@ -9,6 +9,7 @@
# include <ccan/noerr/noerr.h>
# include <ccan/take/take.h>
# include <ccan/tal/str/str.h>
# include <close_tx.h>
# include <daemon/chaintopology.h>
# include <daemon/dns.h>
# include <daemon/jsonrpc.h>
@ -20,6 +21,8 @@
# include <lightningd/build_utxos.h>
# include <lightningd/channel.h>
# include <lightningd/channel/gen_channel_wire.h>
# include <lightningd/closing/gen_closing_wire.h>
# include <lightningd/commit_tx.h>
# include <lightningd/funding_tx.h>
# include <lightningd/gen_peer_state_names.h>
# include <lightningd/gossip/gen_gossip_wire.h>
@ -382,6 +385,7 @@ void add_peer(struct lightningd *ld, u64 unique_id,
= peer - > num_revocations_received = 0 ;
peer - > next_htlc_id = 0 ;
shachain_init ( & peer - > their_shachain ) ;
peer - > closing_sig_sent = peer - > closing_sig_received = NULL ;
idname = type_to_string ( peer , struct pubkey , id ) ;
@ -1044,7 +1048,7 @@ static int peer_got_shutdown(struct peer *peer, const u8 *msg)
return 0 ;
}
static int peer _got_bad_message( struct peer * peer , const u8 * msg )
static int channeld _got_bad_message( struct peer * peer , const u8 * msg )
{
u8 * err ;
@ -1058,9 +1062,197 @@ static int peer_got_bad_message(struct peer *peer, const u8 *msg)
return - 1 ;
}
static int closingd_got_bad_message ( struct peer * peer , const u8 * msg )
{
u8 * err ;
/* Don't try to fail this (again!) when owner dies. */
peer - > owner = NULL ;
if ( ! fromwire_closing_peer_bad_message ( peer , NULL , NULL , & err ) )
err = ( u8 * ) tal_strdup ( peer , " Internal error after bad message " ) ;
peer_fail_permanent ( peer , take ( err ) ) ;
/* Kill daemon (though it's dying anyway) */
return - 1 ;
}
static int closingd_got_negotiation_error ( struct peer * peer , const u8 * msg )
{
u8 * err ;
if ( ! fromwire_closing_negotiation_error ( peer , NULL , NULL , & err ) )
peer_internal_error ( peer , " Bad closing_negotiation %s " ,
tal_hex ( peer , msg ) ) ;
else
peer_internal_error ( peer , " %s " , err ) ;
/* Kill daemon (though it's dying anyway) */
return - 1 ;
}
static int peer_received_closing_signature ( struct peer * peer , const u8 * msg )
{
u64 fee_satoshi ;
secp256k1_ecdsa_signature sig ;
if ( ! fromwire_closing_received_signature ( msg , NULL ,
& fee_satoshi , & sig ) ) {
peer_internal_error ( peer , " Bad closing_received_signature %s " ,
tal_hex ( peer , msg ) ) ;
return - 1 ;
}
/* FIXME: Make sure offer is in useful range! */
/* FIXME: Make sure signature is correct! */
/* FIXME: save to db. */
peer - > closing_fee_received = fee_satoshi ;
tal_free ( peer - > closing_sig_received ) ;
peer - > closing_sig_received
= tal_dup ( peer , secp256k1_ecdsa_signature , & sig ) ;
/* OK, you can continue now. */
subd_send_msg ( peer - > owner ,
take ( towire_closing_received_signature_reply ( peer ) ) ) ;
return 0 ;
}
static int peer_offered_closing_signature ( struct peer * peer , const u8 * msg )
{
u64 fee_satoshi ;
secp256k1_ecdsa_signature sig ;
