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...n/java/org/hyperledger/besu/ethereum/eth/manager/peertask/task/GetBodiesFromPeerTask.java
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| /* | ||
| * Copyright contributors to Hyperledger Besu. | ||
| * | ||
| * 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. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| package org.hyperledger.besu.ethereum.eth.manager.peertask.task; | ||
|
|
||
| import org.hyperledger.besu.ethereum.core.Block; | ||
| import org.hyperledger.besu.ethereum.core.BlockBody; | ||
| import org.hyperledger.besu.ethereum.core.BlockHeader; | ||
| import org.hyperledger.besu.ethereum.eth.EthProtocol; | ||
| import org.hyperledger.besu.ethereum.eth.manager.EthPeer; | ||
| import org.hyperledger.besu.ethereum.eth.manager.peertask.InvalidPeerTaskResponseException; | ||
| import org.hyperledger.besu.ethereum.eth.manager.peertask.PeerTask; | ||
| import org.hyperledger.besu.ethereum.eth.manager.peertask.PeerTaskValidationResponse; | ||
| import org.hyperledger.besu.ethereum.eth.messages.BlockBodiesMessage; | ||
| import org.hyperledger.besu.ethereum.eth.messages.GetBlockBodiesMessage; | ||
| import org.hyperledger.besu.ethereum.mainnet.BodyValidation; | ||
| import org.hyperledger.besu.ethereum.mainnet.ProtocolSchedule; | ||
| import org.hyperledger.besu.ethereum.p2p.rlpx.wire.MessageData; | ||
| import org.hyperledger.besu.ethereum.p2p.rlpx.wire.SubProtocol; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.function.Predicate; | ||
|
|
||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * Implements PeerTask for getting block bodies from peers, and matches headers to bodies to supply | ||
| * full blocks | ||
| */ | ||
| public class GetBodiesFromPeerTask implements PeerTask<List<Block>> { | ||
|
|
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| private static final Logger LOG = LoggerFactory.getLogger(GetBodiesFromPeerTask.class); | ||
|
|
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| private static final int DEFAULT_RETRIES_AGAINST_OTHER_PEERS = 5; | ||
|
|
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| private final List<BlockHeader> blockHeaders; | ||
| private final ProtocolSchedule protocolSchedule; | ||
| private final int allowedRetriesAgainstOtherPeers; | ||
|
|
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| private final long requiredBlockchainHeight; | ||
| private final List<Block> blocks = new ArrayList<>(); | ||
| private final boolean isPoS; | ||
|
|
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| public GetBodiesFromPeerTask( | ||
| final List<BlockHeader> blockHeaders, final ProtocolSchedule protocolSchedule) { | ||
| this(blockHeaders, protocolSchedule, DEFAULT_RETRIES_AGAINST_OTHER_PEERS); | ||
| } | ||
|
|
||
| public GetBodiesFromPeerTask( | ||
| final List<BlockHeader> blockHeaders, | ||
| final ProtocolSchedule protocolSchedule, | ||
| final int allowedRetriesAgainstOtherPeers) { | ||
| if (blockHeaders == null || blockHeaders.isEmpty()) { | ||
| throw new IllegalArgumentException("Block headers must not be empty"); | ||
| } | ||
|
|
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| this.blockHeaders = blockHeaders; | ||
| this.protocolSchedule = protocolSchedule; | ||
| this.allowedRetriesAgainstOtherPeers = allowedRetriesAgainstOtherPeers; | ||
|
|
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| this.requiredBlockchainHeight = | ||
| blockHeaders.stream() | ||
| .mapToLong(BlockHeader::getNumber) | ||
| .max() | ||
| .orElse(BlockHeader.GENESIS_BLOCK_NUMBER); | ||
| this.isPoS = protocolSchedule.getByBlockHeader(blockHeaders.getLast()).isPoS(); | ||
| } | ||
|
|
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| @Override | ||
| public SubProtocol getSubProtocol() { | ||
| return EthProtocol.get(); | ||
| } | ||
|
|
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| @Override | ||
| public MessageData getRequestMessage() { | ||
| return GetBlockBodiesMessage.create( | ||
| blockHeaders.stream().map(BlockHeader::getBlockHash).toList()); | ||
| } | ||
|
|
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| @Override | ||
| public List<Block> processResponse(final MessageData messageData) | ||
| throws InvalidPeerTaskResponseException { | ||
| // Blocks returned by this method are in the same order as the headers, but might not be | ||
| // complete | ||
| if (messageData == null) { | ||
| throw new InvalidPeerTaskResponseException(); | ||
| } | ||
| final BlockBodiesMessage blocksMessage = BlockBodiesMessage.readFrom(messageData); | ||
| final List<BlockBody> blockBodies = blocksMessage.bodies(protocolSchedule); | ||
| if (blockBodies.isEmpty() || blockBodies.size() > blockHeaders.size()) { | ||
| throw new InvalidPeerTaskResponseException(); | ||
| } | ||
|
|
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| for (int i = 0; i < blockBodies.size(); i++) { | ||
| final BlockBody blockBody = blockBodies.get(i); | ||
| final BlockHeader blockHeader = blockHeaders.get(i); | ||
| if (!blockBodyMatchesBlockHeader(blockBody, blockHeader)) { | ||
| LOG.atDebug().setMessage("Received block body does not match block header").log(); | ||
| throw new InvalidPeerTaskResponseException(); | ||
| } | ||
|
|
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| blocks.add(new Block(blockHeader, blockBody)); | ||
| } | ||
| return blocks; | ||
| } | ||
|
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| @Override | ||
| public int getRetriesWithOtherPeer() { | ||
| return allowedRetriesAgainstOtherPeers; | ||
| } | ||
|
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| private boolean blockBodyMatchesBlockHeader( | ||
| final BlockBody blockBody, final BlockHeader blockHeader) { | ||
| // this method validates that the block body matches the block header by calculating the roots | ||
| // of the block body and comparing them to the roots in the block header | ||
| if (!BodyValidation.transactionsRoot(blockBody.getTransactions()) | ||
| .equals(blockHeader.getTransactionsRoot())) { | ||
| return false; | ||
| } | ||
| if (!BodyValidation.ommersHash(blockBody.getOmmers()).equals(blockHeader.getOmmersHash())) { | ||
| return false; | ||
| } | ||
| if (!blockBody | ||
| .getWithdrawals() | ||
| .map(BodyValidation::withdrawalsRoot) | ||
| .equals(blockHeader.getWithdrawalsRoot())) { | ||
| return false; | ||
| } | ||
|
|
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| return true; | ||
| } | ||
|
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| @Override | ||
| public Predicate<EthPeer> getPeerRequirementFilter() { | ||
| return (ethPeer) -> | ||
| isPoS || ethPeer.chainState().getEstimatedHeight() >= requiredBlockchainHeight; | ||
| } | ||
|
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| @Override | ||
| public PeerTaskValidationResponse validateResult(final List<Block> result) { | ||
| if (result.isEmpty()) { | ||
| return PeerTaskValidationResponse.NO_RESULTS_RETURNED; | ||
| } | ||
| return PeerTaskValidationResponse.RESULTS_VALID_AND_GOOD; | ||
| } | ||
|
|
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| public List<BlockHeader> getBlockHeaders() { | ||
| return blockHeaders; | ||
| } | ||
| } |
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