TonDelta: The Legacy DEX, Reimagined for TON

Bringing the first successful decentralized exchange model to The Open Network.

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🚀 Mission

TonDelta is a pioneering initiative to port the core logic of EtherDelta—Ethereum’s first fully decentralized exchange—to the TON blockchain. By rewriting this foundational DeFi protocol in Tact, we are proving that complex, order-book based financial primitives can thrive in TON's asynchronous, actor-based architecture.

We are building the bridge between the history of DeFi and its future on Telegram.

💡 The Problem

While AMMs (Automated Market Makers) dominate modern DeFi, they suffer from impermanent loss and lack the precision of order books.

• Order Book Gap: Truly decentralized, on-chain order books are rare on TON due to the complexity of managing state in an asynchronous environment.
• Developer Barrier: Porting Solidity logic to TON's TVM is historically difficult, creating a barrier for Ethereum veterans entering the ecosystem.

🛠 The Solution: TonDelta

TonDelta is a fully functional, trustless exchange smart contract written in Tact. It stays true to the original EtherDelta design while adapting to TON's unique capabilities.

Key Features

• Trustless Order Book: Makers place orders on-chain; Takers fill them directly. No off-chain matching engine required.
• Native & Jetton Support: Seamlessly trade TON and any Jetton (Top-20, Memecoins, Stablecoins).
• Censorship Resistant: No admin keys, no pause functionality, fully immutable logic.
• Tact Native: Written in the modern, type-safe Tact language, serving as a reference implementation for complex DeFi logic.

🏗 Technical Architecture

TonDelta overcomes significant technical challenges to bring this model to life:

• Asynchronous Settlement: Handles Maker/Taker trade flows across shardchains without locking liquidity.
• Optimized Storage: Utilizes map<Address, Int> with custom SHA256-based address derivation to efficiently store order books and user balances without Cell underflow limits.
• Gas Efficiency: Streamlined logic ensures low-cost order placement and execution.

🗺 Roadmap

Phase 1: Core Protocol (✅ Completed)

• Smart Contract Port: Full reimplementation of Deposit, Withdraw, Order, and Trade in Tact.
• Unit Testing: Comprehensive test suite verifying all economic flows in the Sandbox environment.
• Security Hardening: Resolved serialization and underflow edge cases.

Phase 2: User Experience (In Progress)

• Telegram Mini App (TWA): A "trading terminal in your pocket." Full DEX UI embedded directly in Telegram.
• TON Connect Integration: One-click login and signing for 900M+ Telegram users.
• Push Notifications: Real-time alerts for order fills via Telegram bot.

Phase 3: Ecosystem Growth

• Mainnet Launch: Deploying the immutable contract to TON Mainnet.
• Liquidity Program: Incentives for early market makers.
• SDK Release: TypeScript SDK for bots and aggregators to plug into TonDelta liquidity.

💰 Why Support TonDelta?

(For TON Grant Committee)

1. Technical Showcase: TonDelta serves as a powerful case study for porting Solidity applications to Tact, lowering the barrier for EVM developers.
2. DeFi Diversity: It brings a classic Order Book model to the TON DeFi ecosystem, offering an alternative to AMMs.
3. Telegram-First: Designed from day one to live inside a Telegram Mini App, leveraging TON's biggest competitive advantage.

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Built with ❤️ on TON.