def verify_unsigned_tx(self, txd):
tx_utxo_set = set(ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index']) for ins in txd['ins'])
# complete authentication: check the tx input uses the authing pubkey
input_utxo_data = jm_single().bc_interface.query_utxo_set(
list(tx_utxo_set))
if None in input_utxo_data:
return False, 'some utxos already spent or not confirmed yet'
input_addresses = [u['address'] for u in input_utxo_data]
if btc.pubtoaddr(
self.i_utxo_pubkey, get_p2pk_vbyte()) not in input_addresses:
return False, "authenticating bitcoin address is not contained"
my_utxo_set = set(self.utxos.keys())
if not tx_utxo_set.issuperset(my_utxo_set):
return False, 'my utxos are not contained'
my_total_in = sum([va['value'] for va in self.utxos.values()])
self.real_cjfee = calc_cj_fee(
self.ordertype, self.cjfee, self.cj_amount)
expected_change_value = (
my_total_in - self.cj_amount - self.txfee + self.real_cjfee)
log.debug('potentially earned = {}'.format(
self.real_cjfee - self.txfee))
log.debug('mycjaddr, mychange = {}, {}'.format(
self.cj_addr, self.change_addr))
times_seen_cj_addr = 0
times_seen_change_addr = 0
for outs in txd['outs']:
addr = btc.script_to_address(outs['script'], get_p2pk_vbyte())
if addr == self.cj_addr:
times_seen_cj_addr += 1
if outs['value'] != self.cj_amount:
return False, 'Wrong cj_amount. I expect ' + str(
self.cj_amount)
if addr == self.change_addr:
times_seen_change_addr += 1
if outs['value'] != expected_change_value:
return False, 'wrong change, i expect ' + str(
expected_change_value)
if times_seen_cj_addr != 1 or times_seen_change_addr != 1:
fmt = ('cj or change addr not in tx '
'outputs once, #cjaddr={}, #chaddr={}').format
return False, (fmt(times_seen_cj_addr, times_seen_change_addr))
return True, None
def verify_unsigned_tx(self, txd):
tx_utxo_set = set(ins['outpoint']['hash'] + ':' +
str(ins['outpoint']['index']) for ins in txd['ins'])
# complete authentication: check the tx input uses the authing pubkey
input_utxo_data = jm_single().bc_interface.query_utxo_set(
list(tx_utxo_set))
if None in input_utxo_data:
return False, 'some utxos already spent or not confirmed yet'
input_addresses = [u['address'] for u in input_utxo_data]
if btc.pubtoaddr(self.i_utxo_pubkey,
get_p2pk_vbyte()) not in input_addresses:
return False, "authenticating bitcoin address is not contained"
my_utxo_set = set(self.utxos.keys())
if not tx_utxo_set.issuperset(my_utxo_set):
return False, 'my utxos are not contained'
my_total_in = sum([va['value'] for va in self.utxos.values()])
self.real_cjfee = calc_cj_fee(self.ordertype, self.cjfee,
self.cj_amount)
expected_change_value = (my_total_in - self.cj_amount - self.txfee +
self.real_cjfee)
log.debug('potentially earned = {}'.format(self.real_cjfee -
self.txfee))
log.debug('mycjaddr, mychange = {}, {}'.format(self.cj_addr,
self.change_addr))
times_seen_cj_addr = 0
times_seen_change_addr = 0
for outs in txd['outs']:
addr = btc.script_to_address(outs['script'], get_p2pk_vbyte())
if addr == self.cj_addr:
times_seen_cj_addr += 1
if outs['value'] != self.cj_amount:
return False, 'Wrong cj_amount. I expect ' + str(
self.cj_amount)
if addr == self.change_addr:
times_seen_change_addr += 1
if outs['value'] != expected_change_value:
return False, 'wrong change, i expect ' + str(
expected_change_value)
if times_seen_cj_addr != 1 or times_seen_change_addr != 1:
fmt = ('cj or change addr not in tx '
'outputs once, #cjaddr={}, #chaddr={}').format
return False, (fmt(times_seen_cj_addr, times_seen_change_addr))
return True, None
def verify_unsigned_tx(self, txd):
tx_utxo_set = set(ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index']) for ins in txd['ins'])
my_utxo_set = set(self.utxos.keys())
if not tx_utxo_set.issuperset(my_utxo_set):
return False, 'my utxos are not contained'
my_total_in = sum([va['value'] for va in self.utxos.values()])
self.real_cjfee = calc_cj_fee(
self.ordertype, self.cjfee, self.cj_amount)
expected_change_value = (
my_total_in - self.cj_amount - self.txfee + self.real_cjfee)