if ( ! fromwire_closing_offered_signature ( msg , NULL , & fee_satoshi , & sig ) ) {
peer_internal_error ( peer , " Bad closing_offered_signature %s " ,
tal_hex ( peer , msg ) ) ;
return - 1 ;
}
/* FIXME: Make sure offer is in useful range! */
/* FIXME: Make sure signature is correct! */
/* FIXME: save to db. */
peer - > closing_fee_sent = fee_satoshi ;
tal_free ( peer - > closing_sig_sent ) ;
peer - > closing_sig_sent
= tal_dup ( peer , secp256k1_ecdsa_signature , & sig ) ;
/* OK, you can continue now. */
subd_send_msg ( peer - > owner ,
take ( towire_closing_offered_signature_reply ( peer ) ) ) ;
return 0 ;
}
static int peer_closing_complete ( struct peer * peer , const u8 * msg )
{
struct bitcoin_tx * tx ;
u8 * local_scriptpubkey ;
u64 out_amounts [ NUM_SIDES ] ;
struct pubkey local_funding_pubkey ;
if ( ! fromwire_closing_complete ( msg , NULL ) ) {
peer_internal_error ( peer , " Bad closing_complete %s " ,
tal_hex ( peer , msg ) ) ;
return - 1 ;
}
if ( ! peer - > closing_sig_sent ) {
peer_internal_error ( peer ,
" closing_complete without receiving sig! " ) ;
return - 1 ;
}
if ( ! peer - > closing_sig_received ) {
peer_internal_error ( peer ,
" closing_complete without sending sig! " ) ;
return - 1 ;
}
local_scriptpubkey = p2wpkh_for_keyidx ( msg , peer - > ld ,
peer - > local_shutdown_idx ) ;
if ( ! local_scriptpubkey ) {
peer_internal_error ( peer ,
" Can't generate local shutdown scriptpubkey " ) ;
return - 1 ;
}
/* BOLT #3:
*
* The amounts for each output MUST BE rounded down to whole satoshis .
*/
out_amounts [ LOCAL ] = * peer - > balance / 1000 ;
out_amounts [ REMOTE ] = peer - > funding_satoshi - * peer - > balance / 1000 ;
out_amounts [ peer - > funder ] - = peer - > closing_fee_received ;
derive_basepoints ( peer - > seed , & local_funding_pubkey , NULL , NULL , NULL ) ;
tx = create_close_tx ( msg , local_scriptpubkey ,
peer - > remote_shutdown_scriptpubkey ,
peer - > funding_txid ,
peer - > funding_outnum ,
peer - > funding_satoshi ,
out_amounts [ LOCAL ] ,
out_amounts [ REMOTE ] ,
peer - > our_config . dust_limit_satoshis ) ;
tx - > input [ 0 ] . witness
= bitcoin_witness_2of2 ( tx - > input ,
peer - > closing_sig_received ,
peer - > closing_sig_sent ,
& peer - > channel_info - > remote_fundingkey ,
& local_funding_pubkey ) ;
/* Keep broadcasting until we say stop (can fail due to dup,
* if they beat us to the broadcast ) . */
broadcast_tx ( peer - > ld - > topology , peer , tx , NULL ) ;
/* FIXME: Set state. */
return - 1 ;
}
static int closing_msg ( struct subd * sd , const u8 * msg , const int * fds )
{
enum closing_wire_type t = fromwire_peektype ( msg ) ;
switch ( t ) {
/* We let peer_owner_finished handle these as transient errors. */
case WIRE_CLOSING_BAD_COMMAND :
case WIRE_CLOSING_GOSSIP_FAILED :
case WIRE_CLOSING_INTERNAL_ERROR :
case WIRE_CLOSING_PEER_READ_FAILED :
case WIRE_CLOSING_PEER_WRITE_FAILED :
return - 1 ;
/* These are permanent errors. */
case WIRE_CLOSING_PEER_BAD_MESSAGE :
return closingd_got_bad_message ( sd - > peer , msg ) ;
