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            "src": "13438:419:2"
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                        "nodeType": "YulIdentifier",
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                  "body": {
                    "nodeType": "YulBlock",
                    "src": "14025:22:2",
                    "statements": [
                      {
                        "expression": {
                          "arguments": [],
                          "functionName": {
                            "name": "panic_error_0x11",
                            "nodeType": "YulIdentifier",
                            "src": "14027:16:2"
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                        "src": "14027:18:2"
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                        "name": "x",
                        "nodeType": "YulIdentifier",
                        "src": "14017:1:2"
                      },
                      {
                        "name": "sum",
                        "nodeType": "YulIdentifier",
                        "src": "14020:3:2"
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                    ],
                    "functionName": {
                      "name": "gt",
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                    "nodeType": "YulFunctionCall",
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            "name": "checked_add_t_uint256",
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                "name": "x",
                "nodeType": "YulTypedName",
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      },
      "contents": "{\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() {\n        revert(0, 0)\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n    function panic_error_0x41() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x41)\n        revert(0, 0x24)\n    }\n\n    function finalize_allocation(memPtr, size) {\n        let newFreePtr := add(memPtr, round_up_to_mul_of_32(size))\n        // protect against overflow\n        if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n        mstore(64, newFreePtr)\n    }\n\n    function allocate_memory(size) -> memPtr {\n        memPtr := allocate_unbounded()\n        finalize_allocation(memPtr, size)\n    }\n\n    function array_allocation_size_t_array$_t_address_$dyn_memory_ptr(length) -> size {\n        // Make sure we can allocate memory without overflow\n        if gt(length, 0xffffffffffffffff) { panic_error_0x41() }\n\n        size := mul(length, 0x20)\n\n        // add length slot\n        size := add(size, 0x20)\n\n    }\n\n    function revert_error_81385d8c0b31fffe14be1da910c8bd3a80be4cfa248e04f42ec0faea3132a8ef() {\n        revert(0, 0)\n    }\n\n    function cleanup_t_uint160(value) -> cleaned {\n        cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n    }\n\n    function cleanup_t_address(value) -> cleaned {\n        cleaned := cleanup_t_uint160(value)\n    }\n\n    function validator_revert_t_address(value) {\n        if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_address(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_address(value)\n    }\n\n    // address[]\n    function abi_decode_available_length_t_array$_t_address_$dyn_memory_ptr(offset, length, end) -> array {\n        array := allocate_memory(array_allocation_size_t_array$_t_address_$dyn_memory_ptr(length))\n        let dst := array\n\n        mstore(array, length)\n        dst := add(array, 0x20)\n\n        let srcEnd := add(offset, mul(length, 0x20))\n        if gt(srcEnd, end) {\n            revert_error_81385d8c0b31fffe14be1da910c8bd3a80be4cfa248e04f42ec0faea3132a8ef()\n        }\n        for { let src := offset } lt(src, srcEnd) { src := add(src, 0x20) }\n        {\n\n            let elementPos := src\n\n            mstore(dst, abi_decode_t_address(elementPos, end))\n            dst := add(dst, 0x20)\n        }\n    }\n\n    // address[]\n    function abi_decode_t_array$_t_address_$dyn_memory_ptr(offset, end) -> array {\n        if iszero(slt(add(offset, 0x1f), end)) { revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() }\n        let length := calldataload(offset)\n        array := abi_decode_available_length_t_array$_t_address_$dyn_memory_ptr(add(offset, 0x20), length, end)\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function validator_revert_t_uint256(value) {\n        if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_uint256(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_array$_t_address_$dyn_memory_ptrt_uint256(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := calldataload(add(headStart, 0))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value0 := abi_decode_t_array$_t_address_$dyn_memory_ptr(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function identity(value) -> ret {\n        ret := value\n    }\n\n    function convert_t_uint160_to_t_uint160(value) -> converted {\n        converted := cleanup_t_uint160(identity(cleanup_t_uint160(value)))\n    }\n\n    function convert_t_uint160_to_t_address(value) -> converted {\n        converted := convert_t_uint160_to_t_uint160(value)\n    }\n\n    function convert_t_contract$_IERC20_$255_to_t_address(value) -> converted {\n        converted := convert_t_uint160_to_t_address(value)\n    }\n\n    function abi_encode_t_contract$_IERC20_$255_to_t_address_fromStack(value, pos) {\n        mstore(pos, convert_t_contract$_IERC20_$255_to_t_address(value))\n    }\n\n    function abi_encode_tuple_t_contract$_IERC20_$255__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_contract$_IERC20_$255_to_t_address_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_t_address_to_t_address_fromStack(value, pos) {\n        mstore(pos, cleanup_t_address(value))\n    }\n\n    function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function array_allocation_size_t_array$_t_uint256_$dyn_memory_ptr(length) -> size {\n        // Make sure we can allocate memory without overflow\n        if gt(length, 0xffffffffffffffff) { panic_error_0x41() }\n\n        size := mul(length, 0x20)\n\n        // add length slot\n        size := add(size, 0x20)\n\n    }\n\n    // uint256[]\n    function abi_decode_available_length_t_array$_t_uint256_$dyn_memory_ptr(offset, length, end) -> array {\n        array := allocate_memory(array_allocation_size_t_array$_t_uint256_$dyn_memory_ptr(length))\n        let dst := array\n\n        mstore(array, length)\n        dst := add(array, 0x20)\n\n        let srcEnd := add(offset, mul(length, 0x20))\n        if gt(srcEnd, end) {\n            revert_error_81385d8c0b31fffe14be1da910c8bd3a80be4cfa248e04f42ec0faea3132a8ef()\n        }\n        for { let src := offset } lt(src, srcEnd) { src := add(src, 0x20) }\n        {\n\n            let elementPos := src\n\n            mstore(dst, abi_decode_t_uint256(elementPos, end))\n            dst := add(dst, 0x20)\n        }\n    }\n\n    // uint256[]\n    function abi_decode_t_array$_t_uint256_$dyn_memory_ptr(offset, end) -> array {\n        if iszero(slt(add(offset, 0x1f), end)) { revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() }\n        let length := calldataload(offset)\n        array := abi_decode_available_length_t_array$_t_uint256_$dyn_memory_ptr(add(offset, 0x20), length, end)\n    }\n\n    function abi_decode_tuple_t_array$_t_address_$dyn_memory_ptrt_array$_t_uint256_$dyn_memory_ptr(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := calldataload(add(headStart, 0))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value0 := abi_decode_t_array$_t_address_$dyn_memory_ptr(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := calldataload(add(headStart, 32))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value1 := abi_decode_t_array$_t_uint256_$dyn_memory_ptr(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function store_literal_in_memory_ef6a3411fb5c5fc2433439db99f7c89a0cac8abad0ff0bb4b26c8e85ed64f700(memPtr) {\n\n        mstore(add(memPtr, 0), \"Only the owner can airdrop token\")\n\n        mstore(add(memPtr, 32), \"s\")\n\n    }\n\n    function abi_encode_t_stringliteral_ef6a3411fb5c5fc2433439db99f7c89a0cac8abad0ff0bb4b26c8e85ed64f700_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 33)\n        store_literal_in_memory_ef6a3411fb5c5fc2433439db99f7c89a0cac8abad0ff0bb4b26c8e85ed64f700(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_ef6a3411fb5c5fc2433439db99f7c89a0cac8abad0ff0bb4b26c8e85ed64f700__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_ef6a3411fb5c5fc2433439db99f7c89a0cac8abad0ff0bb4b26c8e85ed64f700_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function checked_mul_t_uint256(x, y) -> product {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n        let product_raw := mul(x, y)\n        product := cleanup_t_uint256(product_raw)\n\n        // overflow, if x != 0 and y != product/x\n        if iszero(\n            or(\n                iszero(x),\n                eq(y, div(product, x))\n            )\n        ) { panic_error_0x11() }\n\n    }\n\n    function abi_decode_t_uint256_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_uint256_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_uint256_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function store_literal_in_memory_959505d6981f86f0c6cd07dec1d06d3184e540da7045476dc2b1bea329849d7c(memPtr) {\n\n        mstore(add(memPtr, 0), \"Not enough tokens in the contrac\")\n\n        mstore(add(memPtr, 32), \"t\")\n\n    }\n\n    function abi_encode_t_stringliteral_959505d6981f86f0c6cd07dec1d06d3184e540da7045476dc2b1bea329849d7c_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 33)\n        store_literal_in_memory_959505d6981f86f0c6cd07dec1d06d3184e540da7045476dc2b1bea329849d7c(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_959505d6981f86f0c6cd07dec1d06d3184e540da7045476dc2b1bea329849d7c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_959505d6981f86f0c6cd07dec1d06d3184e540da7045476dc2b1bea329849d7c_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function