— Sealed-bid auctions

Highest wins. Losers learn nothing.

Bids encrypted on submission. Compared on ciphertext. Only the winning amount and bidder ever decrypted on chain.

Privacy Report

How Sealed-Bid Auctions keeps your data confidential

View contract →

— Encrypted

  • •Every bid amount (euint128)
  • •Bidder identity until reveal (eaddress)
  • •Highest bid + bidder tracked entirely on ciphertext
  • •Losing bids — never decrypted, ever

— Visible on-chain

  • •Number of bids placed (count only, no amounts)
  • •Auction deadline + anti-snipe extensions
  • •Token being auctioned + payment token

— What leaks

  • Nothing leaks.
— Privacy lens · sample sealed-bid auction
What each role sees about a sealed auction
OBSERVER VIEW
Auctioned token + amount
1000 CDEX
Your bid amount
🔒 sealed (only the winning amount is published)
Other bidders' amounts
🔒 sealed (losing bids never decrypt — ever)
Winner + price (after reveal)
Pending reveal
— Wallet required

Connect your wallet

Create auctions, place sealed bids, and discover winners — all with fully encrypted bid amounts via FHE.