def compose(db, source, timestamp, value, fee_fraction, text):
# Store the fee fraction as an integer.
fee_fraction_int = int(fee_fraction * 1e8)
problems = validate(db, source, timestamp, value, fee_fraction_int, text,
util.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
data = struct.pack(config.TXTYPE_FORMAT, ID)
# always use custom length byte instead of problematic usage of 52p format and make sure to encode('utf-8') for length
if util.enabled('broadcast_pack_text'):
data += struct.pack(FORMAT, timestamp, value, fee_fraction_int)
data += VarIntSerializer.serialize(len(text.encode('utf-8')))
data += text.encode('utf-8')
else:
if len(text) <= 52:
curr_format = FORMAT + '{}p'.format(len(text) + 1)
else:
curr_format = FORMAT + '{}s'.format(len(text))
data += struct.pack(curr_format, timestamp, value, fee_fraction_int,
text.encode('utf-8'))
return (source, [], data)
def compose (db, source, timestamp, value, fee_fraction, text):
# Store the fee fraction as an integer.
fee_fraction_int = int(fee_fraction * 1e8)
problems = validate(db, source, timestamp, value, fee_fraction_int, text, util.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
data = struct.pack(config.TXTYPE_FORMAT, ID)
# always use custom length byte instead of problematic usage of 52p format and make sure to encode('utf-8') for length
if util.enabled('broadcast_pack_text'):
data += struct.pack(FORMAT, timestamp, value, fee_fraction_int)
data += VarIntSerializer.serialize(len(text.encode('utf-8')))
data += text.encode('utf-8')
else:
if len(text) <= 52:
curr_format = FORMAT + '{}p'.format(len(text) + 1)
else:
curr_format = FORMAT + '{}s'.format(len(text))
data += struct.pack(curr_format, timestamp, value, fee_fraction_int, text.encode('utf-8'))
return (source, [], data)
def parse(db, tx, message):
cursor = db.cursor()
# Unpack message.
try:
if util.enabled("broadcast_pack_text"):
timestamp, value, fee_fraction_int, rawtext = struct.unpack(
FORMAT + "{}s".format(len(message) - LENGTH), message
)
textlen = VarIntSerializer.deserialize(rawtext)
text = rawtext[-textlen:]
assert len(text) == textlen
else:
if len(message) - LENGTH <= 52:
curr_format = FORMAT + "{}p".format(len(message) - LENGTH)
else:
curr_format = FORMAT + "{}s".format(len(message) - LENGTH)
timestamp, value, fee_fraction_int, text = struct.unpack(curr_format, message)
try:
text = text.decode("utf-8")
except UnicodeDecodeError:
text = ""
status = "valid"
except (struct.error) as e:
timestamp, value, fee_fraction_int, text = 0, None, 0, None
status = "invalid: could not unpack"
if status == "valid":
# For SQLite3
timestamp = min(timestamp, config.MAX_INT)
value = min(value, config.MAX_INT)
problems = validate(db, tx["source"], timestamp, value, fee_fraction_int, text, tx["block_index"])
if problems:
status = "invalid: " + "; ".join(problems)
# Lock?
lock = False
if text and text.lower() == "lock":
lock = True
timestamp, value, fee_fraction_int, text = 0, None, None, None
else:
lock = False
# Add parsed transaction to message-type–specific table.
bindings = {
"tx_index": tx["tx_index"],
"tx_hash": tx["tx_hash"],
"block_index": tx["block_index"],
"source": tx["source"],
"timestamp": timestamp,
"value": value,
"fee_fraction_int": fee_fraction_int,
"text": text,
"locked": lock,
"status": status,
}
if "integer overflow" not in status:
sql = "insert into broadcasts values(:tx_index, :tx_hash, :block_index, :source, :timestamp, :value, :fee_fraction_int, :text, :locked, :status)"
cursor.execute(sql, bindings)
else:
logger.warn("Not storing [broadcast] tx [%s]: %s" % (tx["tx_hash"], status))
logger.debug("Bindings: %s" % (json.dumps(bindings),))
# stop processing if broadcast is invalid for any reason
if util.enabled("broadcast_invalid_check") and status != "valid":
