Verify Your Token on Basescan

Verify your token contract source code to build trust and transparency. This allows anyone to view and audit your contract code.

Your Token Contract Address

Step-by-Step Verification Guide

Navigate to Your Contract

Go to your token contract page on Basescan:

Enter your token address above to get the direct link

Click "Verify and Publish"

On the contract page:

Click the "Contract" tab
Click the "Verify and Publish" button

Choose Verification Method

Use Standard JSON Input so Basescan fetches OpenZeppelin imports automatically.

Standard JSON Input (Recommended)

Select "Solidity (Standard JSON Input)" on Basescan
Compiler Version: 0.8.31
License: ***
Optimizer: Enabled, Runs: 200
Paste the contract source below into the JSON input (or use your Hardhat artifact)

✅ Matches the deployed ChaosMemePriva: 1% fee → 0.3% creator / 0.2% dev / 0.5% backing, USDC backed

Enter Contract Source Code

Use the source below with Standard JSON Input. It matches the deployed ChaosMemePriva (USDC Backed):

1% total fee on buy/refund → 0.3% creator / 0.2% dev / 0.5% backing (backing fee stays in contract)
On-demand minting: tokens minted on buy, burned on refund (no MAX_SUPPLY)
Zero premium pricing: buy and sell at backing price
Bootstrap: 1 USDC = 1 token
MIN_AMOUNT = 0.01 USDC (10,000 with 6 decimals)
USDC backed (6 decimals) on Base Sepolia
Circulating supply uses totalSupply() - balanceOf(address(this))

Constructor Arguments (Optional)

If Basescan asks for constructor arguments, use this order:

_creator, _devFeeRecipient, _usdc, name, symbol

If unsure, leave blank and let Basescan auto-detect.

Submit and Verify

Click "Verify and Publish". Basescan will:

Compile your contract
Compare the bytecode with the deployed contract
Show a green checkmark ✅ if verification succeeds

Contract Source Code


pragma solidity ^0.8.31;

import "@openzeppelin/contracts@4.9.3/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts@4.9.3/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts@4.9.3/access/Ownable2Step.sol";
import "@openzeppelin/contracts@4.9.3/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts@4.9.3/utils/math/Math.sol";

/**
 * @title Chaos Meme Priva — Pure Eternal Edition with RefundTo (USDC Backed)
 * @notice The final, simplest, fairest, unruggable meme token with refundTo functionality
 * @dev 1% fee on buy & refund → 0.5% stays as backing forever
 * @dev Allows users to refund tokens to any address via refundTo()
 * @dev Backed by USDC (6 decimals) on Base Sepolia
 */

Full contract code only when on mainnet. We are testing on sepolia for now.

Important: The source code above uses OpenZeppelin imports. Use "Standard JSON Input" with compiler 0.8.31, *** license, optimizer enabled (runs 200). Do not use "Single file" with this code unless you provide an actual flattened file.

Troubleshooting

Error: "Constructor arguments invalid"

Try leaving constructor arguments blank. Basescan can usually auto-detect them from the deployment transaction.

Error: "Bytecode does not match"

Make sure you're using compiler version 0.8.31 and the optimizer settings match:Optimizer: Enabled, Runs: 200

Error: "Cannot find module @openzeppelin" or "File import callback not supported"

This happens when using "Single file" method with npm imports. Solution:
• Use "Standard JSON Input" method instead (recommended)
• OR flatten the contract first: npx hardhat run scripts/flatten-contract.ts

Still having issues?

Make sure you're on the correct network (Base Sepolia for testnet). You can also try using Hardhat's verification plugin for automated verification.

After Verification

Once verified, your contract will show:

✅ Green checkmark indicating verified contract
📄 Full source code visible to everyone
🔍 Ability to read and interact with contract functions
📊 Better trust and transparency for users