松露遷移–network ropsten 問題

當我執行時，truffle migrate --network ropsten我看不到契約部署，而只是

Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.

我不知道為什麼，但也刪除./build了我看不到遷移文件的部署，但只有

Compiling your contracts...
===========================
> Compiling ./contracts/A.sol
> Compiling ./contracts/B.sol
> Artifacts written to /Users/........./build/contracts
> Compiled successfully using:
  - solc: 0.5.0+commit.1d4f565a.Emscripten.clang

很多指南顯示這樣的程式碼：

Running migration: 1_initial_migration.js
Deploying Migrations…
… 0xd01dd7...
Migrations: 0xf741...
Saving successful migration to network…
… 0x78ed...
Saving artifacts…
Running migration: 2_deploy_contracts.js
Deploying HelloWorld…
… 0x0aa9...
HelloWorld: [SAVE THIS ADDRESS!!]
Saving successful migration to network…
… 0xee95...
Saving artifacts…

這裡是我的 truffle.js 程式碼：

var HDWalletProvider = require("truffle-hdwallet-provider");
const MNEMONIC = 'my mnemonic words from metamask'

module.exports = {
 // See <http://truffleframework.com/docs/advanced/configuration>
 // for more about customizing your Truffle configuration!
 networks: {
   development: {
     host: "127.0.0.1",
     port: 7545,
     network_id: "*" // Match any network id
   },

   ropsten: {
     provider: function() {
       return new HDWalletProvider(MNEMONIC, "ropsten.infura.io/v3/my-key")
     },
     network_id: 3,
     gas: 4000000      //make sure this gas allocation isn't over 4M, which is the max
   }
 }
};

那麼我該如何解決這個問題呢？

在 ropsten 提供程序下的 truffle.js（或 truffle-config.js）中，嘗試使用**https://**傳遞 Infura API URL 。所以它應該是這樣的：

// Inside truffle.js
 ...

module.exports = {
 networks: {

     ...

   ropsten: {
     provider: function() {
       return new HDWalletProvider(MNEMONIC, "https://ropsten.infura.io/v3/my-key")
     },
     network_id: 3,
     gas: 4000000      //make sure this gas allocation isn't over 4M, which is the max
   }
 }
};

我遇到了同樣的問題，就我而言，問題是我使用了錯誤的 API 密鑰。在您的 Infura 儀表板中，檢查您是否使用了正確的一個，即用於 Ropsten 網路的那個。

正如 jfviray 所說，使用 https 傳遞 Infura API url。

引用自：https://ethereum.stackexchange.com/questions/68817