def get_blocks(self, height, limit, serialized, with_transactions=False):
blocks = (Block.select().where(
Block.height.between(height,
height + limit)).order_by(Block.height.asc()))
if with_transactions:
block_ids = [block.id for block in blocks]
transactions = (Transaction.select().where(
Transaction.block_id.in_(block_ids)).order_by(
Transaction.block_id.asc(), Transaction.sequence.asc()))
transactions_map = defaultdict(list)
for trans in transactions:
# TODO: implement from_object on transaction and use that, instead of
# creating it from serialized data.
if serialized:
transactions_map[trans.block_id].append(trans.serialized)
else:
transactions_map[trans.block_id].append(
from_serialized(trans.serialized))
crypto_blocks = []
for block in blocks:
crypto_block = CryptoBlock.from_object(block)
if with_transactions:
crypto_block.transactions = transactions_map[block.id]
crypto_blocks.append(crypto_block)
return crypto_blocks
def get_block_by_id(self, block_id):
try:
block = Block.get(Block.id == block_id)
except Block.DoesNotExist:
return None
else:
return CryptoBlock.from_object(block)
def get_last_block(self):
"""Get the last block
Returns None if block can't be found.
"""
try:
block = Block.select().order_by(Block.height.desc()).get()
except Block.DoesNotExist:
return None
else:
crypto_block = CryptoBlock.from_object(block)
return crypto_block
def get_blocks_by_heights(self, heights):
if not isinstance(heights, list):
raise Exception("heights must be a type of list")
blocks = Block.select().where(Block.height.in_(heights))
return [CryptoBlock.from_object(block) for block in blocks]
def get_blocks_by_id(self, block_ids):
blocks = (Block.select().where(Block.id.in_(block_ids)).order_by(
Block.height.desc()))
return [CryptoBlock.from_object(block) for block in blocks]