def test_get_asset_ids(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()
# get the asset_ids and check that they are the same as the `CREATE`
# transactions
asset_ids = Block.get_asset_ids(block_dict)
assert asset_ids == [tx.id for tx in txs[:-1]]
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_decouple_assets(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()
assert len(assets_from_block) == 3
for i in range(3):
assert assets_from_block[i]['data'] == assets[i]
assert assets_from_block[i]['id'] == txs[i].id
# check the `TRANSFER` transaction was not changed
assert block.transactions[3].to_dict() == \
block_dict['block']['transactions'][3]
def test_couple_assets(self, b, alice):
from bigchaindb.models import Block, Transaction
assets = [
{
'msg': '1'
},
{
'msg': '2'
},
{
'msg': '3'
},
]
txs = []
# create 3 assets
for asset in assets:
tx = Transaction.create([alice.public_key],
[([alice.public_key], 1)],
asset=asset)
tx.sign([alice.private_key])
txs.append(tx)
# create a `TRANSFER` transaction.
# the asset in `TRANSFER` transactions is not extracted
tx = Transaction.transfer(txs[0].to_inputs(),
[([alice.public_key], 1)],
asset_id=txs[0].id)
tx.sign([alice.private_key])
txs.append(tx)
# create the block
block = Block(txs)
# decouple assets
assets_from_block, block_dict = block.decouple_assets()
# reconstruct the block
block_dict_reconstructed = Block.couple_assets(block_dict,
assets_from_block)
# check that the reconstructed block is the same as the original block
assert block == Block.from_dict(block_dict_reconstructed)
def create_block():
ts = str(random.random())
block = Block(transactions=[create_tx], timestamp=ts)
b.write_block(block)
return block.decouple_assets()[1]
