Consortium_Blockchain.py

from Block import Block
import copy

class Consortium_Blockchain:

	def __init__(self):
		self.chain = []
		self.tmpchain = []
		self.tmpdata = []

	def return_chain_structure(self):
		return self.chain

	def return_chain_length(self):
		return len(self.chain)

	def return_last_block(self):
		if len(self.chain) > 0:
			return self.chain[-1]
		else:
			# blockchain doesn't even have its genesis block
			return None

	def return_last_block_pow_proof(self):
		if len(self.chain) > 0:
			return self.return_last_block().compute_hash(hash_entire_block=True)
		else:
			return None

	def replace_chain(self, chain):
		self.chain = copy.copy(chain)

	def append_block(self, block):
		self.chain.append(copy.copy(block))

	def new_local_block(self, block, cdata = None):
		self.tmpchain.append(block)
		if cdata is not None:
			self.tmpdata.append(cdata)

	def return_local_chain(self):
		return self.tmpchain
	
	def return_last_cdata(self):
		if len(self.tmpdata) > 0:
			return self.tmpdata[-1]
		else:
			return None