Traadence's Polymarket Clone Platform turns a market question into a tradable YES/NO pool, records wallet-funded positions, and closes the market through a controlled resolution workflow.
The finished MVP is a browser-based prediction exchange for operators who need more than a visual prototype. It includes market creation, reserve-based price movement, wallet signing, position accounting, settlement, redemption, and an administrator console. Trading state and resolution state are kept separate so an outcome cannot be edited by changing the interface or database alone.
Binary Outcome Trading Without Hidden State
Each market begins with a question, two mutually exclusive outcomes, a closing timestamp, resolution criteria, and starting liquidity. A buy changes the YES and NO reserve relationship, so the next quote reflects current pool inventory rather than a manually typed percentage. Prices are presented as implied probabilities for readability, while contracts, balances, fees, and redemption rights remain explicit. The CFTC overview of prediction markets and event contracts is treated as a regulatory reference point, not as permission to launch in every jurisdiction.
Prediction-market demand can persist beyond one news cycle, but product design still determines whether participants understand the contract they are trading. Messari's analysis of prediction-market growth emphasizes clear markets and quick resolution; the MVP therefore stores resolution wording and the designated evidence source at creation time.
Core Features
| Feature | Description |
|---|---|
| Market Factory and Admin Controls | Operators lose consistency when every market is assembled manually across separate screens. The admin console creates the question, category, close time, initial liquidity, fee rule, resolution wording, and reference source in one signed workflow. |
| YES/NO Pool Quotes | Static percentages become stale as soon as orders arrive. The reserve-based quote library recalculates both outcome quotes after every accepted trade and rejects transactions when the user's maximum slippage is exceeded. |
| Wallet-Signed Deposits and Trades | Users should not hand private keys to the application. The connector supports MetaMask and Phantom for account connection, message signing, token approval, deposits, trades, and redemptions. |
| Outcome Position Ledger | A single balance obscures which market and outcome a user owns. The ledger records market-specific YES and NO units, weighted entry value, redeemable status, and the transaction hash associated with each state change. |
| Controlled Resolution Contract | Database-only resolution can be changed without an on-chain trail. The Solidity contract restricts resolution to an authorized role, freezes trading after close, records the winning outcome, and enables redemption only once. |
| Audit-Ready Operator History | Disputes are harder to investigate when creation and resolution actions overwrite prior values. Every privileged action emits an event and stores the acting wallet, timestamp, market identifier, and evidence hash. |
Architecture That Separates Trading From Resolution
The interface uses the Next.js App Router for server-rendered market pages, browser-side wallet actions, and protected admin routes. Tailwind CSS keeps responsive states consistent across market cards, trading tickets, wallet prompts, and the operator console. PostgreSQL indexes searchable metadata and cached read models; it never replaces contract ownership or settlement state.
Contracts deploy to Polygon PoS to keep the MVP EVM-compatible and make wallet support straightforward. The contract layer contains a market factory, binary market instances, pool math, role checks, pause controls, and redemption logic. A Node.js indexer listens for contract events and updates the read database, while background reconciliation compares indexed rows with chain state after every confirmed block.
| Layer | Implementation | Why it is used |
|---|---|---|
| Web application | Next.js, TypeScript, Tailwind CSS | Supports public market pages, signed wallet flows, and a separate administrator surface without maintaining two frontend projects. |
| Contract layer | Solidity contracts on Polygon PoS | Keeps market creation, trading, close status, resolution, and redemption verifiable outside the application database. |
| Read model | PostgreSQL with event-indexed projections | Makes filters, activity feeds, and portfolio views fast while preserving the contract as the settlement source of truth. |
| Operations | Worker queue, structured logs, reconciliation jobs | Retries event ingestion, detects missed blocks, and exposes failed deposits or unresolved markets before they become silent support cases. |
The Market Lifecycle
- Create: An authorized operator enters the market question, YES/NO definitions, close time, fee settings, starting reserves, resolution criteria, and evidence source.
- Fund: Liquidity is approved and deposited, the contract initializes both outcome pools, and the public market page becomes available.
- Trade: A connected wallet requests a quote, checks expected units and slippage, signs the transaction, and receives outcome positions after confirmation.
- Close: New trades are rejected once the contract reaches the closing timestamp, while existing positions remain visible and non-redeemable.
- Resolve and redeem: The administrator submits the winning outcome with an evidence hash. The contract enables one-time redemption for winning units and records each payout transaction.
