PowerSync is a Postgres-SQLite sync engine, which helps developers to create local-first real-time reactive apps that work seamlessly both online and offline.

PowerSync Service

powersync-service is the monorepo for the core PowerSync service.

The service can be started using the public Docker image. See the image notes

Monorepo Structure:

Packages

• packages/service-core

  • Core logic for the PowerSync backend server

• packages/jpgwire

  • Customized version of pgwire

• packages/jsonbig

  • Custom JSON and BigInt parser

• packages/rsocket-router

  • Router for reactive streams using RSocket

• packages/sync-rules

  • Library containing logic for PowerSync sync rules

• packages/types

  • Type definitions for the PowerSync service

Libraries

• libs/lib-services

  • A light-weight set of definitions and utilities for micro services

Service

• service

Contains the PowerSync service code. This project is used to build the journeyapps/powersync-service Docker image.

Docs

• docs

Technical documentation regarding the implementation of PowerSync.

Test Client

• test-client

Contains a minimal client demonstrating direct usage of the HTTP stream sync API. This can be used to test sync rules in contexts such as automated testing.

Developing

See the notes for local development instructions.