def send(self, sender, to, value, data=[]):
# print('tuple', sender, to, value, data)
# Encode data.
data = serpent.encode_datalist(data)
data = binascii.unhexlify(data)
# Execute contract.
# print('qux', data, type(data))
util.credit(db,
0,
sender,
config.XCP,
value + 100000000,
action='unit test',
event='facefeed')
success, output = tester.state.do_send(self,
sender,
to,
value,
data=data)
if output:
return rlp.decode_datalist(bytes(output))
else:
return []
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)
util.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)
util.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 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 parse (db, tx, message):
dividend_parse_cursor = db.cursor()
# Unpack message.
try:
if (tx['block_index'] > 288150 or config.TESTNET) and len(message) == LENGTH_2:
quantity_per_unit, asset_id, dividend_asset_id = struct.unpack(FORMAT_2, message)
asset = util.get_asset_name(db, asset_id, tx['block_index'])
dividend_asset = util.get_asset_name(db, dividend_asset_id, tx['block_index'])
status = 'valid'
elif len(message) == LENGTH_1:
quantity_per_unit, asset_id = struct.unpack(FORMAT_1, message)
asset = util.get_asset_name(db, asset_id, tx['block_index'])
dividend_asset = config.XCP
status = 'valid'
else:
raise exceptions.UnpackError
except (exceptions.UnpackError, exceptions.AssetNameError, struct.error) as e:
dividend_asset, quantity_per_unit, asset = None, None, None
status = 'invalid: could not unpack'
if dividend_asset == config.BTC:
status = 'invalid: cannot pay {} dividends within protocol'.format(config.BTC)
if status == 'valid':
# For SQLite3
quantity_per_unit = min(quantity_per_unit, config.MAX_INT)
dividend_total, outputs, problems, fee = validate(db, tx['source'], quantity_per_unit, asset, dividend_asset, block_index=tx['block_index'])
if problems: status = 'invalid: ' + '; '.join(problems)
if status == 'valid':
# Debit.
util.debit(db, tx['block_index'], tx['source'], dividend_asset, dividend_total, action='dividend', event=tx['tx_hash'])
if tx['block_index'] >= 330000 or config.TESTNET: # Protocol change.
util.debit(db, tx['block_index'], tx['source'], config.XCP, fee, action='dividend fee', event=tx['tx_hash'])
# Credit.
for output in outputs:
util.credit(db, tx['block_index'], output['address'], dividend_asset, output['dividend_quantity'], action='dividend', event=tx['tx_hash'])
# 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'],
'asset': asset,
'dividend_asset': dividend_asset,
'quantity_per_unit': quantity_per_unit,
'fee_paid': fee,
'status': status,
}
sql='insert into dividends values(:tx_index, :tx_hash, :block_index, :source, :asset, :dividend_asset, :quantity_per_unit, :fee_paid, :status)'
dividend_parse_cursor.execute(sql, bindings)
dividend_parse_cursor.close()
def parse (db, tx, message):
dividend_parse_cursor = db.cursor()
# Unpack message.
try:
if (tx['block_index'] > 288150 or config.TESTNET) and len(message) == LENGTH_2:
quantity_per_unit, asset_id, dividend_asset_id = struct.unpack(FORMAT_2, message)
asset = util.get_asset_name(asset_id, tx['block_index'])
dividend_asset = util.get_asset_name(dividend_asset_id, tx['block_index'])
status = 'valid'
elif len(message) == LENGTH_1:
quantity_per_unit, asset_id = struct.unpack(FORMAT_1, message)
asset = util.get_asset_name(asset_id, tx['block_index'])
dividend_asset = config.XCP
status = 'valid'
else:
raise exceptions.UnpackError
except (exceptions.UnpackError, exceptions.AssetNameError, struct.error) as e:
dividend_asset, quantity_per_unit, asset = None, None, None
status = 'invalid: could not unpack'
if dividend_asset == config.BTC:
status = 'invalid: cannot pay {} dividends within protocol'.format(config.BTC)
if status == 'valid':
# For SQLite3
quantity_per_unit = min(quantity_per_unit, config.MAX_INT)
dividend_total, outputs, problems, fee = validate(db, tx['source'], quantity_per_unit, asset, dividend_asset, block_index=tx['block_index'])
if problems: status = 'invalid: ' + '; '.join(problems)
if status == 'valid':
# Debit.
util.debit(db, tx['block_index'], tx['source'], dividend_asset, dividend_total, action='dividend', event=tx['tx_hash'])
if tx['block_index'] >= 330000 or config.TESTNET: # Protocol change.
