Java BlockStore.getBlockByHash方法代碼示例

import org.ethereum.db.BlockStore; //導入方法依賴的package包/類
public static Set<ByteArrayWrapper> getAncestors(BlockStore blockStore, long blockNumber, byte[] parentHash, int limitNum) {
    Set<ByteArrayWrapper> ret = new HashSet<>();

    if (blockStore == null) {
        return ret;
    }

    int limit = (int) max(0, blockNumber - limitNum);
    Block it = blockStore.getBlockByHash(parentHash);

    while(it != null && it.getNumber() >= limit) {
        ret.add(new ByteArrayWrapper(it.getHash()));
        it = blockStore.getBlockByHash(it.getParentHash());
    }

    return ret;
}
 

import org.ethereum.db.BlockStore; //導入方法依賴的package包/類
public static Set<ByteArrayWrapper> getUsedUncles(BlockStore blockStore, long blockNumber, byte[] parentHash, int limitNum) {
    Set<ByteArrayWrapper> ret = new HashSet<>();

    if (blockStore == null) {
        return ret;
    }

    long minNumber = max(0, blockNumber - limitNum);
    Block it = blockStore.getBlockByHash(parentHash);

    while(it != null && it.getNumber() >= minNumber) {
        for (BlockHeader uncle : it.getUncleList()) {
            ret.add(new ByteArrayWrapper(uncle.getHash()));
        }
        it = blockStore.getBlockByHash(it.getParentHash());
    }

    return ret;
}
 

import org.ethereum.db.BlockStore; //導入方法依賴的package包/類
public void calculate(Block fromBlock, Block toBlock, BlockStore store) {
    Block oldBlock = fromBlock;
    Block newBlock = toBlock;

    if (oldBlock.isParentOf(newBlock)) {
        commonAncestor = oldBlock;
        newBlocks.add(newBlock);
        return;
    }

    while (newBlock.getNumber() > oldBlock.getNumber()) {
        newBlocks.add(0, newBlock);
        newBlock = store.getBlockByHash(newBlock.getParentHash());
    }

    while (oldBlock.getNumber() > newBlock.getNumber()) {
        oldBlocks.add(0, oldBlock);
        oldBlock = store.getBlockByHash(oldBlock.getParentHash());
    }

    while (!Arrays.equals(oldBlock.getHash(), newBlock.getHash())) {
        newBlocks.add(0, newBlock);
        newBlock = store.getBlockByHash(newBlock.getParentHash());
        oldBlocks.add(0, oldBlock);
        oldBlock = store.getBlockByHash(oldBlock.getParentHash());
    }

    commonAncestor = oldBlock;
}
 

import org.ethereum.db.BlockStore; //導入方法依賴的package包/類
public static List<BlockHeader> getUnclesHeaders(@Nonnull  BlockStore store, long blockNumber, byte[] parentHash, int levels) {
    List<BlockHeader> uncles = new ArrayList<>();
    Set<ByteArrayWrapper> unclesHeaders = getUncles(store, blockNumber, parentHash, levels);

    for (ByteArrayWrapper uncleHash : unclesHeaders) {
        Block uncle = store.getBlockByHash(uncleHash.getData());

        if (uncle != null) {
            uncles.add(uncle.getHeader());
        }
    }

    return uncles;
}
 

import org.ethereum.db.BlockStore; //導入方法依賴的package包/類
public static Set<ByteArrayWrapper> getFamily(BlockStore store, long blockNumber, byte[] parentHash, int levels) {
    long minNumber = max(0, blockNumber - levels);

    Set<ByteArrayWrapper> family = new HashSet<>();
    List<Block> ancestors = new ArrayList<>();

    Block parent = store.getBlockByHash(parentHash);

    while (parent != null && parent.getNumber() >= minNumber) {
        ancestors.add(0, parent);
        parent = store.getBlockByHash(parent.getParentHash());
    }

    for (Block b : ancestors) {
        family.add(new ByteArrayWrapper(b.getHash()));
    }

    for (int k = 1; k < ancestors.size(); k++) {
        Block ancestorParent = ancestors.get(k - 1);
        Block ancestor = ancestors.get(k);
        List<Block> uncles = store.getChainBlocksByNumber(ancestor.getNumber());

        for (Block uncle : uncles) {
            // TODO quick fix, the block storage should be reviewed
            if (uncle == null) {
                continue;
            }

            if (!Arrays.equals(ancestorParent.getHash(), uncle.getParentHash())) {
                continue;
            }

            if (Arrays.equals(ancestor.getHash(), uncle.getHash())) {
                continue;
            }

            family.add(new ByteArrayWrapper(uncle.getHash()));
        }
    }

    return family;
}