Provably fair
- When a raffle is created we lock in a secret seed and publish its hash right away, so the seed can not be changed later.
- When the raffle is drawn, the list of entries is locked first. The winners then come from three things: that seed, the list, and a public random number from the drand network that is only published a few seconds later.
- Nobody controls all three. After the draw the seed is published, and anyone can redo the math.
Save it now. After the draw, the result shows the seed, and its hash must match this.
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