// For KIP-664, DescribeTransactionsRequest describes the state of transactions.
DescribeTransactionsRequest => key 65, max version 0, flexible v0+
  // Array of transactionalIds to include in describe results. If empty, then
  // no results will be returned.
  TransactionalIDs: [string]

// DescribeTransactionsResponse is a response to a DescribeTransactionsRequest.
DescribeTransactionsResponse =>
  ThrottleMillis
  TransactionStates: [=>]
    // A potential error code for describing this transaction.
    //
    // NOT_COORDINATOR is returned if the broker receiving this transactional
    // ID does not own the ID.
    //
    // COORDINATOR_LOAD_IN_PROGRESS is returned if the coordiantor is laoding.
    //
    // COORDINATOR_NOT_AVAILABLE is returned if the coordinator is being shutdown.
    //
    // TRANSACTIONAL_ID_NOT_FOUND is returned if the transactional ID could not be found.
    //
    // TRANSACTIONAL_ID_AUTHORIZATION_FAILED is returned if the user does not have
    // Describe permissions on the transactional ID.
    ErrorCode: int16
    // TransactionalID is the transactional ID this record is for.
    TransactionalID: string
    // State is the state the transaction is in.
    State: string
    // TimeoutMillis is the timeout of this transaction in milliseconds.
    TimeoutMillis: int32
    // StartTimestamp is the timestamp in millis of when this transaction started.
    StartTimestamp: int64
    // ProducerID is the ID in use by the transactional ID.
    ProducerID: int64
    // ProducerEpoch is the epoch associated with the producer ID.
    ProducerEpoch: int16
    // The set of partitions included in the current transaction (if active).
    // When a transaction is preparing to commit or abort, this will include
    // only partitions which do not have markers.
    //
    // This does not include topics the user is not authorized to describe.
    Topics: [=>]
      Topic: string
      Partitions: [int32]