Arbitrum Cross-Chain Token Bridge

Overview

This project implements a custom token bridge between Ethereum Layer 1 (Sepolia testnet) and Arbitrum Layer 2 (Arbitrum Sepolia testnet). The bridge allows for seamless token transfers between the two networks using a custom gateway and token implementation.

Features

• Custom ERC20 token deployment on both L1 and L2
• Custom gateway contracts for cross-chain token transfers
• Support for token minting, burning, and bridging
• Deployment and setup script for easy token bridge configuration

Prerequisites

Before getting started, ensure you have the following installed:

• Node.js (v18 or later)
• pnpm (Package manager)
• Ethereum wallet with testnet ETH (Sepolia * Arbitrum Sepolia)

Installation

1. Clone the repository:

git clone https://github.com/count-sum/ArbitrumTokenBridge.git

2. Install dependencies:

pnpm i

3. Set up environment variables:

cp .env.example .env

4. Update .env with :

- PRIVATE_KEY (starts with 0x)
- L1_CHAIN_RPC=
- L2_CHAIN_RPC=
- TOKEN_SUPPLY_AMOUNT=
- TOKEN_BRIDGE_AMOUNT=

5. Run the following command to deploy the token and gateway contracts:

npx hardhat scripts/setupAndDeploy.ts