def compose_tx_spec(self, op_tx_spec):
targets_by_color = group_targets_by_color(op_tx_spec.get_targets(),
self.__class__)
uncolored_targets = targets_by_color.pop(UNCOLORED_MARKER.color_id, [])
# get inputs for each color
colored_inputs = []
colored_targets = []
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
needed_sum = ColorTarget.sum(targets)
inputs, total = op_tx_spec.select_coins(needed_sum)
change = total - needed_sum
if change > 0:
targets.append(
ColorTarget(op_tx_spec.get_change_addr(color_def), change))
colored_inputs += inputs
colored_targets += targets
uncolored_needed = ColorTarget.sum(uncolored_targets)
fee = op_tx_spec.get_required_fee(250 * (len(colored_inputs) + 1))
uncolored_inputs, uncolored_total = op_tx_spec.select_coins(
uncolored_needed + fee)
uncolored_change = uncolored_total - uncolored_needed - fee
if uncolored_change > 0:
uncolored_targets.append(
ColorTarget(op_tx_spec.get_change_addr(UNCOLORED_MARKER),
uncolored_change))
txins = colored_inputs + uncolored_inputs
txouts = [
txspec.ComposedTxSpec.TxOut(target.get_satoshi(),
target.get_address())
for target in (colored_targets + uncolored_targets)
]
return txspec.ComposedTxSpec(txins, txouts)
def compose_tx_spec(self, op_tx_spec):
# group targets by color
targets_by_color = defaultdict(list)
# group targets by color
for target in op_tx_spec.get_targets():
color_def = target.get_colordef()
if color_def == UNCOLORED_MARKER \
or isinstance(color_def, POBColorDefinition):
targets_by_color[color_def.color_id].append(target)
else:
raise InvalidColorError('incompatible color definition')
uncolored_targets = targets_by_color.pop(UNCOLORED_MARKER.color_id, [])
# get inputs for each color
colored_inputs = []
colored_targets = []
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
needed_sum = ColorTarget.sum(targets)
inputs, total = op_tx_spec.select_coins(needed_sum)
change = total - needed_sum
if change > 0:
targets.append(ColorTarget(
op_tx_spec.get_change_addr(color_def), change))
colored_inputs += inputs
colored_targets += targets
# we also need some amount of extra "uncolored" coins
# for padding purposes, possibly
padding_needed = (len(colored_targets) - len(colored_inputs)) \
* self.PADDING
uncolored_needed = ColorTarget.sum(uncolored_targets) \
+ SimpleColorValue(colordef=UNCOLORED_MARKER, value=padding_needed)
fee = op_tx_spec.get_required_fee(250 * (len(colored_inputs) + 1))
amount_needed = uncolored_needed + fee
zero = SimpleColorValue(colordef=UNCOLORED_MARKER, value=0)
if amount_needed == zero:
uncolored_change = zero
uncolored_inputs = []
else:
uncolored_inputs, uncolored_total = op_tx_spec.select_coins(amount_needed)
uncolored_change = uncolored_total - amount_needed
if uncolored_change > zero:
uncolored_targets.append(
ColorTarget(op_tx_spec.get_change_addr(UNCOLORED_MARKER),
uncolored_change))
# compose the TxIn and TxOut elements
txins = colored_inputs + uncolored_inputs
txouts = [
txspec.ComposedTxSpec.TxOut(target.get_satoshi(),
target.get_address())
for target in colored_targets]
txouts += [txspec.ComposedTxSpec.TxOut(target.get_satoshi(),
target.get_address())
for target in uncolored_targets]
return txspec.ComposedTxSpec(txins, txouts)
def compose_genesis_tx_spec(self, op_tx_spec):
targets = op_tx_spec.get_targets()[:]
if len(targets) != 1:
raise InvalidTargetError(
'genesis transaction spec needs exactly one target')
target = targets[0]
if target.get_colordef() != GENESIS_OUTPUT_MARKER:
raise InvalidColorError(
'genesis transaction target should use -1 color_id')
fee = op_tx_spec.get_required_fee(300)
uncolored_value = SimpleColorValue(colordef=UNCOLORED_MARKER,
value=target.get_value())
colorvalue = fee + uncolored_value
inputs, total = op_tx_spec.select_coins(colorvalue)
change = total - fee - uncolored_value
if change > 0:
