def test_from_db(self, b):
from bigchaindb.models import Block, Transaction
assets = [
{'msg': '1'},
{'msg': '2'},
{'msg': '3'},
]
txs = []
# create 3 assets
for asset in assets:
tx = Transaction.create([b.me], [([b.me], 1)], asset=asset)
txs.append(tx)
# create a `TRANSFER` transaction.
# the asset in `TRANSFER` transactions is not extracted
tx = Transaction.transfer(txs[0].to_inputs(), [([b.me], 1)],
asset_id=txs[0].id)
txs.append(tx)
# create the block
block = Block(txs)
# decouple assets
assets_from_block, block_dict = block.decouple_assets()
# write the assets and block separately
b.write_assets(assets_from_block)
b.write_block(block)
# check the reconstructed block is the same as the original block
block_from_db = Block.from_db(b, block_dict)
assert block == block_from_db
def test_get_last_voted_block_returns_genesis_if_no_votes_has_been_casted(
self, b):
from bigchaindb.models import Block
from bigchaindb.backend import query
genesis = query.get_genesis_block(b.connection)
genesis = Block.from_db(b, genesis)
gb = b.get_last_voted_block()
assert gb == genesis
assert b.validate_block(gb) == gb
def validate_block(self, block_dict):
if not self.bigchain.has_previous_vote(block_dict['id']):
try:
block = Block.from_db(self.bigchain, block_dict, from_dict_kwargs={
'tx_construct': FastTransaction
})
except (exceptions.InvalidHash):
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block_dict['id'], [self.invalid_dummy_tx]
try:
block._validate_block(self.bigchain)
except exceptions.ValidationError:
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block.id, [self.invalid_dummy_tx]
return block.id, block_dict['block']['transactions']
def validate_block(self, block_dict):
if not self.bigchain.has_previous_vote(block_dict['id']):
try:
block = Block.from_db(self.bigchain, block_dict, from_dict_kwargs={
'tx_construct': FastTransaction
})
except (exceptions.InvalidHash):
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block_dict['id'], [self.invalid_dummy_tx]
try:
block._validate_block(self.bigchain)
except exceptions.ValidationError:
# XXX: if a block is invalid we should skip the `validate_tx`
# step, but since we are in a pipeline we cannot just jump to
# another function. Hackish solution: generate an invalid
# transaction and propagate it to the next steps of the
# pipeline.
return block.id, [self.invalid_dummy_tx]
return block.id, block_dict['block']['transactions']
