Aucta Aucta
Aucta

Private Bids.
Public Results.

Sealed-bid auctions on Solana where bidder privacy is cryptographic. Submit confidential bids. Reveal public outcomes. No data leaks, no front-running.

Launch App View Flow
Auction Mode Sealed Bid
Privacy Mode On
Settlement Layer Solana Devnet
Live Auction — #2405 Active
Item
Leica M11 — Edition
Serial #4829 · Chrome Finish
Current Bid ● ● ● ● ●
Bid Count 12
Time Remaining 04:22:18
Privacy: Bid amounts encrypted Settlement: Public on-chain
Privacy Model Sealed Bid Bids encrypted until auction close. No premature visibility.
Identity Wallet Native Connect any Solana wallet. No registration or KYC.
Settlement On-Chain Public Winner and price published on Solana. Fully auditable.
Flow 4-Step Atomic Create, deposit, bid, settle. No manual intervention.
Process

How It Works

01

Create Auction

Public

Define item, reserve price, and duration. Publish on-chain. All terms visible to participants.

Auction PDA initialized with parameters hashed and stored on Solana program.

02

Deposit Collateral

Public

Bidders lock fixed collateral to participate. Prevents spam and ensures commitment.

Collateral escrow held by program authority. Refunded automatically to non-winners.

03

Submit Private Bid

Private

Bid amount encrypted. Only the commitment hash lands on-chain. No one sees your offer.

Pedersen commitment scheme ensures bid secrecy until reveal phase.

04

Settle Public Result

Public

After close, bids decrypt. Winner and price published on-chain. Refunds distributed automatically.

Zero-knowledge proof verifies correct decryption without exposing losing bids.

Product Surfaces

The System

01 — Configuration

What gets configured

Set item details, reserve price, collateral requirements, and auction duration. All parameters committed on-chain before bidding opens.

New Auction Draft
Item Name Leica M11 Edition
Reserve Price 45.0 SOL
Duration 72 Hours
Collateral Required 2.0 SOL per bidder
Publish Auction
02 — Live Auction

What stays private during bidding

Bidders see auction status, timer, and participant count. Bid amounts remain encrypted. No one can infer rankings or values until close.

Auction #2405 — Live Bidding Open
Participants 12
Bid Count 8
Highest Bid ●●●●●
Time Left 14:32:09
Encrypted bids: 8 commitments on-chain Decryption: After close
03 — Settlement

What becomes public at settlement

Winner identity and final price published on-chain. Losing bids stay private. Refunds execute automatically via program instruction.

Auction #2405 — Settled Complete
Winning Bidder 7xK9...3F2a
Final Price 62.5 SOL
Total Bids 8
Refunds 7
Tx Signature 5Kj3...9Lm2
Privacy Boundary

Public vs Private

Public — On Chain
Item details and description
Reserve price
Auction timer and status
Total bid count
Final winner address
Final settled price
Transaction signature
Private — Encrypted
Individual bid amounts
Losing bidder identities
Refund transaction details
Local bid state before reveal
Bid ranking during auction
Bidder deposit timing
Commitment randomness
Get Started

Run a Private Auction

Deploy a sealed-bid auction in minutes. No setup fees. No trusted intermediaries.

Launch App View Demo Flow