遷移到 Ropsten 網路時出現問題

我正在嘗試將契約遷移到 ROPSTEN 網路。它失敗的原因如下。請指教。

遷移命令

$env:MNEMONIC=' XX XX XX';truffle migrate --reset --network ropsten 

錯誤

Error: There was a timeout while attempting to connect to the network at undefined.
  Check to see that your provider is valid.
  If you have a slow internet connection, try configuring a longer timeout in your Truffle config. Use the networks[networkName].networkCheckTimeout property to do this.
at Timeout._onTimeout (C:\Users\skmsu\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\provider\index.js:57:1)
at listOnTimeout (internal/timers.js:557:17)
at processTimers (internal/timers.js:500:7) 

松露-config.js

require('dotenv').config();
const HDWalletProvider = require('truffle-hdwallet-provider'); 

console.log('ab - from powershell file process.env.MNEMONIC : '+     
process.env.MNEMONIC);

const infuraProvider = network => providerWithMnemonic( 
process.env.MNEMONIC || '',
`https://${network}.infura.io/${process.env.INFURA_API_KEY}`
);
const providerWithMnemonic = (mnemonic, rpcEndpoint) =>
new HDWalletProvider(mnemonic, rpcEndpoint);

module.exports = {

 // See <http://truffleframework.com/docs/advanced/configuration>
 // to customize your Truffle configuration!

 networks: {

development: {
 host: 'localhost',
 port: 8545,
 network_id: '*', // eslint-disable-line camelcase
} , 

mainnet: {
 provider: infuraProvider('mainnet'), 
 gasPrice: 10000000000,  // 10 Gwei
 gas: 4000000,
 network_id: '1'
}, 
ropsten: { 
 provider: infuraProvider('ropsten'), 
 gasPrice: 1000000000,  // 1 Gwei
 gas: 4000000,
 network_id: '3' 
} 
 },

 solc: {
optimizer: {
 enabled: true,
 runs: 200
}
 } 

};

嘗試使用@truffle/hdwallet-provider. truffle-hdwallet-provider已棄用。

此外，驗證您的 Ropsten 項目 ENDPOINT。 i.e: https://ropsten.infura.io/v3/j4hg5g45jhfj8hgfhfghgtg

讓我知道這是否適合您，如果沒有，那麼會找到其他方法。

1. 我假設你已經成功安裝了@truffle/hdwallet-provider。如果你不這樣做，試試這個

$ npm install @truffle/hdwallet-provider

或查看https://github.com/trufflesuite/truffle/blob/develop/packages/hdwallet-provider/README.md#install

2. 把你的 Infura API KEY.infura和助記符放到.secret. 兩者處於同一水平truffle-config.js。
3. 改成truffle-config.js這樣

const HDWalletProvider = require('@truffle/hdwallet-provider');

const fs = require('fs');
const infuraKey = fs.readFileSync(".infura").toString().trim();
const mnemonic = fs.readFileSync(".secret").toString().trim();

module.exports = {
 networks: {
   development: {
    host: "127.0.0.1",     // Localhost (default: none)
    port: 8545,            // Standard Ethereum port (default: none)
    network_id: "*",       // Any network (default: none)
   },
   ropsten: {
     provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/` + infuraKey),
     network_id: 3,       // Ropsten's id
     gas: 5500000,        // Ropsten has a lower block limit than mainnet
     confirmations: 2,    // # of confs to wait between deployments. (default: 0)
     timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
     skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
   },
 },

 // Set default mocha options here, use special reporters etc.
 mocha: {
   // timeout: 100000
 },

 // Configure your compilers
 compilers: {
   solc: {
     // version: "0.8.0",    // Fetch exact version from solc-bin (default: truffle's version)
     settings: {          // See the solidity docs for advice about optimization and evmVersion
      optimizer: {
        enabled: false,
        runs: 200
      },
     }
   }
 },
 db: {
   enabled: false
 }
};

4. 然後你可以這樣執行

$ truffle migrate --network ropsten

5. 請記住，不要.infura將and送出.secret到 GitHub 或任何 repo。

引用自：https://ethereum.stackexchange.com/questions/109738