Package com.exonum.binding.core.blockchain

Class Block

java.lang.Object
com.exonum.binding.core.blockchain.Block
public abstract class Block
extends Object
Exonum block header data structure.

A block is essentially a list of transactions, which is a result of the consensus algorithm (thus authenticated by the supermajority of validators) and is applied atomically to the blockchain state.

This structure only contains the amount of transactions and the transactions root hash as well as other information, but not the transactions themselves.

See Also:
Blockchain

  • Constructor Details

  • Method Details

    • getBlockHash

      public abstract HashCode getBlockHash()
      Returns the SHA-256 hash of this block.

    • getProposerId

      public abstract int getProposerId()
      Identifier of the leader node which has proposed the block.

    • getHeight

      public abstract long getHeight()
      Returns the height of this block which is a distance between the last block and the "genesis" block. Genesis block has 0 height. Therefore, the blockchain height is equal to the number of blocks plus one.

      The height also identifies each block in the blockchain.

    • isEmpty

      public final boolean isEmpty()
      Returns true if this block is empty: contains no transactions.

    • getNumTransactions

      public abstract int getNumTransactions()
      Number of transactions in this block.

    • getPreviousBlockHash

      public abstract HashCode getPreviousBlockHash()
      Hash link to the previous block in the blockchain.

    • getTxRootHash

      public abstract HashCode getTxRootHash()
      Root hash of the Merkle tree of transactions in this block. These transactions can be accessed with Blockchain.getBlockTransactions(Block).

    • getStateHash

      public abstract HashCode getStateHash()
      Hash of the blockchain state after applying transactions in the block.
      See Also:
      Schema.getStateHashes()

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • typeAdapter

      public static com.google.gson.TypeAdapter<Block> typeAdapter​(com.google.gson.Gson gson)
      Provides a Gson type adapter for this class.
      See Also:
      CoreTypeAdapterFactory

    • builder

      public static Block.Builder builder()
      Creates a new block builder.