if you don't install smartcontractkit/chainlink-brownie-contracts

[vincentyao]

If you don't install smartcontractkit/chainlink-brownie-contracts, you can refer to this code that i have tested in my local, it is worked for me.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import {AggregatorV2V3Interface} from "@chainlink/contracts/src/v0.8/shared/interfaces/AggregatorV2V3Interface.sol";

/**

• @title MockV3Aggregator
• @notice Based on the FluxAggregator contract
• @notice Use this contract when you need to test
• other contract's ability to read data from an
• aggregator contract, but how the aggregator got
• its answer is unimportant
  */
  // solhint-disable
  contract MockV3Aggregator is AggregatorV2V3Interface {
  uint256 public constant override version = 4;

uint8 public override decimals;
int256 public override latestAnswer;
uint256 public override latestTimestamp;
uint256 public override latestRound;

mapping(uint256 => int256) public override getAnswer;
mapping(uint256 => uint256) public override getTimestamp;
mapping(uint256 => uint256) private getStartedAt;

constructor(uint8 _decimals, int256 _initialAnswer) {
decimals = _decimals;
updateAnswer(_initialAnswer);
}

function updateAnswer(int256 _answer) public {
latestAnswer = _answer;
latestTimestamp = block.timestamp;
latestRound++;
getAnswer[latestRound] = _answer;
getTimestamp[latestRound] = block.timestamp;
getStartedAt[latestRound] = block.timestamp;
}

function updateRoundData(uint80 _roundId, int256 _answer, uint256 _timestamp, uint256 _startedAt) public {
latestRound = _roundId;
latestAnswer = _answer;
latestTimestamp = _timestamp;
getAnswer[latestRound] = _answer;
getTimestamp[latestRound] = _timestamp;
getStartedAt[latestRound] = _startedAt;
}

function getRoundData(
uint80 _roundId
)
external
view
override
returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)
{
return (_roundId, getAnswer[_roundId], getStartedAt[_roundId], getTimestamp[_roundId], _roundId);
}

function latestRoundData()
external
view
override
returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)
{
return (
uint80(latestRound),
getAnswer[latestRound],
getStartedAt[latestRound],
getTimestamp[latestRound],
uint80(latestRound)
);
}

function description() external pure override returns (string memory) {
return "v0.8/shared/mocks/MockV3Aggregator.sol";
}
}

Because if you installed a real contract, it isn't smartcontractkit/chainlink-brownie-contracts;
It is smartcontractkit/chainlink/tree/develop/contracts.
The video in Patric‘s made the mock function; maybe there is a difference.
If you have any questions, feel free to leave a comment here and let me know
Best regards,

[EngrPips]

I am not sure I understand what you mean @vincentyao, Do you mean chainlink-brownie-contracts does not have the MockV3Aggregator contract anymore?

[Shivasaiyadav08]

yes i think i was unable to found

[EngrPips]

yes i think i was unable to found

Did you search with cmd + p[Mac] or ctrl + p[Windows]? It should exist, maybe they change the path where it exists.

[vincentyao]

No, what I want to say is that maybe some people didn't install “chainlink-brownie-contracts” at the very beginning.  Then they might encounter confusion and problems when updating the “MockV3Aggregator”according to the video.  Like me for example. And then I did some debugging and made a sharing on how to find the corresponding “MockV3Aggregator” and update the relevant code if what is installed is the chain-link-contracts I mentioned. I hope it can be helpful if anyone encounters the same situation.  Thank you for your attention.   Best regards,

…

---Original--- From: ***@***.***> Date: Tue, Apr 15, 2025 01:08 AM To: ***@***.***>; Cc: ***@***.******@***.***>; Subject: Re: [Cyfrin/foundry-full-course-cu] if you don't installsmartcontractkit/chainlink-brownie-contracts (Discussion #3886) I am not sure I understand what you mean @vincentyao, Do you mean chainlink-brownie-contracts does not have the MockV3Aggregator contract anymore? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>

[EngrPips]

I see, Thanks for the heads-up.

[vincentyao]

No mentioned, sir Thanks for your reply. 

…

---Original--- From: ***@***.***> Date: Tue, Apr 15, 2025 04:31 AM To: ***@***.***>; Cc: ***@***.******@***.***>; Subject: Re: [Cyfrin/foundry-full-course-cu] if you don't installsmartcontractkit/chainlink-brownie-contracts (Discussion #3886) I see, Thanks for the heads-up. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>