def testBlockchain(
b: int
) -> None:
#Data.
data: Data = Data.fromJSON(vectors["data"])
#pylint: disable=no-member
#MeritRemoval.
removal: SignedMeritRemoval = SignedMeritRemoval.fromSignedJSON(vectors["removals"][b])
#Create and execute a Liver to send the MeritRemoval.
def sendMeritRemoval() -> None:
#Send the Data.
if rpc.meros.liveTransaction(data) != rpc.meros.live.recv():
raise TestError("Meros didn't send back the Data.")
rpc.meros.signedElement(removal)
try:
if len(rpc.meros.live.recv()) != 0:
raise Exception()
except TestError:
raise SuccessError("Meros rejected our MeritRemoval created from the same Element.")
except Exception:
raise TestError("Meros accepted our MeritRemoval created from the same Element.")
Liver(
rpc,
vectors["blockchain"],
callbacks={
1: sendMeritRemoval
}
).live()
def MultipleTest(rpc: RPC) -> None:
file: IO[Any] = open("e2e/Vectors/Consensus/MeritRemoval/Multiple.json",
"r")
vectors: Dict[str, Any] = json.loads(file.read())
file.close()
#MeritRemovals.
removals: List[SignedMeritRemoval] = [
SignedMeritRemoval.fromSignedJSON(vectors["removals"][0]),
SignedMeritRemoval.fromSignedJSON(vectors["removals"][1])
]
#Send and verify the MeritRemoval.
def sendMeritRemovals() -> None:
removalBuf: bytes = rpc.meros.signedElement(removals[0])
if removalBuf != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removals[0].holder, True)
rpc.meros.signedElement(removals[1])
if removalBuf != rpc.meros.live.recv():
raise TestError("Meros didn't send us the first Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removals[0].holder, True)
#Verify the holder has 0 Merit and is marked as malicious.
def verifyFirstMeritRemoval() -> None:
verifyMeritRemoval(rpc, 0, 0, removals[0].holder, True)
#Create and execute a Liver to handle the Signed MeritRemovals.
Liver(rpc,
vectors["blockchain"],
callbacks={
1: sendMeritRemovals,
2: verifyFirstMeritRemoval,
3:
lambda: verifyMeritRemoval(rpc, 0, 0, removals[0].holder, False)
}).live()
#Create and execute a Syncer to handle a Signed MeritRemoval.
Syncer(rpc, vectors["blockchain"]).sync()
verifyMeritRemoval(rpc, 0, 0, removals[0].holder, False)
def SameNonceTest(rpc: RPC) -> None:
file: IO[Any] = open("e2e/Vectors/Consensus/MeritRemoval/SameNonce.json",
"r")
vectors: Dict[str, Any] = json.loads(file.read())
file.close()
#MeritRemoval.
#pylint: disable=no-member
removal: SignedMeritRemoval = SignedMeritRemoval.fromSignedJSON(
vectors["removal"])
#Create and execute a Liver to cause a Signed MeritRemoval.
def sendElements() -> None:
#Send the Elements.
rpc.meros.signedElement(removal.se1)
rpc.meros.signedElement(removal.se2)
#Verify the first Element.
if rpc.meros.live.recv() != (MessageType.SignedDataDifficulty.toByte()
+ removal.se1.signedSerialize()):
raise TestError("Meros didn't send us the first Data Difficulty.")
#Verify the MeritRemoval.
if rpc.meros.live.recv() != (MessageType.SignedMeritRemoval.toByte() +
removal.signedSerialize()):
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removal.holder, True)
Liver(rpc,
vectors["blockchain"],
callbacks={
1: sendElements,
2: lambda: verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
}).live()
#Create and execute a Liver to handle a Signed MeritRemoval.
def sendMeritRemoval() -> None:
#Send and verify the MeritRemoval.
if rpc.meros.signedElement(removal) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removal.holder, True)
Liver(rpc,
vectors["blockchain"],
callbacks={
1: sendMeritRemoval,
2: lambda: verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
}).live()
#Create and execute a Syncer to handle a Signed MeritRemoval.
