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LS-LMSR Simulator Challenge - Senior Solidity / DeFi Dev

XO.market is building the next-gen prediction market using LS-LMSR mechanics.

This challenge is designed to test how you think, structure code, and implement DeFi math.

Build a minimal simulator that demonstrates LS-LMSR pricing and cost dynamics when trading outcome shares.

Your AMM must be deplyed as a smart contract on any EVM-compiatible testnet (e.g. Sepolia, Base Sepolia, Mumbai ..etc.)

Requirements

- Use any modern frontend framework (React, Vue, Svelte, etc.).

- Your app should allow:

Choosing number of outcomes (2–5)

Setting liquidity params b0 and α

Viewing current outcome quantities and prices

Simulating buying X shares of a selected outcome and showing trade cost + updated prices

Your implementation should support:

✅ Creating a binary or multi-outcome market

✅ Buying and selling outcome shares

✅ Proper LS-LMSR price calculation and cost function behavior

✅ Proper accounting of pool liquidity and share balances

✅ A clean, minimal interface to interact with the contract

Bonus points for:

🚀 Deploying a simple frontend simulator to visualize trades and price movement

🚀 Gas-efficient implementation

🚀 Well-structured repo and readable code

🚀 Clear README explaining how to run and test

📤 Submission

Please submit a GitHub repo link with:

Contract code

frontend / simulator

README with basic instructions

You can deploy on any testnet you like. No need for a backend.