def validate (db, source, destination, asset, quantity):
try:
util.get_asset_id(db, asset, util.CURRENT_BLOCK_INDEX)
except AssetError:
raise ValidateError('asset invalid')
try:
script.validate(source)
except AddressError:
raise ValidateError('source address invalid')
if destination:
raise ValidateError('destination exists')
if asset == config.SCH:
raise ValidateError('cannot destroy {}'.format(config.SCH))
if type(quantity) != int:
raise ValidateError('quantity not integer')
if quantity > config.MAX_INT:
raise ValidateError('quantity too large')
if quantity < 0:
raise ValidateError('quantity negative')
if util.get_balance(db, source, asset) < quantity:
raise BalanceError('balance insufficient')
if not config.TESTNET:
raise ValidateError('disabled on mainnet')
def validate(db, source, destination, asset, quantity, block_index):
try:
util.get_asset_id(db, asset, block_index)
except AssetError:
raise ValidateError('asset invalid')
try:
script.validate(source)
except AddressError:
raise ValidateError('source address invalid')
try:
script.validate(destination)
except AddressError:
raise ValidateError('destination address invalid')
if asset == config.SCH:
raise ValidateError('cannot send {}'.format(config.SCH))
if type(quantity) != int:
raise ValidateError('quantity not integer')
if quantity > config.MAX_INT:
raise ValidateError('quantity too large')
if quantity <= 0:
raise ValidateError('quantity non‐positive')
if util.get_balance(db, source, asset) < quantity:
raise BalanceError('balance insufficient')
def compose(
db,
source,
feed_address,
bet_type,
deadline,
wager_quantity,
counterwager_quantity,
target_value,
leverage,
expiration,
):
if util.get_balance(db, source, config.SHP) < wager_quantity:
raise exceptions.ComposeError("insufficient funds")
problems, leverage = validate(
db,
source,
feed_address,
bet_type,
deadline,
wager_quantity,
counterwager_quantity,
target_value,
leverage,
expiration,
util.CURRENT_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 get_balance(self, address, asset=config.SHP):
return util.get_balance(self.db, address, asset)
