用於元幣松露盒範例的 Truffle Migrate 失敗

松露遷移

Compiling your contracts...
===========================
> Compiling .\contracts\ConvertLib.sol
> Artifacts written to C:\blockchain_projects\truffle_projects\metacoin\build\contracts
> Compiled successfully using:
  - solc: 0.5.12+commit.7709ece9.Emscripten.clang

> Something went wrong while attempting to connect to the network. Check your network configuration.

Could not connect to your Ethereum client with the following parameters:
   - host       > 127.0.0.1
   - port       > 7545
   - network_id > *
Please check that your Ethereum client:
   - is running
   - is accepting RPC connections (i.e., "--rpc" option is used in geth)
   - is accessible over the network
   - is properly configured in your Truffle configuration file (truffle-config.js)

Truffle v5.1.0 (core: 5.1.0)
Node v10.16.3

已經執行 ganache-cli

我使用的是 ganache-cli，它偵聽埠 8545，解決方案是相應地更新 truffle-config.js 文件：

module.exports = {
 // Uncommenting the defaults below 
 // provides for an easier quick-start with Ganache.
 // You can also follow this format for other networks;
 // see <http://truffleframework.com/docs/advanced/configuration>
 // for more details on how to specify configuration options!
 //
 networks: {
  development: {
    host: "127.0.0.1",
    port: 8545,  
    network_id: "*"
  },

  test: {
    host: "127.0.0.1",
    port: 7545,
    network_id: "*"
  }
 }

};

然後使用 –network 標誌指定要使用的網路：

truffle migrate --network development

首先，您需要在終端中執行ganache-cli 。（如果您沒有 ganache CLI，則首先通過執行此命令npm install -g ganache-cli安裝它）在此命令之後，您將能夠執行truffle migrate。

這會奏效。

引用自：https://ethereum.stackexchange.com/questions/77568