SingularGarden - How to implement a Blockchain - Init

blockchain_init.py

# https://github.com/singulargarden/ouroboros/blob/v0.1/ouroboros/blockchain/__init__.py
ZERO_HASH = '0' * 96

def make_block(previous_hash, payload):
    """Produce a new block"""
    previous_hash_bytes = encode(previous_hash)
    
    # Generate a fingerprint of the new state:
    # hash the fingerprint of the previous state and the payload leading to the new state.
    hash_ = sha3(previous_hash_bytes, payload)

    # Serialize the block content for storage
    bytes_ = previous_hash_bytes + b'\n' + payload

    return Block(hash=hash_, previous_hash=previous_hash, 
                 payload=payload, bytes=bytes_)

def init(path, genesis_payload=None):
    """
    Init a new blockchain folder.
    Use "now" for the initial, Genesis, payload if not provided.
    """
    # Prepare the initial payload
    if genesis_payload is None:
        genesis_payload = bytes(str(time.time()), encoding="ascii")

    # Create the initial block and the blockchain metadata
    genesis_block = make_block(ZERO_HASH, genesis_payload)
    descr = make_descr(genesis_block.hash, genesis_block.hash)

    # Store the block and its description
    update_storage(path, descr, genesis_block)

    return genesis_block.hash