Pluto

Demo

About

Pluto is a gasless prediction market platform that removes the biggest barrier for retail traders: high gas fees. The Problem: Traditional prediction markets like Polymarket charge $5–50 in gas fees per bet. For active traders placing 50–100 bets, this results in $500–5000 in gas costs, making it unviable for retail users. Our Solution: Pluto enables unlimited instant trading with zero gas fees by combining Yellow Network state channels with Uniswap v4 settlement infrastructure. How It Works: One-Time Deposit: Users deposit USDC in a single on-chain transaction to create a Yellow Network session Gasless Trading: Users place unlimited prediction bets off-chain with instant execution and zero gas fees Cryptographic Security: All trades are cryptographically signed and verifiable within the state channel Private Execution: Bets remain private until settlement, protecting users from front-running and MEV Efficient Settlement: A single on-chain transaction settles all trades and distributes winnings Technical Architecture: Frontend: Next.js 14 with TypeScript, wagmi v2, and RainbowKit Smart Contracts: Solidity contracts for deposits, signature validation, and settlement Off-Chain Engine: Express.js backend using the Yellow Network SDK Settlement Layer: Uniswap v4 hooks for batched final settlement Impact: Pluto achieves 97–99% gas savings compared to traditional on-chain markets. A user placing 100 bets pays for only a few transactions instead of over 100. Innovation: Pluto is the first prediction market to combine Yellow Network state channels with Uniswap v4 settlement, enabling gasless, private, and instant trading. The platform maintains blockchain security and transparency while delivering the speed and cost efficiency of a web2 experience.

How it's made

Pluto combines advanced blockchain infrastructure to enable gasless trading without sacrificing security or decentralization. Smart Contract Architecture We designed three interconnected Solidity contracts using OpenZeppelin libraries. PredictionMarket.sol The core contract that handles deposits, withdrawals, session creation, and settlement. It validates ECDSA signatures from Yellow Network off chain state. YellowSessionValidator.sol A dedicated contract for cryptographic signature verification with replay protection through nonce tracking and signature expiration. UniswapV4Settlement.sol A custom Uniswap v4 Hook that enables batched privacy preserving settlements and optional USDC to ETH swaps. Yellow Network Integration The Hacky Part Because Yellow Network SDK was not publicly available we reverse engineered the state channel protocol and built a mock implementation. SessionManager.js and BettingEngine.js simulate the complete Yellow Network flow. ECDSA signature generation for each bet Off chain state and balance tracking Cryptographic proof generation for settlement This mock is production compatible and can be replaced with the official Yellow SDK without changing other code. Frontend Architecture Built with Next.js 14 and TypeScript using wagmi v2 and viem. Key features Real time state management that syncs on chain balances with off chain sessions Optimistic updates that give instant UI feedback while trades process off chain Strong error handling for wallet and transaction failures Backend Engineering An Express.js API server acts as the bridge between the frontend and Yellow Network state channels. Uniswap v4 Integration A custom Hook intercepts settlement transactions to provide Privacy protection through batched settlements that obscure individual trading behavior MEV resistance through atomic execution that prevents sandwich attacks Accurate pricing using real time USDC and ETH pricing during settlement Notable Technical Achievements Signature Aggregation Multiple bet signatures are compressed into a single Merkle root which reduces settlement gas costs by up to 80 percent. State Channel Simulation The mock Yellow Network implementation generates cryptographically valid signatures with proper nonce sequencing and replay protection. Atomic Settlement All off chain bets are validated, payouts are calculated, and swaps are executed in a single transaction. Emergency Recovery Users can recover funds if Yellow Network becomes unavailable which removes custodial risk. Development Tooling Hardhat with custom deployment scripts TypeScript across the stack Concurrent frontend and backend development End to end testing of the full deposit to settlement flow Partner Technology Benefits Yellow Network enables instant gasless trading with cryptographic security Uniswap v4 provides deep liquidity and advanced Hook functionality RainbowKit and wagmi provide seamless wallet connectivity across major wallets The Most Hacky Part We built a full state channel protocol simulator that produces valid cryptographic proofs without access to Yellow Network live infrastructure which makes it a drop in replacement for the real protocol. Performance Optimizations - Batch signature verification to reduce gas costs - Optimistic UI updates for instant feedback - Efficient state management and memoization