v1

Timestamp

Timestamp represents a point in time.

Name
`seconds`	`int64` seconds is the number of seconds since Unix epoch.
`nanos`	`int32` nanos is the non-negative fractions of a second.

ValidationFailure

ValidationFailure describes a single field-level validation error.

Name
`field`	`string` field is the dot-separated path of the field that failed validation.
`reason`	`string` reason is a human-readable explanation of the violated constraint.

Recipient

Recipient identifies who should receive a notification.

Name
`user_id`	`string` user_id is the internal identifier of the user.
`email`	optional `string` email is the recipient’s email address.
`phone`	optional `string` phone is the recipient’s phone number in E.164 format.

DeliveryStatus

DeliveryStatus represents the delivery state of a notification.

Value	Description
`DELIVERY_STATUS_UNSPECIFIED`	DELIVERY_STATUS_UNSPECIFIED is the default unspecified status.
`PENDING`	PENDING means the notification has been queued but not yet delivered.
`DELIVERED`	DELIVERED means the notification was successfully sent to the recipient.
`FAILED`	FAILED means the delivery attempt failed.
`READ`	READ means the recipient has read the notification.