def set_storage_data(self, contract_id, key, value):
# NOTE: This could all be done more elegantly, I think.
key = key.to_bytes(32, byteorder='big')
value = value.to_bytes(32, byteorder='big')
cursor = self.db.cursor()
cursor.execute('''SELECT * FROM storage WHERE contract_id = ? AND key = ?''', (contract_id, key))
storages = list(cursor)
if storages: # Update value.
bindings = {
'contract_id': contract_id,
'key': key,
'value': value
}
log.message(self.db, self.number, 'update', 'storage', bindings)
sql='''UPDATE storage SET value = :value WHERE contract_id = :contract_id AND key = :key'''
cursor.execute(sql, bindings)
else: # Insert value.
bindings = {
'contract_id': contract_id,
'key': key,
'value': value
}
log.message(self.db, self.number, 'insert', 'storage', bindings)
sql='''INSERT INTO storage VALUES (:contract_id, :key, :value)'''
cursor.execute(sql, bindings)
storages = cursor.execute('''SELECT * FROM storage WHERE contract_id = ? AND key = ?''', (contract_id, key))
return value
def cancel_bet_match(db, bet_match, status, block_index):
# Does not re‐open, re‐fill, etc. constituent bets.
cursor = db.cursor()
# Recredit tx0 address.
util.credit(db,
block_index,
bet_match['tx0_address'],
config.XCP,
bet_match['forward_quantity'],
action='recredit forward quantity',
event=bet_match['id'])
# Recredit tx1 address.
util.credit(db,
block_index,
bet_match['tx1_address'],
config.XCP,
bet_match['backward_quantity'],
action='recredit backward quantity',
event=bet_match['id'])
# Update status of bet match.
bindings = {'status': status, 'bet_match_id': bet_match['id']}
sql = 'update bet_matches set status = :status where id = :bet_match_id'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'bet_matches', bindings)
cursor.close()
def cancel_order (db, order, status, block_index):
cursor = db.cursor()
# Update status of order.
bindings = {
'status': status,
'tx_hash': order['tx_hash']
}
sql='update orders set status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'orders', bindings)
if order['give_asset'] != config.BTC: # Can’t credit BTC.
util.credit(db, block_index, order['source'], order['give_asset'], order['give_remaining'], action='cancel order', event=order['tx_hash'])
if status == 'expired':
# Record offer expiration.
bindings = {
'order_index': order['tx_index'],
'order_hash': order['tx_hash'],
'source': order['source'],
'block_index': block_index
}
sql='insert into order_expirations values(:order_index, :order_hash, :source, :block_index)'
cursor.execute(sql, bindings)
cursor.close()
def set_storage_data(self, contract_id, key, value):
# NOTE: This could all be done more elegantly, I think.
key = key.to_bytes(32, byteorder='big')
value = value.to_bytes(32, byteorder='big')
cursor = self.db.cursor()
cursor.execute(
'''SELECT * FROM storage WHERE contract_id = ? AND key = ?''',
(contract_id, key))
storages = list(cursor)
if storages: # Update value.
bindings = {'contract_id': contract_id, 'key': key, 'value': value}
log.message(self.db, self.number, 'update', 'storage', bindings)
sql = '''UPDATE storage SET value = :value WHERE contract_id = :contract_id AND key = :key'''
cursor.execute(sql, bindings)
else: # Insert value.
bindings = {'contract_id': contract_id, 'key': key, 'value': value}
log.message(self.db, self.number, 'insert', 'storage', bindings)
sql = '''INSERT INTO storage VALUES (:contract_id, :key, :value)'''
cursor.execute(sql, bindings)
storages = cursor.execute(
'''SELECT * FROM storage WHERE contract_id = ? AND key = ?''',
(contract_id, key))
return value
def update_rps_match_status (db, rps_match, status, block_index):
cursor = db.cursor()
if status in ['expired', 'concluded: tie']:
# Recredit tx0 address.
util.credit(db, block_index, rps_match['tx0_address'], 'XCP',
rps_match['wager'], action='recredit wager', event=rps_match['id'])
# Recredit tx1 address.
util.credit(db, block_index, rps_match['tx1_address'], 'XCP',
rps_match['wager'], action='recredit wager', event=rps_match['id'])
elif status.startswith('concluded'):
# Credit the winner
winner = rps_match['tx0_address'] if status == 'concluded: first player wins' else rps_match['tx1_address']
util.credit(db, block_index, winner, 'XCP',
2 * rps_match['wager'], action='wins', event=rps_match['id'])
# Update status of rps match.
bindings = {
'status': status,
'rps_match_id': rps_match['id']
}
sql='UPDATE rps_matches SET status = :status WHERE id = :rps_match_id'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'rps_matches', bindings)
cursor.close()
def del_account(self, suicide):
cursor = self.db.cursor()
contract_id = suicide['contract_id']
logger.debug('SUICIDING {}'.format(contract_id))
bindings = {'contract_id': contract_id}
log.message(self.db, self.number, 'delete', 'contracts', bindings)
cursor.execute('''DELETE FROM contracts WHERE contract_id = :contract_id''', bindings)
log.message(self.db, self.number, 'delete', 'storage', bindings)
cursor.execute('''DELETE FROM storage WHERE contract_id = :contract_id''', bindings)
def parse (db, tx, message):
cursor = db.cursor()
# Unpack message.
try:
if len(message) != LENGTH:
raise exceptions.UnpackError
tx0_hash_bytes, tx1_hash_bytes = struct.unpack(FORMAT, message)
tx0_hash, tx1_hash = binascii.hexlify(tx0_hash_bytes).decode('utf-8'), binascii.hexlify(tx1_hash_bytes).decode('utf-8')
order_match_id = util.make_id(tx0_hash, tx1_hash)
status = 'valid'
except (exceptions.UnpackError, struct.error) as e:
tx0_hash, tx1_hash, order_match_id = None, None, None
status = 'invalid: could not unpack'
if status == 'valid':
destination, btc_quantity, escrowed_asset, escrowed_quantity, order_match, problems = validate(db, tx['source'], order_match_id, tx['block_index'])
if problems:
order_match = None
status = 'invalid: ' + '; '.join(problems)
if status == 'valid':
# BTC must be paid all at once.
if tx['btc_amount'] >= btc_quantity:
# Credit source address for the currency that he bought with the bitcoins.
util.credit(db, tx['block_index'], tx['source'], escrowed_asset, escrowed_quantity, action='btcpay', event=tx['tx_hash'])
status = 'valid'
# Update order match.
bindings = {
'status': 'completed',
'order_match_id': order_match_id
}
sql='update order_matches set status = :status where id = :order_match_id'
cursor.execute(sql, bindings)
log.message(db, tx['block_index'], 'update', 'order_matches', bindings)
# 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'],
'destination': tx['destination'],
'btc_amount': tx['btc_amount'],
'order_match_id': order_match_id,
'status': status,
}
sql='insert into btcpays values(:tx_index, :tx_hash, :block_index, :source, :destination, :btc_amount, :order_match_id, :status)'
cursor.execute(sql, bindings)
cursor.close()
def set_nonce(self, address, nonce):
cursor = self.db.cursor()
cursor.execute('''SELECT * FROM nonces WHERE (address = :address)''', {'address': address})
nonces = list(cursor)
bindings = {'address': address, 'nonce': nonce}
if not nonces:
log.message(self.db, self.number, 'insert', 'nonces', bindings)
cursor.execute('''INSERT INTO nonces VALUES(:address, :nonce)''', bindings)
else:
log.message(self.db, self.number, 'update', 'nonces', bindings)
cursor.execute('''UPDATE nonces SET nonce = :nonce WHERE (address = :address)''', bindings)
def del_account(self, contract_id):
cursor = self.db.cursor()
logger.debug('SUICIDING {}'.format(contract_id))
bindings = {'contract_id': contract_id}
log.message(self.db, self.number, 'delete', 'contracts', bindings)
cursor.execute(
'''DELETE FROM contracts WHERE contract_id = :contract_id''',
bindings)
log.message(self.db, self.number, 'delete', 'storage', bindings)
cursor.execute(
'''DELETE FROM storage WHERE contract_id = :contract_id''',
bindings)
def cancel_bet (db, bet, status, block_index):
cursor = db.cursor()