log.info('potentially earned = {}'.format(
self.real_cjfee - self.txfee))
log.debug('mycjaddr, mychange = {}, {}'.format(
self.cj_addr, self.change_addr))
times_seen_cj_addr = 0
times_seen_change_addr = 0
for outs in txd['outs']:
addr = btc.script_to_address(outs['script'], get_p2pk_vbyte())
if addr == self.cj_addr:
times_seen_cj_addr += 1
if outs['value'] != self.cj_amount:
return False, 'Wrong cj_amount. I expect ' + str(
self.cj_amount)
if addr == self.change_addr:
times_seen_change_addr += 1
if outs['value'] != expected_change_value:
return False, 'wrong change, i expect ' + str(
expected_change_value)
if times_seen_cj_addr != 1 or times_seen_change_addr != 1:
fmt = ('cj or change addr not in tx '
'outputs once, #cjaddr={}, #chaddr={}').format
return False, (fmt(times_seen_cj_addr, times_seen_change_addr))
return True, None
def verify_unsigned_tx(self, txd):
tx_utxo_set = set(ins['outpoint']['hash'] + ':' +
str(ins['outpoint']['index']) for ins in txd['ins'])
my_utxo_set = set(self.utxos.keys())
if not tx_utxo_set.issuperset(my_utxo_set):
return False, 'my utxos are not contained'
my_total_in = sum([va['value'] for va in self.utxos.values()])
self.real_cjfee = calc_cj_fee(self.ordertype, self.cjfee,
self.cj_amount)
expected_change_value = (my_total_in - self.cj_amount - self.txfee +
self.real_cjfee)
log.debug('potentially earned = {}'.format(self.real_cjfee -
self.txfee))
log.debug('mycjaddr, mychange = {}, {}'.format(self.cj_addr,
self.change_addr))
times_seen_cj_addr = 0
times_seen_change_addr = 0
for outs in txd['outs']:
addr = btc.script_to_address(outs['script'], get_p2pk_vbyte())
if addr == self.cj_addr:
times_seen_cj_addr += 1
if outs['value'] != self.cj_amount:
return False, 'Wrong cj_amount. I expect ' + str(
self.cj_amount)
if addr == self.change_addr:
times_seen_change_addr += 1
if outs['value'] != expected_change_value:
return False, 'wrong change, i expect ' + str(
expected_change_value)
if times_seen_cj_addr != 1 or times_seen_change_addr != 1:
fmt = ('cj or change addr not in tx '
'outputs once, #cjaddr={}, #chaddr={}').format
return False, (fmt(times_seen_cj_addr, times_seen_change_addr))
return True, None
def recv_txio(self, nick, utxo_list, cj_pub, change_addr):
if nick not in self.nonrespondants:
log.debug(('recv_txio => nick={} not in '
'nonrespondants {}').format(nick, self.nonrespondants))
return
self.utxos[nick] = utxo_list
order = self.db.execute(
'SELECT ordertype, txfee, cjfee FROM '
'orderbook WHERE oid=? AND counterparty=?',
(self.active_orders[nick], nick)).fetchone()
utxo_data = jm_single().bc_interface.query_utxo_set(self.utxos[nick])
if None in utxo_data:
log.debug(('ERROR outputs unconfirmed or already spent. '
'utxo_data={}').format(pprint.pformat(utxo_data)))
# when internal reviewing of makers is created, add it here to
# immediately quit
return
# ignore this message, eventually the timeout thread will recover
total_input = sum([d['value'] for d in utxo_data])
real_cjfee = calc_cj_fee(order['ordertype'], order['cjfee'],
self.cj_amount)
self.outputs.append({
'address':
change_addr,
'value':
total_input - self.cj_amount - order['txfee'] + real_cjfee
})
fmt = ('fee breakdown for {} totalin={:d} '
'cjamount={:d} txfee={:d} realcjfee={:d}').format
log.debug(
fmt(nick, total_input, self.cj_amount, order['txfee'], real_cjfee))
cj_addr = btc.pubtoaddr(cj_pub, get_p2pk_vbyte())
self.outputs.append({'address': cj_addr, 'value': self.cj_amount})
self.cjfee_total += real_cjfee
self.maker_txfee_contributions += order['txfee']
self.nonrespondants.remove(nick)
if len(self.nonrespondants) > 0:
log.debug('nonrespondants = ' + str(self.nonrespondants))
return
self.all_responded = True
with self.timeout_lock:
self.timeout_lock.notify()
log.debug('got all parts, enough to build a tx')
self.nonrespondants = list(self.active_orders.keys())
my_total_in = sum(
[va['value'] for u, va in self.input_utxos.iteritems()])
if self.my_change_addr:
#Estimate fee per choice of next/3/6 blocks targetting.
estimated_fee = estimate_tx_fee(len(sum(self.utxos.values(), [])),
len(self.outputs) + 2)
log.debug("Based on initial guess: " + str(self.total_txfee) +
", we estimated a fee of: " + str(estimated_fee))
#reset total
self.total_txfee = estimated_fee
my_txfee = max(self.total_txfee - self.maker_txfee_contributions, 0)
my_change_value = (my_total_in - self.cj_amount - self.cjfee_total -
my_txfee)
#Since we could not predict the maker's inputs, we may end up needing
#too much such that the change value is negative or small. Note that
#we have tried to avoid this based on over-estimating the needed amount
#in SendPayment.create_tx(), but it is still a possibility if one maker
#uses a *lot* of inputs.
if self.my_change_addr and my_change_value <= 0:
raise ValueError("Calculated transaction fee of: " +
str(self.total_txfee) +
" is too large for our inputs;Please try again.")
elif self.my_change_addr and my_change_value <= jm_single(
).DUST_THRESHOLD:
log.debug("Dynamically calculated change lower than dust: " +
str(my_change_value) + "; dropping.")
self.my_change_addr = None
my_change_value = 0
log.debug(
'fee breakdown for me totalin=%d my_txfee=%d makers_txfee=%d cjfee_total=%d => changevalue=%d'
% (my_total_in, my_txfee, self.maker_txfee_contributions,
self.cjfee_total, my_change_value))
if self.my_change_addr is None:
if my_change_value != 0 and abs(my_change_value) != 1:
# seems you wont always get exactly zero because of integer
# rounding so 1 satoshi extra or fewer being spent as miner
# fees is acceptable
log.debug(('WARNING CHANGE NOT BEING '
'USED\nCHANGEVALUE = {}').format(my_change_value))
else:
self.outputs.append({
'address': self.my_change_addr,
'value': my_change_value
})
self.utxo_tx = [
dict([('output', u)]) for u in sum(self.utxos.values(), [])
]
self.outputs.append({
'address': self.coinjoin_address(),
'value': self.cj_amount
})
random.shuffle(self.utxo_tx)
random.shuffle(self.outputs)
tx = btc.mktx(self.utxo_tx, self.outputs)
log.debug('obtained tx\n' + pprint.pformat(btc.deserialize(tx)))
self.msgchan.send_tx(self.active_orders.keys(), tx)
self.latest_tx = btc.deserialize(tx)
for index, ins in enumerate(self.latest_tx['ins']):
utxo = ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index'])
if utxo not in self.input_utxos.keys():
continue
# placeholders required
ins['script'] = 'deadbeef'
def recv_txio(self, nick, utxo_list, cj_pub, change_addr):
if nick not in self.nonrespondants:
log.debug(('recv_txio => nick={} not in '
'nonrespondants {}').format(nick, self.nonrespondants))
return
self.utxos[nick] = utxo_list
utxo_data = jm_single().bc_interface.query_utxo_set(self.utxos[nick])
if None in utxo_data:
log.debug(('ERROR outputs unconfirmed or already spent. '
'utxo_data={}').format(pprint.pformat(utxo_data)))
# when internal reviewing of makers is created, add it here to
# immediately quit; currently, the timeout thread suffices.
return
total_input = sum([d['value'] for d in utxo_data])
real_cjfee = calc_cj_fee(self.active_orders[nick]['ordertype'],
self.active_orders[nick]['cjfee'], self.cj_amount)
change_amount = (total_input - self.cj_amount -
self.active_orders[nick]['txfee'] + real_cjfee)
# certain malicious and/or incompetent liquidity providers send
# inputs totalling less than the coinjoin amount! this leads to
# a change output of zero satoshis, so the invalid transaction
# fails harmlessly; let's fail earlier, with a clear message.
if change_amount < jm_single().DUST_THRESHOLD:
fmt = ('ERROR counterparty requires sub-dust change. nick={}'
'totalin={:d} cjamount={:d} change={:d}').format
log.debug(fmt(nick, total_input, self.cj_amount, change_amount))
return # timeout marks this maker as nonresponsive
self.outputs.append({'address': change_addr, 'value': change_amount})
fmt = ('fee breakdown for {} totalin={:d} '
'cjamount={:d} txfee={:d} realcjfee={:d}').format
log.debug(fmt(nick, total_input, self.cj_amount,
self.active_orders[nick]['txfee'], real_cjfee))
cj_addr = btc.pubtoaddr(cj_pub, get_p2pk_vbyte())
self.outputs.append({'address': cj_addr, 'value': self.cj_amount})
self.cjfee_total += real_cjfee
self.maker_txfee_contributions += self.active_orders[nick]['txfee']
self.nonrespondants.remove(nick)
if len(self.nonrespondants) > 0:
log.debug('nonrespondants = ' + str(self.nonrespondants))
return
log.debug('got all parts, enough to build a tx')
self.nonrespondants = list(self.active_orders.keys())
my_total_in = sum([va['value'] for u, va in
self.input_utxos.iteritems()])
if self.my_change_addr:
#Estimate fee per choice of next/3/6 blocks targetting.
estimated_fee = estimate_tx_fee(len(sum(
self.utxos.values(),[])), len(self.outputs)+2)
log.debug("Based on initial guess: "+str(
self.total_txfee)+", we estimated a fee of: "+str(estimated_fee))
#reset total
self.total_txfee = estimated_fee
my_txfee = max(self.total_txfee - self.maker_txfee_contributions, 0)
my_change_value = (
my_total_in - self.cj_amount - self.cjfee_total - my_txfee)
#Since we could not predict the maker's inputs, we may end up needing
#too much such that the change value is negative or small. Note that
#we have tried to avoid this based on over-estimating the needed amount
#in SendPayment.create_tx(), but it is still a possibility if one maker
#uses a *lot* of inputs.
if self.my_change_addr and my_change_value <= 0:
raise ValueError("Calculated transaction fee of: "+str(
self.total_txfee)+" is too large for our inputs;Please try again.")
elif self.my_change_addr and my_change_value <= jm_single().DUST_THRESHOLD:
log.debug("Dynamically calculated change lower than dust: "+str(
my_change_value)+"; dropping.")
self.my_change_addr = None
my_change_value = 0
log.debug('fee breakdown for me totalin=%d my_txfee=%d makers_txfee=%d cjfee_total=%d => changevalue=%d'
% (my_total_in, my_txfee, self.maker_txfee_contributions,
self.cjfee_total, my_change_value))
if self.my_change_addr is None:
if my_change_value != 0 and abs(my_change_value) != 1:
# seems you wont always get exactly zero because of integer
# rounding so 1 satoshi extra or fewer being spent as miner
# fees is acceptable
log.debug(('WARNING CHANGE NOT BEING '
'USED\nCHANGEVALUE = {}').format(my_change_value))
else:
self.outputs.append({'address': self.my_change_addr,
'value': my_change_value})
self.utxo_tx = [dict([('output', u)])
for u in sum(self.utxos.values(), [])]
self.outputs.append({'address': self.coinjoin_address(),
'value': self.cj_amount})
random.shuffle(self.utxo_tx)
random.shuffle(self.outputs)
tx = btc.mktx(self.utxo_tx, self.outputs)
log.debug('obtained tx\n' + pprint.pformat(btc.deserialize(tx)))
#Re-calculate a sensible timeout wait based on the throttling
#settings and the tx size.
#Calculation: Let tx size be S; tx undergoes two b64 expansions, 1.8*S
#So we're sending N*1.8*S over the wire, and the
#maximum bytes/sec = B, means we need (1.8*N*S/B) seconds,
#and need to add some leeway for network delays, we just add the
#contents of jm_single().maker_timeout_sec (the user configured value)
self.maker_timeout_sec = (len(tx) * 1.8 * len(
self.active_orders.keys()))/(B_PER_SEC) + jm_single().maker_timeout_sec
log.debug("Based on transaction size: " + str(
len(tx)) + ", calculated time to wait for replies: " + str(
self.maker_timeout_sec))
self.all_responded = True
with self.timeout_lock:
self.timeout_lock.notify()
self.msgchan.send_tx(self.active_orders.keys(), tx)
self.latest_tx = btc.deserialize(tx)
for index, ins in enumerate(self.latest_tx['ins']):
utxo = ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index'])
if utxo not in self.input_utxos.keys():
continue
# placeholders required
ins['script'] = 'deadbeef'
def recv_txio(self, nick, utxo_list, cj_pub, change_addr):
if nick not in self.nonrespondants:
log.debug(('recv_txio => nick={} not in '
'nonrespondants {}').format(nick, self.nonrespondants))
return
self.utxos[nick] = utxo_list
utxo_data = jm_single().bc_interface.query_utxo_set(self.utxos[nick])
if None in utxo_data:
log.debug(('ERROR outputs unconfirmed or already spent. '
'utxo_data={}').format(pprint.pformat(utxo_data)))
# when internal reviewing of makers is created, add it here to
# immediately quit
return
# ignore this message, eventually the timeout thread will recover
total_input = sum([d['value'] for d in utxo_data])
real_cjfee = calc_cj_fee(self.active_orders[nick]['ordertype'],
self.active_orders[nick]['cjfee'], self.cj_amount)
self.outputs.append({'address': change_addr,
'value': total_input - self.cj_amount -
self.active_orders[nick]['txfee'] + real_cjfee})
fmt = ('fee breakdown for {} totalin={:d} '
'cjamount={:d} txfee={:d} realcjfee={:d}').format
log.debug(fmt(nick, total_input, self.cj_amount,
self.active_orders[nick]['txfee'], real_cjfee))
cj_addr = btc.pubtoaddr(cj_pub, get_p2pk_vbyte())
self.outputs.append({'address': cj_addr, 'value': self.cj_amount})
self.cjfee_total += real_cjfee
self.maker_txfee_contributions += self.active_orders[nick]['txfee']
self.nonrespondants.remove(nick)
if len(self.nonrespondants) > 0:
log.debug('nonrespondants = ' + str(self.nonrespondants))
return
self.all_responded = True
with self.timeout_lock:
self.timeout_lock.notify()
log.debug('got all parts, enough to build a tx')
self.nonrespondants = list(self.active_orders.keys())
my_total_in = sum([va['value'] for u, va in
self.input_utxos.iteritems()])
if self.my_change_addr:
#Estimate fee per choice of next/3/6 blocks targetting.
estimated_fee = estimate_tx_fee(len(sum(
self.utxos.values(),[])), len(self.outputs)+2)
log.debug("Based on initial guess: "+str(
self.total_txfee)+", we estimated a fee of: "+str(estimated_fee))
#reset total
self.total_txfee = estimated_fee
my_txfee = max(self.total_txfee - self.maker_txfee_contributions, 0)
my_change_value = (
my_total_in - self.cj_amount - self.cjfee_total - my_txfee)
#Since we could not predict the maker's inputs, we may end up needing
#too much such that the change value is negative or small. Note that
#we have tried to avoid this based on over-estimating the needed amount
#in SendPayment.create_tx(), but it is still a possibility if one maker
#uses a *lot* of inputs.
if self.my_change_addr and my_change_value <= 0:
raise ValueError("Calculated transaction fee of: "+str(
self.total_txfee)+" is too large for our inputs;Please try again.")
elif self.my_change_addr and my_change_value <= jm_single().DUST_THRESHOLD:
log.debug("Dynamically calculated change lower than dust: "+str(
my_change_value)+"; dropping.")
self.my_change_addr = None
my_change_value = 0
log.debug('fee breakdown for me totalin=%d my_txfee=%d makers_txfee=%d cjfee_total=%d => changevalue=%d'
% (my_total_in, my_txfee, self.maker_txfee_contributions,
self.cjfee_total, my_change_value))
if self.my_change_addr is None:
if my_change_value != 0 and abs(my_change_value) != 1:
# seems you wont always get exactly zero because of integer
# rounding so 1 satoshi extra or fewer being spent as miner
# fees is acceptable
log.debug(('WARNING CHANGE NOT BEING '
'USED\nCHANGEVALUE = {}').format(my_change_value))
else:
self.outputs.append({'address': self.my_change_addr,
'value': my_change_value})
self.utxo_tx = [dict([('output', u)])
for u in sum(self.utxos.values(), [])]
self.outputs.append({'address': self.coinjoin_address(),
'value': self.cj_amount})
random.shuffle(self.utxo_tx)
random.shuffle(self.outputs)
tx = btc.mktx(self.utxo_tx, self.outputs)
log.debug('obtained tx\n' + pprint.pformat(btc.deserialize(tx)))
self.msgchan.send_tx(self.active_orders.keys(), tx)
self.latest_tx = btc.deserialize(tx)
for index, ins in enumerate(self.latest_tx['ins']):
utxo = ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index'])
if utxo not in self.input_utxos.keys():
continue
# placeholders required
ins['script'] = 'deadbeef'
def recv_txio(self, nick, utxo_list, auth_pub, cj_addr, change_addr):
if nick not in self.nonrespondants:
log.debug(('recv_txio => nick={} not in '
'nonrespondants {}').format(nick, self.nonrespondants))
return
self.utxos[nick] = utxo_list
utxo_data = jm_single().bc_interface.query_utxo_set(self.utxos[nick])
if None in utxo_data:
log.debug(('ERROR outputs unconfirmed or already spent. '
'utxo_data={}').format(pprint.pformat(utxo_data)))
# when internal reviewing of makers is created, add it here to
# immediately quit; currently, the timeout thread suffices.
return
#Complete maker authorization:
#Extract the address fields from the utxos
#Construct the Bitcoin address for the auth_pub field
#Ensure that at least one address from utxos corresponds.
input_addresses = [d['address'] for d in utxo_data]
auth_address = btc.pubkey_to_address(auth_pub, get_p2pk_vbyte())
if not auth_address in input_addresses:
log.debug("ERROR maker's authorising pubkey is not included "
"in the transaction: " + str(auth_address))
return
total_input = sum([d['value'] for d in utxo_data])
real_cjfee = calc_cj_fee(self.active_orders[nick]['ordertype'],
self.active_orders[nick]['cjfee'],
self.cj_amount)
change_amount = (total_input - self.cj_amount -
self.active_orders[nick]['txfee'] + real_cjfee)
