def compose(db, source, give_asset, give_quantity, get_asset, get_quantity,
expiration, fee_required):
cursor = db.cursor()
# resolve subassets
give_asset = util.resolve_subasset_longname(db, give_asset)
get_asset = util.resolve_subasset_longname(db, get_asset)
# 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.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
give_id = util.get_asset_id(db, give_asset, util.CURRENT_BLOCK_INDEX)
get_id = util.get_asset_id(db, get_asset, util.CURRENT_BLOCK_INDEX)
data = message_type.pack(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, asset_dest_quant_list, memo, memo_is_hex):
cursor = db.cursor()
out_balances = util.accumulate([(t[0], t[2])
for t in asset_dest_quant_list])
for (asset, quantity) in out_balances:
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
if not isinstance(quantity, int):
raise exceptions.ComposeError(
'quantities must be an int (in satoshis) for {}'.format(asset))
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 for {}'.format(asset))
block_index = util.CURRENT_BLOCK_INDEX
problems = validate(db, source, asset_dest_quant_list, block_index)
if problems: raise exceptions.ComposeError(problems)
data = message_type.pack(ID)
data += _encode_mpmaSend(db,
asset_dest_quant_list,
block_index,
memo=memo,
memo_is_hex=memo_is_hex)
return (source, [], data)
def is_vendable(db, asset):
if asset == config.XCP:
return True # Always vendable.
asset = util.resolve_subasset_longname(db, asset)
cursor = db.cursor()
issuances = list(
cursor.execute(
'''SELECT vendable, reassignable, listed FROM issuances
WHERE (status = ? AND asset = ?)
ORDER BY tx_index DESC LIMIT 1''',
('valid', asset)))
if (len(issuances) <= 0):
return False
vendable = issuances[0]['vendable'] # Use the last issuance.
reassignable = issuances[0]['reassignable']
listed = issuances[0]['listed']
if not util.enabled('dispensers'):
return False
elif not util.enabled('enable_vendable_fix') and (reassignable == False
or listed == False):
return False
else:
return vendable
def get_holder_count(asset):
asset = util.resolve_subasset_longname(self.db, asset)
holders = util.holders(self.db, asset, True)
addresses = []
for holder in holders:
addresses.append(holder['address'])
return {asset: len(set(addresses))}
def compose (db, source, quantity_per_unit, asset, dividend_asset):
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
dividend_asset = util.resolve_subasset_longname(db, dividend_asset)
dividend_total, outputs, problems, fee = validate(db, source, quantity_per_unit, asset, dividend_asset, util.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
logger.info('Total quantity to be distributed in dividends: {} {}'.format(util.value_out(db, dividend_total, dividend_asset), 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.CURRENT_BLOCK_INDEX)
dividend_asset_id = util.get_asset_id(db, dividend_asset, util.CURRENT_BLOCK_INDEX)
data = message_type.pack(ID)
data += struct.pack(FORMAT_2, quantity_per_unit, asset_id, dividend_asset_id)
return (source, [], data)
def compose(db, source, asset, quantity, tag):
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
validate(db, source, None, asset, quantity)
data = pack(db, asset, quantity, tag)
return (source, [], data)
def compose (db, source, asset, quantity, tag):
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
validate(db, source, None, asset, quantity)
data = pack(db, asset, quantity, tag)
return (source, [], data)
def get_supply(asset):
if asset == config.BTC:
return backend.get_btc_supply(normalize=False)
elif asset == config.XCP:
return util.xcp_supply(self.db)
else:
asset = util.resolve_subasset_longname(self.db, asset)
return util.asset_supply(self.db, asset)
def compose (db, source, quantity_per_unit, asset, dividend_asset):
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
dividend_asset = util.resolve_subasset_longname(db, dividend_asset)
dividend_total, outputs, problems, fee = validate(db, source, quantity_per_unit, asset, dividend_asset, util.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
logger.info('Total quantity to be distributed in dividends: {} {}'.format(util.value_out(db, dividend_total, dividend_asset), 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.CURRENT_BLOCK_INDEX)
dividend_asset_id = util.get_asset_id(db, dividend_asset, util.CURRENT_BLOCK_INDEX)
data = message_type.pack(ID)
data += struct.pack(FORMAT_2, quantity_per_unit, asset_id, dividend_asset_id)
return (source, [], data)
def get_supply(asset):
if asset == 'BTC':
return backend.get_btc_supply(normalize=False)
elif asset == 'XCP':
return util.xcp_supply(db)
else:
asset = util.resolve_subasset_longname(db, asset)
return util.asset_supply(db, asset)
def validate (db, source, asset_, give_quantity, escrow_quantity, mainchainrate, status, block_index):
problems = []
asset_id = None
if not util.enabled('dispensers'):
problems.append('not activated yet.')
if asset_ == config.BTC:
problems.append('cannot dispense %s' % config.BTC)
return None, problems
# resolve subassets
asset = util.resolve_subasset_longname(db, asset_)
if status == STATUS_OPEN:
if not issuance.is_vendable(db, asset):
problems.append('asset "%s" is not vendable' % asset_)
if give_quantity <= 0: problems.append('give_quantity must be positive')
if mainchainrate <= 0: problems.append('mainchainrate must be positive')
if escrow_quantity < give_quantity:
problems.append('escrow_quantity must be greater or equal than give_quantity')
elif not(status == STATUS_CLOSED):
problems.append('invalid status %i' % status)
cursor = db.cursor()
cursor.execute('''SELECT quantity FROM balances \
WHERE address = ? and asset = ?''', (source,asset,))
available = cursor.fetchall()
if len(available) == 0:
problems.append('address doesn\'t has the asset %s' % asset_)
elif len(available) >= 1 and available[0]['quantity'] < escrow_quantity:
problems.append('address doesn\'t has enough balance of %s (%i < %i)' % (asset_, available[0]['quantity'], escrow_quantity))
else:
cursor.execute('''SELECT * FROM dispensers WHERE source = ? AND asset = ? AND status=?''', (source, asset, STATUS_OPEN))
open_dispensers = cursor.fetchall()
if status == STATUS_OPEN:
if len(open_dispensers) > 0 and open_dispensers[0]['satoshirate'] != mainchainrate:
problems.append('address has a dispenser already opened for asset %s with a different mainchainrate' % asset_)
if len(open_dispensers) > 0 and open_dispensers[0]['give_quantity'] != give_quantity:
problems.append('address has a dispenser already opened for asset %s with a different give_quantity' % asset_)
elif status == STATUS_CLOSED:
if len(open_dispensers) == 0:
problems.append('address doesnt has an open dispenser for asset %s' % asset_)
if len(problems) == 0:
asset_id = util.generate_asset_id(asset, block_index)
if asset_id == 0:
problems.append('cannot dispense %s' % asset_) # How can we test this on a test vector?
if give_quantity > config.MAX_INT or escrow_quantity > config.MAX_INT or mainchainrate > config.MAX_INT:
problems.append('integer overflow')
if len(problems) > 0:
return None, problems
else:
return asset_id, None
def get_asset_info(assets):
logger.warning("Deprecated method: `get_asset_info`")
if not isinstance(assets, list):
raise APIError("assets must be a list of asset names, even if it just contains one entry")
assetsInfo = []
for asset in assets:
asset = util.resolve_subasset_longname(self.db, asset)
# BTC and XCP.
if asset in [config.BTC, config.XCP]:
if asset == config.BTC:
supply = backend.get_btc_supply(normalize=False)
else:
supply = util.xcp_supply(self.db)
assetsInfo.append({
'asset': asset,
'asset_longname': None,
'owner': None,
'divisible': True,
'listed': True,
'reassignable': True,
'vendable': False if asset == config.BTC else True,
'locked': False,
'supply': supply,
'description': '',
'issuer': None
})
