Variables
Const ACCOUNT_DOMAIN_SEPERATOR
ACCOUNT_DOMAIN_SEPERATOR: "\naccount-id" = '\x0Aaccount-id'
Const DERIVATION_PATH
DERIVATION_PATH: "m/44'/223'/0'/0" = "m/44'/223'/0'/0"
Const HARDENED_OFFSET
HARDENED_OFFSET: 2147483648 = 0x80000000
Const SUB_ACCOUNT_ZERO
SUB_ACCOUNT_ZERO: Buffer = ...