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daemon: close command.

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This performs a mutual close.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-01-22 06:45:28 +10:30
parent 45c5c83d6f
commit 168ed96b12
10 changed files with 272 additions and 55 deletions
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76
daemon/packets.c
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@@ -1,5 +1,6 @@
#include "bitcoin/script.h"
#include "bitcoin/tx.h"
#include "close_tx.h"
#include "controlled_time.h"
#include "find_p2sh_out.h"
#include "lightningd.h"
@@ -242,32 +243,32 @@ Pkt *pkt_err(const tal_t *ctx, const char *msg, ...)
Pkt *pkt_close(const tal_t *ctx, const struct peer *peer)
{
CloseChannel *c = tal(ctx, CloseChannel);
struct signature sig;
close_channel__init(c);
/* FIXME: If we're not connected, we don't create close tx. */
if (!peer->close_tx) {
c->close_fee = 0;
memset(&sig, 0, sizeof(sig));
c->sig = signature_to_proto(c, &sig);
} else {
c->close_fee = peer->close_tx->fee;
peer_sign_mutual_close(peer, peer->close_tx, &sig);
c->sig = signature_to_proto(c, &sig);
}
c->close_fee = peer->close_tx->fee;
c->sig = signature_to_proto(c, &peer->our_close_sig.sig);
return make_pkt(ctx, PKT__PKT_CLOSE, c);
}
Pkt *pkt_close_complete(const tal_t *ctx, const struct peer *peer)
{
FIXME_STUB(peer);
CloseChannelComplete *c = tal(ctx, CloseChannelComplete);
close_channel_complete__init(c);
assert(peer->close_tx);
c->sig = signature_to_proto(c, &peer->our_close_sig.sig);
return make_pkt(ctx, PKT__PKT_CLOSE_COMPLETE, c);
}
Pkt *pkt_close_ack(const tal_t *ctx, const struct peer *peer)
{
FIXME_STUB(peer);
CloseChannelAck *a = tal(ctx, CloseChannelAck);
close_channel_ack__init(a);
return make_pkt(ctx, PKT__PKT_CLOSE_ACK, a);
}
Pkt *pkt_err_unexpected(const tal_t *ctx, const Pkt *pkt)
@@ -758,15 +759,57 @@ Pkt *accept_pkt_update_signature(const tal_t *ctx,
return NULL;
}
static bool peer_sign_close_tx(struct peer *peer, const Signature *theirs)
{
struct bitcoin_signature theirsig;
/* We never sign twice! */
assert(peer->close_tx->input[0].script_length == 0);
theirsig.stype = SIGHASH_ALL;
if (!proto_to_signature(theirs, &theirsig.sig))
return false;
/* Their sig + ours should sign the close tx. */
if (!check_2of2_sig(peer->dstate->secpctx,
peer->close_tx, 0,
peer->anchor.redeemscript,
tal_count(peer->anchor.redeemscript),
&peer->them.commitkey, &peer->us.commitkey,
&theirsig, &peer->our_close_sig))
return false;
/* Complete the close_tx, using signatures. */
peer->close_tx->input[0].script
= scriptsig_p2sh_2of2(peer->close_tx,
&theirsig, &peer->our_close_sig,
&peer->them.commitkey,
&peer->us.commitkey);
peer->close_tx->input[0].script_length
= tal_count(peer->close_tx->input[0].script);
return true;
}
Pkt *accept_pkt_close(const tal_t *ctx, struct peer *peer, const Pkt *pkt)
{
FIXME_STUB(peer);
const CloseChannel *c = pkt->close;
/* FIXME: Don't accept tiny close fee! */
if (!peer_create_close_tx(peer, c->close_fee))
return pkt_err(ctx, "Invalid close fee");
if (!peer_sign_close_tx(peer, c->sig))
return pkt_err(ctx, "Invalid signature");
return NULL;
}
Pkt *accept_pkt_close_complete(const tal_t *ctx,
struct peer *peer, const Pkt *pkt)
{
FIXME_STUB(peer);
const CloseChannelComplete *c = pkt->close_complete;
if (!peer_sign_close_tx(peer, c->sig))
return pkt_err(ctx, "Invalid signature");
return NULL;
}
Pkt *accept_pkt_simultaneous_close(const tal_t *ctx,
@@ -776,7 +819,8 @@ Pkt *accept_pkt_simultaneous_close(const tal_t *ctx,
FIXME_STUB(peer);
}
/* FIXME: Since this packet is empty, is it worth having? */
Pkt *accept_pkt_close_ack(const tal_t *ctx, struct peer *peer, const Pkt *pkt)
{
FIXME_STUB(peer);
return NULL;
}