continue
# User‐created asset.
cursor = self.db.cursor()
issuances = list(cursor.execute('''SELECT * FROM issuances WHERE (status = ? AND asset = ?) ORDER BY block_index ASC''', ('valid', asset)))
if not issuances:
continue #asset not found, most likely
else:
last_issuance = issuances[-1]
locked = False
for e in issuances:
if e['locked']: locked = True
assetsInfo.append({
'asset': asset,
'asset_longname': last_issuance['asset_longname'],
'owner': last_issuance['issuer'],
'divisible': bool(last_issuance['divisible']),
'listed': bool(last_issuance['listed']),
'reassignable': bool(last_issuance['reassignable']),
'vendable': bool(last_issuance['vendable']),
'locked': locked,
'supply': util.asset_supply(self.db, asset),
'description': last_issuance['description'],
'issuer': last_issuance['issuer']})
return assetsInfo
def compose (db, source, give_asset, give_quantity, get_asset, get_quantity, expiration, fee_required):
cursor = db.cursor()
# resolve subassets
give_asset = util.resolve_subasset_longname(db, give_asset)
get_asset = util.resolve_subasset_longname(db, get_asset)
# 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.CURRENT_BLOCK_INDEX)
if problems: raise exceptions.ComposeError(problems)
give_id = util.get_asset_id(db, give_asset, util.CURRENT_BLOCK_INDEX)
get_id = util.get_asset_id(db, get_asset, util.CURRENT_BLOCK_INDEX)
data = message_type.pack(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, 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, asset, quantity, tag):
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
validate(db, source, None, asset, quantity)
# Validations only required in the compose phase.
try:
bytes.fromhex(tag)
except ValueError:
raise ValidateError('tag is not a hexadecimal format')
if len(tag) > 16:
raise ValidateError('tag is too long')
# Passed validation. Pack them.
data = pack(db, asset, quantity, tag)
return (source, [], data)
def get_holders(asset):
asset = util.resolve_subasset_longname(self.db, asset)
holders = util.holders(self.db, asset, True)
return holders
def get_holders(asset):
asset = util.resolve_subasset_longname(db, asset)
holders = util.holders(db, asset)
return holders
def validate(db, source, asset_dest_quant_list, block_index):
problems = []
if len(asset_dest_quant_list) == 0:
problems.append('send list cannot be empty')
if len(asset_dest_quant_list) == 1:
problems.append('send list cannot have only one element')
if len(asset_dest_quant_list) > 0:
# Need to manually unpack the tuple to avoid errors on scenarios where no memo is specified
grpd = groupby([(t[0], t[1]) for t in asset_dest_quant_list])
lengrps = [len(list(grpr)) for (group, grpr) in grpd]
cardinality = max(lengrps)
if cardinality > 1:
problems.append(
'cannot specify more than once a destination per asset')
cursor = db.cursor()
for t in asset_dest_quant_list:
# Need to manually unpack the tuple to avoid errors on scenarios where no memo is specified
asset = util.resolve_subasset_longname(
db, t[0]) if util.enabled('mpma_validationfix_2323232') else t[0]
destination = t[1]
quantity = t[2]
sendMemo = None
if len(t) > 3:
sendMemo = t[3]
if asset == config.BTC:
problems.append('cannot send {} to {}'.format(
config.BTC, destination))
if not isinstance(quantity, int):
problems.append(
'quantities must be an int (in satoshis) for {} to {}'.format(
asset, destination))
if quantity < 0:
problems.append('negative quantity for {} to {}'.format(
asset, destination))
if quantity == 0:
problems.append('zero quantity for {} to {}'.format(
asset, destination))
# For SQLite3
if quantity > config.MAX_INT:
problems.append('integer overflow for {} to {}'.format(
asset, destination))
# destination is always required
if not destination:
problems.append('destination is required for {}'.format(asset))
if util.enabled('options_require_memo'):
results = cursor.execute(
'SELECT options FROM addresses WHERE address=?',
(destination, ))
if results:
result = results.fetchone()
if result and result[
'options'] & config.ADDRESS_OPTION_REQUIRE_MEMO and (
sendMemo is None):
problems.append(
'destination {} requires memo'.format(destination))
if util.enabled('non_reassignable_assets'
) and asset != config.BTC and asset != config.XCP:
# verify not senging non-reassignable asset
issuances = list(
cursor.execute(
'''SELECT * FROM issuances
WHERE asset = ? AND status = ? ORDER BY tx_index DESC LIMIT 1''',
(asset, 'valid')))
if not issuances:
problems.append('issuance not found (system error?)')
