Propex Docs

Propex is a non-custodial prediction-market platform. Each market asks a binary question — will X happen by time Y? Users buy YES or NO shares against an automated market maker. When the market resolves, winning shares redeem 1:1 for USDC.

Everything runs on-chain on Arc Testnet. USDC is the native settlement asset. Propex itself does not custody user funds — trades are executed by the per-market contract.

Each market is a standalone PredictionMarket contract using a Fixed-Product Market Maker (FPMM). Two reserves — yesReserve and noReserve — are kept on an invariant curve. Buying YES shares removes YES from the pool, pushing its implied probability up; selling does the reverse. Prices are always between $0.00 and $1.00 and sum to one.

1. An admin deploys a market via the factory, seeded with USDC liquidity.
2. Traders buy/sell YES or NO shares at the current curve price.
3. At the resolution time, the outcome is submitted on-chain.
4. Winning shares redeem 1:1 for USDC. Losing shares expire worthless.

To trade, connect a wallet on Arc Testnet and open any market. Enter a USDC amount for Buy, or a share amount for Sell. The UI quotes the expected shares / USDC you'll receive at the current curve price, including fee.

• Minimum bet size is 0.01 USDC so fees never round to zero.
• You can exit a position at any time by selling back into the pool.
• Slippage increases with size relative to pool depth — check the quote before confirming.

A flat platform fee of 1.50% applies symmetrically on both buy and sell. Fees are forwarded on-chain to the Treasury contract the moment a trade settles — there are no withdrawal or deposit fees, no spread, and no hidden charges.

The fee rate is bounded on-chain by MAX_FEE_BPS in the Treasury and can be updated by the owner within that cap.

Each market specifies a resolution time and a resolution rule in its description. After the resolution time elapses, an authorized resolver submits the outcome on-chain (YES, NO, or CANCELLED).

• YES / NO: winning shares redeem 1 USDC each.
• CANCELLED: all positions are refunded at pool-proportional value.
• Resolved markets are removed from the live feed and remain accessible at their market URL.

Core addresses on Arc Testnet. Market addresses are deterministic per factory deploy — find them via the factory's getAllMarkets().

The leaderboard ranks traders by realized PnL across resolved markets. Data is derived entirely from on-chain events — no off-chain scoring or boosts.

New markets are launched in a daily batch by the admin wallet through the admin panel. Each launch seeds USDC liquidity from the treasury and registers the market with the factory. The admin role is a client-side UX gate; on-chain authority is enforced by MarketFactory.owner.

For questions, bug reports, or feedback — reach out on X (Twitter) or email support@propex.xyz. For on-chain issues include your wallet address, the market address, and the tx hash.

Propex is provided "as is" on Arc Testnet for research and evaluation. Trading involves risk of loss; do not deposit funds you cannot afford to lose. By using Propex you acknowledge that markets may resolve adversely and that on-chain transactions are irreversible.

Propex does not collect personal data. Wallet addresses and trade history are public on-chain data. The front-end may load third-party RPC endpoints and price feeds; those providers may log requests independently of Propex.