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Vistadex is a prediction market platform for viewing and trading supported markets across venues through one account. Vistadex currently supports markets sourced from Polymarket and Kalshi.
Vistadex architecture: Users submit orders via the Vistadex API, which routes to the OrderService. Fillers compete in an auction, and the winning bid is settled on-chain via Vistadex Exchange smart contracts on Solana.

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Cross-venue matching

Vistadex designates a reference platform for each market. The reference market supplies the market question, resolution criteria, and final outcome that Vistadex follows. When you enter a valid amount, Vistadex automatically requests quotes through an auction. Fillers can use supported liquidity sources and routing strategies to compete for the order. The best valid quote is shown in the trading panel for review.

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Trade lifecycle

  1. Choose a market, outcome, and buy or sell direction.
  2. Enter an amount. Vistadex automatically runs an RFQ auction.
  3. Select Trade when a quote is available, then review the exact rate and amounts.
  4. Confirm the trade. The embedded wallet signs the server-built Solana transaction.
  5. The winning filler completes the settlement and Vistadex reports the result.
The web app currently supports market orders. The Limit choice is visible in the order-type menu but disabled.

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Resolution

After the designated reference market finalizes its resolution, Vistadex records the corresponding outcome on Solana. Winning positions then become redeemable for their finalized payout. See Resolution for details.