Crypto App developed for Android to read public keys from a variety of API's Libraries: datetime: https://docs.python.org/3/library/datetime.html requests: https://docs.python-requests.org/en/latest/ json: https://docs.python.org/3/library/json.html Bitcoin: https://blockchain.info/api/q Ethereum: https://www.blockcypher.com/dev/ethereum/#txskeleton Solana: https://docs.solana.com/developing/clients/jsonrpc-api Binance Smart Chain: