Solana Prediction Market Smart Contract

A prediction market smart contract on Solana. Create and trade YES/NO outcome tokens, then migrate completed markets to Raydium. Built with Anchor for the Solana prediction market ecosystem.

What is this?

This repo provides an on-chain prediction market smart contract that runs on Solana. Market creators launch binary (YES/NO) markets; traders swap SOL for outcome tokens and back. When a market completes, liquidity can be migrated to Raydium. Use it as a foundation for a Solana prediction market app or integrate the program into your own frontend.

Features

• Create prediction markets with YES and NO outcome tokens
• Swap SOL ↔ YES/NO tokens (buy and sell) on a bonding curve
• Creator claims and fee distribution
• Migrate completed markets to Raydium
• Admin config for fees and launch parameters

Prerequisites

Install Rust, Solana, and Anchor (AVM): https://solana.com/docs/intro/installation

Use Anchor v0.30.1:

avm install 0.30.1
avm use 0.30.1

Quick Start

Build the program

anchor run build

If you use a custom CARGO_TARGET_DIR (e.g. $HOME/.cargo/target), link the built program into the deploy folder:

ln -s $HOME/.cargo/target/sbf-solana-solana/release/takesfun.so $PWD/target/deploy/takesfun.so

Run tests

Run tests without a local network:

anchor test --provider.cluster Localnet

Local network and deployment

Configure for localhost and start a validator:

solana config set -ul
solana config set -k ./keys/EgBcC7KVQTh1QeU3qxCFsnwZKYMMQkv6TzgEDkKvSNLv.json

# Start validator with metadata program for tokens
solana-test-validator -r --bpf-program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s spl-programs/metadata.so

Deploy the prediction market program:

anchor deploy --provider.cluster Localnet

Run tests against localnet:

anchor run test --provider.cluster Localnet
anchor run test --provider.cluster Localnet -- "'correctly configured'"

Devnet

Set the cluster in Anchor.toml to your devnet RPC, then:

anchor deploy

Configuration

Call the configure instruction (admin only) to set global config: fee amounts and allowed launch parameters for the prediction market smart contract.

CLI: Test the prediction market

Initialize program config

yarn script config

Launch a prediction market (create YES/NO market)

yarn script launch

Swap SOL for outcome tokens

yarn script swap -t <TOKEN_MINT> -a <SWAP_AMOUNT> -s <SWAP_DIRECTION>

• TOKEN_MINT: YES or NO token mint (from launch output)
• SWAP_AMOUNT: Amount in SOL or tokens to swap
• SWAP_DIRECTION: 0 = Buy, 1 = Sell

Migrate to Raydium

After the curve is completed, migrate the market to Raydium:

yarn script migrate -t <TOKEN_MINT>

TOKEN_MINT: mint address of the market token to migrate.

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Author

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Keywords: prediction market, prediction market smart contract, Solana prediction market, binary outcome market, YES NO tokens, Solana Anchor.