return
# Negative values (default to ignore).
if value is None or value < 0:
# Cancel Open Bets?
if value == -2:
cursor.execute(
"""SELECT * FROM bets \
WHERE (status = ? AND feed_address = ?)""",
("open", tx["source"]),
)
for i in list(cursor):
bet.cancel_bet(db, i, "dropped", tx["block_index"])
# Cancel Pending Bet Matches?
if value == -3:
cursor.execute(
"""SELECT * FROM bet_matches \
WHERE (status = ? AND feed_address = ?)""",
("pending", tx["source"]),
)
for bet_match in list(cursor):
bet.cancel_bet_match(db, bet_match, "dropped", tx["block_index"])
cursor.close()
return
# stop processing if broadcast is invalid for any reason
# @TODO: remove this check once broadcast_invalid_check has been activated
if util.enabled("max_fee_fraction") and status != "valid":
return
# Handle bet matches that use this feed.
cursor.execute(
"""SELECT * FROM bet_matches \
WHERE (status=? AND feed_address=?)
ORDER BY tx1_index ASC, tx0_index ASC""",
("pending", tx["source"]),
)
for bet_match in cursor.fetchall():
broadcast_bet_match_cursor = db.cursor()
bet_match_id = util.make_id(bet_match["tx0_hash"], bet_match["tx1_hash"])
bet_match_status = None
# Calculate total funds held in escrow and total fee to be paid if
# the bet match is settled. Escrow less fee is amount to be paid back
# to betters.
total_escrow = bet_match["forward_quantity"] + bet_match["backward_quantity"]
fee_fraction = fee_fraction_int / config.UNIT
fee = int(fee_fraction * total_escrow) # Truncate.
escrow_less_fee = total_escrow - fee
# Get known bet match type IDs.
cfd_type_id = util.BET_TYPE_ID["BullCFD"] + util.BET_TYPE_ID["BearCFD"]
equal_type_id = util.BET_TYPE_ID["Equal"] + util.BET_TYPE_ID["NotEqual"]
# Get the bet match type ID of this bet match.
bet_match_type_id = bet_match["tx0_bet_type"] + bet_match["tx1_bet_type"]
# Contract for difference, with determinate settlement date.
if bet_match_type_id == cfd_type_id:
# Recognise tx0, tx1 as the bull, bear (in the right direction).
if bet_match["tx0_bet_type"] < bet_match["tx1_bet_type"]:
bull_address = bet_match["tx0_address"]
bear_address = bet_match["tx1_address"]
bull_escrow = bet_match["forward_quantity"]
bear_escrow = bet_match["backward_quantity"]
else:
bull_address = bet_match["tx1_address"]
bear_address = bet_match["tx0_address"]
bull_escrow = bet_match["backward_quantity"]
bear_escrow = bet_match["forward_quantity"]
leverage = Fraction(bet_match["leverage"], 5040)
initial_value = bet_match["initial_value"]
bear_credit = bear_escrow - (value - initial_value) * leverage * config.UNIT
bull_credit = escrow_less_fee - bear_credit
bear_credit = round(bear_credit)
bull_credit = round(bull_credit)
# Liquidate, as necessary.
if bull_credit >= escrow_less_fee or bull_credit <= 0:
if bull_credit >= escrow_less_fee:
bull_credit = escrow_less_fee
bear_credit = 0
bet_match_status = "settled: liquidated for bull"
util.credit(
db,
bull_address,
config.XCP,
bull_credit,
action="bet {}".format(bet_match_status),
event=tx["tx_hash"],
)
elif bull_credit <= 0:
bull_credit = 0
bear_credit = escrow_less_fee
bet_match_status = "settled: liquidated for bear"
util.credit(
db,
bear_address,
config.XCP,
bear_credit,
action="bet {}".format(bet_match_status),
event=tx["tx_hash"],
)
# Pay fee to feed.
util.credit(db, bet_match["feed_address"], config.XCP, fee, action="feed fee", event=tx["tx_hash"])
