npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

express-multichain-gas-estimation-middleware

v1.0.0

Published

Express.js middleware for estimating gas costs of EVM transactions.

Downloads

1

Readme

EVM Gas Estimation Middleware for Express.js

This middleware provides functionality to estimate gas costs of EVM transactions in Express.js applications. It integrates with the multichain-evm-gas-estimator package to accurately estimate gas costs based on provided transaction details.

Installation

To install the EVM Gas Estimation Middleware, you can use npm:

npm install express-multichain-gas-estimation-middleware

Usage

  1. Import the EVM Gas Estimation Middleware into your Express.js application:
const express = require("express");
const app = express();
const gasEstimationMiddleware = require("express-multichain-gas-estimation-middleware");

// Middleware to parse JSON requests
app.use(express.json());

// Use EVM Gas Estimation Middleware
app.use(gasEstimationMiddleware);

// Route to handle incoming EVM transaction requests
app.post("/transaction", (req, res) => {
  // Access gas estimation data from the request object
  const gasEstimation = req.EVMGasEstimation;

  // Respond with gas estimation data
  res.status(200).json({ gasEstimation });
});

// Start the server
const PORT = process.env.PORT || 9000;
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});
  1. Send POST requests to the /transaction endpoint with EVM transaction details in the request body. The middleware will estimate gas costs and attach the estimation data to the request object. The route handler can then access this data and respond accordingly.

Middleware Documentation

The EVM Gas Estimation Middleware is designed to estimate gas costs for EVM transactions. Here's how it works:

  • The middleware intercepts incoming requests to your Express.js application.
  • It extracts EVM transaction details from the request body, including the chain, Infura API key, transaction details (txDetails), and gas unit (unit).
  • Using the multichain-evm-gas-estimator package, it estimates the gas cost for the transaction.
  • The gas estimation data is attached to the request object as req.EVMGasEstimation.
  • The middleware handles errors during gas estimation and responds with a 500 status code and an error message if necessary.

Contributions and Issues

Feel free to contribute to this project or report any issues on the GitHub repository.

License

This project is licensed under the MIT License. See the LICENSE file for details.


This README provides an overview of the EVM Gas Estimation Middleware and demonstrates how to integrate it into your Express.js applications for accurate gas cost estimation in EVM transactions.