util.debit(db, tx['block_index'], tx['source'], config.XCP, fee, action='dividend fee', event=tx['tx_hash'])
# Credit.
for output in outputs:
util.credit(db, tx['block_index'], output['address'], dividend_asset, output['dividend_quantity'], action='dividend', event=tx['tx_hash'])
# 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'],
'asset': asset,
'dividend_asset': dividend_asset,
'quantity_per_unit': quantity_per_unit,
'fee_paid': fee,
'status': status,
}
sql='insert into dividends values(:tx_index, :tx_hash, :block_index, :source, :asset, :dividend_asset, :quantity_per_unit, :fee_paid, :status)'
dividend_parse_cursor.execute(sql, bindings)
dividend_parse_cursor.close()
def create_contract(self, code, endowment=0, sender=''):
if not sender:
sender = '82a978b3f5962a5b0957d9ee9eef472ee55b42f1' # PyEthereum uses ECDSA to derive this string from `sender = 0`.
util.credit(db, 0, sender, config.XCP, max(endowment*2, 100000000), action='unit test', event='facefeed')
success, data = tester.state.do_send(self, sender, '', endowment, data=code)
contract_id = data
return contract_id
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 parse (db, tx, message=None):
burn_parse_cursor = db.cursor()
status = 'valid'
if status == 'valid':
problems = validate(db, tx['source'], tx['destination'], tx['btc_amount'], tx['block_index'], overburn=False)
if problems: status = 'invalid: ' + '; '.join(problems)
if tx['btc_amount'] != None:
sent = tx['btc_amount']
else:
sent = 0
if status == 'valid':
# Calculate quantity of XCP earned. (Maximum 1 BTC in total, ever.)
cursor = db.cursor()
cursor.execute('''SELECT * FROM burns WHERE (status = ? AND source = ?)''', ('valid', tx['source']))
burns = cursor.fetchall()
already_burned = sum([burn['burned'] for burn in burns])
ONE = 1 * config.UNIT
max_burn = ONE - already_burned
if sent > max_burn: burned = max_burn # Exceeded maximum burn; earn what you can.
else: burned = sent
total_time = config.BURN_END - config.BURN_START
partial_time = config.BURN_END - tx['block_index']
multiplier = (1000 + (500 * Fraction(partial_time, total_time)))
earned = round(burned * multiplier)
# Credit source address with earned XCP.
util.credit(db, tx['block_index'], tx['source'], config.XCP, earned, action='burn', event=tx['tx_hash'])
else:
burned = 0
earned = 0
# Add parsed transaction to message-type–specific table.
# TODO: store sent in table
bindings = {
'tx_index': tx['tx_index'],
'tx_hash': tx['tx_hash'],
'block_index': tx['block_index'],
'source': tx['source'],
'burned': burned,
'earned': earned,
'status': status,
}
sql='insert into burns values(:tx_index, :tx_hash, :block_index, :source, :burned, :earned, :status)'
burn_parse_cursor.execute(sql, bindings)
burn_parse_cursor.close()
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)
util.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)
util.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 send (self, sender, to, value, data=[]):
# print('tuple', sender, to, value, data)
# Encode data.
data = serpent.encode_datalist(data)
data = binascii.unhexlify(data)