Syncer(rpc, vectors["blockchain"]).sync()
verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
def InvalidCompetingTest(rpc: RPC) -> None:
file: IO[Any] = open(
"e2e/Vectors/Consensus/MeritRemoval/InvalidCompeting.json", "r")
vectors: Dict[str, Any] = json.loads(file.read())
file.close()
#Transactions.
transactions: Transactions = Transactions.fromJSON(vectors["transactions"])
#MeritRemoval.
#pylint: disable=no-member
removal: SignedMeritRemoval = SignedMeritRemoval.fromSignedJSON(
vectors["removal"])
#Create and execute a Liver to handle the MeritRemoval.
def sendMeritRemoval() -> None:
#Send and verify the MeritRemoval.
removalBytes: bytes = rpc.meros.signedElement(removal)
sent: int = 0
while True:
if sent == 2:
break
msg: bytes = rpc.meros.sync.recv()
if MessageType(msg[0]) == MessageType.TransactionRequest:
rpc.meros.syncTransaction(transactions.txs[msg[1:33]])
sent += 1
else:
raise TestError("Unexpected message sent: " +
msg.hex().upper())
if removalBytes != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removal.holder, True)
#Verify the MeritRemoval and the Blockchain.
def verify() -> None:
verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
verifyBlockchain(rpc, Blockchain.fromJSON(vectors["blockchain"]))
raise SuccessError(
"MeritRemoval and Blockchain were properly handled.")
Liver(rpc,
vectors["blockchain"],
transactions,
callbacks={
1: sendMeritRemoval,
2: verify
}).live()
def MultipleTest(rpc: RPC) -> None:
vectors: Dict[str, Any]
with open("e2e/Vectors/Consensus/MeritRemoval/Multiple.json", "r") as file:
vectors = json.loads(file.read())
removals: List[SignedMeritRemoval] = [
SignedMeritRemoval.fromSignedJSON(vectors["removals"][0]),
SignedMeritRemoval.fromSignedJSON(vectors["removals"][1])
]
#Send and verify the MeritRemovals.
def sendMeritRemovals() -> None:
if rpc.meros.meritRemoval(removals[0]) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removals[0].holder, True)
if rpc.meros.meritRemoval(removals[1]) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the new Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removals[0].holder, True)
#Verify the holder has 0 Merit and isn't marked as malicious.
#Since they had one MeritRemoval archived, they're dead.
#They should have 0 merit, with the other MR being unaddable and therefore dropped.
def verifyFirstMeritRemoval() -> None:
verifyMeritRemoval(rpc, 0, 0, removals[0].holder, False)
Liver(rpc,
vectors["blockchain"],
callbacks={
1: sendMeritRemovals,
2: verifyFirstMeritRemoval
}).live()
#Create and execute a Syncer to handle a Signed MeritRemoval.
Syncer(rpc, vectors["blockchain"]).sync()
verifyMeritRemoval(rpc, 0, 0, removals[0].holder, False)
def HundredThirtyFiveTest(
rpc: RPC
) -> None:
file: IO[Any] = open("e2e/Vectors/Consensus/MeritRemoval/HundredThirtyFive.json", "r")
vectors: Dict[str, Any] = json.loads(file.read())
file.close()
#Datas.
datas: List[Data] = [
Data.fromJSON(vectors["datas"][0]),
Data.fromJSON(vectors["datas"][1]),
Data.fromJSON(vectors["datas"][2])
]
#Transactions.
transactions: Transactions = Transactions()
for data in datas:
transactions.add(data)
#First MeritRemoval.
mr: SignedMeritRemoval = SignedMeritRemoval.fromSignedJSON(vectors["removal"])
def sendMeritRemoval() -> None:
#Send the Datas.
for data in datas:
if rpc.meros.liveTransaction(data) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Data.")
