I get these version import errors when I tried to execute "brownie run scripts/deploy_lottery.py" I'm learning blockchain with the help of freecodecamp.org's youtube video.

it's working fine with the older version.

pragma solidity ^0.4.11;
import "@chainlink/contracts/src/v0.4/ERC677Token.sol";
import {StandardToken as linkStandardToken} from 

but I'm using this new version,

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;

import "@chainlink/contracts/src/v0.8/ERC677Token.sol";
import {StandardToken as linkStandardToken} from 

contract LinkToken is linkStandardToken, ERC677Token {
    uint256 public constant totalSupply = 10**27;
    string public constant name = "ChainLink Token";
    uint8 public constant decimals = 18;
    string public constant symbol = "LINK";

    function LinkToken() public {
        balances[msg.sender] = totalSupply;

This is the error I'm getting on my terminal....--> brownie run scripts/deploy_lottery.py Brownie v1.16.4 - Python development framework for Ethereum

New compatible solc version available: 0.8.11
Compiling contracts...
  Solc version: 0.8.11
  Optimizer: Enabled  Runs: 200
  EVM Version: Istanbul
CompilerError: solc returned the following errors:

ParserError: Source"/Users/mohameduzair/.brownie/packages/smartcontractkit/chainlink-       [email protected]/contracts/src/v0.8/ERC677Token.sol" not found: File not found.
 --> contracts/test/LinkToken.sol:4:1:
4 | import "@chainlink/contracts/src/v0.8/ERC677Token.sol";
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ParserError: Source"/Users/mohameduzair/.brownie/packages/smartcontractkit/[email protected]/contracts/src/v0.8/vendor/StandardToken.sol" not found: File not found.
 --> contracts/test/LinkToken.sol:5:1:
5 | import {StandardToken as linkStandardToken} from "@chainlink/contracts/src/v0.8/vendor/StandardToken.sol"; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

So, how can I fix this issue, please? these are the images... this is the LinkToken.sol file and errors this is the brownie-config.yaml file

1 Answer 1


LinkToken is available for v0.4 only. Change directory address to @chainlink/contracts/src/v0.4/LinkToken

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