Porter is part of Hodler-Wallet, Porter is an auxiliary tool of Hodler application.
It can exchange information with Hodler application,
assist in transmitting crypto address and crypto transaction.
Porter itself does not store any private key, only the address,
and obtains the address related information by calling the crypto related service interface on the Internet.
The main function of Porter is to generate transactions by address,
and then transmit them to the Hodler application by QR code.
Hodler uses the corresponding private key to sign the transactions,
and then transmits them to Porter by QR code also.
Porter broadcasts the signed transactions to the blockchain to complete the transactions.