Deploy/test on BSC Testnet

Developers can deploy and interact with the GothamMixer smart contract on Binance Smart Chain (BSC) Testnet to test and integrate before going live on mainnet.

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🧰 Prerequisites

Before you begin:

• Node.js and npm installed

• Hardhat (or Foundry/Truffle) environment, or Remix IDE

• A funded BSC Testnet wallet

• BSC Testnet RPC endpoint

• Contract source code (GothamMixer01.sol)

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📦 Install Dependencies (with Hardhat)

mkdir gothamcash-testnet && cd gothamcash-testnet
npm init -y
npm install --save-dev hardhat
npx hardhat

Choose "Create a basic sample project" and then install:

npm install --save-dev @nomicfoundation/hardhat-toolbox

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⚙️ Configure Hardhat for BSC Testnet

Edit hardhat.config.js:

require("@nomicfoundation/hardhat-toolbox");

module.exports = {
  solidity: "0.8.20",
  networks: {
    bsctestnet: {
      url: "https://data-seed-prebsc-1-s1.binance.org:8545/",
      chainId: 97,
      accounts: [process.env.PRIVATE_KEY]  // add your testnet wallet private key
    }
  }
};

Create a .env file to store your testnet private key (never commit this!):

PRIVATE_KEY=your_testnet_private_key_here

Install dotenv if needed:

npm install dotenv

Then add require("dotenv").config(); at the top of hardhat.config.js.

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🛠️ Deploy the Contract

Create a new file: scripts/deploy.js:

async function main() {
  const GothamMixer = await ethers.getContractFactory("GothamMixer01");
  const mixer = await GothamMixer.deploy();
  await mixer.deployed();

  console.log("GothamMixer deployed to:", mixer.address);
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

Deploy to BSC Testnet:

npx hardhat run scripts/deploy.js --network bsctestnet

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🧪 Interact with the Contract

Once deployed, you can test:

• deposit() using Hardhat scripts or front-end with MetaMask

• withdraw() using the corresponding note

• Fee toggling and expiry testing

• Listening for events (Deposited, Withdrawn, etc.)

Use cast, ethers.js, or web3.js for local testing scripts or write integration code in your dApp frontend.

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🔍 Useful Links

• BSC Testnet Faucet: https://testnet.bnbchain.org/faucet-smart

• BSC Testnet Explorer: https://testnet.bscscan.com

• Public RPC: https://data-seed-prebsc-1-s1.binance.org:8545/

• Smart contracts: https://github.com/GothamCash/contracts

• User interface (dApp): https://github.com/GothamCash/interface

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🛡️ Reminder: Always test with dummy notes and avoid using real secrets or wallets during development. Never expose your private key or commit .env files.