Subscription-Oracle Template

Help data provider creating subscription Oracle's Endpoint

Introduction

Subscription oracle template serves as bootstrap tool for data provider to setup and run their service in minutes.

Purpose : to provide a subscription service based on Zap oracle platform to manage subscriptions and distribute information through authenticated websocket connections.

Work flow

This workflow has been provided in the template , following information explains how things works within source code

ORACLE

Requirements

• Oracle is registered and created an endpoint with curve set for a subscription service (not to be queried)

• Node/Yarn installed

• Modify Config.ts with your custom information such as Mnemonic and optional custom URL for parity node ( default to infura)

• Method getData needs to be implemented to get data from database or other source and emit data to authenticated connections,

How it works

• Oracle creates authenticated websocket server

• Oracle run yarn server which will start listening to connections, verify user and emitting data to connected users

Dont have Oracle and Endpoint registered ? You can easily do so in couple provided tools:

• Zap Admin

• Zap-term

Integrate into your application :

@zapjs/provider

USER

This template also includes bootstrap for user to use their Ethereum address to authenticate and connect to receive data from this type of subscription Oracle's endpoint.

Requirements

• User approve -> bond -> subscribe to Oracle's endpoint

How it works

• User connect to server websocket with params:

  • {

  • signature: {{sign endpoint's name with user's address}},

  • endpoint: {{endpoint name}},

  • address: {{user's address}}

  • }

• After successful authenticated, user will be able to connect with websocket until the block remaining subscriptions is 0

• User listen to channel signalData from Oracle and receive data

Use our tools to easily approve, bond, subscribe to Oracles Endpoint

UI /Terminal

• Zap Admin

• Zap-term

Integrate into your application :

• @zapjs/subscriber

Setup

• yarn

• Create priv_config.ts based on config.ts template with oracle's information

• In src/server.ts modify method getData to get custom data of your own. This data will be broadcasted to users

Run Server:

• yarn server

User Connecting to server:

• In src/user.ts modify signature, address and endpoint

• yarn user

Source Code