dApp Engine

App Engine is a Go application designed to simplify and enhance blockchain interactions on EVM-compatible chains. It aims to create great user experiences on EVM-compatible blockchains by providing a unified solution for reading and writing data, as well as handling event-based interactions.

Purpose

Engine addresses several key challenges in blockchain development:

1. Simplified Transactions: Submitting abstracted transactions (user operations) becomes easier.
2. Chronological Data Reading: Efficiently read data in chronological order from the blockchain.
3. Event Handling: React to on-chain events through WebSockets (for application displays) or webhooks (for system responses).
4. Data Enrichment: Attach additional off-chain data to enhance use cases (e.g., transaction descriptions for ERC20 transfers).
5. Real-time Interaction: Make transactions and their data available before they are confirmed on-chain, enabling immediate user feedback and interaction.

Features

• Bundler
  • RPC calls through REST Endpoints
    • pm_sponsorUserOperation
    • pm_ooSponsorUserOperation
    • eth_sendUserOperation
    • eth_chainId
  • RPC calls through WebSocket
    • pm_sponsorUserOperation
    • pm_ooSponsorUserOperation
    • eth_sendUserOperation
    • eth_chainId
• Smart Contract Logs
  • Endpoints
    • Fetch in a date range
  • WebSocket
    • Listen by Contract + Event Signature + Data (optional)
    • Listen by Contract + Event Signature + Data OR Data (optional)
  • Indexing
    • Listen by Contract + Event Signature
  • Mechanism to automate requests to start indexing
    • Manually for system admins
    • By listening to a Smart Contract (people could pay to start indexing)
  • Allow attaching extra data to a log
  • Store in DB
    • Hash
    • Created at
    • Sender (used to determine if modifying extra data is allowed)
    • Destination Contract Address
    • Amount
    • Status
    • Topics (as JSON)
    • Extra Data (as JSON)
  • Webhooks (make a network request based on an event being triggered)

About Citizen Wallet

Citizen Wallet is an open-source project focused on improving blockchain user experiences. Engine is a core component of this ecosystem.

• Website: https://citizenwallet.xyz
• Discord: https://discord.citizenwallet.xyz
• X: @citizenwallet

Join our community to contribute, ask questions, or learn more about the project!