Is there a way to know the contract creation Address from a the transaction?

Question

I know that in the transaction receipt I can get the contract address by getting a transaction receipt from a generated transaction.

But I am wondering since smart contract addresses are deterministic in some sense if there is a way to predict the address from the transaction its self, not the receipt.

Answer 1

Ok, I actually found the answer my self sadly things are not updated in the documentation at least so far, however, there is a creates field in every transaction.

So when you, for example, do getBlock and get all blocks including transactions you can find if it was a contract creation transaction first by checking if to is zero which is mentioned in the documentation and creates as the address.

Answer 2

@Nulik has the answer that is the clearest.

The only caveat is the actual command is eth.getTransactionReceipt(hash).contractAddress

If you are using Web3, use web3.eth.getTransactionReceipt(hash).contractAddress.

(Info on how to use Web3 in Python)

Answer 3

You can actually get the contract address before a transaction is generated. A contract's address is determined by the address and nonce of the contract creator.

From the source code:

func CreateAddress(b common.Address, nonce uint64) common.Address {
    data, _ := rlp.EncodeToBytes([]interface{}{b, nonce})
    return common.BytesToAddress(Keccak256(data)[12:])
}