估算智能合約的 Gas 總是失敗

我已經為乙太坊區塊鏈部署了一個非常簡單的合約，以便能夠在兩個不同的輸出中拆分付款。

pragma solidity ^0.5.0;

contract MoonTrade
{
   function multiSendETH(  address payable address1,
                           uint value1,
                           address payable address2,
                           uint value2) public payable
   {
       address1.transfer(value1);
       address2.transfer(value2);

       msg.sender.transfer(address(this).balance);
   }
}

它在 Ropsten 測試網上。 https://ropsten.etherscan.io/address/0x3376a6d3e46496944fe7afd838efb949007b80f4

我正在使用 web3py (python)

但是，每當我嘗試這樣做時，web3.eth.estimateGas()我總是會收到一條錯誤消息：

所需氣體超過限額或交易總是失敗（錯誤程式碼 -32000）

我不確定我在這裡做錯了什麼。

這是我傳遞給估計氣體的輸入：

{'to': 0x3376a6D3e46496944fe7afD838EfB949007B80f4, 
   'from': 0xF811E7eD1BBc908f33b1C298087220D249bE0464, 
   'value': 50000000000000000, 
   'data': b'{"name": "multiSendETH", "types": ["address","uint256","address","uint256"],"inputs":["0xbe623C1f9F47d2105f80A9A5c0Cd90562be5fA58", "40000000000000000","0x366de12a1A6fd0B140153f011c1A085314A047BC", "10000000000000000"]}'}

數據部分顯然web3.toBytes()在傳遞到估計氣體函式之前使用轉換為字節。

我不知道這個錯誤是否與我的智能合約或我將參數傳遞給估計氣體的方式有關。

有任何想法嗎？

這是我的調試輸出：

ABI: [{"constant": false,"inputs": [{"name": "address1","type": "address"},{"name": "value1","type": "uint256"},{"name": "address2","type": "address"},{"name": "value2","type": "uint256"}],"name": "multiSendETH","outputs": [],"payable": true,"stateMutability": "payable","type": "function"}]

Contract address: 0x60946D10048EC9fbB0A260bb17da2eFEbdb76F12

Estimate gas data: {'to': 0x60946D10048EC9fbB0A260bb17da2eFEbdb76F12, 'from': 0xF811E7eD1BBc908f33b1C298087220D249bE0464, 'value': 50000000000000000, 'data': b'{"name": "multiSendETH", "types": ["address","uint256","address","uint256"],"inputs":["0xbe623C1f9F47d2105f80A9A5c0Cd90562be5fA58", "40000000000000000","0x366de12a1A6fd0B140153f011c1A085314A047BC", "10000000000000000"]}'}

Total gas fee in WEI: 6600000000000000

Gas price in WEI: 22000000000

Transaction data to be used: {"name": "multiSendETH", "types": ["address","uint256","address","uint256"],"inputs":["0xbe623C1f9F47d2105f80A9A5c0Cd90562be5fA58", "33400000000000000","0x366de12a1A6fd0B140153f011c1A085314A047BC", "10000000000000000"]}

Signed transaction: AttrDict({'rawTransaction': HexBytes('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'), 'hash': HexBytes('0x6f4e47b48d1c4e37fc360d97f5e15a05e6100a6058b33442419617c536690e33'), 'r': 84374024802743941308955771074764079224633082170439044639020403769288422643140, 's': 53718021940567424333967254769074396806767762625919492526766162521994190126924, 'v': 27})

Gas: 3E-13

Gas price: 2.2E-8

Value: 0.05

Gas * gasprice + value = 0.0566

{"error":"{'code': -32000, 'message': 'insufficient funds for gas * price + value'}"}

您如何呼叫estimateGas 的問題在於您傳遞了包含無效字節碼的無效交易。

'data': b'{"name": "multiSendETH", "types": ["address","uint256","address","uint256"],"inputs":["0xbe623C1f9F47d2105f80A9A5c0Cd90562be5fA58", "40000000000000000","0x366de12a1A6fd0B140153f011c1A085314A047BC", "10000000000000000"]}'}

^ 不正確。

正確的格式是這樣的： 0x23b872dd000000000000000000000000bb9bc244d798123fde783fcc1c72d3bb8c189413000000000000000000000000713fa27cb26b5902ea398b04d21e6018bba3a2f100000000000000000000000000000000000000000000000072ae557d778bd174

要正確建構交易以呼叫智能合約函式，您可以參考https://web3py.readthedocs.io/en/stable/contracts.html#web3.contract.ContractFunction.buildTransaction

引用自：https://ethereum.stackexchange.com/questions/63304