def get_type(arg):
if isinstance(arg, LLLnode):
return canonicalize_type(arg.typ)
elif hasattr(arg, "annotation"):
return canonicalize_type(
parse_type(arg.annotation, None, sigs, custom_structs=custom_structs,)
)
def _generate_output_abi(self, custom_units_descriptions=None):
t = self.output_type
if not t:
return []
elif isinstance(t, TupleType):
res = [(canonicalize_type(x),
print_unit(unit_from_type(x), custom_units_descriptions))
for x in t.members]
elif isinstance(t, TupleLike):
res = [(canonicalize_type(x),
print_unit(unit_from_type(x), custom_units_descriptions))
for x in t.tuple_members()]
else:
res = [(canonicalize_type(t),
print_unit(unit_from_type(t), custom_units_descriptions))]
abi_outputs = [{
"type": x,
"name": "out",
"unit": unit
} for x, unit in res]
for abi_output in abi_outputs:
delete_unit_if_empty(abi_output)
return abi_outputs
def get_type(arg):
if isinstance(arg, LLLnode):
return canonicalize_type(arg.typ)
elif hasattr(arg, 'annotation'):
return canonicalize_type(
parse_type(arg.annotation,
None,
sigs,
custom_units=custom_units))
def test_canonicalize_type():
# Non-basetype not allowed
with raises(Exception):
canonicalize_type(int)
# List of byte arrays not allowed
a = ListType(ByteArrayType(12), 2)
with raises(Exception):
canonicalize_type(a)
# Test ABI format of multiple args.
c = TupleType([BaseType('int128'), BaseType('address')])
assert canonicalize_type(c) == "(int128,address)"
def _generate_output_abi(self):
t = self.output_type
if not t:
return []
elif isinstance(t, TupleType):
res = [canonicalize_type(x) for x in t.members]
else:
res = [canonicalize_type(t)]
return [{"type": x, "name": "out"} for x in res]
def to_abi_dict(self, custom_units_descriptions=None):
func_type = "function"
if self.name == "__init__":
func_type = "constructor"
if self.name == "__default__":
func_type = "fallback"
abi_dict = {
"name": self.name,
"outputs": self._generate_output_abi(custom_units_descriptions),
"inputs": [{
"type": canonicalize_type(arg.typ),
"name": arg.name,
"unit": print_unit(unit_from_type(arg.typ), custom_units_descriptions)
} for arg in self.args],
"constant": self.const,
"payable": self.payable,
"type": func_type
}
for abi_input in abi_dict['inputs']:
delete_unit_if_empty(abi_input)
if self.name in ('__default__', '__init__'):
del abi_dict['name']
if self.name == '__default__':
del abi_dict['inputs']
del abi_dict['outputs']
return abi_dict
def to_abi_dict(self, custom_units_descriptions=None):
abi_dict = {
"name":
self.name,
"outputs":
self._generate_output_abi(custom_units_descriptions),
"inputs": [{
"type":
canonicalize_type(arg.typ),
"name":
arg.name,
"unit":
print_unit(unit_from_type(arg.typ), custom_units_descriptions)
} for arg in self.args],
"constant":
self.const,
"payable":
self.payable,
"type":
"constructor" if self.name == "__init__" else "function"
}
for abi_input in abi_dict['inputs']:
delete_unit_if_empty(abi_input)
return abi_dict
def _generate_base_type(self, arg_type, name=None, custom_units_descriptions=None):
yield "type", canonicalize_type(arg_type)
u = unit_from_type(arg_type)
if u:
yield "unit", print_unit(u, custom_units_descriptions)
name = "out" if not name else name
yield "name", name
def to_abi_dict(self):
return {
"name": self.name,
"inputs": [{"type": canonicalize_type(arg.typ, self.indexed_list[pos]), "name": arg.name, "indexed": self.indexed_list[pos]} for pos, arg in enumerate(self.args)] if self.args else [],
"anonymous": False,
"type": "event"
}
def to_abi_event_dict(self, arg, pos, custom_units_descriptions):
yield "type", canonicalize_type(arg.typ, self.indexed_list[pos]),
yield "name", arg.name,
yield "indexed", self.indexed_list[pos],
u = unit_from_type(arg.typ)
if u:
yield "unit", print_unit(u, custom_units_descriptions)
def from_declaration(cls, code, custom_units=None):
name = code.target.id
pos = 0
if not is_varname_valid(name, custom_units=custom_units):
raise EventDeclarationException("Event name invalid: " + name)
