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protocol: implement close as per BOLT #2.

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We don't actually implement closing when we have HTLCs (we should
allow it, as that's what the clearing phase is for), since soon we'll
rewrite HTLC to match the async HTLC protocol of BOLT #2.

Note that this folds the close paths, using a simple check if we have
a close transaction.  That's a slight state layer violation, but
reduces code duplication.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-03-24 12:09:41 +10:30
parent afedf0e8ac
commit b423b33236
10 changed files with 516 additions and 623 deletions
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18
state_types.h
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@@ -52,10 +52,12 @@ enum state {
/*
* Closing.
*/
/* We told them to close, waiting for complete msg. */
STATE_WAIT_FOR_CLOSE_COMPLETE,
/* They told us to close, waiting for ack msg. */
STATE_WAIT_FOR_CLOSE_ACK,
/* We told them to clear. */
STATE_US_CLEARING,
/* They told us to clear, or acked our CLEARING. */
STATE_BOTH_CLEARING,
/* We're cleared, waiting for close signature / negotiation */
STATE_WAIT_FOR_CLOSE_SIG,
/* All closed. */
STATE_CLOSED,
@@ -204,9 +206,8 @@ enum state_input {
PKT_UPDATE_COMPLETE = PKT__PKT_UPDATE_COMPLETE,
/* Mutual close sequence. */
PKT_CLOSE = PKT__PKT_CLOSE,
PKT_CLOSE_COMPLETE = PKT__PKT_CLOSE_COMPLETE,
PKT_CLOSE_ACK = PKT__PKT_CLOSE_ACK,
PKT_CLOSE_CLEARING = PKT__PKT_CLOSE_CLEARING,
PKT_CLOSE_SIGNATURE = PKT__PKT_CLOSE_SIGNATURE,
/* Something unexpected went wrong. */
PKT_ERROR = PKT__PKT_ERROR,
@@ -256,6 +257,9 @@ enum state_input {
/* We are not watching any HTLCs any more. */
INPUT_NO_MORE_HTLCS,
/* No more HTLCs in either commitment tx. */
INPUT_HTLCS_CLEARED,
/*
* Timeouts.
*/