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Hardhat is an Ethereum development environment for professionals. It facilitates performing frequent tasks, such as running tests, automatically checking code for mistakes or interacting with a smart contract. Check out the plugin list to use it with your existing tools. Hardhat Runner is the main component you interact with when using Hardhat. It's a flexible and extensible task runner that helps you manage and automate the recurring tasks inherent to developing smart contracts and dApps....

An open-source interface for Uniswap -- a protocol for the decentralized exchange of Ethereum tokens. Developers, traders, and liquidity providers participate together in a financial marketplace that is open and accessible to all. Build Defi apps and tools on the largest crypto project on Ethereum. Get started with quick start guides, protocol documentation, a Javascript SDK, and fully open source code.

x402 is an open, HTTP-native payment protocol designed to enable programmatic, real-time payments directly within standard web requests. It repurposes the long-unused HTTP 402 “Payment Required” status code to allow servers to request payment before delivering content or API responses. The protocol supports multiple payment networks, including blockchain-based systems and fiat-compatible facilitators, making it flexible and network-agnostic. It is particularly suited for machine-to-machine...

...Truffle will manage your entire workflow. Get a deeper understanding of transactions with the Truffle debugger. Step in/out, set breakpoints, and analyze variables through the CLI and the native VS Code debugger. Debug mainnet transactions by stepping through verified contract source code. Truffle will give you the best view into what's happening. Bring up a local blockchain with pre-funded accounts for fast testing with Truffle’s Ganache. Fork mainnet with zero-config, impersonate accounts, auto-mine blocks, and use Ganache programmatically with Node.js. ...