Issue your own governance token

Once your Layer 2 is up and running, it's common to issue a governance token that can be used for raising funds for future projects and for governing your project's activities as a DAO.

The total amount of tokens in circulation can be set to a simple fixed amount or fluctuate based on any programmed ruleset.

Write the governance token issuance smart contract

Extending the OpenZeppelin ERC-20 contract, we create a governance token (BIT) for your Layer 2 on Bitcoin.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract Bitswap is ERC20 {
    constructor(uint256 initialSupply) ERC20("Bitswap", "BIT") {
        _mint(msg.sender, initialSupply);
    }
}

Clone the smart contract examples

We've prepared a few different examples for you to get started.

git clone https://github.com/trustlesscomputer/smart-contract-examples.git

Compile the contracts

To compile your contracts, use the built-in hardhat compile task.

cd smart-contract-examples
npm install
npx hardhat compile

Deploy the contracts

Review config file hardhat.config.ts. The network configs should look like this.

  networks: {
    mynw: {
      url: "<your layer 2's RPC url>",
      accounts: {
        mnemonic: "<your mnemonic with funds>"
      },
      timeout: 100_000,
    },
    blockscoutVerify: {
      blockscoutURL: "<your layer 2's explorer url>",
      ...
    }
  }

Run the deploy scripts using hardhat-deploy.

npx hardhat deploy --tags ERC20

Make sure the accounts in hardhat.config.ts have some TC in your Layer 2 that are bridged from Bitcoin Virtual Machine Layer 1.

Interact with the contracts

Once the contracts are deployed, you can interact with them. We've prepared a few hardhat tasks to make it easy for you to interact with the contracts.

npx hardhat balanceERC20
npx hardhat transferERC20 --from <your-address> --amount <transfer-amount> --to <your-address>