Otis-Arc-Swap

A simple, constant-product (x·y=k) token swap and liquidity demo built natively on Arc Testnet. Includes a live AMM swap interface, liquidity add/remove, onchain activity history, and a light/dark theme — all in a single static page, no build step required.

Live demo: https://arc-swap-otisdefi.netlify.app

Features

• Direct Web3 Connection: Connects directly via window.ethereum for a fast, native wallet experience (MetaMask, Rabby, etc.) — no WalletConnect relays.
• Constant-Product AMM: Swaps between two ERC-20 test tokens using the same x·y=k pricing formula as Uniswap V2, with a 0.30% pool fee.
• Liquidity Management: Add or remove liquidity directly from the UI, with live pool-share and payout previews before you confirm.
• Onchain Activity History: Scans recent Swap / LiquidityAdded / LiquidityRemoved events for your connected wallet — no backend or indexer required.
• Light / Dark Theme: Toggleable theme that respects your system preference and persists across visits.
• Live Pool Curve: Visualizes the pool's current position on the x·y=k curve, with a real-time preview of where your trade will land.

Getting Started

Prerequisites

• A Web3 wallet (e.g., MetaMask, Rabby) installed in your browser
• Arc Testnet added to your wallet, with some test USDC for gas

Installation

1. Clone the repository:

   git clone https://github.com/otisdefi/arc-swap.git
   

2. Open arc-swap-ui.html directly in your browser — no build step, no dependencies to install.

   Or just visit the live demo.

Network Requirements

To use the app, ensure your wallet is configured with the following network:

• Arc Testnet
  • Chain ID: 5042002
  • RPC URL: https://5042002.rpc.thirdweb.com
  • Gas token: USDC
  • Explorer: https://testnet.arcscan.app

Contracts (Arc Testnet, chain 5042002)

Contract	Address
SimpleSwap	0x56Ee3AD055121CD74d28fCc05B1e0dB4257936C7
TokenA (TKA)	0xf82C2704053b4db27Dbb213Ff271A819cA1E2910
TokenB (TKB)	0xEA92710a0Ab738dEFaadbb307af9641A5cE2C493

Disclaimer

This contract is for educational/demonstration purposes only and has not undergone an independent security audit. It should not be used on mainnet or with assets of real value.

Built With

• ethers.js (v5, via CDN)
• Vanilla HTML / CSS / JavaScript — no build step, no framework
• Solidity (contracts)

License

MIT License

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Developed by otisdefi