SingularGarden - How to implement a Blockchain - Add

blockchain_add.py

# https://github.com/singulargarden/ouroboros/blob/v0.1/ouroboros/blockchain/__init__.py

def add(root_path, proposed_block_hash, payload):
    """
    Make sure we agree on the proposed hash add the block to our chain.
    Use this when a block comes from an external source.
    """
    new_descr, block = prepare_block(root_path, payload)

    # Identical to append but we verify the hash!
    if block.hash != proposed_block_hash:
        raise HashDoNotMatchException()

    store_new_block(root_path, new_descr, block)
    return block.hash