# Update status of bet.
bindings = {
'status': status,
'tx_hash': bet['tx_hash']
}
sql='update bets set status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'bets', bindings)
util.credit(db, block_index, bet['source'], config.XCP, bet['wager_remaining'], action='recredit wager remaining', event=bet['tx_hash'])
cursor = db.cursor()
def cancel_rps (db, rps, status, block_index):
cursor = db.cursor()
# Update status of rps.
bindings = {
'status': status,
'tx_hash': rps['tx_hash']
}
sql='''UPDATE rps SET status = :status WHERE tx_hash = :tx_hash'''
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'rps', bindings)
util.credit(db, block_index, rps['source'], 'XCP', rps['wager'], action='recredit wager', event=rps['tx_hash'])
cursor.close()
def set_nonce(self, address, nonce):
cursor = self.db.cursor()
cursor.execute('''SELECT * FROM nonces WHERE (address = :address)''',
{'address': address})
nonces = list(cursor)
bindings = {'address': address, 'nonce': nonce}
if not nonces:
log.message(self.db, self.number, 'insert', 'nonces', bindings)
cursor.execute('''INSERT INTO nonces VALUES(:address, :nonce)''',
bindings)
else:
log.message(self.db, self.number, 'update', 'nonces', bindings)
cursor.execute(
'''UPDATE nonces SET nonce = :nonce WHERE (address = :address)''',
bindings)
def cancel_bet(db, bet, status, block_index):
cursor = db.cursor()
# Update status of bet.
bindings = {'status': status, 'tx_hash': bet['tx_hash']}
sql = 'update bets set status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'bets', bindings)
util.credit(db,
block_index,
bet['source'],
config.XCP,
bet['wager_remaining'],
action='recredit wager remaining',
event=bet['tx_hash'])
cursor = db.cursor()
def exectracer(cursor, sql, bindings):
# This means that all changes to database must use a very simple syntax.
# TODO: Need sanity checks here.
sql = sql.lower()
# Parse SQL.
array = sql.split('(')[0].split(' ')
command = array[0]
if 'insert' in sql:
category = array[2]
elif 'update' in sql:
category = array[1]
else:
return True
db = cursor.getconnection()
dictionary = {
'command': command,
'category': category,
'bindings': bindings
}
# Skip blocks, transactions.
if 'blocks' in sql or 'transactions' in sql: return True
# Record alteration in database.
if category not in ('balances', 'messages', 'mempool', 'assets'):
if category not in ('suicides',
'postqueue'): # These tables are ephemeral.
if category not in ('nonces', 'storage'): # List message manually.
if not (command in ('update') and category
in ('orders', 'bets', 'rps', 'order_matches',
'bet_matches', 'rps_matches',
'contracts')): # List message manually.
# try:
log.message(db, bindings['block_index'], command, category,
bindings)
# except:
# raise TypeError('SQLite3 statements must used named arguments.')
return True
def cancel_bet_match (db, bet_match, status, block_index):
# Does not re‐open, re‐fill, etc. constituent bets.
cursor = db.cursor()
# Recredit tx0 address.
util.credit(db, block_index, bet_match['tx0_address'], config.XCP,
bet_match['forward_quantity'], action='recredit forward quantity', event=bet_match['id'])
# Recredit tx1 address.
util.credit(db, block_index, bet_match['tx1_address'], config.XCP,
bet_match['backward_quantity'], action='recredit backward quantity', event=bet_match['id'])
# Update status of bet match.
bindings = {
'status': status,
'bet_match_id': bet_match['id']
}
sql='update bet_matches set status = :status where id = :bet_match_id'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'bet_matches', bindings)
cursor.close()
def match(db, tx):
cursor = db.cursor()
# Get bet in question.
bets = list(
cursor.execute(
'''SELECT * FROM bets\
WHERE (tx_index = ? AND status = ?)''',
(tx['tx_index'], 'open')))
if not bets:
cursor.close()
return
else:
assert len(bets) == 1
tx1 = bets[0]
# Get counterbet_type.
if tx1['bet_type'] % 2: counterbet_type = tx1['bet_type'] - 1
else: counterbet_type = tx1['bet_type'] + 1
feed_address = tx1['feed_address']
cursor.execute(
'''SELECT * FROM bets\
WHERE (feed_address=? AND status=? AND bet_type=?)''',
(tx1['feed_address'], 'open', counterbet_type))
tx1_wager_remaining = tx1['wager_remaining']
tx1_counterwager_remaining = tx1['counterwager_remaining']
bet_matches = cursor.fetchall()
if tx['block_index'] > 284500 or config.TESTNET: # Protocol change.
sorted(bet_matches,
key=lambda x: x['tx_index']) # Sort by tx index second.
sorted(bet_matches,
key=lambda x: util.price(x['wager_quantity'], x[
'counterwager_quantity'], tx1['block_index'])
) # Sort by price first.
tx1_status = tx1['status']
for tx0 in bet_matches:
if tx1_status != 'open': break
logger.debug('Considering: ' + tx0['tx_hash'])
tx0_wager_remaining = tx0['wager_remaining']
tx0_counterwager_remaining = tx0['counterwager_remaining']
# Bet types must be opposite.
if counterbet_type != tx0['bet_type']:
logger.debug('Skipping: bet types disagree.')
continue
# Leverages must agree exactly
if tx0['leverage'] != tx1['leverage']:
logger.debug('Skipping: leverages disagree.')
continue
# Target values must agree exactly.
if tx0['target_value'] != tx1['target_value']:
logger.debug('Skipping: target values disagree.')
continue
# Fee fractions must agree exactly.
if tx0['fee_fraction_int'] != tx1['fee_fraction_int']:
logger.debug('Skipping: fee fractions disagree.')
continue
# Deadlines must agree exactly.
if tx0['deadline'] != tx1['deadline']:
logger.debug('Skipping: deadlines disagree.')
continue
# If the odds agree, make the trade. The found order sets the odds,
# and they trade as much as they can.
tx0_odds = util.price(tx0['wager_quantity'],
tx0['counterwager_quantity'], tx1['block_index'])
tx0_inverse_odds = util.price(tx0['counterwager_quantity'],
tx0['wager_quantity'],
tx1['block_index'])
tx1_odds = util.price(tx1['wager_quantity'],
tx1['counterwager_quantity'], tx1['block_index'])
if tx['block_index'] < 286000:
tx0_inverse_odds = util.price(
1, tx0_odds, tx1['block_index']) # Protocol change.
logger.debug('Tx0 Inverse Odds: {}; Tx1 Odds: {}'.format(
float(tx0_inverse_odds), float(tx1_odds)))
if tx0_inverse_odds > tx1_odds:
logger.debug('Skipping: price mismatch.')
else:
logger.debug('Potential forward quantities: {}, {}'.format(
tx0_wager_remaining,
int(
util.price(tx1_wager_remaining, tx1_odds,
tx1['block_index']))))
forward_quantity = int(
min(
tx0_wager_remaining,
int(
util.price(tx1_wager_remaining, tx1_odds,
tx1['block_index']))))
logger.debug('Forward Quantity: {}'.format(forward_quantity))
backward_quantity = round(forward_quantity / tx0_odds)
logger.debug('Backward Quantity: {}'.format(backward_quantity))
if not forward_quantity:
logger.debug('Skipping: zero forward quantity.')
continue
if tx1['block_index'] >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logger.debug('Skipping: zero backward quantity.')
