Differential D11658 Diff 34120 test/functional/test_framework/txtools.py

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test/functional/test_framework/txtools.py

Show First 20 Lines • Show All 42 Lines • ▼ Show 20 Lines	while required_padding > 0:
break		break

# The total padding size, for a payload < 0x4c, is:		# The total padding size, for a payload < 0x4c, is:
# vout.value (8 bytes) + script_length (1) + OP_RETURN (1) +		# vout.value (8 bytes) + script_length (1) + OP_RETURN (1) +
# + data length (1) + data		# + data length (1) + data
data_size = required_padding - VOUT_VALUE_SIZE - 3		data_size = required_padding - VOUT_VALUE_SIZE - 3
was_op_pushdata1_used = True		was_op_pushdata1_used = True

script_operations = []
if data_size <= 0x4c:		if data_size <= 0x4c:
was_op_pushdata1_used = False		was_op_pushdata1_used = False
if data_size == 0x4c:		if data_size == 0x4c:
# Adding one more byte to the data causes two more bytes to be		# Adding one more byte to the data causes two more bytes to be
# added to the tx size, because of the need for OP_PUSHDATA1.		# added to the tx size, because of the need for OP_PUSHDATA1.
# So remove 10 bytes to add an empty OP_RETURN vout instead in		# So remove 10 bytes to add an empty OP_RETURN vout instead in
# the next iteration.		# the next iteration.
data_size -= 10		data_size -= 10
elif MAX_OP_RETURN_PAYLOAD < data_size <= MAX_OP_RETURN_PAYLOAD + 10:		elif MAX_OP_RETURN_PAYLOAD < data_size <= MAX_OP_RETURN_PAYLOAD + 10:
# We require more than one VOUT, but the extra space needed is		# We require more than one VOUT, but the extra space needed is
# less than the VOUT footprint. Remove 10 bytes from the current		# less than the VOUT footprint. Remove 10 bytes from the current
# data to avoid overpadding in next iteration.		# data to avoid overpadding in next iteration.
data_size -= 10		data_size -= 10
elif data_size > MAX_OP_RETURN_PAYLOAD + 10:		elif data_size > MAX_OP_RETURN_PAYLOAD + 10:
# Use a full OP_RETURN.		# Use a full OP_RETURN.
data_size = MAX_OP_RETURN_PAYLOAD + 1		data_size = MAX_OP_RETURN_PAYLOAD + 1

if was_op_pushdata1_used:		if was_op_pushdata1_used:
# OP_PUSHDATA1 adds 1 extra byte to the transaction size.		# OP_PUSHDATA1 adds 1 extra byte to the transaction size.
data_size -= 1		data_size -= 1
required_padding -= 1		required_padding -= 1

required_padding -= data_size + VOUT_VALUE_SIZE + 3		required_padding -= data_size + VOUT_VALUE_SIZE + 3

script_operations += [		tx.vout.append(
OP_RETURN,		CTxOut(0, CScript([OP_RETURN, get_random_bytes(data_size)]))
get_random_bytes(data_size)		)
]
tx.vout.append(CTxOut(0, CScript(script_operations)))

tx.rehash()		tx.rehash()


def pad_raw_tx(rawtx_hex, min_size=MIN_TX_SIZE):		def pad_raw_tx(rawtx_hex, min_size=MIN_TX_SIZE):
"""		"""
Pad a raw transaction with OP_RETURN data until it reaches at least min_size		Pad a raw transaction with OP_RETURN data until it reaches at least min_size
"""		"""
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