attributes

A map of the attributes requested in <a>ReceiveMessage</a> to their respective values. Supported attributes:

• ApproximateReceiveCount

• ApproximateFirstReceiveTimestamp

• MessageDeduplicationId

• MessageGroupId

• SenderId

• SentTimestamp

• SequenceNumber

ApproximateFirstReceiveTimestamp and SentTimestamp are each returned as an integer representing the epoch time in milliseconds.