def from_json(cls, json: dict) -> ContractMethodDescriptor:
"""
Parse object out of JSON data.
Args:
json: a dictionary.
Raises:
KeyError: if the data supplied does not contain the necessary keys.
ValueError: if the manifest name property has an incorrect format.
ValueError: if the offset is negative.
"""
c = cls(name=contracts.validate_type(json['name'], str),
offset=contracts.validate_type(json['offset'], int),
parameters=list(
map(
lambda p: contracts.ContractParameterDefinition.
from_json(p), json['parameters'])),
return_type=contracts.ContractParameterType[
contracts.validate_type(json['returntype'], str).upper()],
safe=contracts.validate_type(json['safe'], bool))
if c.name is None or len(c.name) == 0:
raise ValueError("Format error - invalid 'name'")
if c.offset < 0:
raise ValueError("Format error - negative offset not allowed")
return c
def _deserialize_from_json(self, json: dict) -> None:
if json['name'] is None:
self.name = ""
else:
self.name = contracts.validate_type(json['name'], str)
self.abi = contracts.ContractABI.from_json(json['abi'])
self.groups = list(
map(lambda g: ContractGroup.from_json(g), json['groups']))
if len(json['features']) != 0:
raise ValueError(
"Manifest features is reserved and cannot have any content at this time"
)
self.supported_standards = list(
map(lambda ss: contracts.validate_type(ss, str),
json['supportedstandards']))
self.permissions = list(
map(lambda p: ContractPermission.from_json(p),
json['permissions']))
if json['trusts'] == '*':
self.trusts = WildcardContainer.create_wildcard()
else:
self.trusts = WildcardContainer.from_json_as_type(
{'wildcard': json['trusts']}, lambda t: contracts.
ContractPermissionDescriptor.from_json({'contract': t}))
# converting json key/value back to default WildcardContainer format
self.extra = json['extra']
def _deserialize_from_json(self, json: dict) -> None:
if json['name'] is None:
self.name = ""
else:
self.name = contracts.validate_type(json['name'], str)
self.abi = contracts.ContractABI.from_json(json['abi'])
self.groups = list(map(lambda g: ContractGroup.from_json(g), json['groups']))
self.supported_standards = list(map(lambda ss: contracts.validate_type(ss, str), json['supportedstandards']))
self.permissions = list(map(lambda p: ContractPermission.from_json(p), json['permissions']))
self.trusts = WildcardContainer.from_json_as_type(
{'wildcard': json['trusts']},
lambda t: types.UInt160.from_string(contracts.validate_type(t, str)))
# converting json key/value back to default WildcardContainer format
self.extra = json['extra']
def from_json(cls, json: dict) -> ContractGroup:
"""
Parse object out of JSON data.
Args:
json: a dictionary.
Raises:
KeyError: if the data supplied does not contain the necessary keys.
ValueError: if the signature length is not 64.
"""
pubkey = contracts.validate_type(json['pubkey'], str)
c = cls(
public_key=cryptography.ECPoint.deserialize_from_bytes(binascii.unhexlify(pubkey)),
signature=base64.b64decode(contracts.validate_type(json['signature'], str).encode('utf8'))
)
if len(c.signature) != 64:
raise ValueError("Format error - invalid signature length")
return c
def from_json(cls, json: dict) -> ContractParameterDefinition:
"""
Parse object out of JSON data.
Args:
json: a dictionary.
Raises:
KeyError: if the data supplied does not contain the necessary keys.
ValueError: if the manifest name property has an incorrect format.
ValueError: if the type is VOID.
"""
c = cls(name=contracts.validate_type(json['name'], str),
type=contracts.ContractParameterType[contracts.validate_type(
json['type'], str).upper()])
if c.name is None or len(c.name) == 0:
raise ValueError("Format error - invalid 'name'")
if c.type == contracts.ContractParameterType.VOID:
raise ValueError(
"Format error - parameter type VOID is not allowed")
return c
def from_json(cls, json: dict) -> ContractEventDescriptor:
"""
Parse object out of JSON data.
Args:
json: a dictionary.
Raises:
KeyError: if the data supplied does not contain the necessary key.
ValueError: if the 'name' property has an incorrect format
"""
c = cls(name=contracts.validate_type(json['name'], str),
parameters=list(
map(lambda p: ContractParameterDefinition.from_json(p),
json['parameters'])))
if c.name is None or len(c.name) == 0:
raise ValueError("Format error - invalid 'name'")
return c
