Crancer Dev — Polymarket Specialist

Posted on Jun 27

I open-sourced Open-source Solana Prediction Market smart contract built with Anchor

#solana #anchor #bonding #decentralized

Open-source Solana Prediction Market smart contract built with Anchor

Open-source Solana Prediction Market smart contract built with Anchor. Enables creation of binary YES/NO outcome markets with bonding curve trading (SOL tokens), platform + creator fees, Metaplex metadata, whitelist support, and optional backend co-signing for controlled launches.

I open-sourced solana-prediction-market-smart-contract for developers in Solana / Anchor smart contract development. This post walks through what it does, how the pieces fit together, and how to run it locally.

Live demo / site: https://takes.fun/

Why I built this

Automate trading or snipe strategies with a typed codebase
Backtest ideas before deploying with real capital
Extend the bot with your own risk rules and market filters

Most tutorials stop at a smart contract or a UI mockup. I wanted a complete vertical slice — wallet flow, on-chain logic, backend state, and a responsive frontend — so you can study or fork a production-shaped codebase.

What it does

Open-source Solana Prediction Market smart contract built with Anchor
Enables creation of binary YES/NO outcome markets with bonding curve trading (SOL tokens), platform + creator fees, Metaplex metadata, whitelist support, and optional backend co-signing for controlled launches
Platform fees on buy and sell (standard and reduced “small” fee tiers for whitelisted users).
Creator fees on buy and sell.
Cross-side liquidity shift on buys (configurable cross_sol_factor), which links YES and NO reserve dynamics.
amount — Input amount (lamports for buy, token amount for sell depending on direction).
direction — 0 = buy, 1 = sell.
token_type — 0 = NO, 1 = YES.

Architecture at a glance

On-chain program — Anchor/Rust logic for escrow, rooms, and settlement
Application layer — TypeScript backend/frontend tying on-chain and off-chain flows
Feature — Open-source Solana Prediction Market smart contract built with Anchor
Feature — Enables creation of binary YES/NO outcome markets with bonding curve trading (SOL tokens), platform + creator fees, Metaplex metadata, whitelist support, and optional backend co-signing for controlled launches
Feature — Platform fees on buy and sell (standard and reduced “small” fee tiers for whitelisted users).

User Wallet  →  On-chain Program  →  VRF / Settlement
                    ↓
              Backend (API + WebSockets)  →  MongoDB / state
                    ↓
                 Frontend UI (real-time)

Adjust the diagram to match your repo layout if components differ.

Tech stack

Rust
Solana
Anchor
TypeScript

Quick start

git clone https://github.com/DexCrancer/solana-prediction-market-smart-contract.git
cd solana-prediction-market-smart-contract

Setup steps:

Install dependencies (see README — typically npm install or yarn)
Copy .env.example to .env and fill in RPC, wallet, and API keys
Run local validator or point to devnet/mainnet as documented
Start the backend and frontend; connect wallet and create a test room

See the full README for environment variables, deploy scripts, and test commands: https://github.com/DexCrancer/solana-prediction-market-smart-contract

What to explore in the repo

Program / contract entrypoints and account models
API routes and WebSocket event handlers
Frontend wallet adapter and game room components
Tests, scripts, and deployment configs

Contributing

Issues and PRs are welcome. If this helped you learn something, a ⭐ on GitHub makes it easier for others to find.

anchor #bondingcurve #decentralizedbetting #forecasting #openbook #predictionmarket

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