@startuml
title "Crypto Wallet Process(1),(2)"

boundary User_Page as up
participant Frontend_Server as fe
participant Backend_Server as be
database Prod_database as db
database Remote_database as udb

participant Ethereum_Geth as geth


autonumber

note over up
(1) GetBalance
(/dangnn-wallet-balance)
end note

up->fe: Wallet Account Page

fe->be: loggin user id
be->db: find wallet record 
db->be: wallet accout addr
note over be: Call Geth fuction 
be->geth: request account balance
geth->be: accout balance
be->fe: current accout balance
fe->up: show account balance

note over up:
note over up:
autonumber

note over up
(2) Create Wallet
/dangnn-wallet-create
end note

up->fe: create wallet

fe->be: loggin user id

note over be: Call Geth Create Wallet
be->geth: create wallet
geth->be: private_key & account addr

note over be
(1) get encryption key
(2) with DB connection string Hash
end note

be->udb: request AES-256 encryption key\n with SHA-256 Hash conn string
udb->be: AES-256 encryption key
note over be : encrypt Private_key\nwith AES encrypt key

be->db: save encrypted private key & account addr
db->be: save OK
be->fe: request OK
fe->up: show creation OK
@enduml