config/contracts.js

contracts.js

// config/contracts.js
module.exports = {
  "testnet": {
    "deployment": {
      "accounts": [
        {
          "privateKey": "your_private_key"
        },
        {
          "privateKeyFile": "path/to/file" // You can put more than one key, separated by , or ;
        },
        {
          "mnemonic": "12 word mnemonic",
          "addressIndex": "0", // Optional. The index to start getting the address
          "numAddresses": "1", // Optional. The number of addresses to get
          "hdpath": "m/44'/60'/0'/0/" // Optional. HD derivation path
        }
      ]
    }
  }
}