# Execute contract.
# print('qux', data, type(data))
util.credit(db, 0, sender, config.XCP, value + 100000000, action='unit test', event='facefeed')
success, output = tester.state.do_send(self, sender, to, value, data=data)
if output:
return rlp.decode_datalist(bytes(output))
else:
return []
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)
util.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)
util.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 parse (db, tx, message):
callback_parse_cursor = db.cursor()
# Unpack message.
try:
if len(message) != LENGTH:
raise exceptions.UnpackError
fraction, asset_id = struct.unpack(FORMAT, message)
asset = util.get_asset_name(db, asset_id, tx['block_index'])
status = 'valid'
except (exceptions.UnpackError, exceptions.AssetNameError, struct.error) as e:
fraction, asset = None, None
status = 'invalid: could not unpack'
if status == 'valid':
call_price, callback_total, outputs, problems = validate(db, tx['source'], fraction, asset, tx['block_time'], tx['block_index'], parse=True)
if problems: status = 'invalid: ' + '; '.join(problems)
if status == 'valid':
# Issuer.
assert call_price * callback_total == int(call_price * callback_total)
util.debit(db, tx['block_index'], tx['source'], config.XCP, int(call_price * callback_total), action='callback', event=tx['tx_hash'])
util.credit(db, tx['block_index'], tx['source'], asset, callback_total, action='callback', event=tx['tx_hash'])
# Holders.
for output in outputs:
assert call_price * output['callback_quantity'] == int(call_price * output['callback_quantity'])
util.debit(db, tx['block_index'], output['address'], asset, output['callback_quantity'], action='callback', event=tx['tx_hash'])
util.credit(db, tx['block_index'], output['address'], config.XCP, int(call_price * output['callback_quantity']), action='callback', event=tx['tx_hash'])
# 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'],
'fraction': fraction,
'asset': asset,
'status': status,
}
sql='insert into callbacks values(:tx_index, :tx_hash, :block_index, :source, :fraction, :asset, :status)'
callback_parse_cursor.execute(sql, bindings)
callback_parse_cursor.close()
def parse (db, tx, message):
callback_parse_cursor = db.cursor()
# Unpack message.
try:
if len(message) != LENGTH:
raise exceptions.UnpackError
fraction, asset_id = struct.unpack(FORMAT, message)
asset = util.get_asset_name(asset_id, tx['block_index'])
status = 'valid'
except (exceptions.UnpackError, exceptions.AssetNameError, struct.error) as e:
fraction, asset = None, None
status = 'invalid: could not unpack'
if status == 'valid':
call_price, callback_total, outputs, problems = validate(db, tx['source'], fraction, asset, tx['block_time'], tx['block_index'], parse=True)
if problems: status = 'invalid: ' + '; '.join(problems)
if status == 'valid':
# Issuer.
assert call_price * callback_total == int(call_price * callback_total)
util.debit(db, tx['block_index'], tx['source'], config.XCP, int(call_price * callback_total), action='callback', event=tx['tx_hash'])
util.credit(db, tx['block_index'], tx['source'], asset, callback_total, action='callback', event=tx['tx_hash'])
# Holders.
for output in outputs:
assert call_price * output['callback_quantity'] == int(call_price * output['callback_quantity'])
util.debit(db, tx['block_index'], output['address'], asset, output['callback_quantity'], action='callback', event=tx['tx_hash'])
util.credit(db, tx['block_index'], output['address'], config.XCP, int(call_price * output['callback_quantity']), action='callback', event=tx['tx_hash'])
# 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'],
'fraction': fraction,
'asset': asset,
'status': status,
}
sql='insert into callbacks values(:tx_index, :tx_hash, :block_index, :source, :fraction, :asset, :status)'
callback_parse_cursor.execute(sql, bindings)
callback_parse_cursor.close()
def create_contract(self, code, endowment=0, sender=''):
if not sender:
sender = '82a978b3f5962a5b0957d9ee9eef472ee55b42f1' # PyEthereum uses ECDSA to derive this string from `sender = 0`.