#Send and verify the original MeritRemoval.
if rpc.meros.signedElement(mr) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, mr.holder, True)
Liver(
rpc,
vectors["blockchain"],
transactions,
callbacks={
1: sendMeritRemoval
}
).live()
data: Data = Data(bytes.fromhex("11" * 32), bytes(1))
transactions.add(data)
#Create a competing Data using the same input.
competingData: Data = Data(bytes.fromhex("11" * 32), bytes(2))
transactions.add(competingData)
#Verify the Datas.
verif: SignedVerification = SignedVerification(data.hash)
verif.sign(0, blsPrivKey)
competingVerif: SignedVerification = SignedVerification(competingData.hash)
competingVerif.sign(0, blsPrivKey)
#Create a MeritRemoval out of the conflicting Verifications.
mr: SignedMeritRemoval = SignedMeritRemoval(verif, competingVerif)
#Generate a Block containing the MeritRemoval.
block = Block(
BlockHeader(0, blockchain.last(), BlockHeader.createContents([], [mr]), 1,
bytes(4), BlockHeader.createSketchCheck(bytes(4), []), 0,
blockchain.blocks[-1].header.time + 1200),
BlockBody([], [mr], mr.signature))
#Mine it.
block.mine(blsPrivKey, blockchain.difficulty())
#Add it.
blockchain.add(block)
print("Generated Invalid Competing Block " + str(len(blockchain.blocks)) + ".")
result: Dict[str, Any] = {
#Create the initial Data and two competing Datas.
datas: List[Data] = [Data(bytes(32), edPubKey.to_bytes())]
datas.append(Data(datas[0].hash, b"Initial Data."))
datas.append(Data(datas[0].hash, b"Second Data."))
for data in datas:
data.sign(edPrivKey)
data.beat(spamFilter)
#Create Verifications for all 3.
verifs: List[SignedVerification] = []
for data in datas:
verifs.append(SignedVerification(data.hash, 0))
verifs[-1].sign(0, blsPrivKey)
#Create a MeritRemoval out of the conflicting Verifications.
mr: SignedMeritRemoval = SignedMeritRemoval(verifs[1], verifs[2])
#Create a MeritRemoval with random keys.
packeted: SignedMeritRemoval = SignedMeritRemoval(
SignedMeritRemovalVerificationPacket(
SignedVerificationPacket(verifs[1].hash),
[
blsPubKey.serialize(),
PrivateKey(1).toPublicKey().serialize(),
PrivateKey(2).toPublicKey().serialize()
],
Signature.aggregate([
blsPrivKey.sign(verifs[1].signatureSerialize()),
PrivateKey(1).sign(verifs[1].signatureSerialize()),
PrivateKey(2).sign(verifs[1].signatureSerialize())
])
def testBlockchain(i: int) -> None:
#First MeritRemoval.
mr: SignedMeritRemoval = SignedMeritRemoval.fromSignedJSON(
vectors["removals"][i])
def sendMeritRemoval() -> None:
#Send the Datas.
for data in datas:
if rpc.meros.liveTransaction(data) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Data.")
#Send and verify the MeritRemoval.
if rpc.meros.signedElement(mr) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, mr.holder, True)
def sendRepeatMeritRemoval() -> None:
#Send the Block containing the modified Merit Removal.
block: Block = Block.fromJSON(vectors["blockchains"][i][-1])
rpc.meros.liveBlockHeader(block.header)
#Flag of if the Block's Body synced.
blockBodySynced: bool = False
#Handle sync requests.
reqHash: bytes = bytes()
while True:
if blockBodySynced:
#Sleep for a second so Meros handles the Block.
sleep(1)
#Try receiving from the Live socket, where Meros sends keep-alives.
try:
if len(rpc.meros.live.recv()) != 0:
raise Exception()
except TestError:
#Verify the height is 3.
#The genesis Block, the Block granting Merit, and the Block containing the MeritRemoval originally.
try:
if rpc.call("merit", "getHeight") != 3:
raise Exception()
except Exception:
raise TestError(
"Node added a Block containg a repeat MeritRemoval."
)
#Since the node didn't add the Block, raise SuccessError.
raise SuccessError(
"Node didn't add a Block containing a repeat MeritRemoval."