# certain malicious and/or incompetent liquidity providers send
# inputs totalling less than the coinjoin amount! this leads to
# a change output of zero satoshis, so the invalid transaction
# fails harmlessly; let's fail earlier, with a clear message.
if change_amount < jm_single().DUST_THRESHOLD:
fmt = ('ERROR counterparty requires sub-dust change. nick={}'
'totalin={:d} cjamount={:d} change={:d}').format
log.debug(fmt(nick, total_input, self.cj_amount, change_amount))
return # timeout marks this maker as nonresponsive
self.outputs.append({'address': change_addr, 'value': change_amount})
fmt = ('fee breakdown for {} totalin={:d} '
'cjamount={:d} txfee={:d} realcjfee={:d}').format
log.debug(
fmt(nick, total_input, self.cj_amount,
self.active_orders[nick]['txfee'], real_cjfee))
self.outputs.append({'address': cj_addr, 'value': self.cj_amount})
self.cjfee_total += real_cjfee
self.maker_txfee_contributions += self.active_orders[nick]['txfee']
self.nonrespondants.remove(nick)
if len(self.nonrespondants) > 0:
log.debug('nonrespondants = ' + str(self.nonrespondants))
return
log.debug('got all parts, enough to build a tx')
self.nonrespondants = list(self.active_orders.keys())
my_total_in = sum(
[va['value'] for u, va in self.input_utxos.iteritems()])
if self.my_change_addr:
#Estimate fee per choice of next/3/6 blocks targetting.
estimated_fee = estimate_tx_fee(len(sum(self.utxos.values(), [])),
len(self.outputs) + 2)
log.debug("Based on initial guess: " + str(self.total_txfee) +
", we estimated a fee of: " + str(estimated_fee))
#reset total
self.total_txfee = estimated_fee
my_txfee = max(self.total_txfee - self.maker_txfee_contributions, 0)
my_change_value = (my_total_in - self.cj_amount - self.cjfee_total -
my_txfee)
#Since we could not predict the maker's inputs, we may end up needing
#too much such that the change value is negative or small. Note that
#we have tried to avoid this based on over-estimating the needed amount
#in SendPayment.create_tx(), but it is still a possibility if one maker
#uses a *lot* of inputs.
if self.my_change_addr and my_change_value <= 0:
raise ValueError("Calculated transaction fee of: " +
str(self.total_txfee) +
" is too large for our inputs;Please try again.")
elif self.my_change_addr and my_change_value <= jm_single(
).DUST_THRESHOLD:
log.debug("Dynamically calculated change lower than dust: " +
str(my_change_value) + "; dropping.")
self.my_change_addr = None
my_change_value = 0
log.debug(
'fee breakdown for me totalin=%d my_txfee=%d makers_txfee=%d cjfee_total=%d => changevalue=%d'
% (my_total_in, my_txfee, self.maker_txfee_contributions,
self.cjfee_total, my_change_value))
if self.my_change_addr is None:
if my_change_value != 0 and abs(my_change_value) != 1:
# seems you wont always get exactly zero because of integer
# rounding so 1 satoshi extra or fewer being spent as miner
# fees is acceptable
log.debug(('WARNING CHANGE NOT BEING '
'USED\nCHANGEVALUE = {}').format(my_change_value))
else:
self.outputs.append({
'address': self.my_change_addr,
'value': my_change_value
})
self.utxo_tx = [
dict([('output', u)]) for u in sum(self.utxos.values(), [])
]
self.outputs.append({
'address': self.coinjoin_address(),
'value': self.cj_amount
})
random.shuffle(self.utxo_tx)
random.shuffle(self.outputs)
tx = btc.mktx(self.utxo_tx, self.outputs)
log.debug('obtained tx\n' + pprint.pformat(btc.deserialize(tx)))
#Re-calculate a sensible timeout wait based on the throttling
#settings and the tx size.
#Calculation: Let tx size be S; tx undergoes two b64 expansions, 1.8*S
#So we're sending N*1.8*S over the wire, and the
#maximum bytes/sec = B, means we need (1.8*N*S/B) seconds,
#and need to add some leeway for network delays, we just add the
#contents of jm_single().maker_timeout_sec (the user configured value)
self.maker_timeout_sec = (len(tx) * 1.8 * len(self.active_orders.keys(
))) / (B_PER_SEC) + jm_single().maker_timeout_sec
log.debug("Based on transaction size: " + str(len(tx)) +
", calculated time to wait for replies: " +
str(self.maker_timeout_sec))
self.all_responded = True
with self.timeout_lock:
self.timeout_lock.notify()
self.msgchan.send_tx(self.active_orders.keys(), tx)
self.latest_tx = btc.deserialize(tx)
for index, ins in enumerate(self.latest_tx['ins']):
utxo = ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index'])
if utxo not in self.input_utxos.keys():
continue
# placeholders required
ins['script'] = 'deadbeef'