def stake_4_blocks(block_time):
    for peer in range(2):
        for i in range(2):
            block_time = self.generate_pos(peer, block_time)
        sync_blocks(self.nodes)
    return block_time
def stake_4_blocks(block_time):
    for peer in range(2):
        for i in range(2):
            block_time = self.generate_pos(peer, block_time)
        sync_blocks(self.nodes)
    return block_time