What is solana-pumpfun-bundler?

This is a command-line toolkit for launching a new token on Pump.fun, a platform on the Solana blockchain where people create and trade meme coins. The tool automates several steps that would otherwise need to be done manually: uploading the token's metadata and image to storage, sending the on-chain transaction that creates the token, and then immediately buying it from multiple wallets at the same time in a single block. The simultaneous multi-wallet buying is the core feature. It uses a service called Jito, which allows grouping multiple Solana transactions together into a bundle so they all land in the same block. This is used in token launches to acquire supply at the starting price before other buyers can react. The toolkit handles distributing the required funds to each bundler wallet, building an Address Lookup Table to keep the bundle transactions compact, and then sending everything through Jito's block engine. Setup involves cloning the repository, installing Node.js dependencies, and filling in two configuration files: one for network endpoints (your Solana RPC connection, Jito connection, and fee settings) and one for your wallet private keys and token details like name, symbol, description, and logo. The private key files are excluded from version control. Running the tool opens an interactive numbered menu that walks through each step of the launch sequence without requiring any command-line flags. The toolkit is written in TypeScript and runs on Node.js. The README notes that using dedicated hot wallets is advisable and that keeping the settings file out of version control is important for security. It also recommends using an authenticated RPC endpoint to reduce visibility of transactions before they are signed. The README does not describe any testing infrastructure beyond a type check command and a menu smoke test.