Lesson 12: KeyError: 'OpenZeppelin/[email protected]/Address'

[ChristianG77]

Hi,

When running the final script, brownie run scripts/deploy_and_upgrade.py --network rinkeby, I'm receiving an error message inidcating, "KeyError: 'OpenZeppelin/[email protected]/Address'" . I'm using version 4.3.2, so not sure why it's referencing 4.1.0.

ProxyAdmin.sol is reporting a problem of, "Source "@openzeppelin/contracts/access/Ownable.sol" not found: File import callback not supported" and TransparentUpgradeableProxy.sol is reporting a problem of, "Source "@openzeppelin/contracts/porxy/ERC1967/ERC1967Proxy.sol" not found: File import callback not supported".

My brownie-config.yaml and solidity codes look aligned with the file paths.

Any help would be greatly appreciated.

brownie-config

dependencies:

• OpenZeppelin/[email protected]
  compiler:
  solc:
  remappings:
  • '@OpenZeppelin=OpenZeppelin/[email protected]'

Solidity Code

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (proxy/transparent/ProxyAdmin.sol)

pragma solidity ^0.8.0;

import "./TransparentUpgradeableProxy.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (proxy/transparent/TransparentUpgradeableProxy.sol)

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";

Full Error Message

PS C:\Users\chris\Dropbox\00_CODE\upgrades> brownie run scripts/deploy_and_upgrade.py --network rinkeby
INFO: Could not find files for the given pattern(s).
Brownie v1.16.4 - Python development framework for Ethereum

UpgradesProject is the active project.

Running 'scripts\deploy_and_upgrade.py::main'...
Depolying to rinkeby
Transaction sent: 0xc4ca013964f72519fcb91da0896e1dde4829db8cdb868955b140a4e389e34cbc
Gas price: 1.499999998 gwei Gas limit: 113404 Nonce: 70
Box.constructor confirmed Block: 9524406 Gas used: 103095 (90.91%)
Box deployed at: 0x8589bCCCaAEF96889956742EF48DA0eFe38b4506

Waiting for https://api-rinkeby.etherscan.io/api to process contract...
Verification submitted successfully. Waiting for result...
Verification pending...
Verification complete. Result: Pass - Verified
Transaction sent: 0xf659c18da5124f77a041c042fa2eb54b49031dbaf6b7855df5d650b0b5f79dfb
Gas price: 1.499999998 gwei Gas limit: 534673 Nonce: 71
ProxyAdmin.constructor confirmed Block: 9524409 Gas used: 486067 (90.91%)
ProxyAdmin deployed at: 0xD6F1e065B8aB32f87579FBC164FBdddF48c5f0a8

Waiting for https://api-rinkeby.etherscan.io/api to process contract...
Verification submitted successfully. Waiting for result...
Verification pending...
Verification complete. Result: Fail - Unable to verify
Transaction sent: 0x5ca078336459ec1863e99290650cef2223f9c26f532aa5fad9afaafdeb6c3ee6
Gas price: 1.499999998 gwei Gas limit: 1000000 Nonce: 72
TransparentUpgradeableProxy.constructor confirmed Block: 9524413 Gas used: 587516 (58.75%)
TransparentUpgradeableProxy deployed at: 0x0D5e5e44C686c9a89B7639183DDBf1ADB899d377

File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie_cli\run.py", line 49, in main
return_value, frame = run(
File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\project\scripts.py", line 103, in run
return_value = f_locals[method_name](*args, **kwargs)
File ".\scripts\deploy_and_upgrade.py", line 22, in main
proxy = TransparentUpgradeableProxy.deploy(
File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\contract.py", line 600, in call
return tx["from"].deploy(
File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\account.py", line 555, in deploy
contract.publish_source(deployed_contract, silent=silent)
File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\contract.py", line 410, in publish_source
contract_info = self.get_verification_info()
File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\contract.py", line 315, in get_verification_info
build_json = self._project._build.get(name)
File "C:\Users\chris.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\project\build.py", line 124, in get
return self._interfaces[key]
KeyError: 'OpenZeppelin/[email protected]/Address'

[cromewar]

You have a Typo on your import:
"@openzeppelin/contracts/porxy/ERC1967/ERC1967Proxy.sol"
change porxy to proxy.

Also on your brownie-config.yaml

OpenZeppelin/[email protected]
compiler:
   solc:
      remappings:
       '@OpenZeppelin=OpenZeppelin/[email protected]

On the remappings section use @openzeppelin= in lowercase.

Hope this info is useful for you, best regards.

[Anu-srinivasan]

Hi ChristianG77
I am also a newbie for coding per se. However, the above error, with the help of a friend , I could get over: I am using windows 10. I have installed python 3.10, visual studio installer for visual lcc dependencies, pip install cython, pip install cytool and thereafter i could install using Patric Collin's instructions on installing web3 for python and eth-brownie. It took a lot of days.

[Anu-srinivasan]

@cromewar
Hi I need help in how to access environ variable for private key and infura ID.
I have set them in user variables in Environmental variables for windows 10. How do I access for deployment?
My contract is working for Ganachie-cli. But when I run for rinkeby network, it gives following error:

Running 'scripts\deploy.py::main'...
File "C:\Users\RBI.local\pipx\venvs\eth-brownie\lib\site-packages\brownie_cli\run.py", line 49, in main
return_value, frame = run(
File "C:\Users\RBI.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\project\scripts.py", line 103, in run
return_value = f_locals[method_name](*args, **kwargs)
File ".\scripts\deploy.py", line 29, in main
deploy_simple_storage()
File ".\scripts\deploy.py", line 8, in deploy_simple_storage
account = get_account()
File ".\scripts\deploy.py", line 26, in get_account
return accounts.add(config["wallets"]["from_key"])
TypeError: 'NoneType' object is not subscriptable

Please let me know. The same error comes when I use .env file in root folder and export both private key and infura ID for rinkeby network and use dotenv: .env in brownie-config.yaml

My system is windows 10

Please help

[cromewar]

Hello @Anu-srinivasan you have two options here:

1. add the dotenv: .env into brownie-config, delete the de build folder and compile again, re-open the project.
2. Use os.getenv() : https://www.geeksforgeeks.org/python-os-getenv-method/

[Willfromtoronto]

I'm experiencing the same issue but I'm on Mac. "KeyError: 'OpenZeppelin/[email protected]/Address'"
I've tried to uninstall brownie-eth but the only version I can install is the 1.16.4 without encountering the cytoolz error. I've tried to install cython and cytoolz on its own but they are already installed.

After following this thread I'm unsure how to pinpoint issue and resolve it.

[cromewar]

@Willfromtoronto there is an article about the cytools error here.
For Mac users you also need to install Xcode