42:47", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" } ], "scope": 5579, "src": "304:65:47" }, { "abstract": false, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 5403, "name": "ISwappaPairV1", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5325, "src": "394:13:47", "typeDescriptions": { "typeIdentifier": "t_contract$_ISwappaPairV1_$5325", "typeString": "contract ISwappaPairV1" } }, "id": 5404, "nodeType": "InheritanceSpecifier", "src": "394:13:47" } ], "contractDependencies": [ 5325 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 5578, "linearizedBaseContracts": [ 5578, 5325 ], "name": 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