case WIRE_CLOSING_NEGOTIATION_ERROR :
return closingd_got_negotiation_error ( sd - > peer , msg ) ;
case WIRE_CLOSING_RECEIVED_SIGNATURE :
return peer_received_closing_signature ( sd - > peer , msg ) ;
case WIRE_CLOSING_OFFERED_SIGNATURE :
return peer_offered_closing_signature ( sd - > peer , msg ) ;
case WIRE_CLOSING_COMPLETE :
return peer_closing_complete ( sd - > peer , msg ) ;
/* We send these, not receive them */
case WIRE_CLOSING_INIT :
case WIRE_CLOSING_RECEIVED_SIGNATURE_REPLY :
case WIRE_CLOSING_OFFERED_SIGNATURE_REPLY :
break ;
}
return 0 ;
}
static int peer_start_closing ( struct peer * peer , const u8 * msg , const int * fds )
{
struct crypto_state cs ;
u8 * initmsg , * local_scriptpubkey ;
u64 minfee , maxfee , startfee ;
/* We expect 2 fds. */
if ( ! fds )
@ -1083,9 +1275,63 @@ static int peer_start_closing(struct peer *peer, const u8 *msg, const int *fds)
return - 1 ;
}
/* FIXME: Start closingd. */
peer - > owner = NULL ;
peer - > owner = new_subd ( peer - > ld , peer - > ld ,
" lightningd_closing " , peer ,
closing_wire_type_name ,
closing_msg ,
peer_owner_finished ,
take ( & fds [ 0 ] ) ,
take ( & fds [ 1 ] ) , NULL ) ;
if ( ! peer - > owner ) {
log_unusual ( peer - > log , " Could not subdaemon closing: %s " ,
strerror ( errno ) ) ;
peer_fail_transient ( peer , " Failed to subdaemon closing " ) ;
return - 1 ;
}
peer_set_condition ( peer , CHANNELD_SHUTTING_DOWN , CLOSINGD_SIGEXCHANGE ) ;
local_scriptpubkey = p2wpkh_for_keyidx ( msg , peer - > ld ,
peer - > local_shutdown_idx ) ;
if ( ! local_scriptpubkey ) {
peer_internal_error ( peer ,
" Can't generate local shutdown scriptpubkey " ) ;
return - 1 ;
}
/* FIXME: Real fees! */
maxfee = commit_tx_base_fee ( get_feerate ( peer - > ld - > topology ) , 0 ) ;
minfee = maxfee / 2 ;
if ( peer - > closing_sig_sent )
startfee = peer - > closing_fee_sent ;
else
startfee = ( maxfee + minfee ) / 2 ;
/* BOLT #3:
*
* The amounts for each output MUST BE rounded down to whole satoshis .
*/
initmsg = towire_closing_init ( peer ,
& cs ,
peer - > seed ,
peer - > funding_txid ,
peer - > funding_outnum ,
peer - > funding_satoshi ,
& peer - > channel_info - > remote_fundingkey ,
peer - > funder ,
* peer - > balance / 1000 ,
peer - > funding_satoshi
- * peer - > balance / 1000 ,
peer - > our_config . dust_limit_satoshis ,
minfee , maxfee , startfee ,
local_scriptpubkey ,
peer - > remote_shutdown_scriptpubkey ) ;
/* We don't expect a response: it will give us feedback on
* signatures sent and received , then closing_complete . */
subd_send_msg ( peer - > owner , take ( initmsg ) ) ;
/* Close the channeld */
return - 1 ;
}
@ -1125,7 +1371,7 @@ static int channel_msg(struct subd *sd, const u8 *msg, const int *fds)
/* This is a permanent error. */
case WIRE_CHANNEL_PEER_BAD_MESSAGE :
return peer _got_bad_message( sd - > peer , msg ) ;
return channeld _got_bad_message( sd - > peer , msg ) ;
/* And we never get these from channeld. */
case WIRE_CHANNEL_INIT :
Rusty Russell
8 years ago