Storage Adapters

Coco is built in a platform agnostic way. As we can not assume anything about the presence of a certain storage API (e.g. IndexedDB), coco exposes a storage interface that needs to be satisfied when instantiating.

const repo = new ExpoSqliteRepositories({ database: db }); // Implements the Repositories interface
await repo.init(); // Ensures schema and applies migrations
const coco = await initializeCoco({
  repo, // <-- pass the storage implementation
  seedGetter,
  // other params
});

Some storage implementations are maintained as part of the cashubtc/coco repository, but technically you can use any class that implements the Repositories interface.

coco-cashu-indexeddb

Implements Repositories using the IndexedDB Browser API.

Installation:

npm i coco-cashu-indexeddb

Usage:

import { initializeCoco } from 'coco-cashu-core';
import { IndexedDbRepositories } from 'coco-cashu-indexeddb';

const repo = new IndexedDbRepositories({ name: 'your-db-name' });
const coco = await initializeCoco({
  repo,
  seedGetter,
});

coco-cashu-expo-sqlite

Installation:

npm i coco-cashu-expo-sqlite
# coco-cashu-expo-sqlite expects an Expo SQLite client to be passed
npx expo install expo-sqlite

Usage:

import { initializeCoco } from 'coco-cashu-core';
import { ExpoSqliteRepositories } from 'coco-cashu-expo-sqlite';
import { openDatabaseAsync } from 'expo-sqlite';

// First we create an expo-sqlite client
const db = await openDatabaseAsync('coco-demo.db');
// Then we pass it to our storage implementation
const repo = new ExpoSqliteRepositories({ database: db });
const coco = await initializeCoco({
  repo,
  seedGetter,
});

coco-cashu-sqlite3

Installation:

npm i coco-cashu-sqlite3
npm i sqlite3

Usage:

import { initializeCoco } from 'coco-cashu-core';
import { SqliteRepositories } from 'coco-cashu-sqlite3';
import { Database } from 'sqlite3';

// First we create a sqlite3 client
const db = new Database('./test.db');
// Then we pass it to our storage implementation
const repo = new SqliteRepositories({ database: db });
const coco = await initializeCoco({
  repo,
  seedGetter,
});