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.SCH: # Can’t credit SCH.
util.credit(
db,
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_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,
bet_match["tx0_address"],
config.SHP,
bet_match["forward_quantity"],
action="recredit forward quantity",
event=bet_match["id"],
)
# Recredit tx1 address.
util.credit(
db,
bet_match["tx1_address"],
config.SHP,
bet_match["backward_quantity"],
action="recredit backward quantity",
event=bet_match["id"],
)
# Update status of bet match.
bindings = {"status": status, "bet_match_id": bet_match["id"]}
sql = "update bet_matches set status = :status where id = :bet_match_id"
cursor.execute(sql, bindings)
log.message(db, block_index, "update", "bet_matches", bindings)
cursor.close()
def 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, sender, config.SHP, 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, shell_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':
# SCH must be paid all at once.
if tx['shell_amount'] >= shell_quantity:
# Credit source address for the currency that he bought with the SatoshiChains.
util.credit(db, tx['source'], escrowed_asset, escrowed_quantity, action='shellpay', 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'],
'shell_amount': tx['shell_amount'],
'order_match_id': order_match_id,
'status': status,
}
sql='insert into shellpays values(:tx_index, :tx_hash, :block_index, :source, :destination, :shell_amount, :order_match_id, :status)'
cursor.execute(sql, bindings)
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)
log.message(db, block_index, "update", "bets", bindings)
util.credit(
db, bet["source"], config.SHP, bet["wager_remaining"], action="recredit wager remaining", event=bet["tx_hash"]
)
cursor = db.cursor()
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, sender, config.SHP, 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_rps (db, rps, status, block_index):
cursor = db.cursor()
# Update status of rps.
bindings = {
'status': status,
'tx_hash': rps['tx_hash']
}
sql='''UPDATE rps SET status = :status WHERE tx_hash = :tx_hash'''
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'rps', bindings)
util.credit(db, rps['source'], 'SHP', rps['wager'], action='recredit wager', event=rps['tx_hash'])
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, rps_match['tx0_address'], 'SHP',
rps_match['wager'], action='recredit wager', event=rps_match['id'])
# Recredit tx1 address.
util.credit(db, rps_match['tx1_address'], 'SHP',
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, winner, 'SHP',
2 * rps_match['wager'], action='wins', event=rps_match['id'])
# Update status of rps match.
bindings = {
'status': status,
'rps_match_id': rps_match['id']
}
sql='UPDATE rps_matches SET status = :status WHERE id = :rps_match_id'
cursor.execute(sql, bindings)
log.message(db, block_index, 'update', 'rps_matches', bindings)
cursor.close()
def 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"])
) # Sort by price first.
tx1_status = tx1["status"]
for tx0 in bet_matches:
if tx1_status != "open":
break
logger.debug("Considering: " + tx0["tx_hash"])
tx0_wager_remaining = tx0["wager_remaining"]
tx0_counterwager_remaining = tx0["counterwager_remaining"]
# Bet types must be opposite.
if counterbet_type != tx0["bet_type"]:
logger.debug("Skipping: bet types disagree.")
continue
# Leverages must agree exactly
if tx0["leverage"] != tx1["leverage"]:
logger.debug("Skipping: leverages disagree.")
continue
# Target values must agree exactly.
if tx0["target_value"] != tx1["target_value"]:
logger.debug("Skipping: target values disagree.")
continue
# Fee fractions must agree exactly.
if tx0["fee_fraction_int"] != tx1["fee_fraction_int"]:
logger.debug("Skipping: fee fractions disagree.")
continue
# Deadlines must agree exactly.
if tx0["deadline"] != tx1["deadline"]:
logger.debug("Skipping: deadlines disagree.")
continue
# If the odds agree, make the trade. The found order sets the odds,
# and they trade as much as they can.
tx0_odds = util.price(tx0["wager_quantity"], tx0["counterwager_quantity"])
tx0_inverse_odds = util.price(tx0["counterwager_quantity"], tx0["wager_quantity"])
tx1_odds = util.price(tx1["wager_quantity"], tx1["counterwager_quantity"])
if tx["block_index"] < 286000:
tx0_inverse_odds = util.price(1, tx0_odds) # Protocol change.
logger.debug("Tx0 Inverse Odds: {}; Tx1 Odds: {}".format(float(tx0_inverse_odds), float(tx1_odds)))
if tx0_inverse_odds > tx1_odds:
logger.debug("Skipping: price mismatch.")
else:
logger.debug(
"Potential forward quantities: {}, {}".format(
tx0_wager_remaining, int(util.price(tx1_wager_remaining, tx1_odds))
)
)
forward_quantity = int(min(tx0_wager_remaining, int(util.price(tx1_wager_remaining, tx1_odds))))
logger.debug("Forward Quantity: {}".format(forward_quantity))
backward_quantity = round(forward_quantity / tx0_odds)
logger.debug("Backward Quantity: {}".format(backward_quantity))
if not forward_quantity:
logger.debug("Skipping: zero forward quantity.")
continue
if tx1["block_index"] >= 286500 or config.TESTNET: # Protocol change.
if not backward_quantity:
logger.debug("Skipping: zero backward quantity.")
continue
bet_match_id = util.make_id(tx0["tx_hash"], tx1["tx_hash"])
# Debit the order.
# Counterwager remainings may be negative.
tx0_wager_remaining = tx0_wager_remaining - forward_quantity
tx0_counterwager_remaining = tx0_counterwager_remaining - backward_quantity
tx1_wager_remaining = tx1_wager_remaining - backward_quantity
tx1_counterwager_remaining = tx1_counterwager_remaining - forward_quantity
# tx0
tx0_status = "open"
if tx0_wager_remaining <= 0 or tx0_counterwager_remaining <= 0:
# Fill order, and recredit give_remaining.
tx0_status = "filled"
util.credit(db, tx0["source"], config.SHP, tx0_wager_remaining, event=tx1["tx_hash"], action="filled")
bindings = {
"wager_remaining": tx0_wager_remaining,
"counterwager_remaining": tx0_counterwager_remaining,
"status": tx0_status,
"tx_hash": tx0["tx_hash"],
}
sql = "update bets set wager_remaining = :wager_remaining, counterwager_remaining = :counterwager_remaining, status = :status where tx_hash = :tx_hash"
cursor.execute(sql, bindings)
log.message(db, tx["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["source"], config.SHP, tx1_wager_remaining, event=tx1["tx_hash"], action="filled"
)
# tx1
bindings = {
"wager_remaining": tx1_wager_remaining,
"counterwager_remaining": tx1_counterwager_remaining,
"status": tx1_status,
"tx_hash": tx1["tx_hash"],
}
sql = "update bets set wager_remaining = :wager_remaining, counterwager_remaining = :counterwager_remaining, status = :status where tx_hash = :tx_hash"
cursor.execute(sql, bindings)
log.message(db, tx["block_index"], "update", "bets", bindings)
# Get last value of feed.
broadcasts = list(
cursor.execute(
"""SELECT * FROM broadcasts WHERE (status = ? AND source = ?) ORDER BY tx_index ASC""",
("valid", feed_address),
)
)
initial_value = broadcasts[-1]["value"]
# Record bet fulfillment.
bindings = {
"id": util.make_id(tx0["tx_hash"], tx["tx_hash"]),
"tx0_index": tx0["tx_index"],
"tx0_hash": tx0["tx_hash"],
"tx0_address": tx0["source"],
"tx1_index": tx1["tx_index"],
"tx1_hash": tx1["tx_hash"],
"tx1_address": tx1["source"],
"tx0_bet_type": tx0["bet_type"],
"tx1_bet_type": tx1["bet_type"],
"feed_address": tx1["feed_address"],
"initial_value": initial_value,
"deadline": tx1["deadline"],
"target_value": tx1["target_value"],
"leverage": tx1["leverage"],
"forward_quantity": forward_quantity,
"backward_quantity": backward_quantity,
"tx0_block_index": tx0["block_index"],
"tx1_block_index": tx1["block_index"],
"block_index": max(tx0["block_index"], tx1["block_index"]),
"tx0_expiration": tx0["expiration"],
"tx1_expiration": tx1["expiration"],
"match_expire_index": min(tx0["expire_index"], tx1["expire_index"]),
"fee_fraction_int": tx1["fee_fraction_int"],
"status": "pending",
}
sql = "insert into bet_matches values(:id, :tx0_index, :tx0_hash, :tx0_address, :tx1_index, :tx1_hash, :tx1_address, :tx0_bet_type, :tx1_bet_type, :feed_address, :initial_value, :deadline, :target_value, :leverage, :forward_quantity, :backward_quantity, :tx0_block_index, :tx1_block_index, :block_index, :tx0_expiration, :tx1_expiration, :match_expire_index, :fee_fraction_int, :status)"
cursor.execute(sql, bindings)
cursor.close()
return
def 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['source'], config.SHP, 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['source'], asset, quantity, action="issuance", event=tx['tx_hash'])
issuance_parse_cursor.close()
def match(db, tx, block_index=None):
cursor = db.cursor()
