PRE-LAUNCHNo contracts · no wallet connection · no paid play

FAIRNESS FILE

Nobody should know first.

SCRATCHIES plans a dual-commit reveal: operator seed-chain material XOR a future chain blockhash, committed when scratching starts. This is a design claim, not deployed proof.

Planned invariant

Before scratch initiation, a sealed ticket carries no determined outcome. After initiation, transfer locks while the settlement input matures. Neither holder nor operator should be able to selectively reveal only winners.

Publication standard

  • Exact verifier source and deterministic test vector.
  • Seed commitment, target block, inputs, output, and receipt.
  • Failure and expiry handling visible before paid play.
  • Verified contract source and admin-power disclosure.