How blocks are linked in the Hyperledger Fabric blockchain

Question

Bitcoin blockchain uses the hash of previous block to link the blocks. Is it the same in Hyperledger Fabric?
How does it look in Hyperledger Fabric?

Answer 1

The structure of block in Hyperledger Fabric is very similar to that of bitcoin. The hash(H) is
computed as follows:

H(H) = hash([transactions] || H(N-1) || N)

The block looks something like this:

message Block {
    BlockHeader header = 1;
    BlockData data = 2;
    BlockMetadata metadata = 3;
}

and the definition of Blockheader is:

message BlockHeader {
    uint64 number = 1; // The position in the blockchain
    bytes previous_hash = 2; // The hash of the previous block header
    bytes data_hash = 3; // The hash of the BlockData, by MerkleTree
}

Check out https://github.com/hyperledger/fabric/blob/master/protos/common/common.proto to know more.