def compose(db, source, order_match_id):
tx0_hash, tx1_hash = order_match_id[:64], order_match_id[
64:] # UTF-8 encoding means that the indices are doubled.
destination, btc_quantity, escrowed_asset, escrowed_quantity, order_match, problems = validate(
db, source, order_match_id,
util.last_block(db)['block_index'])
if problems: raise exceptions.ComposeError(problems)
# Warn if down to the wire.
time_left = order_match['match_expire_index'] - util.last_block(
db)['block_index']
if time_left < 4:
logging.warning(
'WARNING: Only {} blocks until that order match expires. The payment might not make into the blockchain in time.'
.format(time_left))
if 10 - time_left < 4:
logging.warning(
'WARNING: Order match has only {} confirmation(s).'.format(
10 - time_left))
tx0_hash_bytes, tx1_hash_bytes = binascii.unhexlify(
bytes(tx0_hash, 'utf-8')), binascii.unhexlify(bytes(tx1_hash, 'utf-8'))
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, tx0_hash_bytes, tx1_hash_bytes)
return (source, [(destination, btc_quantity)], data)
def compose (db, source, fraction, asset):
call_price, callback_total, outputs, problems = validate(db, source, fraction, asset, util.last_block(db)['block_time'], util.last_block(db)['block_index'], parse=False)
if problems: raise exceptions.ComposeError(problems)
logging.info('Total quantity to be called back: {} {}'.format(util.devise(db, callback_total, asset, 'output'), asset))
asset_id = util.get_asset_id(db, asset, util.last_block(db)['block_index'])
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, fraction, asset_id)
return (source, [], data)
def compose(db, source, offer_hash):
# Check that offer exists.
offer, offer_type, problems = validate(db, source, offer_hash)
if problems: raise exceptions.ComposeError(problems)
offer_hash_bytes = binascii.unhexlify(bytes(offer_hash, 'utf-8'))
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, offer_hash_bytes)
return (source, [], data)
def compose (db, source, give_asset, give_quantity, get_asset, get_quantity, expiration, fee_required):
cursor = db.cursor()
# Check balance.
if give_asset != config.BTC:
balances = list(cursor.execute('''SELECT * FROM balances WHERE (address = ? AND asset = ?)''', (source, give_asset)))
if (not balances or balances[0]['quantity'] < give_quantity):
raise exceptions.ComposeError('insufficient funds')
problems = validate(db, source, give_asset, give_quantity, get_asset, get_quantity, expiration, fee_required, util.last_block(db)['block_index'])
if problems: raise exceptions.ComposeError(problems)
give_id = util.get_asset_id(db, give_asset, util.last_block(db)['block_index'])
get_id = util.get_asset_id(db, get_asset, util.last_block(db)['block_index'])
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, give_id, give_quantity, get_id, get_quantity,
expiration, fee_required)
cursor.close()
return (source, [], data)
def compose(db, source, possible_moves, wager, move_random_hash, expiration):
problems = validate(db, source, possible_moves, wager, move_random_hash,
expiration,
util.last_block(db)['block_index'])
if problems: raise exceptions.ComposeError(problems)
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, possible_moves, wager,
binascii.unhexlify(move_random_hash), expiration)
return (source, [], data)
def compose (db, source, quantity_per_unit, asset, dividend_asset):
dividend_total, outputs, problems, fee = validate(db, source, quantity_per_unit, asset, dividend_asset, util.last_block(db)['block_index'])
if problems: raise exceptions.ComposeError(problems)
logging.info('Total quantity to be distributed in dividends: {} {}'.format(util.devise(db, dividend_total, dividend_asset, 'output'), dividend_asset))
if dividend_asset == config.BTC:
return (source, [(output['address'], output['dividend_quantity']) for output in outputs], None)
asset_id = util.get_asset_id(db, asset, util.last_block(db)['block_index'])
dividend_asset_id = util.get_asset_id(db, dividend_asset, util.last_block(db)['block_index'])
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT_2, quantity_per_unit, asset_id, dividend_asset_id)
return (source, [], data)
def compose(db, source, quantity, overburn=False):
cursor = db.cursor()
destination = config.UNSPENDABLE
problems = validate(db,
source,
destination,
quantity,
util.last_block(db)['block_index'],
overburn=overburn)
if problems: raise exceptions.ComposeError(problems)
# Check that a maximum of 1 BTC total is burned per address.
burns = list(
cursor.execute(
'''SELECT * FROM burns WHERE (status = ? AND source = ?)''',
('valid', source)))
already_burned = sum([burn['burned'] for burn in burns])
if quantity > (1 * config.UNIT - already_burned) and not overburn:
raise exceptions.ComposeError('1 {} may be burned per address'.format(
config.BTC))
cursor.close()
return (source, [(destination, quantity)], None)
def compose(db, source, feed_address, bet_type, deadline, wager_quantity,
counterwager_quantity, target_value, leverage, expiration):
problems, leverage = validate(db, source, feed_address, bet_type, deadline,
wager_quantity, counterwager_quantity,
target_value, leverage, expiration,
util.last_block(db)['block_index'])
if util.date_passed(deadline):
problems.append('deadline passed')
if problems: raise exceptions.ComposeError(problems)
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, bet_type, deadline, wager_quantity,
counterwager_quantity, target_value, leverage,
expiration)
return (source, [(feed_address, None)], data)
def compose(db, source, timestamp, value, fee_fraction, text):
# Store the fee fraction as an integer.
fee_fraction_int = int(fee_fraction * 1e8)
problems = validate(db, source, timestamp, value, fee_fraction_int, text,
util.last_block(db)['block_index'])
if problems: raise exceptions.ComposeError(problems)
data = struct.pack(config.TXTYPE_FORMAT, ID)
if len(text) <= 52:
curr_format = FORMAT + '{}p'.format(len(text) + 1)
else:
curr_format = FORMAT + '{}s'.format(len(text))
data += struct.pack(curr_format, timestamp, value, fee_fraction_int,
text.encode('utf-8'))
return (source, [], data)
def compose(db, source, move, random, rps_match_id):
tx0_hash, tx1_hash = util.parse_id(rps_match_id)
txn, rps_match, problems = validate(db, source, move, random, rps_match_id)
if problems: raise exceptions.ComposeError(problems)
# Warn if down to the wire.
time_left = rps_match['match_expire_index'] - util.last_block(
db)['block_index']
if time_left < 4:
logger.warning(
'Only {} blocks until that rps match expires. The conclusion might not make into the blockchain in time.'
.format(time_left))
tx0_hash_bytes = binascii.unhexlify(bytes(tx0_hash, 'utf-8'))
tx1_hash_bytes = binascii.unhexlify(bytes(tx1_hash, 'utf-8'))
random_bytes = binascii.unhexlify(bytes(random, 'utf-8'))
data = struct.pack(config.TXTYPE_FORMAT, ID)
data += struct.pack(FORMAT, move, random_bytes, tx0_hash_bytes,
tx1_hash_bytes)
return (source, [], data)
def compose(db, source, transfer_destination, asset, quantity, divisible,
description):
callable_, call_date, call_price = False, 0, 0.0
call_date, call_price, problems, fee, description, divisible, reissuance = validate(
db, source, transfer_destination, asset, quantity, divisible,
callable_, call_date, call_price, description,
util.last_block(db)['block_index'])
if problems: raise exceptions.ComposeError(problems)
asset_id = util.generate_asset_id(asset,
util.last_block(db)['block_index'])
data = struct.pack(config.TXTYPE_FORMAT, ID)
if len(description) <= 42:
curr_format = FORMAT_2 + '{}p'.format(len(description) + 1)
else:
curr_format = FORMAT_2 + '{}s'.format(len(description))
data += struct.pack(curr_format, asset_id, quantity, 1 if divisible else 0,
1 if callable_ else 0, call_date or 0, call_price
or 0.0, description.encode('utf-8'))
if transfer_destination:
destination_outputs = [(transfer_destination, None)]
else:
destination_outputs = []
return (source, destination_outputs, data)
