Operations

An operation queries or updates the database state.

There are six operations available to clients:

• create_accounts: create Accounts
• create_transfers: create Transfers
• lookup_accounts: fetch Accounts by id
• lookup_transfers: fetch Transfers by id
• get_account_transfers: fetch Transfers by debit_account_id or credit_account_id
• get_account_balances: fetch the historical account balance by the Account's id.

Events and Results

Each operation has a corresponding event and result type.

• The client sends events to the cluster.
• The client receives results from the cluster (1:1 for each event sent).
• Events and results for the same operation are batched for throughput.
• A batch of an operation's events is called a request.
• A batch of an operation's results is called a reply.

Client implementations provide an API for sending batched events and decoding the corresponding batched results.

Operation	Event	Result
create_accounts	Account	CreateAccountResult
create_transfers	Transfer	CreateTransferResult
lookup_accounts	Account.id	Account or nothing
lookup_transfers	Transfer.id	Transfer or nothing
get_account_transfers	AccountFilter	Transfer or nothing
get_account_balances	AccountFilter	AccountBalance or nothing