)
except Exception:
raise TestError("Meros sent a keep-alive.")
msg: bytes = rpc.meros.sync.recv()
if MessageType(msg[0]) == MessageType.BlockBodyRequest:
reqHash = msg[1:33]
if reqHash != block.header.hash:
raise TestError(
"Meros asked for a Block Body that didn't belong to the Block we just sent it."
)
#Send the BlockBody.
blockBodySynced = True
rpc.meros.blockBody(block)
else:
raise TestError("Unexpected message sent: " +
msg.hex().upper())
Liver(rpc,
vectors["blockchains"][i],
transactions,
callbacks={
1: sendMeritRemoval,
2: sendRepeatMeritRemoval
}).live()
datas.append(Data(datas[0].hash, b"Initial Data."))
datas.append(Data(datas[0].hash, b"Second Data."))
for data in datas:
data.sign(edPrivKey)
data.beat(spamFilter)
#Create Verifications for all 3.
verifs: List[SignedVerification] = []
packets: List[VerificationPacket] = []
for data in datas:
verifs.append(SignedVerification(data.hash, 0))
verifs[-1].sign(0, blsPrivKey)
packets.append(VerificationPacket(data.hash, [0]))
#Create a MeritRemoval out of the conflicting Verifications.
mr: SignedMeritRemoval = SignedMeritRemoval(verifs[1], verifs[2])
#Generate a Block containing the MeritRemoval.
proto.add(packets=packets, elements=[mr])
result: Dict[str, Any] = {
"blockchain": proto.toJSON(),
"datas": [datas[0].toJSON(), datas[1].toJSON(), datas[2].toJSON()],
"verification": verifs[0].toSignedJSON(),
"removal": mr.toSignedJSON()
}
vectors: IO[Any] = open(
"e2e/Vectors/Consensus/MeritRemoval/VerifyCompeting.json", "w")
vectors.write(json.dumps(result))
vectors.close()
#Create the initial Data and two competing Datas.
datas: List[Data] = [Data(bytes(32), edPubKey.to_bytes())]
datas.append(Data(datas[0].hash, b"Initial Data."))
datas.append(Data(datas[0].hash, b"Second Data."))
for data in datas:
data.sign(edPrivKey)
data.beat(spamFilter)
#Create Verifications for all 3.
verifs: List[SignedVerification] = []
for data in datas:
verifs.append(SignedVerification(data.hash, 0))
verifs[-1].sign(0, blsPrivKey)
#Create a MeritRemoval out of the conflicting Verifications.
mr: SignedMeritRemoval = SignedMeritRemoval(verifs[1], verifs[2])
#Create a MeritRemoval with random keys.
packeted: SignedMeritRemoval = SignedMeritRemoval(
SignedMeritRemovalVerificationPacket(
SignedVerificationPacket(verifs[1].hash), [
blsPubKey.serialize(),
PrivateKey(blake2b(
b'\1', digest_size=32).digest()).toPublicKey().serialize(),
PrivateKey(blake2b(
b'\2', digest_size=32).digest()).toPublicKey().serialize()
],
Signature.aggregate([
blsPrivKey.sign(verifs[1].signatureSerialize()),
PrivateKey(blake2b(b'\1', digest_size=32).digest()).sign(
verifs[1].signatureSerialize()),
def VerifyCompetingTest(rpc: RPC) -> None:
file: IO[Any] = open(
"e2e/Vectors/Consensus/MeritRemoval/VerifyCompeting.json", "r")
vectors: Dict[str, Any] = json.loads(file.read())
file.close()
#Datas.
datas: List[Data] = [
Data.fromJSON(vectors["datas"][0]),
Data.fromJSON(vectors["datas"][1]),
Data.fromJSON(vectors["datas"][2])
]
#Transactions.
transactions: Transactions = Transactions()
for data in datas:
transactions.add(data)
#Initial Data's Verification.
verif: SignedVerification = SignedVerification.fromSignedJSON(
vectors["verification"])
#MeritRemoval.