Project Directory
prediction-market-mvp/
├── apps/
│ ├── web/
│ │ ├── app/
│ │ │ ├── markets/
│ │ │ │ └── [marketId]/
│ │ │ │ └── page.tsx
│ │ │ ├── admin/
│ │ │ │ └── markets/
│ │ │ │ └── new/
│ │ │ │ └── page.tsx
│ │ │ └── portfolio/
│ │ │ └── page.tsx
│ │ ├── components/
│ │ │ ├── TradeTicket.tsx
│ │ │ ├── WalletConnect.tsx
│ │ │ └── MarketCard.tsx
│ │ └── lib/
│ │ ├── contracts.ts
│ │ ├── quotes.ts
│ │ └── validation.ts
│ └── indexer/
│ └── src/
│ ├── listeners.ts
│ ├── reconcile.ts
│ └── projections.ts
├── contracts/
│ ├── src/
│ │ ├── MarketFactory.sol
│ │ ├── BinaryMarket.sol
│ │ ├── PoolMath.sol
│ │ └── ResolutionManager.sol
│ ├── test/
│ │ ├── BinaryMarket.t.sol
│ │ └── ResolutionManager.t.sol
│ └── script/
│ └── Deploy.s.sol
├── packages/
│ ├── database/
│ │ └── schema.prisma
│ └── shared/
│ ├── market-types.ts
│ └── contract-abis.ts
├── docker-compose.yml
├── .env.example
└── README.md
Use Cases
- Launch a curated event market where an operator defines precise YES/NO conditions, publishes the evidence source, and controls when trading closes.
- Run crypto, sports, governance, or business-outcome markets through one reusable market factory instead of deploying a custom contract for every question.
- Give wallet-native users a trade ticket that shows expected units, current implied probability, transaction approval, and maximum slippage before signing.
- Investigate disputes with contract events, evidence hashes, administrator wallet history, and indexed transaction records rather than relying on editable database notes.
MVP Acceptance Benchmarks
Acceptance is measured through reproducible system behavior, not trading returns. The test suite seeds 1,000 markets, runs 100 create-to-redemption lifecycle cases, and verifies that indexed balances reconcile with contract state after each confirmed block.
| Check | Acceptance target | Method |
|---|---|---|
| Market discovery | p95 read response below 500 ms | Query seeded categories, statuses, and closing-time ranges against the indexed read model. |
| Quote protection | Trades revert above the submitted slippage limit | Change pool reserves between quote and execution, then confirm the contract rejects the stale transaction. |
| Lifecycle integrity | 100 consecutive creation, close, resolution, and redemption cases pass | Run contract and browser tests with both winning outcomes, invalid roles, duplicate redemption, and paused trading. |
| Indexer recovery | No permanent balance drift after a simulated missed block | Stop the event worker, advance chain state, restart it, and reconcile from the last stored checkpoint. |
How to Launch Markets Using Traadence's Polymarket Clone Platform
Download & Set Up the Project
Download, set up, and install Traadence's Polymarket Clone Platform to get the project running. If you hit any difficulty, contact us here.
Connect and Open Admin
Connect an authorized wallet, open the admin console, and confirm the active Polygon network, contract addresses, operator role, and available liquidity token balance.
Define the Market
Enter the question, YES/NO definitions, close time, starting reserves, fee rule, slippage limit, resolution criteria, and evidence source, then review the generated contract summary.
Publish, Trade, and Resolve
Select Publish Market, monitor confirmed trades and pool prices, then submit the winning outcome and evidence hash so eligible wallets can redeem their positions.
Operational Boundaries
Manual resolution is intentional for this MVP, but it concentrates authority in the administrator role. A production launch should define signer custody, multi-signature approval, incident pausing, market-review rules, evidence retention, and jurisdiction-specific access controls before public deployment. The software records actions; it does not establish legal eligibility or verify the truth of an external event by itself.
Traadence can extend the delivered code through custom trading platform development and handle deployment and monitoring when the operator needs new market types, oracle adapters, stronger governance, or integration with an existing identity and compliance stack.
Questions
How are YES and NO prices calculated?
Prices are derived from the relative reserves in the two outcome pools. Each accepted trade changes those reserves, the quote engine recalculates the implied probability, and the transaction reverts when execution would exceed the user's submitted slippage limit.
Can an administrator resolve a market without changing its trade history?
Yes. Resolution is a separate privileged contract action that records the winning outcome and an evidence hash; it does not rewrite prior trades, balances, or transaction events. Once resolved, the market cannot accept new trades and winning units become redeemable.
Does the platform support both MetaMask and Phantom?
Yes. Both wallets connect through the browser wallet layer for account selection, signatures, token approvals, deposits, trades, and redemptions on the configured EVM network. The application never asks users to paste or upload private keys.