Cannot Read script on ganache development network

[nickbeaird]

I am seeing that my local testing with ganche-cli is causing some issues connecting to the same network.

Repro steps:

1. Set the default network in the yanl file to ganache.
2. Install ganache-cli via npm. Start ganache-cli in one terminal tab.
3. Open a new terminal tab and add a ganache network. brownie networks add Ethereum ganache host=http://localhost:8545 chainid=1337.
4. Run the deploy script locally with brownie run scripts/price_feed_scripts/01_deploy_price_consumer_v3.py. Here I was having an issue

$ brownie run scripts/price_feed_scripts/01_deploy_price_consumer_v3.py

Brownie v1.15.1 - Python development framework for Ethereum

ChainlinkMixProject is the active project. File "brownie/_cli/main.py", line 64, in main importlib.import_module(f"brownie._cli.{cmd}").main() File "brownie/_cli/run.py", line 43, in main network.connect(CONFIG.argv["network"]) File "brownie/network/main.py", line 55, in connect p._load_deployments() File "brownie/project/main.py", line 357, in _load_deployments contract = ProjectContract(self, build, build_json.stem) File "brownie/network/contract.py", line 1291, in init _DeployedContractBase.init(self, address, owner, tx) File "brownie/network/contract.py", line 757, in init raise ContractNotFound(f"No contract deployed at {address}") ContractNotFound: No contract deployed at 0xB47a7bDF2C0B546AE73C4352c70BC68B0d479048

5. I was able to get this to work by running brownie run scripts/price_feed_scripts/01_deploy_price_consumer_v3.py --network development.
6. I then tried to run the read script and I was not able to brownie run scripts/price_feed_scripts/02_read_price_feed.py

$ brownie run scripts/price_feed_scripts/02_read_price_feed.py

Brownie v1.15.1 - Python development framework for Ethereum

ChainlinkMixProject is the active project. File "brownie/_cli/main.py", line 64, in main importlib.import_module(f"brownie._cli.{cmd}").main() File "brownie/_cli/run.py", line 43, in main network.connect(CONFIG.argv["network"]) File "brownie/network/main.py", line 55, in connect p._load_deployments() File "brownie/project/main.py", line 357, in _load_deployments contract = ProjectContract(self, build, build_json.stem) File "brownie/network/contract.py", line 1291, in init _DeployedContractBase.init(self, address, owner, tx) File "brownie/network/contract.py", line 757, in init raise ContractNotFound(f"No contract deployed at {address}") ContractNotFound: No contract deployed at 0xB47a7bDF2C0B546AE73C4352c70BC68B0d479048

7. I retried with the network setting and it did not work due to list index out of range in Python and a BrownieEnvironmentWarning of block height.

$ brownie run scripts/price_feed_scripts/02_read_price_feed.py --network development

Brownie v1.15.1 - Python development framework for Ethereum

ChainlinkMixProject is the active project. /Users/nicklasb/.local/pipx/venvs/eth-brownie/lib/python3.9/site-packages/brownie/network/main.py:44: BrownieEnvironmentWarning: Development network has a block height of 30 warnings.warn( Attached to local RPC client listening at '127.0.0.1:8545'...

Running 'scripts/price_feed_scripts/02_read_price_feed.py::main'... File "brownie/_cli/run.py", line 49, in main return_value, frame = run( File "brownie/project/scripts.py", line 103, in run return_value = f_locals[method_name](*args, **kwargs) File "./scripts/price_feed_scripts/02_read_price_feed.py", line 6, in main price_feed_contract = PriceFeedConsumer[-1] File "brownie/network/contract.py", line 160, in getitem return self._contracts[i] IndexError: list index out of range

[PatrickAlphaC]

Thanks for making this! Yes... I'll have to make some updates to this mix to better handle self-run ganache chains...

[AdiF1]

Hi Patrick. I was having the same problems as Nick. I randomly trashed the build folder and all was good again. It seems to be a repeatable 'fix' too. I have no idea why, or if that helps. Just thought I'd speak up!

Cheers

[itsencrypted]

Hi Patrick I'm having an issue with the .env file as well. It's not being able to read my: WEB3_INFURA_PROJECT_ID as well.

[pappas999]

thanks for raising @itsencrypted . Can you create a StackOverflow post, posting all the relevant details and steps you took after cloning the repo? https://stackoverflow.com/questions/ask?tags=chainlink

[ANG3L0]

I think this might not be strictly a ganache situation. I ran into this with rinkeby as well and trashing build/ and redoing brownie compile lets me run a test successfully (per @AdiF1 solution). I guess just like work, sometimes you just have to trash your build dir and things magically work again when you recompile.

[PatrickAlphaC]

Hmm... Usually when stuff "magically" starts working in software that's when I start to sweat ahah.

If anyone would like to investigate that would be greatly appreciated!