targets.append(
ColorTarget(op_tx_spec.get_change_addr(UNCOLORED_MARKER),
change))
txouts = [
txspec.ComposedTxSpec.TxOut(target.get_satoshi(),
target.get_address())
for target in targets
]
return txspec.ComposedTxSpec(inputs, txouts)
def compose_tx_spec(self, op_tx_spec):
targets_by_color = group_targets_by_color(op_tx_spec.get_targets(),
self.__class__)
uncolored_targets = targets_by_color.pop(UNCOLORED_MARKER.color_id, [])
composed_tx_spec = op_tx_spec.make_composed_tx_spec()
# get inputs for each color
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
needed_sum = ColorTarget.sum(targets)
inputs, total = op_tx_spec.select_coins(needed_sum)
change = total - needed_sum
if change > 0:
targets.append(
ColorTarget(op_tx_spec.get_change_addr(color_def), change))
composed_tx_spec.add_txins(inputs)
for target in targets:
composed_tx_spec.add_txout(value=target.get_value(),
target=target)
uncolored_needed = ColorTarget.sum(uncolored_targets)
uncolored_inputs, uncolored_total = op_tx_spec.select_coins(
uncolored_needed, composed_tx_spec)
composed_tx_spec.add_txins(uncolored_inputs)
fee = composed_tx_spec.estimate_required_fee()
uncolored_change = uncolored_total - uncolored_needed - fee
if uncolored_change > op_tx_spec.get_dust_threshold():
composed_tx_spec.add_txout(
value=uncolored_change,
target_addr=op_tx_spec.get_change_addr(UNCOLORED_MARKER),
is_fee_change=True)
return composed_tx_spec
def compose_tx_spec(self, op_tx_spec):
targets_by_color = defaultdict(list)
uncolored_targets = []
# group targets by color
for target in op_tx_spec.get_targets():
color_def = target.get_colordef()
if color_def == UNCOLORED_MARKER:
uncolored_targets.append(target)
elif isinstance(color_def, OBColorDefinition):
targets_by_color[color_def.color_id].append(target)
else:
raise InvalidColorError('incompatible color definition')
# get inputs for each color
colored_inputs = []
colored_targets = []
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
needed_sum = ColorTarget.sum(targets)
inputs, total = op_tx_spec.select_coins(needed_sum)
change = total - needed_sum
if change > 0:
targets.append(
ColorTarget(op_tx_spec.get_change_addr(color_def), change))
colored_inputs += inputs
colored_targets += targets
uncolored_needed = ColorTarget.sum(uncolored_targets)
fee = op_tx_spec.get_required_fee(250 * (len(colored_inputs) + 1))
uncolored_inputs, uncolored_total = op_tx_spec.select_coins(uncolored_needed + fee)
uncolored_change = uncolored_total - uncolored_needed - fee
if uncolored_change > 0:
uncolored_targets.append(
ColorTarget(op_tx_spec.get_change_addr(UNCOLORED_MARKER),
uncolored_change))
txins = colored_inputs + uncolored_inputs
txouts = [txspec.ComposedTxSpec.TxOut(target.get_satoshi(),
target.get_address())
for target in (colored_targets + uncolored_targets)]
return txspec.ComposedTxSpec(txins, txouts)
def compose_tx_spec(self, op_tx_spec):
targets_by_color = group_targets_by_color(op_tx_spec.get_targets(),
self.__class__)
uncolored_targets = targets_by_color.pop(UNCOLORED_MARKER.color_id, [])
colored_txins = []
colored_txouts = []
if uncolored_targets:
uncolored_needed = ColorTarget.sum(uncolored_targets)
else:
uncolored_needed = SimpleColorValue(colordef=UNCOLORED_MARKER,
value=0)
dust_threshold = op_tx_spec.get_dust_threshold().get_value()
inputs_by_color = dict()
min_padding = 0
# step 1: get inputs, create change targets, compute min padding
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
needed_sum = ColorTarget.sum(targets)
inputs, total = op_tx_spec.select_coins(needed_sum)
inputs_by_color[color_id] = inputs
change = total - needed_sum
if change > 0:
targets.append(
ColorTarget(op_tx_spec.get_change_addr(color_def), change))
for target in targets:
padding_needed = dust_threshold - target.get_value()
if padding_needed > min_padding:
