@ -16,7 +16,7 @@ from .lnutil import sign_and_get_sig_string
from . lnutil import make_htlc_tx_with_open_channel , make_commitment , make_received_htlc , make_offered_htlc
from . lnutil import HTLC_TIMEOUT_WEIGHT , HTLC_SUCCESS_WEIGHT
from . lnutil import funding_output_script , extract_ctn_from_tx_and_chan
from . lnutil import LOCAL , REMOTE , SENT , RECEIVED
from . lnutil import LOCAL , REMOTE , SENT , RECEIVED , HTLCOwner
from . transaction import Transaction
@ -34,12 +34,22 @@ FUNDEE_ACKED = FeeUpdateProgress.FUNDEE_ACKED
FUNDER_SIGNED = FeeUpdateProgress . FUNDER_SIGNED
COMMITTED = FeeUpdateProgress . COMMITTED
class FeeUpdate :
from collections import namedtuple
def __init__ ( self , chan , feerate ) :
self . rate = feerate
self . proposed = chan . remote_state . ctn if not chan . constraints . is_initiator else chan . local_state . ctn
self . progress = { FUNDEE_SIGNED : None , FUNDEE_ACKED : None , FUNDER_SIGNED : None , COMMITTED : None }
class FeeUpdate :
def __init__ ( self , chan , * * kwargs ) :
if ' rate ' in kwargs :
self . rate = kwargs [ ' rate ' ]
else :
assert False
if ' proposed ' not in kwargs :
self . proposed = chan . remote_state . ctn if not chan . constraints . is_initiator else chan . local_state . ctn
else :
self . proposed = kwargs [ ' proposed ' ]
if ' progress ' not in kwargs :
self . progress = { FUNDEE_SIGNED : None , FUNDEE_ACKED : None , FUNDER_SIGNED : None , COMMITTED : None }
else :
self . progress = { FeeUpdateProgress [ x . partition ( ' . ' ) [ 2 ] ] : y for x , y in kwargs [ ' progress ' ] . items ( ) }
self . chan = chan
@property
@ -65,30 +75,30 @@ class FeeUpdate:
if subject == LOCAL and not self . chan . constraints . is_initiator :
return self . rate
class UpdateAddHtlc :
def __init__ ( self , amount_msat , payment_hash , cltv_expiry ) :
self . amount_msat = amount_msat
self . payment_hash = payment_hash
self . cltv_expiry = cltv_expiry
# the height the htlc was locked in at, or None
self . locked_in = { LOCAL : None , REMOTE : None }
self . settled = { LOCAL : None , REMOTE : None }
self . htlc_id = None
def as_tuple ( self ) :
return ( self . htlc_id , self . amount_msat , self . payment_hash , self . cltv_expiry , self . locked_in [ REMOTE ] , self . locked_in [ LOCAL ] , self . settled )
def __hash__ ( self ) :
return hash ( self . as_tuple ( ) )
def __eq__ ( self , o ) :
return type ( o ) is UpdateAddHtlc and self . as_tuple ( ) == o . as_tuple ( )
def __repr__ ( self ) :
return " UpdateAddHtlc " + str ( self . as_tuple ( ) )
def to_save ( self ) :
return { ' rate ' : self . rate , ' proposed ' : self . proposed , ' progress ' : self . progress }
class UpdateAddHtlc ( namedtuple ( ' UpdateAddHtlc ' , [ ' amount_msat ' , ' payment_hash ' , ' cltv_expiry ' , ' settled ' , ' locked_in ' , ' htlc_id ' ] ) ) :
