getTransactionCount fails with a block identifier using web3[tester]

[Pet3ris]

• Version: 5.13.0
• Python: 3.7
• OS: osx

What was wrong?

import web3
import eth_tester

backend = eth_tester.PyEVMBackend()
w3 = web3.Web3(web3.Web3.EthereumTesterProvider(backend))

w3.eth.getTransactionCount(w3.eth.accounts[0], 0)

This code fails when it should succeed. It seems that web3.py automatically formats block references to hex numbers but eth-tester get_nonce expects it to be a number.

How can it be fixed?

This could possibly be an eth-tester issue but I've added it here for coverage.

[Pet3ris]

Two possible fixes:

One would be to accept hexadecimal block numbers on the eth-tester side https://github.com/ethereum/eth-tester/blob/171dce6074d6ee1b7dd6d97dbd0df397259d421d/eth_tester/main.py#L242.

Another would be to fix the formatting for get_nonce rpc calls on the web3.py side.

[kclowes]

Thanks for the report @Pet3ris! I want to double check, but I think we'll want to fix this on the eth-tester side.