# -*- coding: utf-8 -*-

from graphenecommon.instance import AbstractBlockchainInstanceProvider

class SharedInstance:

""" This class merely offers a singelton for the Blockchain Instance

"""

instance = None

config = {}

class BlockchainInstance(AbstractBlockchainInstanceProvider):

""" This is a class that allows compatibility with previous

naming conventions

"""

_sharedInstance = SharedInstance

def __init__(self, *args, **kwargs):

# Also allow 'bitshares_instance'

if kwargs.get("bitshares_instance"):

kwargs["blockchain_instance"] = kwargs["bitshares_instance"]

AbstractBlockchainInstanceProvider.__init__(self, *args, **kwargs)

def get_instance_class(self):

""" Should return the Chain instance class, e.g. `bitshares.BitShares`

"""

import bitshares as bts

return bts.BitShares

@property

def bitshares(self):

""" Alias for the specific blockchain

"""

return self.blockchain

def shared_blockchain_instance():

return BlockchainInstance().shared_blockchain_instance()

def set_shared_blockchain_instance(instance):

instance.clear_cache()

# instance.set_shared_instance()

BlockchainInstance.set_shared_blockchain_instance(instance)

def set_shared_config(config):

BlockchainInstance.set_shared_config(config)

shared_bitshares_instance = shared_blockchain_instance

set_shared_bitshares_instance = set_shared_blockchain_instance