$ nncp-ack [options] -all
$ nncp-ack [options] -node NODE[,@dots{}]
$ nncp-ack [options] -node NODE -pkt PKT
+
+$ nncp-ack [@dots{}] 4>&1 >&2 | nncp-rm [@dots{}] -pkt
@end example
Send acknowledgement of successful @option{PKT} (Base32-encoded hash)
specified, then acknowledge all packet in node's @code{rx} outbound
spool. If @option{-all} is specified, then do that for all nodes.
+That commands outputs list of created encrypted ACK packets
+(@code{NODE/PKT}) to @strong{4}th file descriptor. That output can be
+passed for example to @command{@ref{nncp-rm}} to remove them after
+transmission to not wait for acknowledgement and retransmission.
+
General workflow with acknowledgement is following, assuming that
Alice has some outbound packets for Bob:
That will also check if copied packets checksum is not mismatched.
-@item Create ACK packets of received ones:
+@item Create ACK packets of received ones, saving the list of encrypted
+ ACK packets:
@example
-bob$ nncp-ack -node alice
+bob$ nncp-ack -node alice 4>acks
@end example
@item Send those newly created packets back to Alice:
@example
-bob$ nncp-xfer -tx /mnt/shared
+bob$ nncp-xfer [-keep] -tx /mnt/shared
+@end example
+
+@item Remove them from outbound spool, because we expect no
+ acknowledgement for them:
+
+@example
+bob$ nncp-rm -node alice -pkt <acks
@end example
@item Get those acknowledgement packets and @ref{nncp-toss, toss} them: