Create MiscHelpersEip4844

ethereum/spec/src/main/java/tech/pegasys/teku/spec/logic/versions/eip4844/SpecLogicEip4844.java

@@ -31,19 +31,19 @@
 import tech.pegasys.teku.spec.logic.versions.altair.util.AttestationUtilAltair;
 import tech.pegasys.teku.spec.logic.versions.bellatrix.helpers.BeaconStateMutatorsBellatrix;
 import tech.pegasys.teku.spec.logic.versions.bellatrix.helpers.BellatrixTransitionHelpers;
-import tech.pegasys.teku.spec.logic.versions.bellatrix.helpers.MiscHelpersBellatrix;
 import tech.pegasys.teku.spec.logic.versions.bellatrix.statetransition.epoch.EpochProcessorBellatrix;
 import tech.pegasys.teku.spec.logic.versions.bellatrix.util.BlindBlockUtilBellatrix;
 import tech.pegasys.teku.spec.logic.versions.capella.block.BlockProcessorCapella;
 import tech.pegasys.teku.spec.logic.versions.eip4844.forktransition.Eip4844StateUpgrade;
+import tech.pegasys.teku.spec.logic.versions.eip4844.helpers.MiscHelpersEip4844;
 import tech.pegasys.teku.spec.schemas.SchemaDefinitionsEip4844;
 
 public class SpecLogicEip4844 extends AbstractSpecLogic {
   private final Optional<SyncCommitteeUtil> syncCommitteeUtil;
 
   private SpecLogicEip4844(
       final Predicates predicates,
-      final MiscHelpersBellatrix miscHelpers,
+      final MiscHelpersEip4844 miscHelpers,
       final BeaconStateAccessorsAltair beaconStateAccessors,
       final BeaconStateMutatorsBellatrix beaconStateMutators,
       final OperationSignatureVerifier operationSignatureVerifier,
@@ -83,7 +83,7 @@ public static SpecLogicEip4844 create(
       final SpecConfigEip4844 config, final SchemaDefinitionsEip4844 schemaDefinitions) {
     // Helpers
     final Predicates predicates = new Predicates(config);
-    final MiscHelpersBellatrix miscHelpers = new MiscHelpersBellatrix(config);
+    final MiscHelpersEip4844 miscHelpers = new MiscHelpersEip4844(config);
     final BeaconStateAccessorsAltair beaconStateAccessors =
         new BeaconStateAccessorsAltair(config, predicates, miscHelpers);
     final BeaconStateMutatorsBellatrix beaconStateMutators =

ethereum/spec/src/main/java/tech/pegasys/teku/spec/logic/versions/eip4844/helpers/MiscHelpersEip4844.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright ConsenSys Software Inc., 2022
+ *
+ * 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.
+ */
+
+package tech.pegasys.teku.spec.logic.versions.eip4844.helpers;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static tech.pegasys.teku.spec.config.SpecConfigEip4844.BLOB_TX_TYPE;
+import static tech.pegasys.teku.spec.config.SpecConfigEip4844.VERSIONED_HASH_VERSION_KZG;
+
+import com.google.common.annotations.VisibleForTesting;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.apache.tuweni.bytes.Bytes;
+import org.apache.tuweni.bytes.Bytes32;
+import org.apache.tuweni.units.bigints.UInt32;
+import tech.pegasys.teku.infrastructure.crypto.Hash;
+import tech.pegasys.teku.infrastructure.unsigned.UInt64;
+import tech.pegasys.teku.kzg.KZGCommitment;
+import tech.pegasys.teku.spec.config.SpecConfig;
+import tech.pegasys.teku.spec.datastructures.execution.Transaction;
+import tech.pegasys.teku.spec.datastructures.execution.versions.eip4844.BlobsSidecar;
+import tech.pegasys.teku.spec.logic.versions.bellatrix.helpers.MiscHelpersBellatrix;
+import tech.pegasys.teku.spec.logic.versions.eip4844.types.VersionedHash;
+import tech.pegasys.teku.spec.logic.versions.eip4844.util.KZGUtilEip4844;
+
+public class MiscHelpersEip4844 extends MiscHelpersBellatrix {
+
+  public MiscHelpersEip4844(final SpecConfig specConfig) {
+    super(specConfig);
+  }
+
+  public void validateBlobSidecar(
+      final UInt64 slot,
+      final Bytes32 beaconBlockRoot,
+      final List<KZGCommitment> kzgCommitments,
+      final BlobsSidecar blobsSidecar) {
+    checkArgument(
+        slot.equals(blobsSidecar.getBeaconBlockSlot()),
+        "Block slot should match blobsSidecar slot");
+    checkArgument(
+        beaconBlockRoot.equals(blobsSidecar.getBeaconBlockRoot()),
+        "Block root should match blobsSidecar beacon block root");
+    checkArgument(
+        kzgCommitments.size() == blobsSidecar.getBlobs().size(),
+        "Number of kzgCommitments should match number of blobs");
+    KZGUtilEip4844.verifyAggregateKZGProof(
+        blobsSidecar.getBlobs(), kzgCommitments, blobsSidecar.getKZGAggregatedProof());
+  }
+
+  public boolean isDataAvailable(
+      final UInt64 slot,
+      final Bytes32 beaconBlockRoot,
+      final List<KZGCommitment> kzgCommitments,
+      final BlobsSidecar blobsSidecar) {
+    validateBlobSidecar(slot, beaconBlockRoot, kzgCommitments, blobsSidecar);
+    return true;
+  }
+
+  @VisibleForTesting
+  public VersionedHash kzgCommitmentToVersionedHash(final KZGCommitment kzgCommitment) {
+    return VersionedHash.create(
+        VERSIONED_HASH_VERSION_KZG, Hash.sha256(kzgCommitment.getBytesCompressed()));
+  }
+
+  @VisibleForTesting
+  public List<VersionedHash> txPeekBlobVersionedHashes(final Transaction transaction) {
+    checkArgument(isBlobTransaction(transaction), "Transaction should be of BLOB type");
+    final Bytes txData = transaction.getBytes();
+    // 1st byte is transaction type, next goes ssz encoded SignedBlobTransaction
+    // Getting variable length BlobTransaction offset, which is the message of signed tx
+    final int messageOffset =
+        UInt32.fromBytes(txData.slice(1, 4), ByteOrder.LITTLE_ENDIAN).add(1).intValue();
+    // Getting blobVersionedHashes field offset in BlobTransaction
+    // field offset: 32 + 8 + 32 + 32 + 8 + 4 + 32 + 4 + 4 + 32 = 188
+    final int blobVersionedHashesOffset =
+        messageOffset
+            + UInt32.fromBytes(txData.slice(messageOffset + 188, 4), ByteOrder.LITTLE_ENDIAN)
+                .intValue();
+    final List<VersionedHash> versionedHashes = new ArrayList<>();
+    for (int hashStartOffset = blobVersionedHashesOffset;
+        hashStartOffset < txData.size();
+        hashStartOffset += VersionedHash.SIZE) {
+      versionedHashes.add(
+          new VersionedHash(Bytes32.wrap(txData.slice(hashStartOffset, VersionedHash.SIZE))));
+    }
+
+    return versionedHashes;
+  }
+
+  private boolean isBlobTransaction(final Transaction transaction) {
+    return transaction.getBytes().get(0) == BLOB_TX_TYPE.get(0);
+  }
+
+  public boolean verifyKZGCommitmentsAgainstTransactions(
+      final List<Transaction> transactions, final List<KZGCommitment> kzgCommitments) {
+    final List<VersionedHash> transactionsVersionedHashes =
+        transactions.stream()
+            .filter(this::isBlobTransaction)
+            .map(this::txPeekBlobVersionedHashes)
+            .flatMap(List::stream)
+            .collect(Collectors.toList());
+    final List<VersionedHash> commitmentsVersionedHashes =
+        kzgCommitments.stream()
+            .map(this::kzgCommitmentToVersionedHash)
+            .collect(Collectors.toList());
+    return transactionsVersionedHashes.equals(commitmentsVersionedHashes);
+  }
+}

ethereum/spec/src/main/java/tech/pegasys/teku/spec/logic/versions/eip4844/types/VersionedHash.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright ConsenSys Software Inc., 2022
+ *
+ * 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.
+ */
+
+package tech.pegasys.teku.spec.logic.versions.eip4844.types;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import java.util.Objects;
+import org.apache.tuweni.bytes.Bytes;
+import org.apache.tuweni.bytes.Bytes32;
+
+public class VersionedHash {
+
+  public static final int SIZE = 32;
+
+  final Bytes version;
+  final Bytes value;
+
+  private VersionedHash(Bytes version, Bytes value) {
+    this.version = version;
+    this.value = value;
+  }
+
+  public VersionedHash(final Bytes32 value) {
+    this.version = value.slice(0, 1);
+    this.value = value.slice(1);
+  }
+
+  public static VersionedHash create(final Bytes version, final Bytes32 hash) {
+    checkArgument(version.size() == 1, "Version is 1-byte flag");
+    return new VersionedHash(version, hash.slice(1));
+  }
+
+  public boolean isVersion(final Bytes version) {
+    return this.version.equals(version);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    VersionedHash that = (VersionedHash) o;
+    return Objects.equals(version, that.version) && Objects.equals(value, that.value);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(version, value);
+  }
+}

