Common migration pitfalls

A common mistake is to have a misconfigured truffle.js file. Ensure that for each network you plan to deploy to, there should be a corresponding entry in the networks object, stating the following information:

networks: {
  network_name: {
    network_id: <number>
    host: <string>,
    port: <number>,
    gas: <number>
  }
}

How do we know what is the correct gas limit? Well, you have to play with this a little.

Every transaction you make has a gas cost. A migration is a transaction, too, and thus has a gas cost. When attemmpting to migrate your contract, you may run into this error:

exceeds block gas limit

Every transaction you send has a gas limit. Try to decrease the amount of gas specified.

Another error you may encounter is the following:

insufficient funds for gas * price + value

This means the total cost of the transaction exceeds your account's balance. So, you need to add more ether to your account.

You may see the following error when...