This JavaScript library provides a simple API to submit and retrieve user data to the Subspace network. The project is in active development with a live test network designed to provide scalable and distributed archival storage.

The Storage API exposes a Subspace node feature called pallet-object-store that implements RPC methods to store an Object from user-provided data. The user can send a simple text or even a file; the pallet-object-store receives an Object to store and generate an objectId.

• put: Receive a signed transaction containing an Object to store. It emit a DataSubmitted Event with an objectId to get the Object from the network.

• findObject: Receives an objectId to find the related Object stored, if it exists this method will return the Object data.

To expose these methods, this library implements two main classes:

• Identity: Class to load a keyPair from different sources. An instance of this class is required to create a SubspaceClient.

  • fromWeb3: Load keyPair from web3Accounts using @polkadot/extension-dapp.

  • fromUri: Load keyPair from a secret URI, Example: //Alice///password or a mnemonic phrase.

• SubspaceClient: Class that loads an Identity instance and creates providers to interact with the network.

  • connect: Create an ApiPromise and WsProvider, returning a SubspaceClient instance ready to call:

    • putObject: Receives an Object as Uint8Array, it create and submit a signed put transaction and return an objectId.

    • getObject: Receives an objectId calling findObject to return the Object as Uint8Array.

Please, note that object will be retrievable after it is archived on the blockchain, it won't be available right away. Archiving takes 100-120 blocks to complete. Caching mechanism for faster retrievability will be introduced soon

Clone this repository:

• git clone https://github.com/subspace/subspace.js.git

Install dependencies

• npm ci

Build the library.

• npm run build

// Import the library.
import { SubspaceClient, Identity } from "@subspace/subspace";

// Generate an Identity from node.js
const identity = await Identity.fromUri(mnemonic);
// Generate an Identity from broser using web3Account (injected by extension)
const identity = await Identity.fromWeb3();

// Generate a SubspaceClient and connect to node and farmer rpc endpoints.
const subspaceClient = await SubspaceClient.connect(
  identity,
  NODE_WS_PROVIDER,
  FARMER_WS_PROVIDER
);

// Put the file as (Uint8Array) in to the objectStore and return the objectId
const objectId: string = await subspaceClient.putObject(objectData);

// Using the objectId get the file as (Uint8Array) from the objectStore.
const object: Uint8Array = await subspaceClient.getObject(objectId);

• Check the examples folder for node.js and browser.

  • node.js.
  • dapp.
  • html.

You can check the Subspace repository to learn how configure and run your local network.

Make sure you have Node RPC and Farmer endpoints exposed