A live version of the sharecoin-timelock-vault.py commit-then-reveal
pattern: bid amounts stay hidden as hashes until a future block confirms, then everyone reveals.
Fits sealed-bid auctions, freight-tender bidding, or any "nobody should see others' numbers before
the deadline" situation.
Honest limitation: this proves the reveal happened after the target block, since anyone can check when that block was actually mined, it does not stop this server from being run by someone who peeks at all commitments before the deadline. Real cryptographic timelock encryption (where the key itself is inaccessible until the condition is met) would need identity-based encryption schemes this beacon doesn't provide. See BEACON-SPEC.md.
Creating an auction locks in the current block height as the commitment deadline reference. Share the resulting link with bidders, each of them submits a sealed bid (a hash, not the real amount) against it.