continue
bet_match_id = util.make_id(tx0['tx_hash'], tx1['tx_hash'])
# Debit the order.
# Counterwager remainings may be negative.
tx0_wager_remaining = tx0_wager_remaining - forward_quantity
tx0_counterwager_remaining = tx0_counterwager_remaining - backward_quantity
tx1_wager_remaining = tx1_wager_remaining - backward_quantity
tx1_counterwager_remaining = tx1_counterwager_remaining - forward_quantity
# tx0
tx0_status = 'open'
if tx0_wager_remaining <= 0 or tx0_counterwager_remaining <= 0:
# Fill order, and recredit give_remaining.
tx0_status = 'filled'
util.credit(db,
tx1['block_index'],
tx0['source'],
config.XCP,
tx0_wager_remaining,
event=tx1['tx_hash'],
action='filled')
bindings = {
'wager_remaining': tx0_wager_remaining,
'counterwager_remaining': tx0_counterwager_remaining,
'status': tx0_status,
'tx_hash': tx0['tx_hash']
}
sql = 'update bets set wager_remaining = :wager_remaining, counterwager_remaining = :counterwager_remaining, status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, tx1['block_index'], 'update', 'bets', bindings)
if tx1['block_index'] >= 292000 or config.TESTNET: # Protocol change
if tx1_wager_remaining <= 0 or tx1_counterwager_remaining <= 0:
# Fill order, and recredit give_remaining.
tx1_status = 'filled'
util.credit(db,
tx1['block_index'],
tx1['source'],
config.XCP,
tx1_wager_remaining,
event=tx1['tx_hash'],
action='filled')
# tx1
bindings = {
'wager_remaining': tx1_wager_remaining,
'counterwager_remaining': tx1_counterwager_remaining,
'status': tx1_status,
'tx_hash': tx1['tx_hash']
}
sql = 'update bets set wager_remaining = :wager_remaining, counterwager_remaining = :counterwager_remaining, status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, tx1['block_index'], 'update', 'bets', bindings)
# Get last value of feed.
broadcasts = list(
cursor.execute(
'''SELECT * FROM broadcasts WHERE (status = ? AND source = ?) ORDER BY tx_index ASC''',
('valid', feed_address)))
initial_value = broadcasts[-1]['value']
# Record bet fulfillment.
bindings = {
'id': util.make_id(tx0['tx_hash'], tx['tx_hash']),
'tx0_index': tx0['tx_index'],
'tx0_hash': tx0['tx_hash'],
'tx0_address': tx0['source'],
'tx1_index': tx1['tx_index'],
'tx1_hash': tx1['tx_hash'],
'tx1_address': tx1['source'],
'tx0_bet_type': tx0['bet_type'],
'tx1_bet_type': tx1['bet_type'],
'feed_address': tx1['feed_address'],
'initial_value': initial_value,
'deadline': tx1['deadline'],
'target_value': tx1['target_value'],
'leverage': tx1['leverage'],
'forward_quantity': forward_quantity,
'backward_quantity': backward_quantity,
'tx0_block_index': tx0['block_index'],
'tx1_block_index': tx1['block_index'],
'block_index': max(tx0['block_index'], tx1['block_index']),
'tx0_expiration': tx0['expiration'],
'tx1_expiration': tx1['expiration'],
'match_expire_index': min(tx0['expire_index'],
tx1['expire_index']),
'fee_fraction_int': tx1['fee_fraction_int'],
'status': 'pending',
}
sql = 'insert into bet_matches values(:id, :tx0_index, :tx0_hash, :tx0_address, :tx1_index, :tx1_hash, :tx1_address, :tx0_bet_type, :tx1_bet_type, :feed_address, :initial_value, :deadline, :target_value, :leverage, :forward_quantity, :backward_quantity, :tx0_block_index, :tx1_block_index, :block_index, :tx0_expiration, :tx1_expiration, :match_expire_index, :fee_fraction_int, :status)'
cursor.execute(sql, bindings)
cursor.close()
return
def match (db, tx, block_index):
cursor = db.cursor()
# Get rps in question.
rps = list(cursor.execute('''SELECT * FROM rps WHERE tx_index = ? AND status = ?''', (tx['tx_index'], 'open')))
if not rps:
cursor.close()
return
else:
assert len(rps) == 1
tx1 = rps[0]
possible_moves = tx1['possible_moves']
wager = tx1['wager']
tx1_status = 'open'
# Get rps match
bindings = (possible_moves, 'open', wager, tx1['source'])
# dont match twice same RPS
already_matched = []
old_rps_matches = cursor.execute('''SELECT * FROM rps_matches WHERE tx0_hash = ? OR tx1_hash = ?''', (tx1['tx_hash'], tx1['tx_hash']))
for old_rps_match in old_rps_matches:
counter_tx_hash = old_rps_match['tx1_hash'] if tx1['tx_hash'] == old_rps_match['tx0_hash'] else old_rps_match['tx0_hash']
already_matched.append(counter_tx_hash)
already_matched_cond = ''
if already_matched:
already_matched_cond = '''AND tx_hash NOT IN ({})'''.format(','.join(['?' for e in range(0, len(already_matched))]))
bindings += tuple(already_matched)
sql = '''SELECT * FROM rps WHERE (possible_moves = ? AND status = ? AND wager = ? AND source != ? {}) ORDER BY tx_index LIMIT 1'''.format(already_matched_cond)
rps_matches = list(cursor.execute(sql, bindings))
if rps_matches:
tx0 = rps_matches[0]
# update status
for txn in [tx0, tx1]:
bindings = {
'status': 'matched',
'tx_index': txn['tx_index']
}
cursor.execute('''UPDATE rps SET status = :status WHERE tx_index = :tx_index''', bindings)
log.message(db, block_index, 'update', 'rps', bindings)
bindings = {
'id': util.make_id(tx0['tx_hash'], tx1['tx_hash']),
'tx0_index': tx0['tx_index'],
'tx0_hash': tx0['tx_hash'],
'tx0_address': tx0['source'],
'tx1_index': tx1['tx_index'],
'tx1_hash': tx1['tx_hash'],
'tx1_address': tx1['source'],
'tx0_move_random_hash': tx0['move_random_hash'],
'tx1_move_random_hash': tx1['move_random_hash'],
'wager': wager,
'possible_moves': possible_moves,
'tx0_block_index': tx0['block_index'],
'tx1_block_index': tx1['block_index'],
'block_index': block_index,
'tx0_expiration': tx0['expiration'],
'tx1_expiration': tx1['expiration'],
'match_expire_index': block_index + 20,
'status': 'pending'
}
sql = '''INSERT INTO rps_matches VALUES (:id, :tx0_index, :tx0_hash, :tx0_address, :tx1_index, :tx1_hash, :tx1_address,
:tx0_move_random_hash, :tx1_move_random_hash, :wager, :possible_moves,
:tx0_block_index, :tx1_block_index, :block_index, :tx0_expiration, :tx1_expiration,
:match_expire_index, :status)'''
cursor.execute(sql, bindings)
cursor.close()
def cancel_order_match (db, order_match, status, block_index):
'''The only cancelling is an expiration.
