Transaction with hash: '0x407b866ac4f1083f15b6b25537a0938cfb1606a5b245032f82871c85097bb1ec' not found.

[andres15alvarez]

• Version: 5.25.0
• Python: 3.8
• OS: ubutnu 20.02
• pip freeze output

aiohttp==3.8.1
aiosignal==1.2.0
async-timeout==4.0.2
attrs==21.4.0
base58==2.1.1
bitarray==1.2.2
certifi==2021.10.8
charset-normalizer==2.0.10
cytoolz==0.11.2
eth-abi==2.1.1
eth-account==0.5.6
eth-hash==0.3.2
eth-keyfile==0.5.1
eth-keys==0.3.3
eth-rlp==0.2.1
eth-typing==2.2.2
eth-utils==1.10.0
frozenlist==1.2.0
hexbytes==0.2.2
idna==3.3
ipfshttpclient==0.8.0a2
jsonschema==3.2.0
lru-dict==1.1.7
multiaddr==0.0.9
multidict==5.2.0
netaddr==0.8.0
parsimonious==0.8.1
protobuf==3.19.1
pycryptodome==3.12.0
pyrsistent==0.18.0
requests==2.27.1
rlp==2.0.1
six==1.16.0
toolz==0.11.2
urllib3==1.26.7
varint==1.0.2
web3==5.25.0
websockets==9.1
yarl==1.7.2

What was wrong?

The error: Transaction with hash: ''0x407b866ac4f1083f15b6b25537a0938cfb1606a5b245032f82871c85097bb1ec" not found but in etherscan the transaction exists: https://ropsten.etherscan.io/tx/0x407b866ac4f1083f15b6b25537a0938cfb1606a5b245032f82871c85097bb1ec

I'm using Infura as provider with web socket

# Python

import json
from collections import namedtuple
from typing import List

# Web3
from web3.exceptions import ContractLogicError
from web3 import Web3
from web3.datastructures import AttributeDict

# Settings
from .settings import (
    PROJECT_ID,
    ABI,
    ADDRESS
)

w3 = Web3(Web3.WebsocketProvider(f'wss://ropsten.infura.io/ws/v3/{PROJECT_ID}'))
abi = json.loads(ABI)
address = w3.toChecksumAddress(ADDRESS)
contract = w3.eth.contract(address=address, abi=ABI)
Owner = namedtuple('Owner', ['address', 'email'])
Transaction = namedtuple('Transaction', ['address', 'amount'])

def create_project(address: str, private_key: str, goal: int, owner_email: str, project_name: str) -> int:
    try:
        transaction = contract.functions.createProject(goal, owner_email, project_name)\
            .buildTransaction({
                'from': address,
                'nonce': w3.eth.getTransactionCount(address),
                'gasPrice': w3.eth.gas_price
            })
        t_signed = w3.eth.account.sign_transaction(transaction, private_key=private_key)
        t_hash = w3.eth.send_raw_transaction(t_signed.rawTransaction)
        tx_receipt = w3.eth.get_transaction_receipt(t_hash)
        event = contract.events.ProjectCreation().processReceipt(tx_receipt)
    except ContractLogicError as e:
        return
    else:
        return event[0].args.id

`

---

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[LefterisJP]

Infura may be pruning their nodes. If the node is pruned then transactions older than a certain number of blocks may not be found.

[fselmo]

@andres15alvarez, I'm with @LefterisJP on this. For whatever reason Infura was not at the latest block. I can currently get the transaction receipt for that transaction hash so at the moment it is working. I'm going to close this as this isn't an issue with web3.py but feel free to re-open if you feel this is still relevant.

[andres15alvarez]

Perfect, thank very much to you both @fselmo @LefterisJP. I'm going to fix my code to handle this infura's problem.