util.credit(db,
0,
sender,
config.XCP,
max(endowment * 2, 100000000),
action='unit test',
event='facefeed')
success, data = tester.state.do_send(self,
sender,
'',
endowment,
data=code)
contract_id = data
return contract_id
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)
util.message(db, block_index, 'update', 'rps_matches', bindings)
cursor.close()
def transfer_value(self,
tx,
source,
destination,
quantity,
asset=config.XCP):
if source:
util.debit(self.db,
tx.block_index,
source,
asset,
quantity,
action='transfer value',
event=tx.tx_hash)
if destination:
util.credit(self.db,
tx.block_index,
destination,
asset,
quantity,
action='transfer value',
event=tx.tx_hash)
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)
util.message(db, block_index, 'update', 'bet_matches', bindings)
cursor.close()
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)
util.message(db, block_index, 'update', 'rps_matches', 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 = 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': bet_match['tx0_hash'] + bet_match['tx1_hash']
}
sql='update bet_matches set status = :status where id = :bet_match_id'
cursor.execute(sql, bindings)
util.message(db, tx['block_index'], 'update', 'bet_matches', bindings)
broadcast_bet_match_cursor.close()
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
logging.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']:
logging.debug('Skipping: bet types disagree.')
continue
# Leverages must agree exactly
if tx0['leverage'] != tx1['leverage']:
logging.debug('Skipping: leverages disagree.')
continue
# Target values must agree exactly.
if tx0['target_value'] != tx1['target_value']:
logging.debug('Skipping: target values disagree.')
continue
# Fee fractions must agree exactly.
if tx0['fee_fraction_int'] != tx1['fee_fraction_int']:
logging.debug('Skipping: fee fractions disagree.')
continue
# Deadlines must agree exactly.
if tx0['deadline'] != tx1['deadline']:
logging.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.
logging.debug('Tx0 Inverse Odds: {}; Tx1 Odds: {}'.format(
float(tx0_inverse_odds), float(tx1_odds)))
if tx0_inverse_odds > tx1_odds:
logging.debug('Skipping: price mismatch.')
else:
logging.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']))))
logging.debug('Forward Quantity: {}'.format(forward_quantity))
backward_quantity = round(forward_quantity / tx0_odds)
logging.debug('Backward Quantity: {}'.format(backward_quantity))
if not forward_quantity:
logging.debug('Skipping: zero forward quantity.')
continue
if tx1['block_index'] >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logging.debug('Skipping: zero backward quantity.')
continue
bet_match_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)
util.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)
util.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': 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=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 cancel_order_match (db, order_match, status, block_index):
'''
May only be cancelled by callbacks.'''
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)
util.message(db, block_index, 'update', 'order_matches', bindings)
order_match_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)
util.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)
util.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 transfer_value(self, tx, source, destination, quantity, asset=config.XCP):
if source:
util.debit(self.db, tx.block_index, source, asset, quantity, action='transfer value', event=tx.tx_hash)
if destination:
util.credit(self.db, tx.block_index, destination, asset, quantity, action='transfer value', event=tx.tx_hash)
return True
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 = tx0['tx_hash'] + tx1['tx_hash']
if not block_index:
block_index = max(tx0['block_index'], tx1['block_index'])
if tx1_status != 'open': break
logging.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 = ? ''', (tx0['tx_hash'] + tx1['tx_hash'], ))
if list(cursor):
logging.debug('Skipping: previous match')
continue
cursor.execute('''SELECT * FROM order_matches
WHERE id = ? ''', (tx1['tx_hash'] + tx0['tx_hash'], ))
if list(cursor):
logging.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:
logging.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:
logging.debug('Skipping: negative get quantity remaining')
continue
if block_index >= 294000 or config.TESTNET: # Protocol change.
if tx0['fee_required_remaining'] < 0:
logging.debug('Skipping: negative tx0 fee required remaining')
continue
if tx0['fee_provided_remaining'] < 0:
logging.debug('Skipping: negative tx0 fee provided remaining')
continue
if tx1_fee_provided_remaining < 0:
logging.debug('Skipping: negative tx1 fee provided remaining')
continue
if tx1_fee_required_remaining < 0:
logging.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)
logging.debug('Tx0 Price: {}; Tx1 Inverse Price: {}'.format(float(tx0_price), float(tx1_inverse_price)))
if tx0_price > tx1_inverse_price:
logging.debug('Skipping: price mismatch.')
else:
logging.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))))
logging.debug('Forward Quantity: {}'.format(forward_quantity))
backward_quantity = round(forward_quantity * tx0_price)
logging.debug('Backward Quantity: {}'.format(backward_quantity))
if not forward_quantity:
logging.debug('Skipping: zero forward quantity.')
continue
if block_index >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logging.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):
logging.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))
logging.debug('Tx0 fee provided remaining: {}; required fee: {}'.format(tx0_fee_provided_remaining / config.UNIT, fee / config.UNIT))
if tx0_fee_provided_remaining < fee:
logging.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))
logging.debug('Tx1 fee provided remaining: {}; required fee: {}'.format(tx1_fee_provided_remaining / config.UNIT, fee / config.UNIT))
if tx1_fee_provided_remaining < fee:
logging.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)
util.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)
util.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': 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 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):
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
logging.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']:
logging.debug('Skipping: bet types disagree.')
continue
# Leverages must agree exactly
if tx0['leverage'] != tx1['leverage']:
logging.debug('Skipping: leverages disagree.')
continue
# Target values must agree exactly.
if tx0['target_value'] != tx1['target_value']:
logging.debug('Skipping: target values disagree.')
continue
# Fee fractions must agree exactly.
if tx0['fee_fraction_int'] != tx1['fee_fraction_int']:
logging.debug('Skipping: fee fractions disagree.')
continue
# Deadlines must agree exactly.
if tx0['deadline'] != tx1['deadline']:
logging.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.
logging.debug('Tx0 Inverse Odds: {}; Tx1 Odds: {}'.format(float(tx0_inverse_odds), float(tx1_odds)))
if tx0_inverse_odds > tx1_odds:
logging.debug('Skipping: price mismatch.')
else:
logging.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']))))
logging.debug('Forward Quantity: {}'.format(forward_quantity))
backward_quantity = round(forward_quantity / tx0_odds)
logging.debug('Backward Quantity: {}'.format(backward_quantity))
if not forward_quantity:
logging.debug('Skipping: zero forward quantity.')
continue
if tx1['block_index'] >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logging.debug('Skipping: zero backward quantity.')
continue
bet_match_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)
util.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)
util.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': 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 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):
issuance_parse_cursor = db.cursor()
# Unpack message.
try:
if (tx['block_index'] > 283271 or config.TESTNET
) and len(message) >= LENGTH_2: # Protocol change.
if len(message) - LENGTH_2 <= 42:
curr_format = FORMAT_2 + '{}p'.format(len(message) - LENGTH_2)
else:
curr_format = FORMAT_2 + '{}s'.format(len(message) - LENGTH_2)
asset_id, quantity, divisible, callable_, call_date, call_price, description = struct.unpack(
curr_format, message)
call_price = round(call_price, 6) # TODO: arbitrary
try:
description = description.decode('utf-8')
except UnicodeDecodeError:
description = ''
else:
if len(message) != LENGTH_1:
raise exceptions.UnpackError
asset_id, quantity, divisible = struct.unpack(FORMAT_1, message)
callable_, call_date, call_price, description = False, 0, 0.0, ''
try:
asset = util.generate_asset_name(asset_id, tx['block_index'])
except exceptions.AssetNameError:
asset = None
status = 'invalid: bad asset name'
status = 'valid'
except exceptions.UnpackError as e:
asset, quantity, divisible, callable_, call_date, call_price, description = None, None, None, None, None, None, None
status = 'invalid: could not unpack'
fee = 0
if status == 'valid':
call_date, call_price, problems, fee, description, divisible, reissuance = validate(
db,
tx['source'],
tx['destination'],
asset,
quantity,
divisible,
callable_,
call_date,
call_price,
description,
block_index=tx['block_index'])
if problems: status = 'invalid: ' + '; '.join(problems)
if 'total quantity overflow' in problems:
quantity = 0
if tx['destination']:
issuer = tx['destination']
transfer = True
quantity = 0
else:
issuer = tx['source']
