hardhat.config.js

require("@nomicfoundation/hardhat-toolbox");
require('@openzeppelin/hardhat-upgrades');
require('dotenv').config()

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  solidity: {
    compilers: [
      {
        version: "0.8.17",
      },
      {
        version: "0.5.16",
      },
      {
        version: "0.5.0",
      },
      {
        version: "0.6.6",
        settings: {          // See the solidity docs for advice about optimization and evmVersion
          optimizer: {
            enabled: true,
            runs: 999999
          },
          evmVersion: "istanbul", 
          outputSelection: {
           "*": {
             "": [
               "ast"
             ],
             "*": [
               "evm.bytecode.object",
               "evm.deployedBytecode.object",
               "abi",
               "evm.bytecode.sourceMap",
               "evm.deployedBytecode.sourceMap",
               "metadata"
             ]
           },
         }
         }
      },
    ],
    overrides: {
      "contracts/libraries/UniswapV2Library.sol": {
        version: "0.5.0",
      },
      "contracts/UniswapV2Factory.sol": {
        version: "0.5.16",
        settings: { }
      }
    },
  },
  networks: {
    fuji: {
      url: `https://api.avax-test.network/ext/bc/C/rpc`,
      accounts: [process.env.PRIVATE_KEY]
    }
  },
  etherscan: {
    apiKey: {
      avalancheFujiTestnet: process.env.SNOWTRACE_API_KEY
    }
  }
};