OptionalaccountsOptionalfeaturesWhat the simulated provider declares. Default with accounts: every feature and duration.
OptionallatencyAwaited before each call is answered, so a test can hold one account's answer and release it later.
OptionalnowClock in UTC seconds for snapshots, executions, history and expiry. Default Date.now() / 1000.
Enables account ledgers. Omitted keeps the original book-only simulation.