Optional ReadonlyavailableWhether status() reports the backend as available. Sends are refused while it is not. Defaults to true.
Optional ReadonlynowClock in Unix seconds, for deterministic tests. Defaults to the wall clock.
Optional ReadonlyownerHex public key reported as ownerPubkey and used as the sender of outgoing messages. Defaults to 'owner'.
Options for createMemoryBackend.