__slots__ = ( )
def __new__ ( cls , * args , * * kwargs ) :
if len ( args ) > 0 :
args = list ( args )
if type ( args [ 1 ] ) is str :
args [ 1 ] = bfh ( args [ 1 ] )
args [ 3 ] = { HTLCOwner ( int ( x ) ) : y for x , y in args [ 3 ] . items ( ) }
args [ 4 ] = { HTLCOwner ( int ( x ) ) : y for x , y in args [ 4 ] . items ( ) }
return super ( ) . __new__ ( cls , * args )
if type ( kwargs [ ' payment_hash ' ] ) is str :
kwargs [ ' payment_hash ' ] = bfh ( kwargs [ ' payment_hash ' ] )
if ' locked_in ' not in kwargs :
kwargs [ ' locked_in ' ] = { LOCAL : None , REMOTE : None }
else :
kwargs [ ' locked_in ' ] = { HTLCOwner ( int ( x ) ) : y for x , y in kwargs [ ' locked_in ' ] }
if ' settled ' not in kwargs :
kwargs [ ' settled ' ] = { LOCAL : None , REMOTE : None }
else :
kwargs [ ' settled ' ] = { HTLCOwner ( int ( x ) ) : y for x , y in kwargs [ ' settled ' ] }
return super ( ) . __new__ ( cls , * * kwargs )
is_key = lambda k : k . endswith ( " _basepoint " ) or k . endswith ( " _key " )
@ -155,10 +165,22 @@ class HTLCStateMachine(PrintError):
self . remote_commitment_to_be_revoked = Transaction ( state [ " remote_commitment_to_be_revoked " ] )
self . log = { LOCAL : [ ] , REMOTE : [ ] }
for strname , subject in [ ( ' remote_log ' , REMOTE ) , ( ' local_log ' , LOCAL ) ] :
if strname not in state : continue
for typ , y in state [ strname ] :
if typ == " UpdateAddHtlc " :
self . log [ subject ] . append ( UpdateAddHtlc ( * decodeAll ( y ) ) )
elif typ == " SettleHtlc " :
self . log [ subject ] . append ( SettleHtlc ( * decodeAll ( y ) ) )
else :
assert False
self . name = name
self . fee_mgr = [ ]
if ' fee_updates ' in state :
for y in state [ ' fee_updates ' ] :
self . fee_mgr . append ( FeeUpdate ( self , * * y ) )
self . local_commitment = self . pending_local_commitment
self . remote_commitment = self . pending_remote_commitment
@ -190,13 +212,12 @@ class HTLCStateMachine(PrintError):
AddHTLC adds an HTLC to the state machine ' s local update log. This method
should be called when preparing to send an outgoing HTLC .
"""
assert type ( htlc ) is UpdateAddHtlc
assert type ( htlc ) is dict
htlc = UpdateAddHtlc ( * * htlc , htlc_id = self . local_state . next_htlc_id )
self . log [ LOCAL ] . append ( htlc )
self . print_error ( " add_htlc " )
htlc_id = self . local_state . next_htlc_id
self . local_state = self . local_state . _replace ( next_htlc_id = htlc_id + 1 )
htlc . htlc_id = htlc_id
return htlc_id
self . local_state = self . local_state . _replace ( next_htlc_id = htlc . htlc_id + 1 )
return htlc . htlc_id
def receive_htlc ( self , htlc ) :
"""
@ -204,13 +225,12 @@ class HTLCStateMachine(PrintError):
method should be called in response to receiving a new HTLC from the remote
party .