'''
cursor = db.cursor()
# Skip order matches just expired as a penalty. (Not very efficient.)
if not (block_index >= 314250 or config.TESTNET): # Protocol change.
order_matches = list(cursor.execute('''SELECT * FROM order_matches \
WHERE (id = ? AND status = ?)''',
(order_match['id'], 'expired')))
if order_matches:
cursor.close()
return
# Update status of order match.
bindings = {
'status': status,
'order_match_id': order_match['id']
}
sql='update order_matches set status = :status where id = :order_match_id'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'order_matches', bindings)
order_match_id = util.make_id(order_match['tx0_hash'], order_match['tx1_hash'])
# If tx0 is dead, credit address directly; if not, replenish give remaining, get remaining, and fee required remaining.
orders = list(cursor.execute('''SELECT * FROM orders \
WHERE tx_index = ?''',
(order_match['tx0_index'],)))
assert len(orders) == 1
tx0_order = orders[0]
if tx0_order['status'] in ('expired', 'cancelled'):
tx0_order_status = tx0_order['status']
if order_match['forward_asset'] != config.BTC:
util.credit(db, block_index, order_match['tx0_address'],
order_match['forward_asset'],
order_match['forward_quantity'], action='order {}'.format(tx0_order_status), event=order_match['id'])
else:
tx0_give_remaining = tx0_order['give_remaining'] + order_match['forward_quantity']
tx0_get_remaining = tx0_order['get_remaining'] + order_match['backward_quantity']
if tx0_order['get_asset'] == config.BTC and (block_index >= 297000 or config.TESTNET): # Protocol change.
tx0_fee_required_remaining = tx0_order['fee_required_remaining'] + order_match['fee_paid']
else:
tx0_fee_required_remaining = tx0_order['fee_required_remaining']
tx0_order_status = tx0_order['status']
bindings = {
'give_remaining': tx0_give_remaining,
'get_remaining': tx0_get_remaining,
'status': tx0_order_status,
'fee_required_remaining': tx0_fee_required_remaining,
'tx_hash': order_match['tx0_hash']
}
sql='update orders set give_remaining = :give_remaining, get_remaining = :get_remaining, fee_required_remaining = :fee_required_remaining where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'orders', bindings)
# If tx1 is dead, credit address directly; if not, replenish give remaining, get remaining, and fee required remaining.
orders = list(cursor.execute('''SELECT * FROM orders \
WHERE tx_index = ?''',
(order_match['tx1_index'],)))
assert len(orders) == 1
tx1_order = orders[0]
if tx1_order['status'] in ('expired', 'cancelled'):
tx1_order_status = tx1_order['status']
if order_match['backward_asset'] != config.BTC:
util.credit(db, block_index, order_match['tx1_address'],
order_match['backward_asset'],
order_match['backward_quantity'], action='order {}'.format(tx1_order_status), event=order_match['id'])
else:
tx1_give_remaining = tx1_order['give_remaining'] + order_match['backward_quantity']
tx1_get_remaining = tx1_order['get_remaining'] + order_match['forward_quantity']
if tx1_order['get_asset'] == config.BTC and (block_index >= 297000 or config.TESTNET): # Protocol change.
tx1_fee_required_remaining = tx1_order['fee_required_remaining'] + order_match['fee_paid']
else:
tx1_fee_required_remaining = tx1_order['fee_required_remaining']
tx1_order_status = tx1_order['status']
bindings = {
'give_remaining': tx1_give_remaining,
'get_remaining': tx1_get_remaining,
'status': tx1_order_status,
'fee_required_remaining': tx1_fee_required_remaining,
'tx_hash': order_match['tx1_hash']
}
sql='update orders set give_remaining = :give_remaining, get_remaining = :get_remaining, fee_required_remaining = :fee_required_remaining where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'orders', bindings)
if block_index < 286500: # Protocol change.
# Sanity check: one of the two must have expired.
tx0_order_time_left = tx0_order['expire_index'] - block_index
tx1_order_time_left = tx1_order['expire_index'] - block_index
assert tx0_order_time_left or tx1_order_time_left
# Penalize tardiness.
if block_index >= 313900 or config.TESTNET: # Protocol change.
if tx0_order['status'] == 'expired' and order_match['forward_asset'] == config.BTC:
exact_penalty(db, order_match['tx0_address'], block_index, order_match['id'])
if tx1_order['status'] == 'expired' and order_match['backward_asset'] == config.BTC:
exact_penalty(db, order_match['tx1_address'], block_index, order_match['id'])
# Re‐match.
if block_index >= 310000 or config.TESTNET: # Protocol change.
if not (block_index >= 315000 or config.TESTNET): # Protocol change.
cursor.execute('''SELECT * FROM transactions\
WHERE tx_hash = ?''', (tx0_order['tx_hash'],))
match(db, list(cursor)[0], block_index)
cursor.execute('''SELECT * FROM transactions\
WHERE tx_hash = ?''', (tx1_order['tx_hash'],))
match(db, list(cursor)[0], block_index)
if status == 'expired':
# Record order match expiration.
bindings = {
'order_match_id': order_match['id'],
'tx0_address': order_match['tx0_address'],
'tx1_address': order_match['tx1_address'],
'block_index': block_index
}
sql='insert into order_match_expirations values(:order_match_id, :tx0_address, :tx1_address, :block_index)'
cursor.execute(sql, bindings)
cursor.close()
def parse(db, tx, message):
cursor = db.cursor()
# Unpack message.
try:
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)
# Negative values (default to ignore).
if value == 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
# 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,
tx['block_index'],
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,
tx['block_index'],
bear_address,
config.XCP,
bear_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db,
tx['block_index'],
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,
tx['block_index'],
bull_address,
config.XCP,
bull_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
util.credit(db,
tx['block_index'],
bear_address,
config.XCP,
bear_credit,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db,
tx['block_index'],
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,
tx['block_index'],
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,
tx['block_index'],
notequal_address,
config.XCP,
escrow_less_fee,
action='bet {}'.format(bet_match_status),
event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db,
tx['block_index'],
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 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)
# Negative values (default to ignore).
if value == 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
# 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, tx['block_index'], 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, tx['block_index'], bear_address, config.XCP, bear_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db, tx['block_index'], 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, tx['block_index'], bull_address, config.XCP, bull_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
util.credit(db, tx['block_index'], bear_address, config.XCP, bear_credit, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db, tx['block_index'], 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, tx['block_index'], 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, tx['block_index'], notequal_address, config.XCP, escrow_less_fee, action='bet {}'.format(bet_match_status), event=tx['tx_hash'])
# Pay fee to feed.
util.credit(db, tx['block_index'], 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 match (db, tx, block_index=None):
cursor = db.cursor()
# Get order in question.
orders = list(cursor.execute('''SELECT * FROM orders\
WHERE (tx_index = ? AND status = ?)''', (tx['tx_index'], 'open')))
if not orders:
cursor.close()
return
else:
assert len(orders) == 1
tx1 = orders[0]
cursor.execute('''SELECT * FROM orders \
WHERE (give_asset=? AND get_asset=? AND status=? AND tx_hash != ?)''',
(tx1['get_asset'], tx1['give_asset'], 'open', tx1['tx_hash']))
tx1_give_remaining = tx1['give_remaining']
tx1_get_remaining = tx1['get_remaining']
order_matches = cursor.fetchall()
if tx['block_index'] > 284500 or config.TESTNET: # Protocol change.
order_matches = sorted(order_matches, key=lambda x: x['tx_index']) # Sort by tx index second.
order_matches = sorted(order_matches, key=lambda x: util.price(x['get_quantity'], x['give_quantity'], tx1['block_index'])) # Sort by price first.
# Get fee remaining.
tx1_fee_required_remaining = tx1['fee_required_remaining']
tx1_fee_provided_remaining = tx1['fee_provided_remaining']
tx1_status = tx1['status']
for tx0 in order_matches:
order_match_id = util.make_id(tx0['tx_hash'], tx1['tx_hash'])
if not block_index:
block_index = max(tx0['block_index'], tx1['block_index'])
if tx1_status != 'open': break
logger.debug('Considering: ' + tx0['tx_hash'])
tx0_give_remaining = tx0['give_remaining']
tx0_get_remaining = tx0['get_remaining']
# Ignore previous matches. (Both directions, just to be sure.)
cursor.execute('''SELECT * FROM order_matches
WHERE id = ? ''', (util.make_id(tx0['tx_hash'], tx1['tx_hash']), ))
if list(cursor):
logger.debug('Skipping: previous match')
continue
cursor.execute('''SELECT * FROM order_matches
WHERE id = ? ''', (util.make_id(tx1['tx_hash'], tx0['tx_hash']), ))
if list(cursor):
logger.debug('Skipping: previous match')
continue
# Get fee provided remaining.
tx0_fee_required_remaining = tx0['fee_required_remaining']
tx0_fee_provided_remaining = tx0['fee_provided_remaining']
# Make sure that that both orders still have funds remaining (if order involves BTC, and so cannot be ‘filled’).
if tx0['give_asset'] == config.BTC or tx0['get_asset'] == config.BTC: # Gratuitous
if tx0_give_remaining <= 0 or tx1_give_remaining <= 0:
logger.debug('Skipping: negative give quantity remaining')
continue
if block_index >= 292000 and block_index <= 310500 and not config.TESTNET: # Protocol changes
if tx0_get_remaining <= 0 or tx1_get_remaining <= 0:
logger.debug('Skipping: negative get quantity remaining')
continue
if block_index >= 294000 or config.TESTNET: # Protocol change.
