MigrationResponse

Field

Type

Description

payload

bytes

Opaque; empty when the verb returns nothing.

refused

string

Non-empty = this node refuses, and the reason is for a human. A refusal is always answered BEFORE anything irreversible has happened.

migration_id

string

Correlation. A node answers verbs out of order — ready waits for a segment and an abort may overtake it — so a response has to name the request it answers, which the design’s two fields alone cannot do.

verb

string

The verb this answers, as its proto field name (get_state, ready, …​).