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Introduction

What is the Lollipop Protocol?

The Lollipop protocol is a cross chain protocol that allows different blockchains to pull account and transaction information from eachother.

Architecture

Architectural Diagram

There are five main components to the architecture:

  1. Geyser
  2. Apache Kafka
  3. Account Analyzer
  4. Redis
  5. REST API

At a highlevel, Solana account data is pulled from a Geyser and sent to a Kafka instance. The Account Analyzer is an ETL that extracts the account data from Kafka, transforms it, and loads it into a Redis. The data in the Redis is then exposed via a Rest API.

Geyser​

Geyser is Solana node plugin responsible for feeding Kafka with new account states. You can read more about it here

Kafka​

Kafka is an open source message broker. It enables different components within a system to communicate with eachother by persisting and routing messages between components.

Account Analyzer​

Accounts Analyzer fetches account states from Kafka, deserializes them, and then transforms and pushes them to the ClickHouse database. It is a classic ETL module.

For now it supports Metaplex Metadata, SPL token and SPL mint accounts.

Redis​

Redis is an open source (BSD licensed), in-memory data structure store used as a database, cache, message broker, and streaming engine. Redis provides data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes, and streams. Redis has built-in replication, Lua scripting, LRU eviction, transactions, and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.

REST API​

The REST API allows end users to read data from the Redis. The REST API written in Rust. Details about endpoints you can find in API Documentation.