What is solana-pumpfun-bundler?

This is a TypeScript command-line toolkit for launching tokens on Pump.fun, a platform on the Solana blockchain where people create and trade meme coins. The tool automates coordinated token launches by grouping multiple buy transactions from different wallets into a single block using a service called Jito. The README explains that the first few blocks after a token launches often determine who holds most of the supply, so buying from multiple wallets simultaneously at launch is the core use case. The launch process follows a fixed sequence. First the tool runs a simulated dry run of the creation transaction to check it would succeed before spending real funds. Then it uploads the token's name, symbol, description, and image to storage on Pump.fun. Next it sends the on-chain transaction that creates the token. After that it distributes the Solana cryptocurrency to the bundler wallets that will make the simultaneous purchases. It then builds an Address Lookup Table, a structure that makes the bundle transactions more compact, and finally sends all the buys as a single Jito bundle. After launch there are also options to gather funds back from the bundler wallets and sell positions. Configuration requires two files that are excluded from version control: one for network endpoints (the Solana RPC connection, Jito connection, and fee settings) and one for wallet private keys and token metadata. An interactive numbered menu guides the user through each step without requiring command-line flags. The README includes a security section recommending the use of dedicated wallets rather than main holdings wallets, using an authenticated RPC endpoint to avoid broadcasting unsigned transactions to potential snipers, and testing on the Solana test network before a real launch. The project is licensed under ISC. The disclaimer notes that bundled buys may be subject to platform rules and local laws and that the authors are not liable for losses or failed transactions.