Truffle migrate to rinkeby fails with insufficient gas price

Question

I'm trying to migrate my contracts to rinkeby using truffle (truffle migrate --network rinkeby), but it keeps telling me that I don't have enough funds:

Using network 'rinkeby'.

Running migration: 1_initial_migration.js Deploying Migrations...
... undefined Error encountered, bailing. Network state unknown. Review successful transactions manually. Error: insufficient funds for gas * price + value

Here's my truffle.js:

module.exports = {
  networks: {
    rinkeby: {
      network_id: 4,
      host: '10.21.0.94',
      port: 8545,
      gas: 4000,
      gasPrice: 200000,
      from:  "0x852c1e19114b1ff775c59a61b345cc839f3307fd"
    }
  }
};

The "from" address has 3ETH, this should be more than enough.

UPDATE: I tried to switch to a local light node running geth --networkid=4 --syncmode=light --datadir . --rpc --rpcapi="eth,web3,personal,net" (on Windows), but still get either insufficient funds or exceeds block gas limit error.

Answer 1

You can determine the current GasLimit for Rinkeby by visiting Rinkeby Blocks and look into the GasLimit Column. In Truffle, your gas should below this value.

With the GasPrice, you can control how quickly a Miner will take your transaktion. The higher the value, the faster your transaction is included in a Block.

For me, these values are a good fit:

"gas":      6500000,
"gasPrice": 100000000000

Answer 2

I assumed that my account has funds that were sent to it. However, it turned out the node hasn't synced to the block that has that transaction, so it still thinks that the account has zero funds.

Moral: even if you're sure you got funds, always check it with the node you're working with. Also, the new "dry run" option in Truffle helps (this is how I discovered that I have zero ether).