if tx0['fee_required_remaining'] < 0:
logger.debug('Skipping: negative tx0 fee required remaining')
continue
if tx0['fee_provided_remaining'] < 0:
logger.debug('Skipping: negative tx0 fee provided remaining')
continue
if tx1_fee_provided_remaining < 0:
logger.debug('Skipping: negative tx1 fee provided remaining')
continue
if tx1_fee_required_remaining < 0:
logger.debug('Skipping: negative tx1 fee required remaining')
continue
# If the prices agree, make the trade. The found order sets the price,
# and they trade as much as they can.
tx0_price = util.price(tx0['get_quantity'], tx0['give_quantity'], block_index)
tx1_price = util.price(tx1['get_quantity'], tx1['give_quantity'], block_index)
tx1_inverse_price = util.price(tx1['give_quantity'], tx1['get_quantity'], block_index)
# Protocol change.
if tx['block_index'] < 286000: tx1_inverse_price = util.price(1, tx1_price, block_index)
logger.debug('Tx0 Price: {}; Tx1 Inverse Price: {}'.format(float(tx0_price), float(tx1_inverse_price)))
if tx0_price > tx1_inverse_price:
logger.debug('Skipping: price mismatch.')
else:
logger.debug('Potential forward quantities: {}, {}'.format(tx0_give_remaining, int(util.price(tx1_give_remaining, tx0_price, block_index))))
forward_quantity = int(min(tx0_give_remaining, int(util.price(tx1_give_remaining, tx0_price, block_index))))
logger.debug('Forward Quantity: {}'.format(forward_quantity))
backward_quantity = round(forward_quantity * tx0_price)
logger.debug('Backward Quantity: {}'.format(backward_quantity))
if not forward_quantity:
logger.debug('Skipping: zero forward quantity.')
continue
if block_index >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logger.debug('Skipping: zero backward quantity.')
continue
forward_asset, backward_asset = tx1['get_asset'], tx1['give_asset']
if block_index >= 313900 or config.TESTNET: # Protocol change.
min_btc_quantity = 0.001 * config.UNIT # 0.001 BTC
if (forward_asset == config.BTC and forward_quantity <= min_btc_quantity) or (backward_asset == config.BTC and backward_quantity <= min_btc_quantity):
logger.debug('Skipping: below minimum {} quantity'.format(config.BTC))
continue
# Check and update fee remainings.
fee = 0
if block_index >= 286500 or config.TESTNET: # Protocol change. Deduct fee_required from provided_remaining, etc., if possible (else don’t match).
if tx1['get_asset'] == config.BTC:
if block_index >= 310500 or config.TESTNET: # Protocol change.
fee = int(tx1['fee_required'] * util.price(backward_quantity, tx1['give_quantity'], block_index))
else:
fee = int(tx1['fee_required_remaining'] * util.price(forward_quantity, tx1_get_remaining, block_index))
logger.debug('Tx0 fee provided remaining: {}; required fee: {}'.format(tx0_fee_provided_remaining / config.UNIT, fee / config.UNIT))
if tx0_fee_provided_remaining < fee:
logger.debug('Skipping: tx0 fee provided remaining is too low.')
continue
else:
tx0_fee_provided_remaining -= fee
if block_index >= 287800 or config.TESTNET: # Protocol change.
tx1_fee_required_remaining -= fee
elif tx1['give_asset'] == config.BTC:
if block_index >= 310500 or config.TESTNET: # Protocol change.
fee = int(tx0['fee_required'] * util.price(backward_quantity, tx0['give_quantity'], block_index))
else:
fee = int(tx0['fee_required_remaining'] * util.price(backward_quantity, tx0_get_remaining, block_index))
logger.debug('Tx1 fee provided remaining: {}; required fee: {}'.format(tx1_fee_provided_remaining / config.UNIT, fee / config.UNIT))
if tx1_fee_provided_remaining < fee:
logger.debug('Skipping: tx1 fee provided remaining is too low.')
continue
else:
tx1_fee_provided_remaining -= fee
if block_index >= 287800 or config.TESTNET: # Protocol change.
tx0_fee_required_remaining -= fee
else: # Don’t deduct.
if tx1['get_asset'] == config.BTC:
if tx0_fee_provided_remaining < tx1['fee_required']: continue
elif tx1['give_asset'] == config.BTC:
if tx1_fee_provided_remaining < tx0['fee_required']: continue
if config.BTC in (tx1['give_asset'], tx1['get_asset']):
status = 'pending'
else:
status = 'completed'
# Credit.
util.credit(db, tx['block_index'], tx1['source'], tx1['get_asset'],
forward_quantity, action='order match', event=order_match_id)
util.credit(db, tx['block_index'], tx0['source'], tx0['get_asset'],
backward_quantity, action='order match', event=order_match_id)
# Debit the order, even if it involves giving bitcoins, and so one
# can't debit the sending account.
# Get remainings may be negative.
tx0_give_remaining -= forward_quantity
tx0_get_remaining -= backward_quantity
tx1_give_remaining -= backward_quantity
tx1_get_remaining -= forward_quantity
# Update give_remaining, get_remaining.
# tx0
tx0_status = 'open'
if tx0_give_remaining <= 0 or (tx0_get_remaining <= 0 and (block_index >= 292000 or config.TESTNET)): # Protocol change
if tx0['give_asset'] != config.BTC and tx0['get_asset'] != config.BTC:
# Fill order, and recredit give_remaining.
tx0_status = 'filled'
util.credit(db, block_index, tx0['source'], tx0['give_asset'], tx0_give_remaining, event=tx1['tx_hash'], action='filled')
bindings = {
'give_remaining': tx0_give_remaining,
'get_remaining': tx0_get_remaining,
'fee_required_remaining': tx0_fee_required_remaining,
'fee_provided_remaining': tx0_fee_provided_remaining,
'status': tx0_status,
'tx_hash': tx0['tx_hash']
}
sql='update orders set give_remaining = :give_remaining, get_remaining = :get_remaining, fee_required_remaining = :fee_required_remaining, fee_provided_remaining = :fee_provided_remaining, status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'orders', bindings)
# tx1
if tx1_give_remaining <= 0 or (tx1_get_remaining <= 0 and (block_index >= 292000 or config.TESTNET)): # Protocol change
if tx1['give_asset'] != config.BTC and tx1['get_asset'] != config.BTC:
# Fill order, and recredit give_remaining.
tx1_status = 'filled'
util.credit(db, block_index, tx1['source'], tx1['give_asset'], tx1_give_remaining, event=tx0['tx_hash'], action='filled')
bindings = {
'give_remaining': tx1_give_remaining,
'get_remaining': tx1_get_remaining,
'fee_required_remaining': tx1_fee_required_remaining,
'fee_provided_remaining': tx1_fee_provided_remaining,
'status': tx1_status,
'tx_hash': tx1['tx_hash']
}
sql='update orders set give_remaining = :give_remaining, get_remaining = :get_remaining, fee_required_remaining = :fee_required_remaining, fee_provided_remaining = :fee_provided_remaining, status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'orders', bindings)
# Calculate when the match will expire.
if block_index >= 308000 or config.TESTNET: # Protocol change.
match_expire_index = block_index + 20
elif block_index >= 286500 or config.TESTNET: # Protocol change.
