hardhat.config.js

require("@nomiclabs/hardhat-waffle");
require("@nomiclabs/hardhat-ethers");

// This is a sample Hardhat task. To learn how to create your own go to
// https://hardhat.org/guides/create-task.html
task("accounts", "Prints the list of accounts", async () => {
  const accounts = await ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

task("balances", "Prints the list of AVAX account balances", async () => {
  const accounts = await ethers.getSigners();

  for (const account of accounts) {
    balance = await ethers.provider.getBalance(account.address);
    console.log(account.address, "has balance", balance.toString());
  }
});

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
  solidity: {
    compilers: [
      {
        version: "0.5.16"
      },
      {
        version: "0.6.2"
      },
      {
        version: "0.6.4"
      },
      {
        version: "0.7.0"
      },
      {
        version: "0.8.0"
      }
    ]
  },
  networks: {
    hardhat: {
      gasPrice: 470000000000,
      chainId: 43112,
    },
    avash: {
      url: 'http://localhost:9650/ext/bc/C/rpc',
      gasPrice: 470000000000,
      chainId: 43112,
      accounts: ["0x56289e99c94b6912bfc12adc093c9b51124f0dc54ac7a766b2bc5ccf558d8027", 
    ]
    },
    fuji: {
      url: 'https://api.avax-test.network/ext/bc/C/rpc',
      gasPrice: 470000000000,
      chainId: 43113,
      accounts: [
    ]
    },
    mainnet: {
      url: 'https://api.avax.network/ext/bc/C/rpc',
      gasPrice: 470000000000,
      chainId: 43114,
      accounts: [
    ]
    }
  }
};

thank you very much