Cardano-Based Multi-Outcome Predicition Platform
€250-750 EUR
Betalt ved levering
AI said it best:
Core Idea: A Cardano Prediction Market
Users can place bets on a question or event (e.g., “Which AI model will be the best by 2025?” or “Will BTC hit 90k or 100k first?”).
Multiple possible outcomes, each with a “Yes” or “No” betting option.
A small fee (e.g., 1 cent) is added to each bet and collected by the admin.
On-Chain Logic (Plutus/Haskell)
The MarketDatum stores outcomes, an end time, and market status (OPEN, CANCELED, SETTLED).
Redeemer actions include PlaceBet, Settle, CancelMarket, and ClaimWinnings.
Once the market is settled by the admin or an oracle, winners claim their funds via ClaimWinnings.
Off-Chain Architecture & Database
A backend (Node.js/TypeScript) tracks on-chain events (e.g., via Blockfrost or a Cardano node) and updates a local SQL database:
markets (basic info: question, status, start/end times),
market_outcomes (all possible answers, each with “Yes/No”),
bets (tracks each user’s bet amount, fee, claim/refund status).
This allows fast queries and a convenient admin UI without scanning the blockchain every time.
Wallet Integration (CIP-30)
To enable easy interaction with Cardano-based wallets via browser:
Wallets mentioned could include Minswap (if it supports CIP-30), Vespr, Yoroi, OKX, etc. (Note: Some of these might not be typical CIP-30 wallets, but the general approach remains the same.)
A library like cardano-dapp-js (or a similar approach from Minswap’s code) provides a “Wallet Picker” component for connecting with various wallets.
Structure & Components
Frontend (React/TypeScript): Pages for listing markets, placing bets, admin controls (settle/cancel).
Contracts (Plutus): The validator script ensuring correct bet logic, payouts, refunds, and fees.
Backend (Node.js): Maintains off-chain data, provides REST/GraphQL endpoints, orchestrates transaction building if needed (e.g., batch transactions or “Scooper” logic).
Reference to Minswap Code
Minswap’s open-source repos can serve as examples for CIP-30 integration, transaction building, and off-chain “Scooper” design.
Review the frontend (React) code to see how they handle wallet connections and on-chain interactions.
Potential Lending Idea
The same approach (connecting wallets, using CIP-30, building transactions) can be adapted for a lending scenario (e.g., deposit 100 ADA, repay 110, third party covers difference, etc.).
However, that requires separate lending-specific Plutus contracts; the wallet-connection flow remains similar.
Key Takeaways
Multi-Outcome markets: Each outcome can have “Yes/No.”
Fees: A small fee on each bet can go to the admin or a fee UTXO.
Admin Flexibility: Admin can settle, cancel, or change details if desired.
Scalable Design: Off-chain DB for fast lookups and a Plutus contract for fund security.
Wallet Picker: Use CIP-30 or a compatible system for Minswap, Vespr, Yoroi, OKX wallets, etc.
In short, the project is a Cardano-based prediction market (or potentially other DeFi functionalities) combining Plutus smart contracts, a Node.js/TypeScript backend, and a React frontend with CIP-30 wallet integration.
Projekt ID: #38940987
Om projektet
141 freelancere byder i gennemsnit €488 timen for dette job
Hi there I propose to develop a Cardano Prediction Market platform where users can place bets on various questions or events with multiple outcomes. The platform will utilize Plutus sm Flere
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