2dup c:hash + >r >date r> quick-verify-sig ;
: pk-date? ( addr u -- addr u' flag ) \ check only the date
    dup sigpksize# u< IF  sig-unsigned  EXIT  THEN
    check-date ;
: pk2-sig? ( addr u -- addr u' flag )
    dup sigpk2size# u< IF  sig-unsigned  EXIT  THEN
    2dup sigpk2size# - + >r c:0key 2dup sigsize# - c:hash r> date-sig? ;
: pk2-date? ( addr u -- addr u' flag )
    dup sigpk2size# u< IF  sig-unsigned  EXIT  THEN
    check-date ;
: sig-params ( -- sksig sk pk )
    my-key? ?dup-IF
	>o ke-sksig sec@ drop ke-sk sec@ drop ke-pk $@ drop o>  EXIT
    THEN  !!FIXME!! ( old version ) sksig skc pkc ;
: pk@ ( -- pk u )
    my-key? .ke-pk $@ ;
: sk@ ( -- sk u )

\ convention:
\ '!' is a key revocation, it contains the new key
\ Tags are kept sorted, so you'll get revocations first, then net2o and IPv6+4
\ Symbolic name may start with '@'+len followed by the name

Variable host$
$40 Constant max-host# \ maximum allowed size of a hostname is 63 characters

: get-host$ ( -- )
    max-host# host$ $!len
    host$ $@ gethostname drop host$ $@ drop cstring>sstring host$ $!len drop ;
: skip.site ( -- )
    host$ $@ s" .site" string-suffix? IF
	host$ dup $@len 5 - 5 $del
    THEN ;
: replace-host ( -- )
    config:orighost$ $@ host$ $@ str=
    config:host$ $@len 0> and  IF

}scope

key-entry-table $save

' context-table is gen-table

: key:nest-sig ( addr u -- addr u' flag )
    no-ed-check? IF  pk2-date?  ELSE  pk2-sig?  THEN  dup ?EXIT drop
    2dup addnick-owndht
    2dup + sigsize# - sigsize# >$
    sigpk2size# - 2dup + keysize2 key?new n:>o $> ke-selfsig $!
    sim-nick! off c-state off sig-ok ;
' key:nest-sig key-entry to nest-sig

key-entry-table @ sample-key .token-table !

: .ihaves ( -- )
    ." ====== hash owend by ======" cr
    have# [: dup $@ 85type ." :"
	cell+ $@ bounds U+DO
	    space I $@ .@host.id
	cell +LOOP cr ;] #map ;

: check-ihave ( sig u1 hash u2 -- sig u1 hash u2 )
    c:0key 2dup c:hash 2over  dup sigpksize# u< IF  sig-unsigned !!sig!!  THEN
    2dup sigpksize# - 2dup c:hash + date-sig? !!sig!! 2drop ;
: gen-ihave ( hash u1 -- sig u2 )
    c:0key c:hash host$ $@ 2dup c:hash [: type .pk .sig ;] $tmp ;

: msg:ihave ( id u1 hash u2 -- )
    fetch( ." ihave:" 2over .@host.id 2dup bounds U+DO
    forth:cr I keysize 85type keysize +LOOP forth:cr )
    2over 2over >mehave ihave[] $[]+!
    bounds U+DO  2dup I keysize have# #!ins[]  keysize +LOOP  2drop ;
: >ihave ( hash u -- )
    0 .pk.host 2over  msg:ihave  2drop ( >send-have ) ;

    parent .wait-task @ ?query-task over select event> ;
+net2o: msg-last? ( start end n -- ) \g query messages time start:end, n subqueries
    64>n msg:last? ;
+net2o: msg-last ( $:[tick0,msgs,..tickn] n -- ) \g query result
    64>n msg:last ;
+net2o: msg-want ( $:[hash0,...,hashn] -- ) \g request objects
    $> msg:want ;
\ ID should be <host><pksig> instead of <pk><host>
+net2o: msg-ihave ( $:[hash0,...,hashn] $:[id] -- ) \g show what objects you have
    $> $> msg:ihave enqueue ;

net2o' nestsig net2o: msg-nestsig ( $:cmd+sig -- ) \g check sig+nest
    $> nest-sig ?dup-0=-IF
	handle-msg
    ELSE  replay-mode @ IF  drop  ELSE  !!sig!!  THEN

* Push to talk, hotkeys for everything
* Hotkey for cut mark + keyframe
* Local recording with higher res/audio quality for presenter
* Allow multiple devices (cameras, mics) for one participant (Akira Kurosawa
  setup), no own audio in backchannel
  - Bonus points if multiple participants in the same room can be identified
    (e.g. send a short chirp out, and check for it in other audio streams)
  - room microphone mode — device does not receive audio or video, and can
    send audio only in push-to-talk mode.
* Templates for nice presentation recording
* Set a logo for the talk
* Have a countdown clock for talk slots
* Share slides directly (slides in Markdown)
* Subtitles as option for slides (possibly multiple languages)
* Translated audio tracks to select from (for bigger conferences)
* Rooms for small-group side conversation