min_padding = padding_needed
tag = self.Tag(self.Tag.closest_padding_code(min_padding), False)
padding = tag.get_padding()
# step 2: create txins & txouts, compute uncolored requirements
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
for inp in inputs_by_color[color_id]:
colored_txins.append(inp)
uncolored_needed -= SimpleColorValue(colordef=UNCOLORED_MARKER,
value=inp.value)
print uncolored_needed
for target in targets:
svalue = target.get_value() + padding
colored_txouts.append(
txspec.ComposedTxSpec.TxOut(svalue, target.get_address()))
uncolored_needed += SimpleColorValue(colordef=UNCOLORED_MARKER,
value=svalue)
print uncolored_needed
fee = op_tx_spec.get_required_fee(250 * (len(colored_txins) + 1))
uncolored_txouts = []
uncolored_inputs = []
uncolored_change = None
if uncolored_needed + fee > 0:
uncolored_inputs, uncolored_total = op_tx_spec.select_coins(
uncolored_needed + fee)
uncolored_txouts = [
txspec.ComposedTxSpec.TxOut(target.get_satoshi(),
target.get_address())
for target in uncolored_targets
]
uncolored_change = uncolored_total - uncolored_needed - fee
else:
uncolored_change = (-uncolored_needed) - fee
if uncolored_change > 0:
uncolored_txouts.append(
txspec.ComposedTxSpec.TxOut(
uncolored_change.get_value(),
op_tx_spec.get_change_addr(UNCOLORED_MARKER)))
all_inputs = colored_txins + uncolored_inputs
all_inputs[0].set_nSequence(tag.to_nSequence())
return txspec.ComposedTxSpec(all_inputs,
colored_txouts + uncolored_txouts)
def compose_tx_spec(self, op_tx_spec):
targets_by_color = group_targets_by_color(op_tx_spec.get_targets(),
self.__class__)
uncolored_targets = targets_by_color.pop(UNCOLORED_MARKER.color_id, [])
composed_tx_spec = op_tx_spec.make_composed_tx_spec()
if uncolored_targets:
uncolored_needed = ColorTarget.sum(uncolored_targets)
else:
uncolored_needed = SimpleColorValue(colordef=UNCOLORED_MARKER,
value=0)
dust_threshold = op_tx_spec.get_dust_threshold().get_value()
inputs_by_color = dict()
min_padding = 0
# step 1: get inputs, create change targets, compute min padding
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
needed_sum = ColorTarget.sum(targets)
inputs, total = op_tx_spec.select_coins(needed_sum)
inputs_by_color[color_id] = inputs
change = total - needed_sum
if change > 0:
targets.append(
ColorTarget(op_tx_spec.get_change_addr(color_def), change))
for target in targets:
padding_needed = dust_threshold - target.get_value()
if padding_needed > min_padding:
min_padding = padding_needed
tag = self.Tag(self.Tag.closest_padding_code(min_padding), False)
padding = tag.get_padding()
# step 2: create txins & txouts, compute uncolored requirements
for color_id, targets in targets_by_color.items():
color_def = targets[0].get_colordef()
for inp in inputs_by_color[color_id]:
composed_tx_spec.add_txin(inp)
uncolored_needed -= SimpleColorValue(colordef=UNCOLORED_MARKER,
value=inp.value)
for target in targets:
svalue = target.get_value() + padding
composed_tx_spec.add_txout(value=svalue, target=target)
uncolored_needed += SimpleColorValue(colordef=UNCOLORED_MARKER,
value=svalue)
print uncolored_needed
composed_tx_spec.add_txouts(uncolored_targets)
fee = composed_tx_spec.estimate_required_fee()
uncolored_change = None
if uncolored_needed + fee > 0:
uncolored_inputs, uncolored_total = op_tx_spec.select_coins(
uncolored_needed, composed_tx_spec)
composed_tx_spec.add_txins(uncolored_inputs)
fee = composed_tx_spec.estimate_required_fee()
uncolored_change = uncolored_total - uncolored_needed - fee
else:
uncolored_change = (-uncolored_needed) - fee
if uncolored_change > op_tx_spec.get_dust_threshold():
composed_tx_spec.add_txout(
value=uncolored_change,
target_addr=op_tx_spec.get_change_addr(UNCOLORED_MARKER),
is_fee_change=True)
composed_tx_spec.txins[0].set_nSequence(tag.to_nSequence())
return composed_tx_spec