Creating a New PrivateERC20 Token

PrivateERC20 is an abstract contract. To create a new token, extend it and call the constructor with a name and symbol.

Minimal Token

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "../PrivateERC20.sol";

contract MyPrivateToken is PrivateERC20 {
    constructor() PrivateERC20("My Private Token", "p.MYT") {}
}

That's it. The deployer automatically receives DEFAULT_ADMIN_ROLE and publicAmountsEnabled is set to true.

Custom Decimals

Override decimals() to change from the default 18:

contract PrivateTetherUSD is PrivateERC20 {
    constructor() PrivateERC20("Private Tether USD", "p.USDT") {}

    function decimals() public view virtual override returns (uint8) {
        return 6;
    }
}

Role-Based Access

PrivateERC20 uses OpenZeppelin AccessControl:

Role	Constant	Purpose
DEFAULT_ADMIN_ROLE	0x00	Granted to deployer; can grant/revoke roles, toggle publicAmountsEnabled
MINTER_ROLE	keccak256("MINTER_ROLE")	Required to call mint()

Grant MINTER_ROLE to contract administrator

// Solidity
bytes32 MINTER_ROLE = keccak256("MINTER_ROLE");
token.grantRole(MINTER_ROLE, bridgeAddress);

// Hardhat script
const MINTER_ROLE = hre.ethers.id("MINTER_ROLE");
const tx = await token.grantRole(MINTER_ROLE, bridgeAddress, { gasLimit: 5000000 });
await tx.wait();

Deploying with Hardhat

// scripts/deploy-my-token.cjs
const hre = require("hardhat");

async function main() {
    const [deployer] = await hre.ethers.getSigners();
    console.log("Deploying with:", deployer.address);

    const Factory = await hre.ethers.getContractFactory("MyPrivateToken");
    const token = await Factory.deploy({ gasLimit: 12000000 });
    await token.waitForDeployment();

    const address = await token.getAddress();
    console.log("MyPrivateToken deployed at:", address);

    // Grant MINTER_ROLE to another address if needed
    const MINTER_ROLE = hre.ethers.id("MINTER_ROLE");
    await token.grantRole(MINTER_ROLE, "0xYourMinterAddress");
}

main().catch(console.error);

npx hardhat run scripts/deploy-my-token.cjs --network cotiTestnet