ethereum/spec/src/main/java/tech/pegasys/teku/spec/logic/versions/eip4844/util/KZGUtilEip4844.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright ConsenSys Software Inc., 2022
+ *
+ * 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.
+ */
+
+package tech.pegasys.teku.spec.logic.versions.eip4844.util;
+
+import java.util.List;
+import tech.pegasys.teku.kzg.KZGCommitment;
+import tech.pegasys.teku.kzg.KZGProof;
+import tech.pegasys.teku.spec.datastructures.execution.versions.eip4844.Blob;
+
+public class KZGUtilEip4844 {
+
+  public static void verifyAggregateKZGProof(
+      final List<Blob> blobs,
+      final List<KZGCommitment> expectedKZGCommitments,
+      final KZGProof kzgProof) {
+    // TODO: implement
+  }
+}

ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/versions/eip4844/helpers/MiscHelpersEip4844Test.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright ConsenSys Software Inc., 2022
+ *
+ * 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.
+ */
+
+package tech.pegasys.teku.spec.logic.versions.eip4844.helpers;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static tech.pegasys.teku.spec.config.SpecConfigEip4844.BLOB_TX_TYPE;
+import static tech.pegasys.teku.spec.config.SpecConfigEip4844.VERSIONED_HASH_VERSION_KZG;
+
+import com.google.common.io.ByteSource;
+import com.google.common.io.Resources;
+import java.io.IOException;
+import java.util.List;
+import org.apache.tuweni.bytes.Bytes;
+import org.apache.tuweni.bytes.Bytes32;
+import org.junit.jupiter.api.Test;
+import tech.pegasys.teku.kzg.KZGCommitment;
+import tech.pegasys.teku.spec.Spec;
+import tech.pegasys.teku.spec.TestSpecFactory;
+import tech.pegasys.teku.spec.datastructures.execution.Transaction;
+import tech.pegasys.teku.spec.datastructures.execution.TransactionSchema;
+import tech.pegasys.teku.spec.logic.versions.eip4844.types.VersionedHash;
+
+class MiscHelpersEip4844Test {
+
+  private static final String SIGNED_BLOB_TX_LOCATION = "signed_blob_transaction.ssz";
+  private static final VersionedHash VERSIONED_HASH =
+      VersionedHash.create(
+          VERSIONED_HASH_VERSION_KZG,
+          Bytes32.fromHexString(
+              "0x391610cf24e7c540192b80ddcfea77b0d3912d94e922682f3b286eee041e6f76"));
+
+  private final Spec spec = TestSpecFactory.createMinimalEip4844();
+  private final MiscHelpersEip4844 miscHelpersEip4844 =
+      new MiscHelpersEip4844(spec.getGenesisSpecConfig());
+
+  @Test
+  public void versionedHash() {
+    final VersionedHash actual =
+        miscHelpersEip4844.kzgCommitmentToVersionedHash(
+            KZGCommitment.fromHexString(
+                "0x85d1edf1ee88f68260e750abb2c766398ad1125d4e94e1de04034075ccbd2bb79c5689b952ef15374fd03ca2b2475371"));
+    assertThat(actual).isEqualTo(VERSIONED_HASH);
+  }
+
+  @Test
+  public void txPeekBlobVersionedHashes() throws IOException {
+    final Bytes sszTx = loadData(SIGNED_BLOB_TX_LOCATION);
+    assertThat(sszTx.get(0)).isEqualTo(BLOB_TX_TYPE.get(0));
+    final TransactionSchema transactionSchema =
+        new TransactionSchema(spec.getGenesisSpecConfig().toVersionEip4844().orElseThrow());
+    final Transaction blobTx = transactionSchema.sszDeserialize(sszTx);
+    List<VersionedHash> versionedHashes = miscHelpersEip4844.txPeekBlobVersionedHashes(blobTx);
+    assertThat(versionedHashes.size()).isEqualTo(5);
+    assertThat(
+            versionedHashes.stream().allMatch(hash -> hash.isVersion(VERSIONED_HASH_VERSION_KZG)))
+        .isTrue();
+    assertThat(versionedHashes.stream().allMatch(hash -> hash.equals(VERSIONED_HASH))).isTrue();
+  }
+
+  private Bytes loadData(final String location) throws IOException {
+    final ByteSource binaryData =
+        Resources.asByteSource(Resources.getResource(MiscHelpersEip4844Test.class, location));
+    return Bytes.wrap(binaryData.read());
+  }
+}