darkfi/script/research/dpos/ouroboros/blockchain.py

from ouroboros.logger import Logger
'''
Non-forkable Blockchain for simplicity
#TODO consider forkable property
'''
class Blockchain(object):
    def __init__(self, R):
        self.blocks = []
        self.log = Logger(self)
        self.R = R # how many slots in single epoch
    
    @property
    def epoch_length(self):
        return self.R

    def __repr__(self):
        buff=''
        for i in range(len(self.blocks)):
            buff+=self.blocks[i]
        return buff
    
    def __getitem__(self, i):
        return self.blocks[i]

    def __len__(self):
        return len(self.blocks)

    def __add_block(self, block):
        self.blocks.append(block)

    def add_epoch(self, epoch):
        for idx, block in enumerate(epoch):
            if not block.empty:
                self.__add_block(block)
            else:
                self.log.info(f"met an empty block at index of index: {block.index},\nrelative slot:{idx}\nabsolute slot: {self.length*idx+block.slot}")