# For logging purposes.
bindings = {
"bet_match_id": bet_match_id,
"bet_match_type_id": bet_match_type_id,
"block_index": tx["block_index"],
"settled": False,
"bull_credit": bull_credit,
"bear_credit": bear_credit,
"winner": None,
"escrow_less_fee": None,
"fee": fee,
}
sql = "insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)"
cursor.execute(sql, bindings)
# Settle (if not liquidated).
elif timestamp >= bet_match["deadline"]:
bet_match_status = "settled"
util.credit(
db,
bull_address,
config.XCP,
bull_credit,
action="bet {}".format(bet_match_status),
event=tx["tx_hash"],
)
util.credit(
db,
bear_address,
config.XCP,
bear_credit,
action="bet {}".format(bet_match_status),
event=tx["tx_hash"],
)
# Pay fee to feed.
util.credit(db, bet_match["feed_address"], config.XCP, fee, action="feed fee", event=tx["tx_hash"])
# For logging purposes.
bindings = {
"bet_match_id": bet_match_id,
"bet_match_type_id": bet_match_type_id,
"block_index": tx["block_index"],
"settled": True,
"bull_credit": bull_credit,
"bear_credit": bear_credit,
"winner": None,
"escrow_less_fee": None,
"fee": fee,
}
sql = "insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)"
cursor.execute(sql, bindings)
# Equal[/NotEqual] bet.
elif bet_match_type_id == equal_type_id and timestamp >= bet_match["deadline"]:
# Recognise tx0, tx1 as the bull, bear (in the right direction).
if bet_match["tx0_bet_type"] < bet_match["tx1_bet_type"]:
equal_address = bet_match["tx0_address"]
notequal_address = bet_match["tx1_address"]
else:
equal_address = bet_match["tx1_address"]
notequal_address = bet_match["tx0_address"]
# Decide who won, and credit appropriately.
if value == bet_match["target_value"]:
winner = "Equal"
bet_match_status = "settled: for equal"
util.credit(
db,
equal_address,
config.XCP,
escrow_less_fee,
action="bet {}".format(bet_match_status),
event=tx["tx_hash"],
)
else:
winner = "NotEqual"
bet_match_status = "settled: for notequal"
util.credit(
db,
notequal_address,
config.XCP,
escrow_less_fee,
action="bet {}".format(bet_match_status),
event=tx["tx_hash"],
)
# Pay fee to feed.
util.credit(db, bet_match["feed_address"], config.XCP, fee, action="feed fee", event=tx["tx_hash"])
# For logging purposes.
bindings = {
"bet_match_id": bet_match_id,
"bet_match_type_id": bet_match_type_id,
"block_index": tx["block_index"],
"settled": None,
"bull_credit": None,
"bear_credit": None,
"winner": winner,
"escrow_less_fee": escrow_less_fee,
"fee": fee,
}
sql = "insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)"
cursor.execute(sql, bindings)
# Update the bet match’s status.
if bet_match_status:
bindings = {
"status": bet_match_status,
"bet_match_id": util.make_id(bet_match["tx0_hash"], bet_match["tx1_hash"]),
}
sql = "update bet_matches set status = :status where id = :bet_match_id"
cursor.execute(sql, bindings)
log.message(db, tx["block_index"], "update", "bet_matches", bindings)
broadcast_bet_match_cursor.close()
cursor.close()
def parse(db, tx, message):
cursor = db.cursor()
# Unpack message.
try:
if util.enabled('broadcast_pack_text'):
timestamp, value, fee_fraction_int, rawtext = struct.unpack(
FORMAT + '{}s'.format(len(message) - LENGTH), message)
textlen = VarIntSerializer.deserialize(rawtext)
text = rawtext[-textlen:]
assert len(text) == textlen
else:
if len(message) - LENGTH <= 52:
curr_format = FORMAT + '{}p'.format(len(message) - LENGTH)
else:
curr_format = FORMAT + '{}s'.format(len(message) - LENGTH)
timestamp, value, fee_fraction_int, text = struct.unpack(
curr_format, message)
try:
text = text.decode('utf-8')
except UnicodeDecodeError:
text = ''
status = 'valid'
except (struct.error) as e:
timestamp, value, fee_fraction_int, text = 0, None, 0, None
status = 'invalid: could not unpack'
if status == 'valid':
# For SQLite3
timestamp = min(timestamp, config.MAX_INT)
value = min(value, config.MAX_INT)
problems = validate(db, tx['source'], timestamp, value,
fee_fraction_int, text, tx['block_index'])
if problems: status = 'invalid: ' + '; '.join(problems)