#pylint: disable=no-member
removal: SignedMeritRemoval = SignedMeritRemoval.fromSignedJSON(
vectors["removal"])
#Create and execute a Liver to cause a Signed MeritRemoval.
def sendElements() -> None:
#Send the Datas.
for data in datas:
if rpc.meros.liveTransaction(data) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Data.")
#Send the initial Data's verification.
if rpc.meros.signedElement(verif) != rpc.meros.live.recv():
raise TestError("Meros didn't us the initial Data's Verification.")
#Send the first Element.
if rpc.meros.signedElement(removal.se1) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Verification.")
#Trigger the MeritRemoval.
rpc.meros.signedElement(removal.se2)
if rpc.meros.live.recv() != (MessageType.SignedMeritRemoval.toByte() +
removal.signedSerialize()):
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removal.holder, True)
Liver(rpc,
vectors["blockchain"],
transactions,
callbacks={
1: sendElements,
2: lambda: verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
}).live()
#Create and execute a Liver to handle a Signed MeritRemoval.
def sendMeritRemoval() -> None:
#Send the Datas.
for data in datas:
if rpc.meros.liveTransaction(data) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Data.")
#Send the initial Data's verification.
if rpc.meros.signedElement(verif) != rpc.meros.live.recv():
raise TestError("Meros didn't us the initial Data's Verification.")
#Send and verify the MeritRemoval.
if rpc.meros.signedElement(removal) != rpc.meros.live.recv():
raise TestError("Meros didn't send us the Merit Removal.")
verifyMeritRemoval(rpc, 1, 1, removal.holder, True)
Liver(rpc,
vectors["blockchain"],
transactions,
callbacks={
1: sendMeritRemoval,
2: lambda: verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
}).live()
#Create and execute a Syncer to handle a Signed MeritRemoval.
Syncer(rpc, vectors["blockchain"], transactions).sync()
verifyMeritRemoval(rpc, 1, 1, removal.holder, False)
block.mine(blsPrivKey, blockchain.difficulty())
#Add it.
blockchain.add(block)
print("Generated Same Nonce Block " + str(len(blockchain.blocks)) + ".")
#Create a DataDifficulty.
dataDiff: SignedDataDifficulty = SignedDataDifficulty(3, 0)
dataDiff.sign(0, blsPrivKey)
#Create a conflicting DataDifficulty with the same nonce.
dataDiffConflicting = SignedDataDifficulty(1, 0)
dataDiffConflicting.sign(0, blsPrivKey)
#Create a MeritRemoval out of the two of them.
mr: SignedMeritRemoval = SignedMeritRemoval(dataDiff, dataDiffConflicting)
#Generate a Block containing the MeritRemoval.
block = Block(
BlockHeader(0, blockchain.last(), BlockHeader.createContents([], [mr]), 1,
bytes(4), bytes(32), 0,
blockchain.blocks[-1].header.time + 1200),
BlockBody([], [mr], mr.signature))
#Mine it.
block.mine(blsPrivKey, blockchain.difficulty())
#Add it.
blockchain.add(block)
print("Generated Same Nonce Block " + str(len(blockchain.blocks)) + ".")
result: Dict[str, Any] = {
[
PrivateKey(blake2b(b'\1', digest_size=32).digest()).toPublicKey().serialize()
],
PrivateKey(blake2b(b'\1', digest_size=32).digest()).sign(verifs[1].signatureSerialize())
),
SignedMeritRemovalVerificationPacket(
SignedVerificationPacket(verifs[1].hash),
[
PrivateKey(blake2b(b'\1', digest_size=32).digest()).toPublicKey().serialize()
],
PrivateKey(blake2b(b'\1', digest_size=32).digest()).sign(verifs[1].signatureSerialize())
)
]
#Create a MeritRemoval out of the conflicting Verifications.
e1MR: SignedMeritRemoval = SignedMeritRemoval(verifs[1], packets[0], 0)
e2MR: SignedMeritRemoval = SignedMeritRemoval(packets[1], verifs[2], 0)
#Generate a Block containing the MeritRemoval for each chain.