# Get order in question.
orders = list(
cursor.execute(
"""SELECT * FROM orders\
WHERE (tx_index = ? AND status = ?)""",
(tx["tx_index"], "open"),
)
)
if not orders:
cursor.close()
return
else:
assert len(orders) == 1
tx1 = orders[0]
cursor.execute(
"""SELECT * FROM orders \
WHERE (give_asset=? AND get_asset=? AND status=? AND tx_hash != ?)""",
(tx1["get_asset"], tx1["give_asset"], "open", tx1["tx_hash"]),
)
tx1_give_remaining = tx1["give_remaining"]
tx1_get_remaining = tx1["get_remaining"]
order_matches = cursor.fetchall()
if tx["block_index"] > 284500 or config.TESTNET: # Protocol change.
order_matches = sorted(order_matches, key=lambda x: x["tx_index"]) # Sort by tx index second.
order_matches = sorted(
order_matches, key=lambda x: util.price(x["get_quantity"], x["give_quantity"])
) # 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 SCH, and so cannot be ‘filled’).
if tx0["give_asset"] == config.SCH or tx0["get_asset"] == config.SCH: # 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"])
tx1_price = util.price(tx1["get_quantity"], tx1["give_quantity"])
tx1_inverse_price = util.price(tx1["give_quantity"], tx1["get_quantity"])
# Protocol change.
if tx["block_index"] < 286000:
tx1_inverse_price = util.price(1, tx1_price)
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))
)
)
forward_quantity = int(min(tx0_give_remaining, int(util.price(tx1_give_remaining, tx0_price))))
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_shell_quantity = 0.001 * config.UNIT # 0.001 SCH
if (forward_asset == config.SCH and forward_quantity <= min_shell_quantity) or (
backward_asset == config.SCH and backward_quantity <= min_shell_quantity
):
logger.debug("Skipping: below minimum {} quantity".format(config.SCH))
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.SCH:
if block_index >= 310500 or config.TESTNET: # Protocol change.
fee = int(tx1["fee_required"] * util.price(backward_quantity, tx1["give_quantity"]))
else:
fee = int(tx1["fee_required_remaining"] * util.price(forward_quantity, tx1_get_remaining))
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.SCH:
if block_index >= 310500 or config.TESTNET: # Protocol change.
fee = int(tx0["fee_required"] * util.price(backward_quantity, tx0["give_quantity"]))
else:
fee = int(tx0["fee_required_remaining"] * util.price(backward_quantity, tx0_get_remaining))
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.SCH:
if tx0_fee_provided_remaining < tx1["fee_required"]:
continue
elif tx1["give_asset"] == config.SCH:
if tx1_fee_provided_remaining < tx0["fee_required"]:
continue
if config.SCH in (tx1["give_asset"], tx1["get_asset"]):
status = "pending"
else:
status = "completed"
# Credit.
util.credit(
db, tx1["source"], tx1["get_asset"], forward_quantity, action="order match", event=order_match_id
)
util.credit(
db, tx0["source"], tx0["get_asset"], backward_quantity, action="order match", event=order_match_id
)
# Debit the order, even if it involves giving SatoshiChains, 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.SCH and tx0["get_asset"] != config.SCH:
# Fill order, and recredit give_remaining.
tx0_status = "filled"
util.credit(
db, 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.SCH and tx1["get_asset"] != config.SCH:
# Fill order, and recredit give_remaining.
tx1_status = "filled"
util.credit(
db, 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):
"""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.SCH:
util.credit(
db,
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.SCH 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.SCH:
util.credit(
db,
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.SCH 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.SCH:
exact_penalty(db, order_match["tx0_address"], block_index, order_match["id"])
if tx1_order["status"] == "expired" and order_match["backward_asset"] == config.SCH:
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, 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['shell_amount'], tx['block_index'], overburn=False)
if problems: status = 'invalid: ' + '; '.join(problems)
if tx['shell_amount'] != None:
sent = tx['shell_amount']
else:
sent = 0
if status == 'valid':
# Calculate quantity of SHP earned. (Maximum 1 SCH 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 SHP.
util.credit(db, tx['source'], config.SHP, 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, line['source'], config.SHP, int(line['earned']), action='burn', event=line['tx_hash'])
tx_index = tx['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()
def transfer_value(self, tx, source, destination, quantity, asset=config.SHP):
if source:
util.debit(self.db, source, asset, quantity, action='transfer value', event=tx.tx_hash)
if destination:
util.credit(self.db, destination, asset, quantity, action='transfer value', event=tx.tx_hash)
return True