# Lock?
lock = False
if text and text.lower() == 'lock':
lock = True
timestamp, value, fee_fraction_int, text = 0, None, None, None
else:
lock = False
# Add parsed transaction to message-type–specific table.
bindings = {
'tx_index': tx['tx_index'],
'tx_hash': tx['tx_hash'],
'block_index': tx['block_index'],
'source': tx['source'],
'timestamp': timestamp,
'value': value,
'fee_fraction_int': fee_fraction_int,
'text': text,
'locked': lock,
'status': status,
}
if "integer overflow" not in status:
sql = 'insert into broadcasts values(:tx_index, :tx_hash, :block_index, :source, :timestamp, :value, :fee_fraction_int, :text, :locked, :status)'
cursor.execute(sql, bindings)
else:
logger.warn("Not storing [broadcast] tx [%s]: %s" %
(tx['tx_hash'], status))
logger.debug("Bindings: %s" % (json.dumps(bindings), ))
# stop processing if broadcast is invalid for any reason
if util.enabled('broadcast_invalid_check') and status != 'valid':
return
# Negative values (default to ignore).
if value is None or value < 0:
# Cancel Open Bets?
if value == -2:
cursor.execute(
'''SELECT * FROM bets \
WHERE (status = ? AND feed_address = ?)''',
('open', tx['source']))
for i in list(cursor):
bet.cancel_bet(db, i, 'dropped', tx['block_index'])
# Cancel Pending Bet Matches?
if value == -3:
cursor.execute(
'''SELECT * FROM bet_matches \
WHERE (status = ? AND feed_address = ?)''',
('pending', tx['source']))
for bet_match in list(cursor):
bet.cancel_bet_match(db, bet_match, 'dropped',
tx['block_index'])
cursor.close()
return
# stop processing if broadcast is invalid for any reason
# @TODO: remove this check once broadcast_invalid_check has been activated
if util.enabled('max_fee_fraction') and status != 'valid':
return
# Handle bet matches that use this feed.
cursor.execute(
'''SELECT * FROM bet_matches \
WHERE (status=? AND feed_address=?)
ORDER BY tx1_index ASC, tx0_index ASC''',
('pending', tx['source']))
for bet_match in cursor.fetchall():
broadcast_bet_match_cursor = db.cursor()
bet_match_id = util.make_id(bet_match['tx0_hash'],
bet_match['tx1_hash'])
bet_match_status = None
# Calculate total funds held in escrow and total fee to be paid if
# the bet match is settled. Escrow less fee is amount to be paid back
# to betters.
total_escrow = bet_match['forward_quantity'] + bet_match[
'backward_quantity']
fee_fraction = fee_fraction_int / config.UNIT
fee = int(fee_fraction * total_escrow) # Truncate.
escrow_less_fee = total_escrow - fee
# Get known bet match type IDs.
cfd_type_id = util.BET_TYPE_ID['BullCFD'] + util.BET_TYPE_ID['BearCFD']
equal_type_id = util.BET_TYPE_ID['Equal'] + util.BET_TYPE_ID['NotEqual']
# Get the bet match type ID of this bet match.
bet_match_type_id = bet_match['tx0_bet_type'] + bet_match[
'tx1_bet_type']
# Contract for difference, with determinate settlement date.
if bet_match_type_id == cfd_type_id:
