Fingerprint · locked when the raffle was created

44ba624804c3dceacd424ab48ff9109b0d8571fae9c206dcb1ca3dd79d5c9589

Seed

3ef80e87c604fa84255daf2ff5672972407a65327cbd666d8249d263d8afafbc

Draw steps

draw-1 · picked 4 from 20 entries

reroll-1 · host replaced 1 winner(s), the seed picked 1 from 16 remaining

reroll-2 · host replaced 2 winner(s), the seed picked 2 from 16 remaining

Check it yourself

This runs the whole draw again in your browser and compares the result. Nothing is sent anywhere.

How it works

When the raffle was created we picked a secret 32 byte seed and published its sha256 fingerprint above. Changing the seed later would change the fingerprint.

Each draw step sorts the entries by id, writes each one as id:tickets, and hashes the list. Random numbers come from sha256(seed:list hash:step label:counter), 52 bits at a time, and a pick lands on an entry in proportion to its tickets.

Once winners are announced the seed is published. The button above checks the fingerprint and re-runs every step. Rerolls are their own steps: the host chooses who to replace, the seed chooses who replaces them.