Batch Reveal System

🔴 Advanced | 🚀 Advanced

Advanced multi-party batch reveal system with dynamic entries, session management, and single-proof verification

Overview

This advanced example demonstrates a sophisticated batch reveal system for multi-party scenarios. Features include: dynamic entry storage (up to 20 entries), session-based organization with designated organizer, batch submission of multiple entries, atomic reveal of all entries with a single proof, and built-in winner detection. Perfect for sealed-bid auctions, tournaments, salary distributions, and voting systems.

Quick Start

# Create new project from this template
npx labz create advanced-batch-reveal my-project

# Navigate and install
cd my-project
npm install

# Run tests
npx hardhat test

Code Explanation

Create Session

Create a new batch reveal session. The creator becomes the organizer who controls when entries close and reveal happens.

Lines 77-92

Submit Entry

Participants submit encrypted entries to the session. Each entry is stored with FHE.allowThis() for later reveal.

Lines 98-124

Submit Batch

Submit multiple entries in a single transaction. Useful for batch operations like importing data or testing.

Lines 130-156

Close Request

Organizer closes entries and requests reveal. Calls FHE.makePubliclyDecryptable() for ALL entries at once.

Lines 162-184

Get Handles

Get all encrypted handles and participant addresses for off-chain batch decryption with relayer-sdk.

Lines 198-218

Finalize Batch

Finalize with a single proof that verifies ALL entries. One FHE.checkSignatures() call for all values is highly efficient.

Lines 224-264

Find Winner

Helper function to find the winner (highest value) among all revealed entries. Useful for auctions and competitions.

Lines 294-314

FHE Operations Used

  • FHE.fromExternal()

  • FHE.allowThis()

  • FHE.makePubliclyDecryptable()

  • FHE.checkSignatures()

FHE Types Used

  • euint64

  • euint32

  • externalEuint64

  • externalEuint32

Tags

batch reveal multi-party session auction tournament voting lottery threshold organizer entries

Related Examples

Prerequisites

Before this example, you should understand:

Next Steps

After this example, check out:

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