Accounts contain authentication information for a uniquely identified external user of an SDK blockchain,
including public key, address, and account number / sequence number for replay protection. For efficiency,
since account balances must also be fetched to pay fees, account structs also store the balance of a user
Accounts are exposed externally as an interface, and stored internally as either a base account or vesting account. Module clients wishing to add more account types may do so.
0x01 | Address -> ProtocolBuffer(account)
# Account Interface
The account interface exposes methods to read and write standard account information. Note that all of these methods operate on an account struct confirming to the interface - in order to write the account to the store, the account keeper will need to be used.
# Base Account
A base account is the simplest and most common account type, which just stores all requisite fields directly in a struct.
# Vesting Account