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Merge bitcoin/bitcoin#27832: doc: Clarify -datacarriersize, add -datacarriersize=2 tests

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faafc35a77 doc: Clarify that -datacarriersize applies to the full raw scriptPubKey, not the data push (MarcoFalke)
55550e7fe7 test: Add -datacarriersize=2 tests (MarcoFalke)

Pull request description:

  Clarify with a test that `-datacarriersize` applies to the serialized size of the scriptPubKey, not the size of the pushed data. So for example,

  * `-datacarriersize=2` will reject a `raw(6a01aa)`, even though only one byte is pushed
  * `-datacarriersize=0` (or `-datacarrier=0`) will reject a `raw(6a)`, even though no byte is pushed
  * `-datacarriersize=0` (or `-datacarrier=0`) will reject a `raw(6a00)`, even though zero bytes are pushed

ACKs for top commit:
  ajtowns:
    ACK faafc35a77
  instagibbs:
    ACK faafc35a77

Tree-SHA512: f01ace02798f596ac2a02461e9f2a6ef91b3b37c976ea0b3bc860e2d3efb0ace0fd8b779dd18249cee7f84ebbe5fd21d8506afd3a15edadc00b843ff3b4aacc7
This commit is contained in:
fanquake
2023-08-03 17:33:20 +01:00
parent 61849f0464 faafc35a77
commit da3816e4e8
2 changed files with 31 additions and 5 deletions
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30
test/functional/mempool_datacarrier.py
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@@ -22,16 +22,18 @@ from test_framework.wallet import MiniWallet
class DataCarrierTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 3
self.num_nodes = 4
self.extra_args = [
[],
["-datacarrier=0"],
["-datacarrier=1", f"-datacarriersize={MAX_OP_RETURN_RELAY - 1}"]
["-datacarrier=1", f"-datacarriersize={MAX_OP_RETURN_RELAY - 1}"],
["-datacarrier=1", f"-datacarriersize=2"],
]
def test_null_data_transaction(self, node: TestNode, data: bytes, success: bool) -> None:
def test_null_data_transaction(self, node: TestNode, data, success: bool) -> None:
tx = self.wallet.create_self_transfer(fee_rate=0)["tx"]
tx.vout.append(CTxOut(nValue=0, scriptPubKey=CScript([OP_RETURN, data])))
data = [] if data is None else [data]
tx.vout.append(CTxOut(nValue=0, scriptPubKey=CScript([OP_RETURN] + data)))
tx.vout[0].nValue -= tx.get_vsize() # simply pay 1sat/vbyte fee
tx_hex = tx.serialize().hex()
@@ -49,6 +51,8 @@ class DataCarrierTest(BitcoinTestFramework):
default_size_data = random_bytes(MAX_OP_RETURN_RELAY - 3)
too_long_data = random_bytes(MAX_OP_RETURN_RELAY - 2)
small_data = random_bytes(MAX_OP_RETURN_RELAY - 4)
one_byte = random_bytes(1)
zero_bytes = random_bytes(0)
self.log.info("Testing null data transaction with default -datacarrier and -datacarriersize values.")
self.test_null_data_transaction(node=self.nodes[0], data=default_size_data, success=True)
@@ -65,6 +69,24 @@ class DataCarrierTest(BitcoinTestFramework):
self.log.info("Testing a null data transaction with a size smaller than accepted by -datacarriersize.")
self.test_null_data_transaction(node=self.nodes[2], data=small_data, success=True)
self.log.info("Testing a null data transaction with no data.")
self.test_null_data_transaction(node=self.nodes[0], data=None, success=True)
self.test_null_data_transaction(node=self.nodes[1], data=None, success=False)
self.test_null_data_transaction(node=self.nodes[2], data=None, success=True)
self.test_null_data_transaction(node=self.nodes[3], data=None, success=True)
self.log.info("Testing a null data transaction with zero bytes of data.")
self.test_null_data_transaction(node=self.nodes[0], data=zero_bytes, success=True)
self.test_null_data_transaction(node=self.nodes[1], data=zero_bytes, success=False)
self.test_null_data_transaction(node=self.nodes[2], data=zero_bytes, success=True)
self.test_null_data_transaction(node=self.nodes[3], data=zero_bytes, success=True)
self.log.info("Testing a null data transaction with one byte of data.")
self.test_null_data_transaction(node=self.nodes[0], data=one_byte, success=True)
self.test_null_data_transaction(node=self.nodes[1], data=one_byte, success=False)
self.test_null_data_transaction(node=self.nodes[2], data=one_byte, success=True)
self.test_null_data_transaction(node=self.nodes[3], data=one_byte, success=False)
if __name__ == '__main__':
DataCarrierTest().main()