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Implemented decoding and hash rules for execution requests (#8668)
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111 changes: 111 additions & 0 deletions
111
...gasys/teku/spec/datastructures/execution/versions/electra/ExecutionRequestsDataCodec.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| /* | ||
| * Copyright Consensys Software Inc., 2024 | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package tech.pegasys.teku.spec.datastructures.execution.versions.electra; | ||
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| import com.google.common.annotations.VisibleForTesting; | ||
| import java.util.List; | ||
| import org.apache.tuweni.bytes.Bytes; | ||
| import org.apache.tuweni.bytes.Bytes32; | ||
| import tech.pegasys.teku.infrastructure.crypto.Hash; | ||
| import tech.pegasys.teku.infrastructure.ssz.SszList; | ||
| import tech.pegasys.teku.spec.datastructures.execution.ExecutionRequestsBuilder; | ||
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| /* | ||
| Implement the rules for decoding and hashing execution requests according to https://eips.ethereum.org/EIPS/eip-7685 | ||
| */ | ||
| public class ExecutionRequestsDataCodec { | ||
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| private static final int EXPECTED_REQUEST_DATA_ELEMENTS = 3; | ||
| private static final Bytes DEPOSIT_REQUEST_PREFIX = Bytes.of(DepositRequest.REQUEST_TYPE); | ||
| private static final Bytes WITHDRAWAL_REQUEST_PREFIX = Bytes.of(WithdrawalRequest.REQUEST_TYPE); | ||
| private static final Bytes CONSOLIDATION_REQUEST_PREFIX = | ||
| Bytes.of(ConsolidationRequest.REQUEST_TYPE); | ||
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| private final ExecutionRequestsSchema executionRequestsSchema; | ||
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| public ExecutionRequestsDataCodec(final ExecutionRequestsSchema executionRequestsSchema) { | ||
| this.executionRequestsSchema = executionRequestsSchema; | ||
| } | ||
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| public ExecutionRequests decode(final List<Bytes> executionRequestData) { | ||
| if (executionRequestData.size() != EXPECTED_REQUEST_DATA_ELEMENTS) { | ||
| throw new IllegalArgumentException( | ||
| "Invalid number of execution request data elements: expected " | ||
| + EXPECTED_REQUEST_DATA_ELEMENTS | ||
| + ", received " | ||
| + executionRequestData.size()); | ||
| } | ||
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| final ExecutionRequestsBuilder executionRequestsBuilder = | ||
| new ExecutionRequestsBuilderElectra(executionRequestsSchema); | ||
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| for (int index = 0; index < executionRequestData.size(); index++) { | ||
| // The request type is implicitly defined as the index of the element in executionRequestData | ||
| switch ((byte) index) { | ||
| case DepositRequest.REQUEST_TYPE -> | ||
| executionRequestsBuilder.deposits( | ||
| executionRequestsSchema | ||
| .getDepositRequestsSchema() | ||
| .sszDeserialize(executionRequestData.get(index)) | ||
| .asList()); | ||
| case WithdrawalRequest.REQUEST_TYPE -> | ||
| executionRequestsBuilder.withdrawals( | ||
| executionRequestsSchema | ||
| .getWithdrawalRequestsSchema() | ||
| .sszDeserialize(executionRequestData.get(index)) | ||
| .asList()); | ||
| case ConsolidationRequest.REQUEST_TYPE -> | ||
| executionRequestsBuilder.consolidations( | ||
| executionRequestsSchema | ||
| .getConsolidationRequestsSchema() | ||
| .sszDeserialize(executionRequestData.get(index)) | ||
| .asList()); | ||
| default -> throw new IllegalArgumentException("Invalid execution request type: " + index); | ||
| } | ||
| } | ||
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| return executionRequestsBuilder.build(); | ||
| } | ||
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| @VisibleForTesting | ||
| List<Bytes> encodeWithTypePrefix(final ExecutionRequests executionRequests) { | ||
| final SszList<DepositRequest> depositRequestsSszList = | ||
| executionRequestsSchema | ||
| .getDepositRequestsSchema() | ||
| .createFromElements(executionRequests.getDeposits()); | ||
| final SszList<WithdrawalRequest> withdrawalRequestsSszList = | ||
| executionRequestsSchema | ||
| .getWithdrawalRequestsSchema() | ||
| .createFromElements(executionRequests.getWithdrawals()); | ||
| final SszList<ConsolidationRequest> consolidationRequestsSszList = | ||
| executionRequestsSchema | ||
| .getConsolidationRequestsSchema() | ||
| .createFromElements(executionRequests.getConsolidations()); | ||
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| return List.of( | ||
| Bytes.concatenate(DEPOSIT_REQUEST_PREFIX, depositRequestsSszList.sszSerialize()), | ||
| Bytes.concatenate(WITHDRAWAL_REQUEST_PREFIX, withdrawalRequestsSszList.sszSerialize()), | ||
| Bytes.concatenate( | ||
| CONSOLIDATION_REQUEST_PREFIX, consolidationRequestsSszList.sszSerialize())); | ||
| } | ||
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| public Bytes32 hash(final ExecutionRequests executionRequests) { | ||
| final Bytes sortedEncodedRequests = | ||
| encodeWithTypePrefix(executionRequests).stream() | ||
| .map(Hash::sha256) | ||
| .map(Bytes.class::cast) | ||
| .reduce(Bytes.EMPTY, Bytes::concatenate); | ||
| return Hash.sha256(sortedEncodedRequests); | ||
| } | ||
| } |
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