# Recognise tx0, tx1 as the bull, bear (in the right direction).
if bet_match['tx0_bet_type'] < bet_match['tx1_bet_type']:
bull_address = bet_match['tx0_address']
bear_address = bet_match['tx1_address']
bull_escrow = bet_match['forward_quantity']
bear_escrow = bet_match['backward_quantity']
else:
bull_address = bet_match['tx1_address']
bear_address = bet_match['tx0_address']
bull_escrow = bet_match['backward_quantity']
bear_escrow = bet_match['forward_quantity']
leverage = Fraction(bet_match['leverage'], 5040)
initial_value = bet_match['initial_value']
bear_credit = bear_escrow - (
value - initial_value) * leverage * config.UNIT
bull_credit = escrow_less_fee - bear_credit
bear_credit = round(bear_credit)
bull_credit = round(bull_credit)
# Liquidate, as necessary.
if bull_credit >= escrow_less_fee or bull_credit <= 0:
if bull_credit >= escrow_less_fee:
bull_credit = escrow_less_fee
bear_credit = 0
bet_match_status = 'settled: liquidated for bull'
util.credit(db,
bull_address,
config.XCP,
bull_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
elif bull_credit <= 0:
bull_credit = 0
bear_credit = escrow_less_fee
bet_match_status = 'settled: liquidated for bear'
util.credit(db,
bear_address,
config.XCP,
bear_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db,
bet_match['feed_address'],
config.XCP,
fee,
action='feed fee',
event=tx['tx_hash'])
# For logging purposes.
bindings = {
'bet_match_id': bet_match_id,
'bet_match_type_id': bet_match_type_id,
'block_index': tx['block_index'],
'settled': False,
'bull_credit': bull_credit,
'bear_credit': bear_credit,
'winner': None,
'escrow_less_fee': None,
'fee': fee
}
sql = 'insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)'
cursor.execute(sql, bindings)
# Settle (if not liquidated).
elif timestamp >= bet_match['deadline']:
bet_match_status = 'settled'
util.credit(db,
bull_address,
config.XCP,
bull_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
util.credit(db,
bear_address,
config.XCP,
bear_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db,
bet_match['feed_address'],
config.XCP,
fee,
action='feed fee',
event=tx['tx_hash'])
# For logging purposes.
bindings = {
'bet_match_id': bet_match_id,
'bet_match_type_id': bet_match_type_id,
'block_index': tx['block_index'],
'settled': True,
'bull_credit': bull_credit,
'bear_credit': bear_credit,
'winner': None,
'escrow_less_fee': None,
'fee': fee
}
sql = 'insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)'
cursor.execute(sql, bindings)
# Equal[/NotEqual] bet.
elif bet_match_type_id == equal_type_id and timestamp >= bet_match[
'deadline']:
# Recognise tx0, tx1 as the bull, bear (in the right direction).
if bet_match['tx0_bet_type'] < bet_match['tx1_bet_type']:
equal_address = bet_match['tx0_address']
notequal_address = bet_match['tx1_address']
else:
equal_address = bet_match['tx1_address']
notequal_address = bet_match['tx0_address']
# Decide who won, and credit appropriately.
if value == bet_match['target_value']:
winner = 'Equal'
bet_match_status = 'settled: for equal'
util.credit(db,
equal_address,
config.XCP,
escrow_less_fee,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
else:
winner = 'NotEqual'
bet_match_status = 'settled: for notequal'
util.credit(db,
notequal_address,
config.XCP,
escrow_less_fee,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db,
bet_match['feed_address'],
config.XCP,
fee,
action='feed fee',
event=tx['tx_hash'])
# For logging purposes.
bindings = {
'bet_match_id': bet_match_id,
'bet_match_type_id': bet_match_type_id,
'block_index': tx['block_index'],
'settled': None,
'bull_credit': None,
'bear_credit': None,
'winner': winner,
'escrow_less_fee': escrow_less_fee,
'fee': fee
}
sql = 'insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)'
cursor.execute(sql, bindings)
