Using Hardhat to deploy smart contract to local Polygon node

I have followed this tutorial to learn how can I use HARDHAT to deploy a Smart Contract on a Polygon testnet (and it worked just fine).

Now I want to run some tests on my local Polygon blockchain instance which is running and working fine on my local computer (with 4 nodes). I know it works because I can operate over it via jsonRPC and gRPG, consulting balances, status, etc.

So, in my hardhat.config.js I have this settings:

require("@nomiclabs/hardhat-ethers");
module.exports = {
  defaultNetwork: "matic",
  networks: {
    hardhat: {
    },
    matic: {
      url: "http://localhost:10002"
    }
  },
  solidity: {
    version: "0.8.0",
    settings: {
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  },
  paths: {
    sources: "./contracts",
    tests: "./test",
    cache: "./cache",
    artifacts: "./artifacts"
  },
  mocha: {
    timeout: 20000
  }
}

I then compiled and tryed to deploy Hardhat's sample script:

$ npx hardhat compile
>Downloading compiler 0.8.0
>Compiled 2 Solidity files successfully



$ npx hardhat run scripts/sample-script.js --network matic

>ProviderError: the method eth_accounts does not exist/is not available
>    at HttpProvider.request (/home/edu/projects/test-hardhat->polygon/node_modules/hardhat/src/internal/core/providers/http.ts:74:19)
>    at GanacheGasMultiplierProvider.request (/home/edu/projects/test-hardhat->polygon/node_modules/hardhat/src/internal/core/providers/gas-providers.ts:312:34)

It seems Hardhat is calling the method eth_accounts which does not exist in my Polygon-Edge local blockchain.

What am I doing wrong?

Thanks in advance