def compose (db, source, asset, give_quantity, escrow_quantity, mainchainrate, status, open_address=None):
assetid, problems = validate(db, source, asset, give_quantity, escrow_quantity, mainchainrate, status, open_address, util.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
data = message_type.pack(ID)
data += struct.pack(FORMAT, assetid, give_quantity, escrow_quantity, mainchainrate, status)
if status == STATUS_OPEN_EMPTY_ADDRESS and open_address:
data += address.pack(open_address)
return (source, [], data)
def compose(db, source, destination, asset, quantity, memo, memo_is_hex):
cursor = db.cursor()
# Just send BTC?
if asset == config.BTC:
return (source, [(destination, quantity)], None)
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
#quantity must be in int satoshi (not float, string, etc)
if not isinstance(quantity, int):
raise exceptions.ComposeError('quantity must be an int (in satoshi)')
# Only for outgoing (incoming will overburn).
balances = list(
cursor.execute(
'''SELECT * FROM balances WHERE (address = ? AND asset = ?)''',
(source, asset)))
if not balances or balances[0]['quantity'] < quantity:
raise exceptions.ComposeError('insufficient funds')
# convert memo to memo_bytes based on memo_is_hex setting
if memo is None:
memo_bytes = b''
elif memo_is_hex:
memo_bytes = bytes.fromhex(memo)
else:
memo = memo.encode('utf-8')
memo_bytes = struct.pack(">{}s".format(len(memo)), memo)
block_index = util.CURRENT_BLOCK_INDEX
problems = validate(db, source, destination, asset, quantity, memo_bytes,
block_index)
if problems: raise exceptions.ComposeError(problems)
asset_id = util.get_asset_id(db, asset, block_index)
short_address_bytes = address.pack(destination)
data = message_type.pack(ID)
data += struct.pack(FORMAT, asset_id, quantity, short_address_bytes)
data += memo_bytes
cursor.close()
# return an empty array as the second argument because we don't need to send BTC dust to the recipient
return (source, [], data)
def compose (db, source, destination, asset, quantity, memo, memo_is_hex):
cursor = db.cursor()
# Just send BTC?
if asset == config.BTC:
return (source, [(destination, quantity)], None)
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
#quantity must be in int satoshi (not float, string, etc)
if not isinstance(quantity, int):
raise exceptions.ComposeError('quantity must be an int (in satoshi)')
# Only for outgoing (incoming will overburn).
balances = list(cursor.execute('''SELECT * FROM balances WHERE (address = ? AND asset = ?)''', (source, asset)))
if not balances or balances[0]['quantity'] < quantity:
raise exceptions.ComposeError('insufficient funds')
# convert memo to memo_bytes based on memo_is_hex setting
if memo is None:
memo_bytes = b''
elif memo_is_hex:
memo_bytes = bytes.fromhex(memo)
else:
memo = memo.encode('utf-8')
memo_bytes = struct.pack(">{}s".format(len(memo)), memo)
block_index = util.CURRENT_BLOCK_INDEX
problems = validate(db, source, destination, asset, quantity, memo_bytes, block_index)
if problems: raise exceptions.ComposeError(problems)
asset_id = util.get_asset_id(db, asset, block_index)
short_address_bytes = address.pack(destination)
data = message_type.pack(ID)
data += struct.pack(FORMAT, asset_id, quantity, short_address_bytes)
data += memo_bytes
cursor.close()
# return an empty array as the second argument because we don't need to send BTC dust to the recipient
return (source, [], data)
def compose (db, source, destination, flags, memo):
if memo is None:
memo = b''
elif flags & FLAG_BINARY_MEMO:
memo = bytes.fromhex(memo)
else:
memo = memo.encode('utf-8')
memo = struct.pack(">{}s".format(len(memo)), memo)
block_index = util.CURRENT_BLOCK_INDEX
problems = validate(db, source, destination, flags, memo, block_index)
if problems: raise exceptions.ComposeError(problems)
short_address_bytes = address.pack(destination)
data = message_type.pack(ID)
data += struct.pack(FORMAT, short_address_bytes, flags)
data += memo
return (source, [], data)
def _encode_compressLUT(lut):
return b''.join([struct.pack('>H', len(lut['addrs']))] +
[address.pack(addr) for addr in lut['addrs']])