match_expire_index = block_index + 10
else:
match_expire_index = min(tx0['expire_index'], tx1['expire_index'])
# Record order match.
bindings = {
'id': util.make_id(tx0['tx_hash'], tx['tx_hash']),
'tx0_index': tx0['tx_index'],
'tx0_hash': tx0['tx_hash'],
'tx0_address': tx0['source'],
'tx1_index': tx1['tx_index'],
'tx1_hash': tx1['tx_hash'],
'tx1_address': tx1['source'],
'forward_asset': forward_asset,
'forward_quantity': forward_quantity,
'backward_asset': backward_asset,
'backward_quantity': backward_quantity,
'tx0_block_index': tx0['block_index'],
'tx1_block_index': tx1['block_index'],
'block_index': block_index,
'tx0_expiration': tx0['expiration'],
'tx1_expiration': tx1['expiration'],
'match_expire_index': match_expire_index,
'fee_paid': fee,
'status': status,
}
sql='insert into order_matches values(:id, :tx0_index, :tx0_hash, :tx0_address, :tx1_index, :tx1_hash, :tx1_address, :forward_asset, :forward_quantity, :backward_asset, :backward_quantity, :tx0_block_index, :tx1_block_index, :block_index, :tx0_expiration, :tx1_expiration, :match_expire_index, :fee_paid, :status)'
cursor.execute(sql, bindings)
if tx1_status == 'filled':
break
cursor.close()
return
def follow(db, proxy):
cursor = db.cursor()
# Initialise.
initialise(db)
# Get index of last block.
try:
block_index = util.last_block(db)['block_index'] + 1
# Reparse all transactions if minor version has changed.
minor_version = cursor.execute('PRAGMA user_version').fetchall()[0]['user_version']
if minor_version != config.VERSION_MINOR:
logger.info('Client minor version number mismatch ({} ≠ {}).'.format(minor_version, config.VERSION_MINOR))
reparse(db, quiet=False)
logger.info('Resuming parsing.')
except exceptions.DatabaseError:
logger.warning('New database.')
block_index = config.BLOCK_FIRST
# Get index of last transaction.
tx_index = get_next_tx_index(db)
not_supported = {} # No false positives. Use a dict to allow for O(1) lookups
not_supported_sorted = collections.deque()
# ^ Entries in form of (block_index, tx_hash), oldest first. Allows for easy removal of past, unncessary entries
mempool_initialised = False
# a reorg can happen without the block count increasing, or even for that
# matter, with the block count decreasing. This should only delay
# processing of the new blocks a bit.
while True:
starttime = time.time()
# Get block count.
# If the backend is unreachable and `config.FORCE` is set, just sleep
# and try again repeatedly.
try:
block_count = backend.getblockcount(proxy)
except (ConnectionRefusedError, http.client.CannotSendRequest) as e:
if config.FORCE:
time.sleep(config.BACKEND_POLL_INTERVAL)
continue
else:
raise e
# Get new blocks.
if block_index <= block_count:
# Backwards check for incorrect blocks due to chain reorganisation, and stop when a common parent is found.
current_index = block_index
requires_rollback = False
while True:
if current_index == config.BLOCK_FIRST:
break
logger.debug('Checking that block {} is not an orphan.'.format(current_index))
# Backend parent hash.
current_hash_bin = backend.getblockhash(proxy, current_index)
current_cblock = backend.getblock(proxy, current_hash_bin)
backend_parent = bitcoinlib.core.b2lx(current_cblock.hashPrevBlock)
# DB parent hash.
blocks = list(cursor.execute('''SELECT * FROM blocks
WHERE block_index = ?''', (current_index - 1,)))
if len(blocks) != 1: # For empty DB.
break
db_parent = blocks[0]['block_hash']
# Compare.
assert type(db_parent) == str
assert type(backend_parent) == str
if db_parent == backend_parent:
break
else:
current_index -= 1
requires_rollback = True
# Rollback for reorganisation.
if requires_rollback:
# Record reorganisation.
logger.warning('Blockchain reorganisation at block {}.'.format(current_index))
log.message(db, block_index, 'reorg', None, {'block_index': current_index})
# Rollback the DB.
reparse(db, block_index=current_index-1, quiet=True)
block_index = current_index
tx_index = get_next_tx_index(db)
continue
# Get and parse transactions in this block (atomically).
block_hash_bin = backend.getblockhash(proxy, current_index)
block = backend.getblock(proxy, block_hash_bin)
block_hash = bitcoinlib.core.b2lx(block_hash_bin)
previous_block_hash = bitcoinlib.core.b2lx(block.hashPrevBlock)
block_time = block.nTime
txhash_list = backend.get_txhash_list(block)
with db:
# List the block.
cursor.execute('''INSERT INTO blocks(
block_index,
block_hash,
block_time,
previous_block_hash,
difficulty) VALUES(?,?,?,?,?)''',
(block_index,
block_hash,
block_time,
previous_block_hash,
block.difficulty)
)
# List the transactions in the block.
for tx_hash in txhash_list:
# TODO: use rpc._batch to get all transactions with one RPC call
tx_index = list_tx(db, proxy, block_hash, block_index, block_time, tx_hash, tx_index)
# Parse the transactions in the block.
parse_block(db, block_index, block_time)
# When newly caught up, check for conservation of assets.
if block_index == block_count:
check.asset_conservation(db)
# Remove any non‐supported transactions older than ten blocks.
while len(not_supported_sorted) and not_supported_sorted[0][0] <= block_index - 10:
tx_h = not_supported_sorted.popleft()[1]
del not_supported[tx_h]
logger.info('Block: %s (%ss)'%(str(block_index), "{:.2f}".format(time.time() - starttime, 3)))
# Increment block index.
block_count = backend.getblockcount(proxy)
block_index += 1
else:
# First mempool fill for session?
if mempool_initialised:
logger.debug('Updating mempool.')
else:
logger.debug('Initialising mempool.')
# Get old counterpartyd mempool.
old_mempool = list(cursor.execute('''SELECT * FROM mempool'''))
old_mempool_hashes = [message['tx_hash'] for message in old_mempool]
# Fake values for fake block.
curr_time = int(time.time())
mempool_tx_index = tx_index
# For each transaction in Bitcoin Core mempool, if it’s new, create
# a fake block, a fake transaction, capture the generated messages,
# and then save those messages.
# Every transaction in mempool is parsed independently. (DB is rolled back after each one.)
mempool = []
util.MEMPOOL = backend.getrawmempool(proxy)
for tx_hash in util.MEMPOOL:
tx_hash = bitcoinlib.core.b2lx(tx_hash)
# If already in counterpartyd mempool, copy to new one.
if tx_hash in old_mempool_hashes:
for message in old_mempool:
if message['tx_hash'] == tx_hash:
mempool.append((tx_hash, message))
# If already skipped, skip it again.
elif tx_hash not in not_supported:
# Else: list, parse and save it.
try:
with db:
# List the fake block.
cursor.execute('''INSERT INTO blocks(
block_index,
block_hash,
block_time) VALUES(?,?,?)''',
(config.MEMPOOL_BLOCK_INDEX,
config.MEMPOOL_BLOCK_HASH,
curr_time)
)
# List transaction.
try: # Sometimes the transactions can’t be found: `{'code': -5, 'message': 'No information available about transaction'} Is txindex enabled in Bitcoind?`
mempool_tx_index = list_tx(db, proxy, None, block_index, curr_time, tx_hash, mempool_tx_index)
except backend.BitcoindError:
raise MempoolError
# Parse transaction.
cursor.execute('''SELECT * FROM transactions \
WHERE tx_hash = ?''',
(tx_hash,))
transactions = list(cursor)
if transactions:
assert len(transactions) == 1
transaction = transactions[0]
supported = parse_tx(db, transaction)
if not supported:
not_supported[tx_hash] = ''
not_supported_sorted.append((block_index, tx_hash))
else:
# If a transaction hasn’t been added to the
# table `transactions`, then it’s not a
# Counterparty transaction.
not_supported[tx_hash] = ''
not_supported_sorted.append((block_index, tx_hash))
raise MempoolError
# Save transaction and side‐effects in memory.
cursor.execute('''SELECT * FROM messages WHERE block_index = ?''', (config.MEMPOOL_BLOCK_INDEX,))
for message in list(cursor):
mempool.append((tx_hash, message))
# Rollback.
raise MempoolError
except MempoolError:
pass
# Re‐write mempool messages to database.
with db:
cursor.execute('''DELETE FROM mempool''')
for message in mempool:
tx_hash, new_message = message
new_message['tx_hash'] = tx_hash
cursor.execute('''INSERT INTO mempool VALUES(:tx_hash, :command, :category, :bindings, :timestamp)''', (new_message))
# Wait
mempool_initialised = True
db.wal_checkpoint(mode=apsw.SQLITE_CHECKPOINT_PASSIVE)
time.sleep(config.BACKEND_POLL_INTERVAL)
cursor.close()
def follow(db, proxy):
cursor = db.cursor()
# Initialise.
initialise(db)
# Get index of last block.
try:
block_index = util.last_block(db)['block_index'] + 1
# Reparse all transactions if minor version has changed.
minor_version = cursor.execute(
'PRAGMA user_version').fetchall()[0]['user_version']
if minor_version != config.VERSION_MINOR:
logger.info(
'Client minor version number mismatch ({} ≠ {}).'.format(
minor_version, config.VERSION_MINOR))
reparse(db, quiet=False)
logger.info('Resuming parsing.')
