Lesson 6: Contract not found on mainnet-fork-dev

[carlitox477]

I create my alchemy project as Patrick said:

• Enviroment: Deployment
• Chain: Ethereum
• Network: Mainnet

And i get the API key, which has the next structure: https://eth-mainnet.alchemyapi.io/v2/API-KEY

My brownie-config.yaml file is:

dependencies:
  #- <organization/repo>@version
  - smartcontractkit/[email protected]
compiler:
  solc:
    remappings:
      - '@chainlink=smartcontractkit/[email protected]'
dotenv: .env
networks:
  kovan:
    eth_usd_price_feed: '0x9326BFA02ADD2366b30bacB125260Af641031331'
    verify: True
  mainnet-fork:
    eth_usd_price_feed: '0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419'
    verify: False
  mainnet-fork-dev:
    eth_usd_price_feed: '0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419'
    verify: False
  development:
    verify: False
  ganache-testnet-dev:
    verify: False
wallets:
  from_key: ${PRIVATE_KEY}

I added the mainnet-fork-dev with the line brownie networks add development mainnet-fork-dev cmd=ganache-cli host=http://127.0.0.1 fork=https://eth-mainnet.alchemyapi.io/v2/API-KEY accounts=10 mnemonic=brownie port=8546

However, when I run the deploy.py file with the line brownie run scripts/deploy.py --network mainnet-fork-dev it throws the next:

INFORMACIÓN: no se pudo encontrar ningún archivo para los patrones dados.
Brownie v1.16.4 - Python development framework for Ethereum

FundMeBrownieProject is the active project.

Launching 'ganache-cli.cmd --accounts 10 --fork https://eth-mainnet.alchemyapi.io/v2/API-KEY --mnemonic brownie --port 8546 --hardfork istanbul'...

Running 'scripts\deploy.py::main'...
Current network: mainnet-fork-dev
0x66aB6D9362d4F35596279692F0251Db635165871 is deploying a FundMe 
contract
  File "C:\Users\carma\AppData\Local\Programs\Python\Python310\lib\site-packages\brownie\_cli\run.py", line 49, in main
    return_value, frame = run(
  File "C:\Users\carma\AppData\Local\Programs\Python\Python310\lib\site-packages\brownie\project\scripts.py", line 103, in run    
    return_value = f_locals[method_name](*args, **kwargs)        
  File ".\scripts\deploy.py", line 28, in main
    deploy_fund_me()
  File ".\scripts\deploy.py", line 19, in deploy_fund_me
    fund_me=FundMe.deploy(
  File "C:\Users\carma\AppData\Local\Programs\Python\Python310\lib\site-packages\brownie\network\contract.py", line 600, in __call__
    return tx["from"].deploy(
  File "C:\Users\carma\AppData\Local\Programs\Python\Python310\lib\site-packages\brownie\network\account.py", line 507, in deploy 
    data = contract.deploy.encode_input(*args)
  File "C:\Users\carma\AppData\Local\Programs\Python\Python310\lib\site-packages\brownie\network\contract.py", line 629, in encode_input
    data = format_input(self.abi, args)
  File "C:\Users\carma\AppData\Local\Programs\Python\Python310\lib\site-packages\brownie\convert\normalize.py", line 20, in format_input
    raise type(e)(f"{abi['name']} {e}") from None
ValueError: constructor '('0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419',)' - '('0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419',)' is not a valid ETH address
Terminating local RPC client...

The contract 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419 exists in the mainnet. What am I doing wrong?

[cromewar]

Hello @carlitox477 for me it seems you have something missing with your constructor which is not taking the correct imput, may be is using this address 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419 is it was the account address rather than the price_feed. Remember you must use positional arguments on Python so the position on the deploy matters a lot. I have some recomendations for you.

1. check if your constructor is correct on the contract.

    constructor(address _priceFeed) public {
        priceFeed = AggregatorV3Interface(_priceFeed);
        owner = msg.sender;
    }

2. Check if your deploy scripts is correct, remember the position of this two elements price_feed_address, {"from": account} on the deploy.

def deploy_fund_me():
    account = get_account()
    if network.show_active() not in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
        price_feed_address = config["networks"][network.show_active()][
            "eth_usd_price_feed"
        ]
    else:
        deploy_mocks()
        price_feed_address = MockV3Aggregator[-1].address

    fund_me = FundMe.deploy(
        price_feed_address,
        {"from": account},
        publish_source=config["networks"][network.show_active()].get("verify"),
    )
    print(f"Contract deployed to {fund_me.address}")
    return fund_me

3. Don't forget to add the network to your helpful scripts (and import it on the deploy script)

FORKED_LOCAL_ENVIRONMENTS = ["mainnet-fork", "mainnet-fork-dev"]
LOCAL_BLOCKCHAIN_ENVIRONMENTS = ["development", "ganache-local"]

Finally make sure your alchemy project is on development.

[carlitox477]

Thanks for taking the time to read my problem and answer, but I solved it. If you wan't to laught read the answer below XD

[cromewar]

Hahah sometimes we struggle with this kind of errors for hours, I'm glad you solved it haha.

[carlitox477]

I found the answer to my problem after spending 4 hours looking the bug: I'm dumb XD

It was a sintax error. Instead of price_feed_address=config["networks"][network.show_active()]["eth_usd_price_feed"] I put price_feed_address=config["networks"][network.show_active()]["eth_usd_price_feed"],. If you don't see the problem like me, here a hint: look for the comma (,) .

So, that's why price_feed_address was interpreted as a tuple and that's why I got the error:

ValueError: constructor '('0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419',)' - '('0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419',)' is not a valid ETH address

[cromewar]

Jum I never would have seen that comma, I'm glad you solved it.

[GitGAMERGLOVES]

So mine wouldn't work with the (,) but when removing it - worked!

[IamSiddharthChoudhary]

I had the same error but a different syntax issue, and spent 2 days trying out different things. But with this post I fortunately solved the error, So a big thanks from my side.

[Mobey-eth]

IamSiddharthChoudhary what was your syntax issiue please