elif not issuances[0]['reassignable'] and issuances[0][
'issuer'] != source and issuances[0][
'issuer'] != destination:
problems.append('{} is a non-reassignable asset'.format(asset))
return problems
def _solve_asset(db, assetName, block_index):
asset = util.resolve_subasset_longname(db, assetName)
return util.get_asset_id(db, asset, block_index)
def validate(db, source, asset, give_quantity, escrow_quantity, mainchainrate,
status, open_address, block_index):
problems = []
order_match = None
asset_id = None
if asset == config.BTC:
problems.append('cannot dispense %s' % config.BTC)
return None, problems
# resolve subassets
asset = util.resolve_subasset_longname(db, asset)
if status == STATUS_OPEN or status == STATUS_OPEN_EMPTY_ADDRESS:
if give_quantity <= 0:
problems.append('give_quantity must be positive')
if mainchainrate <= 0:
problems.append('mainchainrate must be positive')
if escrow_quantity < give_quantity:
problems.append(
'escrow_quantity must be greater or equal than give_quantity')
elif not (status == STATUS_CLOSED):
problems.append('invalid status %i' % status)
cursor = db.cursor()
cursor.execute(
'''SELECT quantity FROM balances \
WHERE address = ? and asset = ?''', (
source,
asset,
))
available = cursor.fetchall()
if len(available) == 0:
problems.append('address doesn\'t has the asset %s' % asset)
elif len(available) >= 1 and available[0]['quantity'] < escrow_quantity:
problems.append('address doesn\'t has enough balance of %s (%i < %i)' %
(asset, available[0]['quantity'], escrow_quantity))
else:
if status == STATUS_OPEN_EMPTY_ADDRESS and not (open_address):
open_address = source
status = STATUS_OPEN
query_address = open_address if status == STATUS_OPEN_EMPTY_ADDRESS else source
cursor.execute(
'''SELECT * FROM dispensers WHERE source = ? AND asset = ? AND status=?''',
(query_address, asset, STATUS_OPEN))
open_dispensers = cursor.fetchall()
if status == STATUS_OPEN or status == STATUS_OPEN_EMPTY_ADDRESS:
if len(open_dispensers) > 0 and open_dispensers[0][
'satoshirate'] != mainchainrate:
problems.append(
'address has a dispenser already opened for asset %s with a different mainchainrate'
% asset)
if len(open_dispensers) > 0 and open_dispensers[0][
'give_quantity'] != give_quantity:
problems.append(
'address has a dispenser already opened for asset %s with a different give_quantity'
% asset)
elif status == STATUS_CLOSED:
if len(open_dispensers) == 0:
problems.append(
'address doesnt has an open dispenser for asset %s' %
asset)
if status == STATUS_OPEN_EMPTY_ADDRESS:
cursor.execute(
'''SELECT count(*) cnt FROM balances WHERE address = ?''',
(query_address, ))
existing_balances = cursor.fetchall()
if existing_balances[0]['cnt'] > 0:
problems.append(
'cannot open on another address if it has any balance history'
)
if len(problems) == 0:
asset_id = util.generate_asset_id(asset, block_index)
if asset_id == 0:
problems.append(
'cannot dispense %s' %
asset) # How can we test this on a test vector?
cursor.close()
if len(problems) > 0:
return None, problems
else:
return asset_id, None