except exceptions.DatabaseError:
logger.warning('New database.')
block_index = config.BLOCK_FIRST
# Get index of last transaction.
tx_index = get_next_tx_index(db)
not_supported = {
} # No false positives. Use a dict to allow for O(1) lookups
not_supported_sorted = collections.deque()
# ^ Entries in form of (block_index, tx_hash), oldest first. Allows for easy removal of past, unncessary entries
mempool_initialised = False
# a reorg can happen without the block count increasing, or even for that
# matter, with the block count decreasing. This should only delay
# processing of the new blocks a bit.
while True:
starttime = time.time()
# Get block count.
# If the backend is unreachable and `config.FORCE` is set, just sleep
# and try again repeatedly.
try:
block_count = backend.getblockcount(proxy)
except (ConnectionRefusedError, http.client.CannotSendRequest) as e:
if config.FORCE:
time.sleep(config.BACKEND_POLL_INTERVAL)
continue
else:
raise e
# Get new blocks.
if block_index <= block_count:
# Backwards check for incorrect blocks due to chain reorganisation, and stop when a common parent is found.
current_index = block_index
requires_rollback = False
while True:
if current_index == config.BLOCK_FIRST:
break
logger.debug('Checking that block {} is not an orphan.'.format(
current_index))
# Backend parent hash.
current_hash_bin = backend.getblockhash(proxy, current_index)
current_cblock = backend.getblock(proxy, current_hash_bin)
backend_parent = bitcoinlib.core.b2lx(
current_cblock.hashPrevBlock)
# DB parent hash.
blocks = list(
cursor.execute(
'''SELECT * FROM blocks
WHERE block_index = ?''',
(current_index - 1, )))
if len(blocks) != 1: # For empty DB.
break
db_parent = blocks[0]['block_hash']
# Compare.
assert type(db_parent) == str
assert type(backend_parent) == str
if db_parent == backend_parent:
break
else:
current_index -= 1
requires_rollback = True
# Rollback for reorganisation.
if requires_rollback:
# Record reorganisation.
logger.warning('Blockchain reorganisation at block {}.'.format(
current_index))
log.message(db, block_index, 'reorg', None,
{'block_index': current_index})
# Rollback the DB.
reparse(db, block_index=current_index - 1, quiet=True)
block_index = current_index
tx_index = get_next_tx_index(db)
continue
# Get and parse transactions in this block (atomically).
block_hash_bin = backend.getblockhash(proxy, current_index)
block = backend.getblock(proxy, block_hash_bin)
block_hash = bitcoinlib.core.b2lx(block_hash_bin)
previous_block_hash = bitcoinlib.core.b2lx(block.hashPrevBlock)
block_time = block.nTime
txhash_list = backend.get_txhash_list(block)
with db:
# List the block.
cursor.execute(
'''INSERT INTO blocks(
block_index,
block_hash,
block_time,
previous_block_hash,
difficulty) VALUES(?,?,?,?,?)''',
(block_index, block_hash, block_time, previous_block_hash,
block.difficulty))
# List the transactions in the block.
for tx_hash in txhash_list:
# TODO: use rpc._batch to get all transactions with one RPC call
tx_index = list_tx(db, proxy, block_hash, block_index,
block_time, tx_hash, tx_index)
# Parse the transactions in the block.
parse_block(db, block_index, block_time)
# When newly caught up, check for conservation of assets.
if block_index == block_count:
check.asset_conservation(db)
# Remove any non‐supported transactions older than ten blocks.
while len(not_supported_sorted
) and not_supported_sorted[0][0] <= block_index - 10:
tx_h = not_supported_sorted.popleft()[1]
del not_supported[tx_h]
logger.info('Block: %s (%ss)' % (str(block_index), "{:.2f}".format(
time.time() - starttime, 3)))
# Increment block index.
block_count = backend.getblockcount(proxy)
block_index += 1
else:
# First mempool fill for session?
if mempool_initialised:
logger.debug('Updating mempool.')
else:
logger.debug('Initialising mempool.')
# Get old counterpartyd mempool.
old_mempool = list(cursor.execute('''SELECT * FROM mempool'''))
old_mempool_hashes = [
message['tx_hash'] for message in old_mempool
]
# Fake values for fake block.
curr_time = int(time.time())
mempool_tx_index = tx_index
# For each transaction in Bitcoin Core mempool, if it’s new, create
# a fake block, a fake transaction, capture the generated messages,
# and then save those messages.
# Every transaction in mempool is parsed independently. (DB is rolled back after each one.)
mempool = []
util.MEMPOOL = backend.getrawmempool(proxy)
for tx_hash in util.MEMPOOL:
tx_hash = bitcoinlib.core.b2lx(tx_hash)
# If already in counterpartyd mempool, copy to new one.
if tx_hash in old_mempool_hashes:
for message in old_mempool:
if message['tx_hash'] == tx_hash:
mempool.append((tx_hash, message))
# If already skipped, skip it again.
elif tx_hash not in not_supported:
# Else: list, parse and save it.
try:
with db:
# List the fake block.
cursor.execute(
'''INSERT INTO blocks(
block_index,
block_hash,
block_time) VALUES(?,?,?)''',
(config.MEMPOOL_BLOCK_INDEX,
config.MEMPOOL_BLOCK_HASH, curr_time))
# List transaction.
try: # Sometimes the transactions can’t be found: `{'code': -5, 'message': 'No information available about transaction'} Is txindex enabled in Bitcoind?`
mempool_tx_index = list_tx(
db, proxy, None, block_index, curr_time,
tx_hash, mempool_tx_index)
except backend.BitcoindError:
raise MempoolError
# Parse transaction.
cursor.execute(
'''SELECT * FROM transactions \
WHERE tx_hash = ?''',
(tx_hash, ))
transactions = list(cursor)
if transactions:
assert len(transactions) == 1
transaction = transactions[0]
supported = parse_tx(db, transaction)
if not supported:
not_supported[tx_hash] = ''
not_supported_sorted.append(
(block_index, tx_hash))
else:
# If a transaction hasn’t been added to the
# table `transactions`, then it’s not a
# Counterparty transaction.
not_supported[tx_hash] = ''
not_supported_sorted.append(
(block_index, tx_hash))
raise MempoolError
# Save transaction and side‐effects in memory.
cursor.execute(
'''SELECT * FROM messages WHERE block_index = ?''',
(config.MEMPOOL_BLOCK_INDEX, ))
for message in list(cursor):
mempool.append((tx_hash, message))
# Rollback.
raise MempoolError
except MempoolError:
