Raffle Design Preview

A future production deployment is designed to store each purchase as a contiguous one-based ticket range [ticket_start, ticket_end_exclusive). This local build keeps preview ranges only in browser storage.

The preserved Anchor design targets Switchboard On-Demand VRF for a production draw. This build does not request a VRF value or create a public randomness transaction.

The planned on-chain formula is winning_ticket = (random_value % total_tickets_sold) + 1. The local preview can demonstrate this rule, but its values are not authoritative or independently verifiable.

The production design would walk forward from a collision until it finds an unwon ticket. The logic is documented so a deployed program and public data can be audited later.

A live deployment would require NFT, SPL-token, or SOL prizes to be escrowed before paid entry opens. This preview does not custody assets or create escrow accounts.

The preserved program design includes cancellation and buyer refunds. Local preview refunds only update the browser’s saved demo state and do not move USDC.