panic_error_0x32() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x32)\n        revert(0, 0x24)\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_tuple_t_address_t_uint256__to_t_address_t_uint256__fromStack_reversed(headStart , value1, value0) -> tail {\n        tail := add(headStart, 64)\n\n        abi_encode_t_address_to_t_address_fromStack(value0,  add(headStart, 0))\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value1,  add(headStart, 32))\n\n    }\n\n    function cleanup_t_bool(value) -> cleaned {\n        cleaned := iszero(iszero(value))\n    }\n\n    function validator_revert_t_bool(value) {\n        if iszero(eq(value, cleanup_t_bool(value))) { revert(0, 0) }\n    }\n\n    function abi_decode_t_bool_fromMemory(offset, end) -> value {\n        value := mload(offset)\n        validator_revert_t_bool(value)\n    }\n\n    function abi_decode_tuple_t_bool_fromMemory(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_bool_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function increment_t_uint256(value) -> ret {\n        value := cleanup_t_uint256(value)\n        if eq(value, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) { panic_error_0x11() }\n        ret := add(value, 1)\n    }\n\n    function store_literal_in_memory_31f2af5ae83334dfa9b78b6ea60c485e66b37669ad1a64693eaf990327f67b3a(memPtr) {\n\n        mstore(add(memPtr, 0), \"The length of the two arrays mus\")\n\n        mstore(add(memPtr, 32), \"t be the same\")\n\n    }\n\n    function abi_encode_t_stringliteral_31f2af5ae83334dfa9b78b6ea60c485e66b37669ad1a64693eaf990327f67b3a_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 45)\n        store_literal_in_memory_31f2af5ae83334dfa9b78b6ea60c485e66b37669ad1a64693eaf990327f67b3a(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_tuple_t_stringliteral_31f2af5ae83334dfa9b78b6ea60c485e66b37669ad1a64693eaf990327f67b3a__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_31f2af5ae83334dfa9b78b6ea60c485e66b37669ad1a64693eaf990327f67b3a_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function checked_add_t_uint256(x, y) -> sum {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n        sum := add(x, y)\n\n        if gt(x, sum) { panic_error_0x11() }\n\n    }\n\n}\n",
      "id": 2,
      "language": "Yul",
      "name": "#utility.yul"
    }
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  "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\n\ncontract Airdrop {\n    IERC20 public tokenContract; // 代币合约\n    address public owner; // 合约发布者\n\n    constructor(address _tokenContractAddress) {\n        tokenContract = IERC20(_tokenContractAddress);\n        owner = msg.sender;\n    }\n\n    // 空投代币，多个地址对应一个数量\n    function oneToMany(address[] memory _to, uint256 _amount) public {\n        // 只有合约发布者可以调用\n        require(msg.sender == owner, \"Only the owner can airdrop tokens\");\n        // 验证合约中的代币数量是否足够\n        uint256 totalAmount = _amount * _to.length;\n        require(\n            tokenContract.balanceOf(address(this)) >= totalAmount,\n            \"Not enough tokens in the contract\"\n        );\n        // 空投代币\n        for (uint256 i = 0; i < _to.length; i++) {\n            tokenContract.transfer(_to[i], _amount);\n        }\n    }\n\n    // 空投代币，一个地址对应一个数量\n    function oneToOne(address[] memory _to, uint256[] memory _amount) public {\n        // 只有合约发布者可以调用\n        require(msg.sender == owner, \"Only the owner can airdrop tokens\");\n        // 验证数组长度是否相等\n        require(\n            _to.length == _amount.length,\n            \"The length of the two arrays must be the same\"\n        );\n        // 验证合约中的代币是否足够\n        uint256 totalAmount = 0;\n        for (uint256 i = 0; i < _amount.length; i++) {\n            totalAmount += _amount[i];\n        }\n        require(\n            tokenContract.balanceOf(address(this)) >= totalAmount,\n            \"Not enough tokens in the contract\"\n        );\n        // 空投代币\n        for (uint256 i = 0; i < _to.length; i++) {\n            tokenContract.transfer(_to[i], _amount[i]);\n        }\n    }\n}\n",
  "sourcePath": "/Users/luzhenqian/Work/web3/web3-examples/contract/noah-token/contracts/Airdrop.sol",
  "ast": {
    "absolutePath": "project:/contracts/Airdrop.sol",
    "exportedSymbols": {
      "Airdrop": [
        171
      ],
      "IERC20": [
        255
      ]
    },
    "id": 172,
    "license": "MIT",
    "nodeType": "SourceUnit",
    "nodes": [
      {
        "id": 1,
        "literals": [
          "solidity",
          "^",
          "0.8",
          ".0"
        ],
        "nodeType": "PragmaDirective",
        "src": "33:23:0"
      },
      {
        "absolutePath": "project:/contracts/IERC20.sol",
        "file": "./IERC20.sol",
        "id": 2,
        "nameLocation": "-1:-1:-1",
        "nodeType": "ImportDirective",
        "scope": 172,
        "sourceUnit": 256,
        "src": "58:22:0",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "abstract": false,
        "baseContracts": [],
        "canonicalName": "Airdrop",
        "contractDependencies": [],
