Ethereum 通过脚本在本地机器上使用相同的钱包密钥在以太坊上向智能合约交易数据

我计划接受不了解“公钥/私钥和以太坊”的人提供的数据，我希望将这些数据处理到我已经部署在以太坊区块链上的智能合约中

我不能使用web3，因为用户没有任何以太坊钱包。这个条件是我的要求

我如何将数据放在合同上： 示例场景：带有get（）和set（）的迎宾协定

我只想在每次将某些数据发布到我的服务器时自动运行一个脚本，以便将这些数据处理到set（）中的迎宾协定。始终使用相同的公钥/私钥对

任何建议或虚拟脚本都会有所帮助。

给你：

const express = require("express");
const ethers = require("ethers");
const fs = require("fs");
const app = express();
const port = 3000;

// The contract ABI
let abi = [
    {
        constant: true,
        inputs: [],
        name: "get",
        outputs: [{ internalType: "uint256", name: "", type: "uint256" }],
        payable: false,
        stateMutability: "view",
        type: "function"
    },
    {
        constant: false,
        inputs: [{ internalType: "uint256", name: "x", type: "uint256" }],
        name: "set",
        outputs: [],
        payable: false,
        stateMutability: "nonpayable",
        type: "function"
    }
];

// Connect to contract
// https://goerli.etherscan.io/address/0x00530Aae5fDFa2C4cFe21Df5Fbe1B2213fe8f551#code
let provider = ethers.getDefaultProvider("goerli");
let contractAddress = "0x00530Aae5fDFa2C4cFe21Df5Fbe1B2213fe8f551";
let contract = new ethers.Contract(contractAddress, abi, provider);

app.get("/:message", async (req, res) => {
    try {
        userInput = req.params.message;
        console.log("User input:", userInput); // if it prints 'favicon.ico', that's normal
        userNumber = parseInt(userInput);

        // Make sure user input is a number
        if (isNaN(userNumber)) {
            return res.send("Please only send number").end();
        }

        // Do not store private key in code
        let privateKey = fs
            .readFileSync("private-key.txt")
            .toString()
            .trim();
        let wallet = new ethers.Wallet(privateKey, provider);
        let contractWithSigner = contract.connect(wallet);
        let tx = await contractWithSigner.set(userNumber);

        res.send(
            `Tx with number '${userNumber}' has been sent to contract.\nHash: ${tx.hash}.`
        );

        // When the tx has been mined, you can verify it here:
        // https://goerli.etherscan.io/address/0x00530aae5fdfa2c4cfe21df5fbe1b2213fe8f551#readContract
    } catch (error) {
        return next(error);
    }
});

app.listen(port, () => console.log(`App is listening on port ${port}!`));

有关完整的源代码，请参阅。合同可以找到