🦄 Gasless ERC20 swap settlement protocol 🦄

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

Uniswap's Universal Router for NFT and ERC20 swapping

Add card payments from Zettle to your own app

Examples from the official PayPal Developer Docs

Wallet CLI

SPV FairCoin C library

nopCommerce plugin for cash on delivery(payments)

Payment plugin for PayPal Smart Buttons (payments)

Generates lot of keys with single entropy file

Warp - Bringing Solidity to Starknet at warp speed. Warp is a Solidity to Cairo Compiler, this allows teams to write/migrate Solidity to Cairo for easy onboarding into the StarkNet ecosystem.

iOS and macOS SDK for communicating with OAuth 2.0 and OpenID Connect providers.

Build your first app on Optimism!

https://contracts.synapseprotocol.com/bridge

Synapse Protocol's NodeJS SDK

Synapse Protocol's REST API

A library for validating US bank account routing and account numbers

Git Source Code Mirror - This is a publish-only repository but pull requests can be turned into patches to the mailing list via GitGitGadget (https://gitgitgadget.github.io/). Please follow Documen…

Braintree SDK for iOS

Web application fuzzer

Example builder

MEV-Boost allows Ethereum validators to source high-MEV blocks from a competitive builder marketplace

Go implementation of the Ethereum protocol

PayNow - Create payment links, get paid in tokens

Decompiler at the heart of Eveem.org

Beaconchain Dashboard is an open source ethereum validator performance tracker app for Android and iOS.

A collection of configs for all the ethereum merge testnets

This repository offers a collection of standalone Tenderly integration examples, catering to diverse use cases, to jumpstart your projects.