GbeseToken (GBT)

Contract Address: 0xC6dd34113889f23b0bf06FA77b3EBf441cB388eF
Sourcify Verified: Full Match on Sepolia (84532)
Basescan Explorer: View on Sepolia

---

Overview

GbeseToken is an ERC-20 token for the gbese webapp with built-in on-chain KYC enforcement. It integrates with a separate KYCVerifier contract to ensure that only approved wallets may mint, send, or receive GBT.

Key Features:

• Initial Supply: 1,000,000 GBT minted to owner on deployment
• Owner‐only Minting: mint(address to, uint256 amount) gated by KYC status
• KYC Integration: calls into KYCVerifier.isVerified(address) before allowing mint/transfer
• Transfer Logging: every non-mint/non-burn transfer emits a TransferLogged event with a sequential index
• Events:
  • TokensMinted(address indexed to, uint256 amount)
  • TransferLogged(uint256 indexed index, address indexed from, address indexed to, uint256 amount, uint256 blockNumber)

---

Contract Details

Constructor

constructor(address _kycVerifier) ERC20("Gbese Token", "GBT") Ownable(msg.sender); {
  _mint(msg.sender, INITIAL_SUPPLY);
  kycVerifier = IKYCVerifier(_kycVerifier);
}

• _kycVerifier: address of the deployed KYCVerifier contract
• Mints 1,000,000 GBT (18 decimals) to msg.sender

Minting

function mint(address to, uint256 amount) external onlyOwner {
  require(kycVerifier.isVerified(to), "KYC: recipient not verified");
  _mint(to, amount);
  emit TokensMinted(to, amount);
}

• Only the contract owner may call
• Requires the recipient wallet to be KYC-approved on-chain

Transfer Hook

Overrides the ERC-20 _update hook:

function _update(address from, address to, uint256 amount) internal override {
  super._update(from, to, amount);

  if (from != address(0) && to != address(0)) {
    require(kycVerifier.isVerified(from), "KYC: sender not verified");
    require(kycVerifier.isVerified(to),   "KYC: recipient not verified");

    transferIndex++;
    emit TransferLogged(
      transferIndex,
      from, to, amount, block.number
    );
  }
}

• Blocks transfers to/from unverified wallets
• Increments a global transferIndex and logs each valid transfer

---

Usage With Your DApp

Add GBT to MetaMask

await window.ethereum.request({
  method: "wallet_watchAsset",
  params: {
    type: "ERC20",
    options: {
      address: "0xC6dd34113889f23b0bf06FA77b3EBf441cB388eF",
      symbol: "GBT",
      decimals: 18,
      image: "https://yourcdn.com/gbt-logo.png"
    }
  }
});

Check Balance & Mint

import { ethers } from "ethers";
import GbeseTokenABI from "./abis/GbeseToken.json";

const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer   = provider.getSigner();
const gbese    = new ethers.Contract(
  "0xC6dd34113889f23b0bf06FA77b3EBf441cB388eF",
  GbeseTokenABI,
  signer
);

// Mint 10 GBT to user
await gbese.mint(userAddress, ethers.parseUnits("10", 18));

// Read balance
const balance = await gbese.balanceOf(userAddress);
console.log("GBT balance:", ethers.formatUnits(balance, 18));

---

Security & Next Steps

• Access Control: only the owner can mint new GBT

• KYC Enforcement: on-chain checks prevent unverified wallets from receiving or sending GBT

• Event Auditing: use TokensMinted and TransferLogged to build off-chain dashboards

• Upgradeability: added a setter for kycVerifier to support future migrations