**Lesson 7**: Compiler version couldn't match though I have configured in hardhat.config.js

[UniqueMaharjan]

MockV3Aggregator.sol code :

//SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "@chainlink/contracts/src/v0.6/tests/MockV3Aggregator.sol"";

hardhat.config.js code :

module.exports = {
  solidity: {
    compilers: [
      {version: "0.8.8"},
      {version: "0.6.6"}
    ],
  },
 }

I have configured solidity compiler versions into hardhat.config.js file but When I compile it still shows version didn't match.

[Nlferu]

Hi @UniqueMaharjan

Just change this version to proper one:

module.exports = {
  solidity: {
    compilers: [
      {version: "0.8.8"},
      {version: "0.6.0"}
    ],
  },
 }

Change "0.6.6" into "0.6.0" as your MockV3 is 0.6.0

If you did that and you still see error just reset/reload VSCode or simply delete last number and write something else then delete and write 0 again in following line pragma solidity ^0.6.0;

[uniquemj]

I have done that.. though it's still not working

[uniquemj]

**Error Message getting: **

The Solidity version pragma statement in these files doesn't match any of the configured compilers in your config. Change the pragma or configure additional compiler versions in your hardhat config.

  * contracts/test/MockV3Aggregator.sol (^0.6.0)
  * @chainlink/contracts/src/v0.6/tests/MockV3Aggregator.sol (^0.6.0)
  * @chainlink/contracts/src/v0.6/interfaces/AggregatorV2V3Interface.sol (^0.6.0)
  * @chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol (^0.6.0)
  * @chainlink/contracts/src/v0.6/interfaces/AggregatorInterface.sol (^0.6.0)

[UniqueMaharjan]

Update
I was so dumb that I wrote solidity: "0.8.19" at last of hardhat.config.js and didn't notice it.

and it was overriding my compiler versions. So dumb of me. Thank you for helping though.