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Season 1 · DeFi & Open Finance

IOPN DEX

The first decentralized exchange on OPN Chain — swap tokens and provide liquidity, fully on-chain.

WithdrawnDeFi & Open Finance

by ankhanghp01 · submitted Jun 2, 2026

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Description

01/03

What the builder said.

Written by the team, rendered as the markdown they typed in the submission wizard.

What we built

IOPN DEX is the first decentralized exchange built natively for OPN Chain. It is an automated market maker (AMM) that lets anyone swap tokens or provide liquidity directly on-chain — no intermediaries, no order books, no sign-ups.

Why

OPN Chain is fast, EVM-compatible, and has near-zero fees, but the ecosystem lacked a core piece of DeFi infrastructure: a place to trade tokens and bootstrap liquidity. IOPN DEX fills that gap and gives every other project on OPN Chain a foundation to build on.

How it works

  • Liquidity providers deposit a pair of tokens into a pool and receive LP tokens representing their share.
  • Traders swap against these pools using the constant-product formula (x * y = k).
  • Each trade charges a 0.30% fee that goes to liquidity providers, rewarding them for supplying liquidity.
  • Native OPN is fully supported: it is automatically wrapped to WOPN for routing, so users trade and pool with the chain's native coin seamlessly.

What's included

  • A full set of AMM smart contracts deployed on OPN testnet: Factory, Pair, Router, and Wrapped OPN.
  • A clean, beginner-friendly web app for swapping, adding/removing liquidity, and claiming demo tokens from a built-in faucet.
  • One-click wallet connection with automatic OPN network detection and switching.

Try it

Connect a wallet on the demo, claim demo tokens (tUSD, tBTC) from the Faucet tab, then swap or add liquidity. Everything settles on-chain in about one second.

Roadmap

02/03

What ships next.

The builder's own next-quarter plan. Use it to gauge follow-through and ambition.

Q2 2026 — Core AMM (Done)

  • Constant-product AMM contracts deployed on OPN testnet: Factory, Pair, Router, Wrapped OPN.
  • Native OPN support via auto-wrapping to WOPN.
  • Swap, add/remove liquidity, and a built-in demo-token faucet.
  • Simple, responsive web app with one-click wallet connect and auto network switching.

Q3 2026 — Trader experience

  • Multi-hop routing across pools for best execution price.
  • Price charts and per-pool analytics (TVL, volume, APR).
  • Transaction history and an LP portfolio view.
  • Configurable slippage and transaction deadline settings.

Q4 2026 — Token (IDX) & incentives

  • Launch the IOPN DEX governance token: IDX (ERC-20).
  • Liquidity mining: distribute IDX to liquidity providers to bootstrap TVL.
  • Fee sharing: stake IDX to earn a share of the 0.30% trading fees.
  • Proposed allocation: 40% liquidity mining, 20% team & contributors (vested), 20% community treasury, 15% ecosystem/partners, 5% initial liquidity.

Q1 2027 — TGE & governance

  • Token Generation Event (TGE) for IDX with public, transparent distribution.
  • On-chain governance: IDX holders vote on fees, token listings, and treasury use.
  • LP staking dashboard with real-time rewards tracking.

2027 — Ecosystem & mainnet

  • Third-party security audit and a public bug-bounty program.
  • Mainnet deployment on OPN Chain.
  • Integration SDK so other OPN dApps can route swaps through IOPN DEX.
  • Curated token lists and community-created pools.

On-chain proof

03/03

5 contracts on OPN Chain.

The chain itself confirmed every deployment is valid, signed by the builder's wallet, and inside the season's window.

  • 01Test USDPrimary

    0x6Ff8f85689cFca689a924E760b1C9EFa5e81f23b

    tx 0x3695b1c6743cd3fe4327eeecc4a06b582ec818db00061ebf4e898d95aa4254cc

    deployed Jun 2, 2026 · block 17776115

  • 02Test BTC

    0x1500a7d993024C6aA1E4adBE80625bf5c5bC7018

    tx 0xa017e56ac313f6d2144fa768be9af60ba3ad86312f45d7d383bcad3e1a2eac87

    deployed Jun 2, 2026 · block 17776118

  • 03DexRouter

    0x9ae762494Bd45168d4Dad1A2627c91fF1914e004

    tx 0xc8e861b414457b24dd91ac9866aa2bad02f2771df2a90a972b3a3c52f09255c7

    deployed Jun 2, 2026 · block 17776111

  • 04DexFactory

    0x7A6728b2aF2E8FA235A25A888680d59584866e62

    tx 0x1cada534c2faa43055fe0e8798a97f57e4710969abcc3d3f6584675439edf1fb

    deployed Jun 2, 2026 · block 17776108

  • 05Wrapped OPN

    0xE5a2aC0696cE41934094877128d812184ddB96c0

    tx 0x28786f94f9c470b2a470730106e972c0445636457f237e8c4be2e743be81bba8

    deployed Jun 2, 2026 · block 17776105