ERC7984 Standard

This example demonstrates how to create a confidential token using OpenZeppelin's smart contract library powered by ZAMA's FHEVM.

To run this example correctly, make sure you clone the fhevm-hardhat-template and that the files are placed in the following directories:

• .sol file → <your-project-root-dir>/contracts/

• .ts file → <your-project-root-dir>/test/

This ensures Hardhat can compile and test your contracts as expected.

ERC7984Example.sol

// SPDX-License-Identifier: BSD-3-Clause-Clear
pragma solidity ^0.8.24;

import {Ownable2Step, Ownable} from "@openzeppelin/contracts/access/Ownable2Step.sol";
import {FHE, externalEuint64, euint64} from "@fhevm/solidity/lib/FHE.sol";
import {EthereumConfig} from "@fhevm/solidity/config/ZamaConfig.sol";
import {ERC7984} from "@openzeppelin/confidential-contracts/token/ERC7984.sol";

contract ERC7984Example is EthereumConfig, ERC7984, Ownable2Step {
    constructor(
        address owner,
        uint64 amount,
        string memory name_,
        string memory symbol_,
        string memory tokenURI_
    ) ERC7984(name_, symbol_, tokenURI_) Ownable(owner) {
        euint64 encryptedAmount = FHE.asEuint64(amount);
        _mint(owner, encryptedAmount);
    }
}

ERC7984Example.test.ts

ERC7984Example.fixture.ts