# Update the bet match’s status.
if bet_match_status:
bindings = {
'status':
bet_match_status,
'bet_match_id':
util.make_id(bet_match['tx0_hash'], bet_match['tx1_hash'])
}
sql = 'update bet_matches set status = :status where id = :bet_match_id'
cursor.execute(sql, bindings)
log.message(db, tx['block_index'], 'update', 'bet_matches',
bindings)
broadcast_bet_match_cursor.close()
cursor.close()
def parse(db, tx, message):
cursor = db.cursor()
# Unpack message.
try:
if util.enabled('broadcast_pack_text'):
timestamp, value, fee_fraction_int, rawtext = struct.unpack(
FORMAT + '{}s'.format(len(message) - LENGTH), message)
textlen = VarIntSerializer.deserialize(rawtext)
text = rawtext[-textlen:]
assert len(text) == textlen
else:
if len(message) - LENGTH <= 52:
curr_format = FORMAT + '{}p'.format(len(message) - LENGTH)
else:
curr_format = FORMAT + '{}s'.format(len(message) - LENGTH)
timestamp, value, fee_fraction_int, text = struct.unpack(
curr_format, message)
try:
text = text.decode('utf-8')
except UnicodeDecodeError:
text = ''
status = 'valid'
except:
timestamp, value, fee_fraction_int, text = 0, None, 0, None
status = 'invalid: could not unpack'
if status == 'valid':
# For SQLite3
timestamp = min(timestamp, config.MAX_INT)
value = min(value, config.MAX_INT)
problems = validate(db, tx['source'], timestamp, value,
fee_fraction_int, text, tx['block_index'])
if problems:
status = 'invalid: ' + '; '.join(problems)
# Lock?
lock = False
if text and text.lower() == 'lock':
lock = True
timestamp, value, fee_fraction_int, text = 0, None, None, None
else:
lock = False
# Add parsed transaction to message-type–specific table.
bindings = {
'tx_index': tx['tx_index'],
'tx_hash': tx['tx_hash'],
'block_index': tx['block_index'],
'source': tx['source'],
'timestamp': timestamp,
'value': value,
'fee_fraction_int': fee_fraction_int,
'text': text,
'locked': lock,
'status': status,
}
if "integer overflow" not in status:
sql = 'insert into broadcasts values(:tx_index, :tx_hash, :block_index, :source, :timestamp, :value, :fee_fraction_int, :text, :locked, :status)'
cursor.execute(sql, bindings)
else:
logger.warn("Not storing [broadcast] tx [%s]: %s" %
(tx['tx_hash'], status))
logger.debug("Bindings: %s" % (json.dumps(bindings), ))
# stop processing if broadcast is invalid for any reason
if util.enabled('broadcast_invalid_check') and status != 'valid':
return
# Options? if the status is invalid the previous if should have catched it
if util.enabled('options_require_memo'):
if text and text.lower().startswith('options'):
ops_spl = text.split(" ")
if len(ops_spl) == 2:
change_ops = False
options_int = 0
try:
options_int = int(ops_spl.pop())
change_ops = True
except:
pass
if change_ops:
op_bindings = {
'block_index': tx['block_index'],
'address': tx['source'],
'options': options_int
}
sql = 'insert or replace into addresses(address, options, block_index) values(:address, :options, :block_index)'
cursor = db.cursor()
cursor.execute(sql, op_bindings)
# stop processing if broadcast is invalid for any reason
# @TODO: remove this check once broadcast_invalid_check has been activated
if util.enabled('max_fee_fraction') and status != 'valid':
return
cursor.close()
def parse (db, tx, message):
cursor = db.cursor()
# Unpack message.
try:
if util.enabled('broadcast_pack_text'):
timestamp, value, fee_fraction_int, rawtext = struct.unpack(FORMAT + '{}s'.format(len(message) - LENGTH), message)
textlen = VarIntSerializer.deserialize(rawtext)
text = rawtext[-textlen:]
assert len(text) == textlen
else:
if len(message) - LENGTH <= 52:
curr_format = FORMAT + '{}p'.format(len(message) - LENGTH)
else:
curr_format = FORMAT + '{}s'.format(len(message) - LENGTH)
timestamp, value, fee_fraction_int, text = struct.unpack(curr_format, message)
try:
text = text.decode('utf-8')
except UnicodeDecodeError:
text = ''
status = 'valid'
except (struct.error) as e:
timestamp, value, fee_fraction_int, text = 0, None, 0, None
status = 'invalid: could not unpack'
if status == 'valid':
# For SQLite3
timestamp = min(timestamp, config.MAX_INT)
value = min(value, config.MAX_INT)
problems = validate(db, tx['source'], timestamp, value, fee_fraction_int, text, tx['block_index'])
if problems: status = 'invalid: ' + '; '.join(problems)
