def close_asset(name):
"""Create an CloseOffer txn and wrap it in a Batch and list.
Args:
name (str): The identifier of the Offer.
Returns:
tuple: List of Batch, signature tuple
"""
global context
global signer
batcher_private_key = Secp256k1PrivateKey.from_hex(BATCHER_PRIVATE_KEY)
batcher_signer = CryptoFactory(context).new_signer(batcher_private_key)
public_key = signer.get_public_key().as_hex()
inputs = [addresshandler.make_asset_address(asset_id=name)]
outputs = [addresshandler.make_asset_address(asset_id=name)]
close_txn = payload_pb2.CloseAsset(
name=name)
payload = payload_pb2.TransactionPayload(
payload_type=payload_pb2.TransactionPayload.CLOSE_ASSET,
close_asset=close_txn)
return make_header_and_batch(
payload=payload,
inputs=inputs,
outputs=outputs,
txn_key=signer,
batch_key=batcher_signer)
def create_asset(name, description, no_steps, rules):
"""Create a CreateAsset txn and wrap it in a batch and list.
Args:
name (str): The name of the asset.
description (str): A description of the asset.
no_steps (int): number of approval steps for asset
rules (list): List of protobuf.rule_pb2.Rule
Returns:
tuple: List of Batch, signature tuple
"""
global context
global signer
#context = create_context('secp256k1')
#private_key = context.new_random_private_key()
#signer = CryptoFactory(context).new_signer(private_key)
batcher_private_key = Secp256k1PrivateKey.from_hex(BATCHER_PRIVATE_KEY)
batcher_signer = CryptoFactory(context).new_signer(batcher_private_key)
public_key = signer.get_public_key().as_hex()
inputs = [addresshandler.make_asset_address(asset_id=name),
addresshandler.make_account_address(account_id=public_key)]
outputs = [addresshandler.make_asset_address(asset_id=name)]
asset = payload_pb2.CreateAsset(
name=name,
description=description,
num_steps=no_steps,
rules=rules
)
payload = payload_pb2.TransactionPayload(
payload_type=payload_pb2.TransactionPayload.CREATE_ASSET,
create_asset=asset)
return make_header_and_batch(
payload=payload,
inputs=inputs,
outputs=outputs,
txn_key=signer,
batch_key=batcher_signer)
def close_asset(self, name):
address = addresshandler.make_asset_address(name)
container = self._get_asset_container(self._state_entries, address)
asset = None
try:
asset = self._delete_asset_from_container(container, name)
except KeyError:
# We are fine with returning None for an asset that doesn't exist
pass
return self._context.delete_state([address], self._timeout)
def get_asset(self, name):
address = addresshandler.make_asset_address(asset_id=name)
self._state_entries.extend(
self._context.get_state(addresses=[address],
timeout=self._timeout))
container = self._get_asset_container(self._state_entries, address)
asset = None
try:
asset = self._get_asset_from_container(container, name)
except KeyError:
# We are fine with returning None for an asset that doesn't exist
pass
return asset
def approve_asset(name,
apprvl_step):
"""Create an AcceptOffer txn and wrap it in a Batch and list.
Args:
name (str): The identifier of the Offer.
apprvl_step (int): The number of units of exchange.
Returns:
tuple: List of Batch, signature tuple
"""
global context
global signer
batcher_private_key = Secp256k1PrivateKey.from_hex(BATCHER_PRIVATE_KEY)
batcher_signer = CryptoFactory(context).new_signer(batcher_private_key)
public_key = signer.get_public_key().as_hex()
inputs = [addresshandler.make_asset_address(asset_id=name),
addresshandler.make_account_address(account_id=public_key)]
outputs = [addresshandler.make_asset_address(asset_id=name)]
approve_txn = payload_pb2.ApproveAsset(
name=name,
approval_step=apprvl_step)
payload = payload_pb2.TransactionPayload(
payload_type=payload_pb2.TransactionPayload.APPROVE_ASSET,
approve_asset=approve_txn)
return make_header_and_batch(
payload=payload,
inputs=inputs,
outputs=outputs,
txn_key=signer,
batch_key=batcher_signer)
def approve_asset(self, name, approver_level):
address = addresshandler.make_asset_address(name)
container = self._get_asset_container(self._state_entries, address)
try:
asset = self._get_asset_from_container(container, name)
except KeyError:
#asset = container.entries.add()
print("Asset {} not found for approval".format(name))
if (asset.curr_step <= approver_level) and (asset.curr_step <=
asset.num_steps):
asset.curr_step = asset.curr_step + 1
state_entries_send = {}
state_entries_send[address] = container.SerializeToString()
return self._context.set_state(state_entries_send, self._timeout)
def set_asset(self, name, description, num_steps, rules):
address = addresshandler.make_asset_address(name)
container = self._get_asset_container(self._state_entries, address)
try:
asset = self._get_asset_from_container(container, name)
except KeyError:
asset = container.entries.add()
asset.name = name
asset.description = description
asset.num_steps = num_steps
asset.rules.extend(rules)
state_entries_send = {}
state_entries_send[address] = container.SerializeToString()
return self._context.set_state(state_entries_send, self._timeout)