"""
self . print_error ( " receive_htlc " )
assert type ( htlc ) is UpdateAddHtlc
assert type ( htlc ) is dict
htlc = UpdateAddHtlc ( * * htlc , htlc_id = self . remote_state . next_htlc_id )
self . log [ REMOTE ] . append ( htlc )
htlc_id = self . remote_state . next_htlc_id
self . remote_state = self . remote_state . _replace ( next_htlc_id = htlc_id + 1 )
htlc . htlc_id = htlc_id
return htlc_id
self . print_error ( " receive_htlc " )
self . remote_state = self . remote_state . _replace ( next_htlc_id = htlc . htlc_id + 1 )
return htlc . htlc_id
def sign_next_commitment ( self ) :
"""
@ -431,6 +451,9 @@ class HTLCStateMachine(PrintError):
amount_msat = self . local_state . amount_msat + ( received_this_batch - sent_this_batch )
)
self . balance ( LOCAL )
self . balance ( REMOTE )
for pending_fee in self . fee_mgr :
if pending_fee . is_proposed ( ) :
if self . constraints . is_initiator :
@ -441,6 +464,26 @@ class HTLCStateMachine(PrintError):
self . remote_commitment_to_be_revoked = prev_remote_commitment
return received_this_batch , sent_this_batch
def balance ( self , subject ) :
initial = self . local_config . initial_msat if subject == LOCAL else self . remote_config . initial_msat
for x in self . log [ - subject ] :
if type ( x ) is not SettleHtlc : continue
htlc = self . lookup_htlc ( self . log [ subject ] , x . htlc_id )
htlc_height = htlc . settled [ subject ]
if htlc_height is not None and htlc_height < = self . current_height [ subject ] :
initial - = htlc . amount_msat
for x in self . log [ subject ] :
if type ( x ) is not SettleHtlc : continue
htlc = self . lookup_htlc ( self . log [ - subject ] , x . htlc_id )
htlc_height = htlc . settled [ - subject ]
if htlc_height is not None and htlc_height < = self . current_height [ - subject ] :
initial + = htlc . amount_msat
assert initial == ( self . local_state . amount_msat if subject == LOCAL else self . remote_state . amount_msat )
return initial
@staticmethod
def htlcsum ( htlcs ) :
amount_unsettled = 0
@ -611,13 +654,13 @@ class HTLCStateMachine(PrintError):
def update_fee ( self , feerate ) :
if not self . constraints . is_initiator :
raise Exception ( " only initiator can update_fee, this counterparty is not initiator " )
pending_fee = FeeUpdate ( self , feerate )
pending_fee = FeeUpdate ( self , rate = feerate )
self . fee_mgr . append ( pending_fee )
def receive_update_fee ( self , feerate ) :
if self . constraints . is_initiator :
raise Exception ( " only the non-initiator can receive_update_fee, this counterparty is initiator " )
pending_fee = FeeUpdate ( self , feerate )
pending_fee = FeeUpdate ( self , rate = feerate )
self . fee_mgr . append ( pending_fee )
def to_save ( self ) :
@ -632,6 +675,9 @@ class HTLCStateMachine(PrintError):
" funding_outpoint " : self . funding_outpoint ,
" node_id " : self . node_id ,
" remote_commitment_to_be_revoked " : str ( self . remote_commitment_to_be_revoked ) ,
" remote_log " : [ ( type ( x ) . __name__ , x ) for x in self . log [ REMOTE ] ] ,
" local_log " : [ ( type ( x ) . __name__ , x ) for x in self . log [ LOCAL ] ] ,
" fee_updates " : [ x . to_save ( ) for x in self . fee_mgr ] ,
}
def serialize ( self ) :
@ -643,7 +689,13 @@ class HTLCStateMachine(PrintError):
return binascii . hexlify ( o ) . decode ( " ascii " )
if isinstance ( o , RevocationStore ) :
return o . serialize ( )
if isinstance ( o , SettleHtlc ) :
return json . dumps ( ( ' SettleHtlc ' , namedtuples_to_dict ( o ) ) )
if isinstance ( o , UpdateAddHtlc ) :
return json . dumps ( ( ' UpdateAddHtlc ' , namedtuples_to_dict ( o ) ) )
return super ( MyJsonEncoder , self )
for fee_upd in serialized_channel [ ' fee_updates ' ] :
fee_upd [ ' progress ' ] = { str ( k ) : v for k , v in fee_upd [ ' progress ' ] . items ( ) }
dumped = MyJsonEncoder ( ) . encode ( serialized_channel )
roundtripped = json . loads ( dumped )
reconstructed = HTLCStateMachine ( roundtripped )
Janus
6 years ago
ThomasV