orbitdb/orbit-db-eventstore

Append-Only Log database for orbit-db

orbit-db-eventstore

Append-Only Log database for orbit-db

An append-only log with traversable history. Useful for "latest N" use cases or as a message queue.

Used in orbit-db.

Table of Contents

• Install
• Usage
• API
• Contributing
• License

Install

This project uses npm and nodejs

npm install orbit-db ipfs

Usage

First, create an instance of OrbitDB:

import * as IPFS from 'ipfs'
import OrbitDB from 'orbit-db'

const ipfs = new IPFS()
const orbitdb = await OrbitDB.createInstance(ipfs)

Get a log database and add an entry to it:

const log = await orbitdb.eventlog('haad.posts')
log.add({ name: 'hello world' })
  .then(() => {
    const items = log.iterator().collect().map(e => e.payload.value)
    items.forEach(e => console.log(e.name))
    // "hello world"
  })

Later, when the database contains data, load the history and query when ready:

const log = await orbitdb.eventlog('haad.posts')
log.events.on('ready', () => {
  const items = log.iterator().collect().map(e => e.payload.value)
  items.forEach(e => console.log(e.name))
  // "hello world"
})

See example/index.html for a detailed example. Note that to run this example, you need to have a local IPFS daemon running at port 5001.

API

See orbit-db's API Documenations for full details.

Contributing

If you think this could be better, please open an issue!

Please note that all interactions in @orbitdb fall under our Code of Conduct.

Note that tests for this module are in the orbit-db repository.

License

MIT © 2016-2020 Protocol Labs Inc., Haja Networks Oy