Developer builds a binary prediction market smart contract on Stellar's Soroban platform, demonstrating how to create true/false outcome betting using open-source code with token transfers, oracle integration, and individual claim functions.
This tutorial walks through building a complete binary prediction market on Stellar's Soroban smart contract platform. The speaker explains the contract architecture including data types, storage keys, and core functions: setup (initializing market parameters), bet (allowing users to wager on true/false outcomes), settle (oracle-driven outcome determination), and claim (individual payout processing). Key design decisions include single-market-per-contract for simplicity, one-bet-per-user to prevent bugs, and individual claims to avoid transaction limits and denial-of-service attacks. The code uses SET41 tokens for betting, includes comprehensive unit tests, and deploys to Stellar testnet. All code is open-source on GitHub.