# Lock?
lock = False
if text and text.lower() == 'lock':
lock = True
timestamp, value, fee_fraction_int, text = 0, None, None, None
else:
lock = False
# Add parsed transaction to message-type–specific table.
bindings = {
'tx_index': tx['tx_index'],
'tx_hash': tx['tx_hash'],
'block_index': tx['block_index'],
'source': tx['source'],
'timestamp': timestamp,
'value': value,
'fee_fraction_int': fee_fraction_int,
'text': text,
'locked': lock,
'status': status,
}
sql = 'insert into broadcasts values(:tx_index, :tx_hash, :block_index, :source, :timestamp, :value, :fee_fraction_int, :text, :locked, :status)'
cursor.execute(sql, bindings)
# stop processing if broadcast is invalid for any reason
if util.enabled('broadcast_invalid_check') and status != 'valid':
return
# Negative values (default to ignore).
if value is None or value < 0:
# Cancel Open Bets?
if value == -2:
cursor.execute('''SELECT * FROM bets \
WHERE (status = ? AND feed_address = ?)''',
('open', tx['source']))
for i in list(cursor):
bet.cancel_bet(db, i, 'dropped', tx['block_index'])
# Cancel Pending Bet Matches?
if value == -3:
cursor.execute('''SELECT * FROM bet_matches \
WHERE (status = ? AND feed_address = ?)''',
('pending', tx['source']))
for bet_match in list(cursor):
bet.cancel_bet_match(db, bet_match, 'dropped', tx['block_index'])
cursor.close()
return
# stop processing if broadcast is invalid for any reason
# @TODO: remove this check once broadcast_invalid_check has been activated
if util.enabled('max_fee_fraction') and status != 'valid':
return
# Handle bet matches that use this feed.
cursor.execute('''SELECT * FROM bet_matches \
WHERE (status=? AND feed_address=?)
ORDER BY tx1_index ASC, tx0_index ASC''',
('pending', tx['source']))
for bet_match in cursor.fetchall():
broadcast_bet_match_cursor = db.cursor()
bet_match_id = util.make_id(bet_match['tx0_hash'], bet_match['tx1_hash'])
bet_match_status = None
# Calculate total funds held in escrow and total fee to be paid if
# the bet match is settled. Escrow less fee is amount to be paid back
# to betters.
total_escrow = bet_match['forward_quantity'] + bet_match['backward_quantity']
fee_fraction = fee_fraction_int / config.UNIT
fee = int(fee_fraction * total_escrow) # Truncate.
escrow_less_fee = total_escrow - fee
# Get known bet match type IDs.
cfd_type_id = util.BET_TYPE_ID['BullCFD'] + util.BET_TYPE_ID['BearCFD']
equal_type_id = util.BET_TYPE_ID['Equal'] + util.BET_TYPE_ID['NotEqual']
# Get the bet match type ID of this bet match.
bet_match_type_id = bet_match['tx0_bet_type'] + bet_match['tx1_bet_type']
# Contract for difference, with determinate settlement date.
if bet_match_type_id == cfd_type_id:
