Strange output from truffle migrate --network live --dry-run

Question

I can't get my contract to deploy successfully using Infura, MetaMask, and Truffle.

When I run truffle migrate --network live I get this error:

Error encountered, bailing. Network state unknown. Review successful transactions manually. insufficient funds for gas * price + value

But then, if I run truffle migrate --network live --dry-run I get this output:

sender doesn't have enough funds to send tx. The upfront cost is: 672197500000000000 and the sender's account only has: 60000000000000000

Assuming that value is in wei, why would it cost so much to deploy a contract? What can I do about this?

Here is my truffle.js file:

var HDWalletProvider = require("truffle-hdwallet-provider");

var mnemonic = "my_mnemonic";

module.exports = {
  networks: {
    live: {
      network_id: 1,
      provider: new HDWalletProvider(mnemonic, "https://mainnet.infura.io/my_api_key")    
    }   
  }
};

Answer 1

You can use remix.ethereum.org to test your contract and calculate gas usage. For me it uses 2M gas approx when deploying.

You did not specify the gas limit in your config it will use de default (it was around 6.7M gas). You can try lowering it in your truffle.js.

var HDWalletProvider = require("truffle-hdwallet-provider");

var mnemonic = "my_mnemonic";

module.exports = {
  networks: {
    live: {
      network_id: 1,
      provider: new HDWalletProvider(mnemonic, "https://mainnet.infura.io/my_api_key"),
      gas: "4000000",           // 4M
      gasPrice: "20000000000"   // 20gwei
    }   
  }
};