transfer = False
# Debit fee.
if status == 'valid':
util.debit(db,
tx['block_index'],
tx['source'],
config.XCP,
fee,
action="issuance fee",
event=tx['tx_hash'])
# Lock?
lock = False
if status == 'valid':
if description and description.lower() == 'lock':
lock = True
cursor = db.cursor()
issuances = list(
cursor.execute(
'''SELECT * FROM issuances \
WHERE (status = ? AND asset = ?)
ORDER BY tx_index ASC''',
('valid', asset)))
cursor.close()
description = issuances[-1][
'description'] # Use last description. (Assume previous issuance exists because tx is valid.)
timestamp, value_int, fee_fraction_int = None, None, None
if not reissuance:
# Add to table of assets.
bindings = {
'asset_id': str(asset_id),
'asset_name': str(asset),
'block_index': tx['block_index'],
}
sql = 'insert into assets values(:asset_id, :asset_name, :block_index)'
issuance_parse_cursor.execute(sql, 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'],
'asset': asset,
'quantity': quantity,
'divisible': divisible,
'source': tx['source'],
'issuer': issuer,
'transfer': transfer,
'callable': callable_,
'call_date': call_date,
'call_price': call_price,
'description': description,
'fee_paid': fee,
'locked': lock,
'status': status,
}
sql = 'insert into issuances values(:tx_index, :tx_hash, :block_index, :asset, :quantity, :divisible, :source, :issuer, :transfer, :callable, :call_date, :call_price, :description, :fee_paid, :locked, :status)'
issuance_parse_cursor.execute(sql, bindings)
# Credit.
if status == 'valid' and quantity:
util.credit(db,
tx['block_index'],
tx['source'],
asset,
quantity,
action="issuance",
event=tx['tx_hash'])
issuance_parse_cursor.close()
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 = 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)
util.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 parse (db, tx, message):
issuance_parse_cursor = db.cursor()
# Unpack message.
try:
if (tx['block_index'] > 283271 or config.TESTNET) and len(message) >= LENGTH_2: # Protocol change.
if len(message) - LENGTH_2 <= 42:
curr_format = FORMAT_2 + '{}p'.format(len(message) - LENGTH_2)
else:
curr_format = FORMAT_2 + '{}s'.format(len(message) - LENGTH_2)
asset_id, quantity, divisible, callable_, call_date, call_price, description = struct.unpack(curr_format, message)
call_price = round(call_price, 6) # TODO: arbitrary
try:
description = description.decode('utf-8')
except UnicodeDecodeError:
description = ''
else:
if len(message) != LENGTH_1:
raise exceptions.UnpackError
asset_id, quantity, divisible = struct.unpack(FORMAT_1, message)
callable_, call_date, call_price, description = False, 0, 0.0, ''
try:
asset = util.generate_asset_name(asset_id, tx['block_index'])
except exceptions.AssetNameError:
asset = None
status = 'invalid: bad asset name'
status = 'valid'
except exceptions.UnpackError as e:
asset, quantity, divisible, callable_, call_date, call_price, description = None, None, None, None, None, None, None
status = 'invalid: could not unpack'
fee = 0
if status == 'valid':
call_date, call_price, problems, fee, description, divisible, reissuance = validate(db, tx['source'], tx['destination'], asset, quantity, divisible, callable_, call_date, call_price, description, block_index=tx['block_index'])
if problems: status = 'invalid: ' + '; '.join(problems)
if 'total quantity overflow' in problems:
quantity = 0
if tx['destination']:
issuer = tx['destination']
transfer = True
quantity = 0
else:
issuer = tx['source']
transfer = False
# Debit fee.
if status == 'valid':
util.debit(db, tx['block_index'], tx['source'], config.XCP, fee, action="issuance fee", event=tx['tx_hash'])
# Lock?
lock = False
if status == 'valid':
if description and description.lower() == 'lock':
lock = True
cursor = db.cursor()
issuances = list(cursor.execute('''SELECT * FROM issuances \
WHERE (status = ? AND asset = ?)
