refactor(verification): move verification methods

hathor/builder/builder.py

@@ -41,7 +41,7 @@
     TransactionStorage,
 )
 from hathor.util import Random, Reactor, get_environment_info
-from hathor.verification.verification_service import VerificationService
+from hathor.verification.verification_service import VerificationService, VertexVerifiers
 from hathor.wallet import BaseWallet, Wallet
 
 logger = get_logger()
@@ -102,6 +102,7 @@ def __init__(self) -> None:
         self._feature_service: Optional[FeatureService] = None
         self._bit_signaling_service: Optional[BitSignalingService] = None
 
+        self._vertex_verifiers: Optional[VertexVerifiers] = None
         self._verification_service: Optional[VerificationService] = None
 
         self._rocksdb_path: Optional[str] = None
@@ -432,10 +433,18 @@ def _get_or_create_bit_signaling_service(self, tx_storage: TransactionStorage) -
 
     def _get_or_create_verification_service(self) -> VerificationService:
         if self._verification_service is None:
-            self._verification_service = VerificationService()
+            verifiers = self._get_or_create_vertex_verifiers()
+            self._verification_service = VerificationService(verifiers=verifiers)
 
         return self._verification_service
 
+    def _get_or_create_vertex_verifiers(self) -> VertexVerifiers:
+        if self._vertex_verifiers is None:
+            settings = self._get_or_create_settings()
+            self._vertex_verifiers = VertexVerifiers.create(settings=settings)
+
+        return self._vertex_verifiers
+
     def use_memory(self) -> 'Builder':
         self.check_if_can_modify()
         self._storage_type = StorageType.MEMORY
@@ -533,6 +542,11 @@ def set_verification_service(self, verification_service: VerificationService) ->
         self._verification_service = verification_service
         return self
 
+    def set_vertex_verifiers(self, vertex_verifiers: VertexVerifiers) -> 'Builder':
+        self.check_if_can_modify()
+        self._vertex_verifiers = vertex_verifiers
+        return self
+
     def set_reactor(self, reactor: Reactor) -> 'Builder':
         self.check_if_can_modify()
         self._reactor = reactor

hathor/builder/cli_builder.py

@@ -35,7 +35,7 @@
 from hathor.pubsub import PubSubManager
 from hathor.stratum import StratumFactory
 from hathor.util import Random, Reactor
-from hathor.verification.verification_service import VerificationService
+from hathor.verification.verification_service import VerificationService, VertexVerifiers
 from hathor.wallet import BaseWallet, HDWallet, Wallet
 
 logger = get_logger()
@@ -202,7 +202,8 @@ def create_manager(self, reactor: Reactor) -> HathorManager:
             not_support_features=self._args.signal_not_support
         )
 
-        verification_service = VerificationService()
+        vertex_verifiers = VertexVerifiers.create(settings=settings)
+        verification_service = VerificationService(verifiers=vertex_verifiers)
 
         p2p_manager = ConnectionsManager(
             reactor,

hathor/cli/mining.py

@@ -24,6 +24,9 @@
 
 import requests
 
+from hathor.conf.get_settings import get_settings
+from hathor.verification.block_verifier import BlockVerifier
+
 _SLEEP_ON_ERROR_SECONDS = 5
 _MAX_CONN_RETRIES = math.inf
 
@@ -134,7 +137,9 @@ def execute(args: Namespace) -> None:
                                                                       block.nonce, block.weight))
 
         try:
-            block.verify_without_storage()
+            settings = get_settings()
+            verifier = BlockVerifier(settings=settings)
+            verifier.verify_without_storage(block)
         except HathorError:
             print('[{}] ERROR: Block has not been pushed because it is not valid.'.format(datetime.datetime.now()))
         else:

hathor/simulator/simulator.py

@@ -28,7 +28,14 @@
 from hathor.simulator.clock import HeapClock, MemoryReactorHeapClock
 from hathor.simulator.miner.geometric_miner import GeometricMiner
 from hathor.simulator.tx_generator import RandomTransactionGenerator
+from hathor.simulator.verification import (
+    SimulatorBlockVerifier,
+    SimulatorMergeMinedBlockVerifier,
+    SimulatorTokenCreationTransactionVerifier,
+    SimulatorTransactionVerifier,
+)
 from hathor.util import Random
+from hathor.verification.verification_service import VertexVerifiers
 from hathor.wallet import HDWallet
 
 if TYPE_CHECKING:
@@ -52,25 +59,17 @@ def _apply_patches(cls):
 
         Patches:
 
-        - disable pow verification
         - disable Transaction.resolve method
         - set DAA test-mode to DISABLED (will actually run the pow function, that won't actually verify the pow)
         - override AVG_TIME_BETWEEN_BLOCKS to 64
         """
         from hathor.transaction import BaseTransaction
 
