tonydev18/walletgen ? reverse-engineered prompt

Build me a cross platform C++ desktop app called WalletGen that can generate crypto seed phrases and private keys, then check whether the derived Bitcoin and Ethereum style wallets have any balance.

I want it to work on Windows, macOS, and Linux, with a simple command line or menu based interface that lets a user generate wallets, search for wallets with balance using either live blockchain lookup or a local database, and recover a Bitcoin wallet from a 12 word seed phrase. For recovery, let the user enter missing words with a star symbol and search through the possible matches until it finds a valid wallet. It should support the common Bitcoin address types like legacy, SegWit, and P2SH, and also EVM chains like Ethereum, BNB, and Matic.

Make it fast and multithreaded, save any found results to a file, and stop as soon as a match is found. If you need current library or build details, look them up online and then wire up the project cleanly so I can build it with make.