ORDER BY tx_index ASC''', ('valid', asset)))
cursor.close()
description = issuances[-1]['description'] # Use last description. (Assume previous issuance exists because tx is valid.)
timestamp, value_int, fee_fraction_int = None, None, None
if not reissuance:
# Add to table of assets.
bindings= {
'asset_id': str(asset_id),
'asset_name': str(asset),
'block_index': tx['block_index'],
}
sql='insert into assets values(:asset_id, :asset_name, :block_index)'
issuance_parse_cursor.execute(sql, 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'],
'asset': asset,
'quantity': quantity,
'divisible': divisible,
'source': tx['source'],
'issuer': issuer,
'transfer': transfer,
'callable': callable_,
'call_date': call_date,
'call_price': call_price,
'description': description,
'fee_paid': fee,
'locked': lock,
'status': status,
}
sql='insert into issuances values(:tx_index, :tx_hash, :block_index, :asset, :quantity, :divisible, :source, :issuer, :transfer, :callable, :call_date, :call_price, :description, :fee_paid, :locked, :status)'
issuance_parse_cursor.execute(sql, bindings)
# Credit.
if status == 'valid' and quantity:
util.credit(db, tx['block_index'], tx['source'], asset, quantity, action="issuance", event=tx['tx_hash'])
issuance_parse_cursor.close()
def parse(db, tx, MAINNET_BURNS, message=None):
burn_parse_cursor = db.cursor()
if config.TESTNET:
status = 'valid'
if status == 'valid':
problems = validate(db,
tx['source'],
tx['destination'],
tx['btc_amount'],
tx['block_index'],
overburn=False)
if problems: status = 'invalid: ' + '; '.join(problems)
if tx['btc_amount'] != None:
sent = tx['btc_amount']
else:
sent = 0
if status == 'valid':
# Calculate quantity of XCP earned. (Maximum 1 BTC in total, ever.)
cursor = db.cursor()
cursor.execute(
'''SELECT * FROM burns WHERE (status = ? AND source = ?)''',
('valid', tx['source']))
burns = cursor.fetchall()
already_burned = sum([burn['burned'] for burn in burns])
ONE = 1 * config.UNIT
max_burn = ONE - already_burned
if sent > max_burn:
burned = max_burn # Exceeded maximum burn; earn what you can.
else:
burned = sent
total_time = config.BURN_END - config.BURN_START
partial_time = config.BURN_END - tx['block_index']
multiplier = (1000 + (500 * Fraction(partial_time, total_time)))
earned = round(burned * multiplier)
# Credit source address with earned XCP.
util.credit(db,
tx['block_index'],
tx['source'],
config.XCP,
earned,
action='burn',
event=tx['tx_hash'])
else:
burned = 0
earned = 0
tx_index = tx['tx_index']
tx_hash = tx['tx_hash']
block_index = tx['block_index']
source = tx['source']
else:
# Mainnet burns are hard‐coded.
try:
line = MAINNET_BURNS[tx['tx_hash']]
except KeyError:
return
util.credit(db,
int(line['block_index']),
line['source'],
config.XCP,
int(line['earned']),
action='burn',
event=line['tx_hash'])
tx_index = line['tx_index']
tx_hash = line['tx_hash']
block_index = line['block_index']
source = line['source']
burned = line['burned']
earned = line['earned']
status = 'valid'
# Add parsed transaction to message-type–specific table.
# TODO: store sent in table
bindings = {
'tx_index': tx_index,
'tx_hash': tx_hash,
'block_index': block_index,
'source': source,
'burned': burned,
'earned': earned,
'status': status,
}
sql = 'insert into burns values(:tx_index, :tx_hash, :block_index, :source, :burned, :earned, :status)'
burn_parse_cursor.execute(sql, bindings)
burn_parse_cursor.close()
