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zkBob AppLinks & Resources
  • 🦹zkBob Overview
    • zkBob
    • Basic Concepts
      • Getting Started
      • Open-Source and Decentralized
      • Multichain Deployment
      • Usage Statistics
      • Use Cases
        • Employee Salary
        • Vendor Purchasing
      • Development Timeline
      • zk Privacy Solution Comparison
    • zkBob Pools
      • USDC Pool on Polygon (sunsets January 31, 2025)
      • USDC Pool on Optimism
      • ETH Pool on Optimism
      • USDT Pool on Tron (sunsets Oct 29, 2024)
    • Fees
      • Unspent note handling
    • Deposit & Withdrawal Limits
    • Compliance & Security
      • TRM Labs Integration
    • Conferences, Workshops, Videos
      • International Videos
    • Governance
    • BOB Stablecoin
    • zkBob FAQ
  • πŸ¦Έβ€β™‚οΈzkBob Application
    • UI Overview
    • Account Creation
      • Login to an existing account
      • Lost Password
      • Metamask / Web3 Wallet Warning
    • Deposits
    • Transfers
      • Multitransfers
    • Withdrawals
      • Native Token Conversion
    • Generate a Receiving Address
    • Optional KYC
    • zkBob Direct Deposits
    • Support ID
    • Payment Links
    • Integrated Services
    • Multilingual support
      • PortuguΓͺs
      • Русский
      • δΈ­ζ–‡
  • πŸ‘©β€βš•οΈTechnical Implementation
    • zkBob Application Overview
    • Deployed Contracts
    • Smart Contracts
      • zkBob Pool Contract
        • Transaction Calldata
      • Bob Token Contract
      • Verifier contracts
      • Operator Manager Contract
        • Mutable Operator Manager
      • Voucher (XP) Token Contract
    • Accounts and Notes
      • Accounts
      • Notes
    • Relayer Node
      • Relayer Operations
      • Optimistic State
      • REST API
    • zkBob Keys
      • Address derivation
      • Ephemeral keys
    • zkSNARKs & Circuits
      • Transfer verifier circuit overview
    • zkBob Merkle Tree
      • The Poseidon Hash
    • Elliptic Curve Cryptography
    • Transaction Overview
      • Common Structure
      • Memo Block
        • Memo Block Encryption
      • Transaction Types
      • Nullifiers
      • Signing a Transaction
      • The Transaction Lifecycle
    • Client Library SDK
      • Configuration
        • Initializing the client
          • Client Configuration
        • Attaching a User Account
          • Account Configuration
        • Switching Between Pools
      • Account-less Mode Operations
        • Converting Token Amounts
        • Transaction Fees
        • Transaction Constraints
        • Using the Delegated Prover
        • Getting the State
        • Gift Cards
        • Client Library Status
        • Helpers
        • Versioning
      • Full Mode Operations
        • Balances and History
        • Shielded Addresses
        • Account State
        • Fee Estimations
        • Transaction Configuration
        • Sending Transactions
        • Transaction Maintenance
        • Direct Deposits
        • Gift Cards Maintenance
        • Ephemeral Deposits
        • Forced Exit
        • Other Routines
      • Common Types
      • Full Functions List
      • Utilities
  • πŸ‘©β€πŸ«Deployment
    • Trusted Setup Ceremony
    • Contract Deployment
    • Relayer Subsystem
  • πŸ‘·β€β™‚οΈRoadmap
    • On the Roadmap
    • Exploratory Features
      • XP (Experience Points)
        • XP-based Auctions
      • Multi-chain Custom Rollup Deployment
      • Round-robin Operator Manager
      • Compounding
  • πŸ§‘β€πŸ’»Jobs
    • Zero-Knowledge Researcher & Protocol Developer
  • 🧩Resources
    • Visual Assets
    • Hackathons
      • zkBob Cloud
    • Release Notes
      • October 11, 2023
      • July 13, 2023
      • June 13, 2023
      • March 28, 2023
      • January 30, 2023
      • January 16, 2023
      • January 2, 2023
      • Releases 2022
    • Security Audit
    • Github
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  1. Technical Implementation

zkBob Application Overview

Main system components

PreviousδΈ­ζ–‡NextDeployed Contracts

Last updated 1 year ago

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Components

.

The zkBob application is comprised of the following components:

  • : The main contract which holds the zero-knowledge state. It's the core solution component. All transactions are sent here.

  • : The BOB token contract, an ERC20-based fungible token with additional features.

  • : An intermediate actor between users and the Pool. The Relayer receives user transactions, calculates zkSNARKs, and sends transactions to the Pool in a serial manner. While users can send transactions directly to the Pool, the collision probability increases (and user transactions can be reverted due to incorrect rollup state), so it makes sense to send to the Relayer.

  • : The contract which manages access to the Pool. It can be used to activate a single relayer for a defined period of time or provide unlimited access to the Pool. It also checks that the fee receiver and relayer are separate entities.

  • : The solution front-end and UI. All transactions are initiated here. The application synchronises a user account with the rollup, and helps to create transactions.

πŸ‘©β€βš•οΈ
View deployed contracts here
zkBob Pool
Bob Token
Relayer
Operator Manager
Application