block = Block(
BlockHeader(
0,
e1Chain.last(),
BlockHeader.createContents([], [e1MR]),
1,
bytes(4),
bytes(32),
0,
e1Chain.blocks[-1].header.time + 1200
),
BlockBody([], [e1MR], e1MR.signature)
from e2e.Classes.Consensus.SpamFilter import SpamFilter from e2e.Vectors.Generation.PrototypeChain import PrototypeChain proto: PrototypeChain = PrototypeChain(1, False) blsPrivKey: PrivateKey = PrivateKey(0) blsPubKey: PublicKey = blsPrivKey.toPublicKey() edPrivKey: ed25519.SigningKey = ed25519.SigningKey(b'\0' * 32) edPubKey: ed25519.VerifyingKey = edPrivKey.get_verifying_key() #Create the SendDifficulty MR. sendDiff: SignedSendDifficulty = SignedSendDifficulty(4, 0) sendDiff.sign(0, blsPrivKey) sendDiffMR: SignedMeritRemoval = SignedMeritRemoval(sendDiff, sendDiff) #Create the DataDifficulty MR. dataDiff: SignedDataDifficulty = SignedDataDifficulty(4, 0) dataDiff.sign(0, blsPrivKey) dataDiffMR: SignedMeritRemoval = SignedMeritRemoval(dataDiff, dataDiff) #Create the Verification MR. data: Data = Data(bytes(32), edPubKey.to_bytes()) data.sign(edPrivKey) data.beat(SpamFilter(5)) verif: SignedVerification = SignedVerification(data.hash) verif.sign(0, blsPrivKey) #Transform the Verification to a SignedMeritRemovalVerificationPacket. packet: SignedMeritRemovalVerificationPacket = SignedMeritRemovalVerificationPacket(
from e2e.Classes.Consensus.MeritRemoval import SignedMeritRemoval
from e2e.Vectors.Generation.PrototypeChain import PrototypeChain
blsPrivKey: PrivateKey = PrivateKey(0)
blsPubKey: PublicKey = blsPrivKey.toPublicKey()
proto: PrototypeChain = PrototypeChain(1, False)
#Create conflicting Data Difficulties.
dataDiffs: List[SignedDataDifficulty] = [
SignedDataDifficulty(3, 0),
SignedDataDifficulty(4, 0)
]
dataDiffs[0].sign(0, blsPrivKey)
dataDiffs[1].sign(0, blsPrivKey)
#Create a MeritRemoval out of the conflicting Data Difficulties.
mr: SignedMeritRemoval = SignedMeritRemoval(dataDiffs[0], dataDiffs[1])
proto.add(elements=[mr])
#Create a MeritRemoval with the Elements swapped.
swapped: SignedMeritRemoval = SignedMeritRemoval(dataDiffs[1], dataDiffs[0])
proto.add(elements=[swapped])
result: Dict[str, Any] = {"blockchain": proto.toJSON()}
vectors: IO[Any] = open(
"e2e/Vectors/Consensus/MeritRemoval/HundredTwentyThree/Swap.json", "w")
vectors.write(json.dumps(result))
vectors.close()
bytes(4),
bytes(32),
0,
blockchain.blocks[-1].header.time + 1200
),
BlockBody([], [partial], partial.signature)
)
#Mine it.
block.mine(blsPrivKey, blockchain.difficulty())
#Add it.
blockchain.add(block)
print("Generated Hundred Twenty Three Partial Block " + str(len(blockchain.blocks)) + ".")
#Create a MeritRemoval which isn't partial.
mr: SignedMeritRemoval = SignedMeritRemoval(dataDiffs[0], dataDiffs[1])
#Generate a Block containing the MeritRemoval.
block = Block(
BlockHeader(
0,
blockchain.last(),
BlockHeader.createContents([], [mr]),
1,
bytes(4),
bytes(32),
0,
blockchain.blocks[-1].header.time + 1200
),
BlockBody([], [mr], mr.signature)
)