# Recognise tx0, tx1 as the bull, bear (in the right direction).
if bet_match['tx0_bet_type'] < bet_match['tx1_bet_type']:
bull_address = bet_match['tx0_address']
bear_address = bet_match['tx1_address']
bull_escrow = bet_match['forward_quantity']
bear_escrow = bet_match['backward_quantity']
else:
bull_address = bet_match['tx1_address']
bear_address = bet_match['tx0_address']
bull_escrow = bet_match['backward_quantity']
bear_escrow = bet_match['forward_quantity']
leverage = Fraction(bet_match['leverage'], 5040)
initial_value = bet_match['initial_value']
bear_credit = bear_escrow - (value - initial_value) * leverage * config.UNIT
bull_credit = escrow_less_fee - bear_credit
bear_credit = round(bear_credit)
bull_credit = round(bull_credit)
# Liquidate, as necessary.
if bull_credit >= escrow_less_fee or bull_credit <= 0:
if bull_credit >= escrow_less_fee:
bull_credit = escrow_less_fee
bear_credit = 0
bet_match_status = 'settled: liquidated for bull'
util.credit(db, bull_address, config.XCP, bull_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
elif bull_credit <= 0:
bull_credit = 0
bear_credit = escrow_less_fee
bet_match_status = 'settled: liquidated for bear'
util.credit(db, bear_address, config.XCP, bear_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db, bet_match['feed_address'], config.XCP, fee, action='feed fee', event=tx['tx_hash'])
# For logging purposes.
bindings = {
'bet_match_id': bet_match_id,
'bet_match_type_id': bet_match_type_id,
'block_index': tx['block_index'],
'settled': False,
'bull_credit': bull_credit,
'bear_credit': bear_credit,
'winner': None,
'escrow_less_fee': None,
'fee': fee
}
sql='insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)'
cursor.execute(sql, bindings)
# Settle (if not liquidated).
elif timestamp >= bet_match['deadline']:
bet_match_status = 'settled'
util.credit(db, bull_address, config.XCP, bull_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
util.credit(db, bear_address, config.XCP, bear_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db, bet_match['feed_address'], config.XCP, fee, action='feed fee', event=tx['tx_hash'])
# For logging purposes.
bindings = {
'bet_match_id': bet_match_id,
'bet_match_type_id': bet_match_type_id,
'block_index': tx['block_index'],
'settled': True,
'bull_credit': bull_credit,
'bear_credit': bear_credit,
'winner': None,
'escrow_less_fee': None,
'fee': fee
}
sql='insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)'
cursor.execute(sql, bindings)
# Equal[/NotEqual] bet.
elif bet_match_type_id == equal_type_id and timestamp >= bet_match['deadline']:
# Recognise tx0, tx1 as the bull, bear (in the right direction).
if bet_match['tx0_bet_type'] < bet_match['tx1_bet_type']:
equal_address = bet_match['tx0_address']
notequal_address = bet_match['tx1_address']
else:
equal_address = bet_match['tx1_address']
notequal_address = bet_match['tx0_address']
# Decide who won, and credit appropriately.
if value == bet_match['target_value']:
winner = 'Equal'
bet_match_status = 'settled: for equal'
util.credit(db, equal_address, config.XCP, escrow_less_fee, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
else:
winner = 'NotEqual'
bet_match_status = 'settled: for notequal'
util.credit(db, notequal_address, config.XCP, escrow_less_fee, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db, bet_match['feed_address'], config.XCP, fee, action='feed fee', event=tx['tx_hash'])
# For logging purposes.
bindings = {
'bet_match_id': bet_match_id,
'bet_match_type_id': bet_match_type_id,
'block_index': tx['block_index'],
'settled': None,
'bull_credit': None,
'bear_credit': None,
'winner': winner,
'escrow_less_fee': escrow_less_fee,
'fee': fee
}
sql='insert into bet_match_resolutions values(:bet_match_id, :bet_match_type_id, :block_index, :settled, :bull_credit, :bear_credit, :winner, :escrow_less_fee, :fee)'
cursor.execute(sql, bindings)
# Update the bet match’s status.
if bet_match_status:
bindings = {
'status': bet_match_status,
'bet_match_id': util.make_id(bet_match['tx0_hash'], bet_match['tx1_hash'])
}
sql='update bet_matches set status = :status where id = :bet_match_id'
cursor.execute(sql, bindings)
log.message(db, tx['block_index'], 'update', 'bet_matches', bindings)
broadcast_bet_match_cursor.close()
cursor.close()