pass
# Re‐write mempool messages to database.
with db:
cursor.execute('''DELETE FROM mempool''')
for message in mempool:
tx_hash, new_message = message
new_message['tx_hash'] = tx_hash
cursor.execute(
'''INSERT INTO mempool VALUES(:tx_hash, :command, :category, :bindings, :timestamp)''',
(new_message))
# Wait
mempool_initialised = True
db.wal_checkpoint(mode=apsw.SQLITE_CHECKPOINT_PASSIVE)
time.sleep(config.BACKEND_POLL_INTERVAL)
cursor.close()
def match (db, tx):
cursor = db.cursor()
# Get bet in question.
bets = list(cursor.execute('''SELECT * FROM bets\
WHERE (tx_index = ? AND status = ?)''', (tx['tx_index'], 'open')))
if not bets:
cursor.close()
return
else:
assert len(bets) == 1
tx1 = bets[0]
# Get counterbet_type.
if tx1['bet_type'] % 2: counterbet_type = tx1['bet_type'] - 1
else: counterbet_type = tx1['bet_type'] + 1
feed_address = tx1['feed_address']
cursor.execute('''SELECT * FROM bets\
WHERE (feed_address=? AND status=? AND bet_type=?)''',
(tx1['feed_address'], 'open', counterbet_type))
tx1_wager_remaining = tx1['wager_remaining']
tx1_counterwager_remaining = tx1['counterwager_remaining']
bet_matches = cursor.fetchall()
if tx['block_index'] > 284500 or config.TESTNET: # Protocol change.
sorted(bet_matches, key=lambda x: x['tx_index']) # Sort by tx index second.
sorted(bet_matches, key=lambda x: util.price(x['wager_quantity'], x['counterwager_quantity'], tx1['block_index'])) # Sort by price first.
tx1_status = tx1['status']
for tx0 in bet_matches:
if tx1_status != 'open': break
logger.debug('Considering: ' + tx0['tx_hash'])
tx0_wager_remaining = tx0['wager_remaining']
tx0_counterwager_remaining = tx0['counterwager_remaining']
# Bet types must be opposite.
if counterbet_type != tx0['bet_type']:
logger.debug('Skipping: bet types disagree.')
continue
# Leverages must agree exactly
if tx0['leverage'] != tx1['leverage']:
logger.debug('Skipping: leverages disagree.')
continue
# Target values must agree exactly.
if tx0['target_value'] != tx1['target_value']:
logger.debug('Skipping: target values disagree.')
continue
# Fee fractions must agree exactly.
if tx0['fee_fraction_int'] != tx1['fee_fraction_int']:
logger.debug('Skipping: fee fractions disagree.')
continue
# Deadlines must agree exactly.
if tx0['deadline'] != tx1['deadline']:
logger.debug('Skipping: deadlines disagree.')
continue
# If the odds agree, make the trade. The found order sets the odds,
# and they trade as much as they can.
tx0_odds = util.price(tx0['wager_quantity'], tx0['counterwager_quantity'], tx1['block_index'])
tx0_inverse_odds = util.price(tx0['counterwager_quantity'], tx0['wager_quantity'], tx1['block_index'])
tx1_odds = util.price(tx1['wager_quantity'], tx1['counterwager_quantity'], tx1['block_index'])
if tx['block_index'] < 286000: tx0_inverse_odds = util.price(1, tx0_odds, tx1['block_index']) # Protocol change.
logger.debug('Tx0 Inverse Odds: {}; Tx1 Odds: {}'.format(float(tx0_inverse_odds), float(tx1_odds)))
if tx0_inverse_odds > tx1_odds:
logger.debug('Skipping: price mismatch.')
else:
logger.debug('Potential forward quantities: {}, {}'.format(tx0_wager_remaining, int(util.price(tx1_wager_remaining, tx1_odds, tx1['block_index']))))
forward_quantity = int(min(tx0_wager_remaining, int(util.price(tx1_wager_remaining, tx1_odds, tx1['block_index']))))
logger.debug('Forward Quantity: {}'.format(forward_quantity))
backward_quantity = round(forward_quantity / tx0_odds)
logger.debug('Backward Quantity: {}'.format(backward_quantity))
if not forward_quantity:
logger.debug('Skipping: zero forward quantity.')
continue
if tx1['block_index'] >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logger.debug('Skipping: zero backward quantity.')
continue
bet_match_id = util.make_id(tx0['tx_hash'], tx1['tx_hash'])
# Debit the order.
# Counterwager remainings may be negative.
tx0_wager_remaining = tx0_wager_remaining - forward_quantity
tx0_counterwager_remaining = tx0_counterwager_remaining - backward_quantity
tx1_wager_remaining = tx1_wager_remaining - backward_quantity
tx1_counterwager_remaining = tx1_counterwager_remaining - forward_quantity
# tx0
tx0_status = 'open'
if tx0_wager_remaining <= 0 or tx0_counterwager_remaining <= 0:
# Fill order, and recredit give_remaining.
tx0_status = 'filled'
util.credit(db, tx1['block_index'], tx0['source'], config.XCP, tx0_wager_remaining, event=tx1['tx_hash'], action='filled')
bindings = {
'wager_remaining': tx0_wager_remaining,
'counterwager_remaining': tx0_counterwager_remaining,
'status': tx0_status,
'tx_hash': tx0['tx_hash']
}
sql='update bets set wager_remaining = :wager_remaining, counterwager_remaining = :counterwager_remaining, status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, tx1['block_index'], 'update', 'bets', bindings)
if tx1['block_index'] >= 292000 or config.TESTNET: # Protocol change
if tx1_wager_remaining <= 0 or tx1_counterwager_remaining <= 0:
# Fill order, and recredit give_remaining.
tx1_status = 'filled'
util.credit(db, tx1['block_index'], tx1['source'], config.XCP, tx1_wager_remaining, event=tx1['tx_hash'], action='filled')
# tx1
bindings = {
'wager_remaining': tx1_wager_remaining,
'counterwager_remaining': tx1_counterwager_remaining,
'status': tx1_status,
'tx_hash': tx1['tx_hash']
}
sql='update bets set wager_remaining = :wager_remaining, counterwager_remaining = :counterwager_remaining, status = :status where tx_hash = :tx_hash'
cursor.execute(sql, bindings)
log.message(db, tx1['block_index'], 'update', 'bets', bindings)
# Get last value of feed.
broadcasts = list(cursor.execute('''SELECT * FROM broadcasts WHERE (status = ? AND source = ?) ORDER BY tx_index ASC''', ('valid', feed_address)))
initial_value = broadcasts[-1]['value']
# Record bet fulfillment.
bindings = {
'id': util.make_id(tx0['tx_hash'], tx['tx_hash']),
'tx0_index': tx0['tx_index'],
'tx0_hash': tx0['tx_hash'],
'tx0_address': tx0['source'],
'tx1_index': tx1['tx_index'],
'tx1_hash': tx1['tx_hash'],
'tx1_address': tx1['source'],
'tx0_bet_type': tx0['bet_type'],
'tx1_bet_type': tx1['bet_type'],
'feed_address': tx1['feed_address'],
'initial_value': initial_value,
'deadline': tx1['deadline'],
'target_value': tx1['target_value'],
'leverage': tx1['leverage'],
'forward_quantity': forward_quantity,
'backward_quantity': backward_quantity,
'tx0_block_index': tx0['block_index'],
'tx1_block_index': tx1['block_index'],
'block_index': max(tx0['block_index'], tx1['block_index']),
'tx0_expiration': tx0['expiration'],
'tx1_expiration': tx1['expiration'],
'match_expire_index': min(tx0['expire_index'], tx1['expire_index']),
'fee_fraction_int': tx1['fee_fraction_int'],
'status': 'pending',
}
sql='insert into bet_matches values(:id, :tx0_index, :tx0_hash, :tx0_address, :tx1_index, :tx1_hash, :tx1_address, :tx0_bet_type, :tx1_bet_type, :feed_address, :initial_value, :deadline, :target_value, :leverage, :forward_quantity, :backward_quantity, :tx0_block_index, :tx1_block_index, :block_index, :tx0_expiration, :tx1_expiration, :match_expire_index, :fee_fraction_int, :status)'
cursor.execute(sql, bindings)
cursor.close()
return