def lightweight():
fullchain = [json.loads(block) for block in blockchain.chain]
lightWeight = []
for block in fullchain:
blockObject = Block(block['index'], block['transactions'],
block['timestamp'], block['previous_hash'],
block['difficulty'])
blockObject.merkle_root = block['merkle_root']
blockObject.nonce = block['nonce']
blockObject.difficulty = block['difficulty']
lightWeight.append(blockObject.to_dict())
response = {'chain': json.dumps(lightWeight), 'length': len(lightWeight)}
return jsonify(response), 200
