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json-rpc-engine

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json-rpc-engine

A tool for processing JSON-RPC messages.

  • 6.1.0
  • latest
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  • npm
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What is json-rpc-engine?

The json-rpc-engine npm package is a JavaScript library that provides a framework for building JSON-RPC 2.0 servers and clients. It allows you to create middleware stacks to handle JSON-RPC requests and responses, making it easier to manage and extend your JSON-RPC services.

What are json-rpc-engine's main functionalities?

Creating a JSON-RPC Engine

This feature allows you to create a new JSON-RPC engine instance, which serves as the core component for handling JSON-RPC requests and responses.

const { JsonRpcEngine } = require('json-rpc-engine');
const engine = new JsonRpcEngine();

Adding Middleware

You can add middleware to the JSON-RPC engine to handle specific methods or perform actions before passing the request to the next middleware. In this example, a middleware is added to handle the 'hello' method.

engine.push((req, res, next, end) => {
  if (req.method === 'hello') {
    res.result = 'world';
    return end();
  }
  next();
});

Handling Requests

This feature demonstrates how to handle a JSON-RPC request using the engine. The request is processed through the middleware stack, and the response is returned via a callback function.

const request = { jsonrpc: '2.0', method: 'hello', id: 1 };
engine.handle(request, (err, res) => {
  if (err) {
    console.error(err);
  } else {
    console.log(res);
  }
});

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Package last updated on 20 Nov 2020

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