You may also try installing the wallet handler with the following commaind: #~>npm install truffle-hdwallet-provider

Then on your truffle-confi.json have the following: var mnemonicPhrase = "word1 word2 word3 ....word12"; var HDWalletProvider = require("truffle-hdwallet-provider");

module.exports = { networks: { development: { host: "127.0.0.1", port: 7545, network_id: "*" // Match any network id }, rinkeby: { // must be a thunk, otherwise truffle commands may hang in CI provider: () => new HDWalletProvider(mnemonicPhrase, "https://rinkeyb.infura.io/v3/YOUR-INFURA-PROJECT-KEY"), network_id: '4', } },

compilers: { solc: { version: '0.8.9', optimizer: { enabled: true, runs: 200 } } }, };

then try run with truffle: truffle migrate --network rinkeby

You can also replace the infura "https://rinkeyb.infura.io/v3/YOUR-INFURA-PROJECT-KEY" with Alchemy "https://eth-rinkeby.alchemyapi.io/v2/YOUR-ALCHEMY-JEY"

You may also try installing the wallet handler with the following commaind:

#~>npm install truffle-hdwallet-provider

Then on your truffle-confi.json have the following:

var mnemonicPhrase = "word1 word2 word3 ....word12";
var HDWalletProvider = require("truffle-hdwallet-provider");

module.exports = {
  networks: {
    development: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*" // Match any network id
    },
    rinkeby: {
        // must be a thunk, otherwise truffle commands may hang in CI
      provider: () =>
      new HDWalletProvider(mnemonicPhrase, "https://rinkeyb.infura.io/v3/YOUR-INFURA-PROJECT-KEY"),
      network_id: '4',
    }
  },

  compilers: {
    solc: {
      version: '0.8.9',
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  },
};

then try run with truffle: truffle migrate --network rinkeby

You can also replace the infura "https://rinkeyb.infura.io/v3/YOUR-INFURA-PROJECT-KEY" with Alchemy "https://eth-rinkeby.alchemyapi.io/v2/YOUR-ALCHEMY-JEY"