While deploying, brownie is trying to access a key value that doesn't exists.

[legit-programmer]

Environment information

• brownie Version: 1.19.3
• ganache-cli Version: 6.12.2
• solc Version: ^0.6.0
• Python Version: 3.10.7
• OS: win

What was wrong?

• I ran the command brownie run scripts/deployFundMe.py

from brownie import accounts, FundMe, MockV3Aggregator, network, config
from.helpful_scripts import get_account 

def deploy():
    print(f'Active network is {network.show_active()}')
    if network.show_active()!='development':
        priceFeedAddress = config['networks'][network.show_active()]['priceFeed']
    else:
        print('Deploying Mocks...')
        aggregator = MockV3Aggregator.deploy(18, 2000000000000000, {'from':get_account()})
        print('Mocks deployed')
        priceFeedAddress = aggregator.address

    account = get_account()
    FundMe.deploy(priceFeedAddress, {'from':account}, publish_source=True)
    
def main():
    network.priority_fee('1.5 gwei')
    deploy() 

Error:

Brownie v1.19.3 - Python development framework for Ethereum

BrownieProject is the active project.

Launching 'ganache-cli.cmd --accounts 10 --hardfork istanbul --gasLimit 12000000 --mnemonic brownie --port 8545'...

Running 'scripts\deployFundMe.py::main'...
Active network is development
Deploying Mocks...
  File "C:\Users\Siddique, line line, in in
    return_value, frame = run(
  File "C:\Users\Siddique, line line, in in
    return_value = f_locals[method_name](*args, **kwargs)
  File ".\scripts\deployFundMe.py", line 19, in main
    deploy()
  File ".\scripts\deployFundMe.py", line 10, in deploy
    aggregator = MockV3Aggregator.deploy(18, 2000000000000000, {'from':get_account()})     
  File "C:\Users\Siddique, line line, in in
    return tx["from"].deploy(
  File "C:\Users\Siddique, line line, in in
    receipt, exc = self._make_transaction(
  File "C:\Users\Siddique, line line, in in
    tx = _apply_fee_to_tx(tx, gas_price, max_fee, priority_fee)
  File "C:\Users\Siddique, line line, in in
    base_fee = Chain().base_fee
  File "C:\Users\Siddique, line line, in in
    return Wei(block.baseFeePerGas)
AttributeError: 'AttributeDict' object has no attribute 'baseFeePerGas'
Terminating local RPC client...

getBlock function of web3.py does not have any attribute baseFeePerGas
see docs

[legit-programmer]

Note:- The mocks are deployed once you start the local chain through ganache-GUI and NOT with ganache-cli. Assuming that the GUI defines some kind of base fee for transactions which cli do not.