        "contractKind": "contract",
        "fullyImplemented": true,
        "id": 171,
        "linearizedBaseContracts": [
          171
        ],
        "name": "Airdrop",
        "nameLocation": "91:7:0",
        "nodeType": "ContractDefinition",
        "nodes": [
          {
            "constant": false,
            "functionSelector": "55a373d6",
            "id": 5,
            "mutability": "mutable",
            "name": "tokenContract",
            "nameLocation": "119:13:0",
            "nodeType": "VariableDeclaration",
            "scope": 171,
            "src": "105:27:0",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_contract$_IERC20_$255",
              "typeString": "contract IERC20"
            },
            "typeName": {
              "id": 4,
              "nodeType": "UserDefinedTypeName",
              "pathNode": {
                "id": 3,
                "name": "IERC20",
                "nameLocations": [
                  "105:6:0"
                ],
                "nodeType": "IdentifierPath",
                "referencedDeclaration": 255,
                "src": "105:6:0"
              },
              "referencedDeclaration": 255,
              "src": "105:6:0",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_IERC20_$255",
                "typeString": "contract IERC20"
              }
            },
            "visibility": "public"
          },
          {
            "constant": false,
            "functionSelector": "8da5cb5b",
            "id": 7,
            "mutability": "mutable",
            "name": "owner",
            "nameLocation": "169:5:0",
            "nodeType": "VariableDeclaration",
            "scope": 171,
            "src": "154:20:0",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_address",
              "typeString": "address"
            },
            "typeName": {
              "id": 6,
              "name": "address",
              "nodeType": "ElementaryTypeName",
              "src": "154:7:0",
              "stateMutability": "nonpayable",
              "typeDescriptions": {
                "typeIdentifier": "t_address",
                "typeString": "address"
              }
            },
            "visibility": "public"
          },
          {
            "body": {
              "id": 23,
              "nodeType": "Block",
              "src": "243:90:0",
              "statements": [
                {
                  "expression": {
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                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
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                      "name": "tokenContract",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 5,
                      "src": "253:13:0",
                      "typeDescriptions": {
                        "typeIdentifier": "t_contract$_IERC20_$255",
                        "typeString": "contract IERC20"
                      }
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                    "nodeType": "Assignment",
                    "operator": "=",
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                          "id": 14,
                          "name": "_tokenContractAddress",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 9,
                          "src": "276:21:0",
                          "typeDescriptions": {
                            "typeIdentifier": "t_address",
                            "typeString": "address"
                          }
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                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_address",
                            "typeString": "address"
                          }
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                        "id": 13,
                        "name": "IERC20",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 255,
                        "src": "269:6:0",
                        "typeDescriptions": {
                          "typeIdentifier": "t_type$_t_contract$_IERC20_$255_$",
                          "typeString": "type(contract IERC20)"
                        }
                      },
                      "id": 15,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "typeConversion",
                      "lValueRequested": false,
                      "nameLocations": [],
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "269:29:0",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_contract$_IERC20_$255",
                        "typeString": "contract IERC20"
                      }
                    },
                    "src": "253:45:0",
                    "typeDescriptions": {
                      "typeIdentifier": "t_contract$_IERC20_$255",
                      "typeString": "contract IERC20"
                    }
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                  "nodeType": "ExpressionStatement",
                  "src": "253:45:0"
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