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 Zero-Knowledge
Settlement Layer Solana Mainnet
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.

+ Technical note

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.

+ Technical note

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.

+ Technical note

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.

+ Technical note

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