-        def verify_pow(self: BaseTransaction, *args: Any, **kwargs: Any) -> None:
-            assert self.hash is not None
-            logger.new().debug('Skipping BaseTransaction.verify_pow() for simulator')
-
         def resolve(self: BaseTransaction, update_time: bool = True) -> bool:
             self.update_hash()
             logger.new().debug('Skipping BaseTransaction.resolve() for simulator')
             return True
 
-        cls._original_verify_pow = BaseTransaction.verify_pow
-        BaseTransaction.verify_pow = verify_pow
-
         cls._original_resolve = BaseTransaction.resolve
         BaseTransaction.resolve = resolve
 
@@ -85,7 +84,6 @@ def _remove_patches(cls):
         """ Remove the patches previously applied.
         """
         from hathor.transaction import BaseTransaction
-        BaseTransaction.verify_pow = cls._original_verify_pow
         BaseTransaction.resolve = cls._original_resolve
 
         from hathor import daa
@@ -170,10 +168,18 @@ def create_artifacts(self, builder: Optional[Builder] = None) -> BuildArtifacts:
         wallet = HDWallet(gap_limit=2)
         wallet._manually_initialize()
 
+        vertex_verifiers = VertexVerifiers(
+            block=SimulatorBlockVerifier(settings=self.settings),
+            merge_mined_block=SimulatorMergeMinedBlockVerifier(settings=self.settings),
+            tx=SimulatorTransactionVerifier(settings=self.settings),
+            token_creation_tx=SimulatorTokenCreationTransactionVerifier(settings=self.settings),
+        )
+
         artifacts = builder \
             .set_reactor(self._clock) \
             .set_rng(Random(self.rng.getrandbits(64))) \
             .set_wallet(wallet) \
+            .set_vertex_verifiers(vertex_verifiers) \
             .build()
 
         artifacts.manager.start()

hathor/simulator/verification.py

@@ -0,0 +1,54 @@
+#  Copyright 2023 Hathor Labs
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+from typing import Optional
+
+from structlog import get_logger
+
+from hathor.transaction import BaseTransaction
+from hathor.verification.block_verifier import BlockVerifier
+from hathor.verification.merge_mined_block_verifier import MergeMinedBlockVerifier
+from hathor.verification.token_creation_transaction_verifier import TokenCreationTransactionVerifier
+from hathor.verification.transaction_verifier import TransactionVerifier
+
+logger = get_logger()
+
+
+def verify_pow(vertex: BaseTransaction) -> None:
+    assert vertex.hash is not None
+    logger.new().debug('Skipping BaseTransaction.verify_pow() for simulator')
+
+
+class SimulatorBlockVerifier(BlockVerifier):
+    @classmethod
+    def verify_pow(cls, vertex: BaseTransaction, *, override_weight: Optional[float] = None) -> None:
+        verify_pow(vertex)
+
+
+class SimulatorMergeMinedBlockVerifier(MergeMinedBlockVerifier):
+    @classmethod
+    def verify_pow(cls, vertex: BaseTransaction, *, override_weight: Optional[float] = None) -> None:
+        verify_pow(vertex)
+
+
+class SimulatorTransactionVerifier(TransactionVerifier):
+    @classmethod
+    def verify_pow(cls, vertex: BaseTransaction, *, override_weight: Optional[float] = None) -> None:
+        verify_pow(vertex)
+
+
+class SimulatorTokenCreationTransactionVerifier(TokenCreationTransactionVerifier):
+    @classmethod
+    def verify_pow(cls, vertex: BaseTransaction, *, override_weight: Optional[float] = None) -> None:
+        verify_pow(vertex)

hathor/stratum/stratum.py

@@ -41,6 +41,7 @@
 from hathor.transaction import BaseTransaction, BitcoinAuxPow, Block, MergeMinedBlock, Transaction, sum_weights
 from hathor.transaction.exceptions import PowError, ScriptError, TxValidationError
 from hathor.util import Reactor, json_dumpb, json_loadb, reactor
+from hathor.verification.vertex_verifier import VertexVerifier
 from hathor.wallet.exceptions import InvalidAddress
 
 if TYPE_CHECKING:
@@ -526,7 +527,7 @@ def handle_submit(self, params: dict, msgid: Optional[str]) -> None:
         self.log.debug('share received', block=tx, block_base=block_base.hex(), block_base_hash=block_base_hash.hex())
 
         try:
-            tx.verify_pow(job.weight)
+            VertexVerifier.verify_pow(tx, override_weight=job.weight)
         except PowError:
             self.log.error('bad share, discard', job_weight=job.weight, tx=tx)
             return self.send_error(INVALID_SOLUTION, msgid, {
@@ -542,7 +543,7 @@ def handle_submit(self, params: dict, msgid: Optional[str]) -> None:
         self.manager.reactor.callLater(0, self.job_request)
 
         try:
-            tx.verify_pow()
+            VertexVerifier.verify_pow(tx)
         except PowError:
             # Transaction pow was not enough, but the share was succesfully submited
             self.log.info('high hash, keep mining', tx=tx)