# Determine the arguments, expects something of the form def foo(arg1: num, arg2: num ...
args = []
indexed_list = []
topics_count = 1
if code.annotation.args:
keys = code.annotation.args[0].keys
values = code.annotation.args[0].values
for i in range(len(keys)):
typ = values[i]
arg = keys[i].id
is_indexed = False
# Check to see if argument is a topic
if isinstance(typ, ast.Call) and typ.func.id == 'indexed':
typ = values[i].args[0]
indexed_list.append(True)
topics_count += 1
is_indexed = True
else:
indexed_list.append(False)
if isinstance(typ, ast.Subscript) and getattr(
typ.value, 'id', None
) == 'bytes' and typ.slice.value.n > 32 and is_indexed:
raise EventDeclarationException(
"Indexed arguments are limited to 32 bytes")
if topics_count > 4:
raise EventDeclarationException(
"Maximum of 3 topics {} given".format(topics_count -
1), arg)
if not isinstance(arg, str):
raise VariableDeclarationException("Argument name invalid",
arg)
if not typ:
raise InvalidTypeException("Argument must have type", arg)
if not is_varname_valid(arg, custom_units):
raise VariableDeclarationException(
"Argument name invalid or reserved: " + arg, arg)
if arg in (x.name for x in args):
raise VariableDeclarationException(
"Duplicate function argument name: " + arg, arg)
parsed_type = parse_type(typ, None, custom_units=custom_units)
args.append(VariableRecord(arg, pos, parsed_type, False))
if isinstance(parsed_type, ByteArrayType):
pos += ceil32(typ.slice.value.n)
else:
pos += get_size_of_type(parsed_type) * 32
sig = name + '(' + ','.join([
canonicalize_type(arg.typ, indexed_list[pos])
for pos, arg in enumerate(args)
]) + ')' # noqa F812
event_id = bytes_to_int(sha3(bytes(sig, 'utf-8')))
return cls(name, args, indexed_list, event_id, sig)
def to_abi_dict(self):
return {
"name": self.name,
"outputs": self._generate_output_abi(),
"inputs": [{"type": canonicalize_type(arg.typ), "name": arg.name} for arg in self.args],
"constant": self.const,
"payable": self.payable,
"type": "constructor" if self.name == "__init__" else "function"
}
def from_declaration(cls, class_node, global_ctx):
name = class_node.name
pos = 0
check_valid_varname(
name,
global_ctx._structs,
global_ctx._constants,
pos=class_node,
error_prefix="Event name invalid. ",
exc=EventDeclarationException,
)
args = []
indexed_list = []
if len(class_node.body) != 1 or not isinstance(class_node.body[0],
vy_ast.Pass):
for node in class_node.body:
arg_item = node.target
arg = node.target.id
typ = node.annotation
if isinstance(typ,
vy_ast.Call) and typ.get("func.id") == "indexed":
indexed_list.append(True)
typ = typ.args[0]
else:
indexed_list.append(False)
check_valid_varname(
arg,
global_ctx._structs,
global_ctx._constants,
pos=arg_item,
error_prefix="Event argument name invalid or reserved.",
)
if arg in (x.name for x in args):
raise TypeCheckFailure(
f"Duplicate function argument name: {arg}")
# Can struct be logged?
parsed_type = global_ctx.parse_type(typ, None)
args.append(VariableRecord(arg, pos, parsed_type, False))
if isinstance(parsed_type, ByteArrayType):
pos += ceil32(typ.slice.value.n)
else:
pos += get_size_of_type(parsed_type) * 32
sig = (name + "(" + ",".join([
canonicalize_type(arg.typ, indexed_list[pos])
for pos, arg in enumerate(args)
]) + ")") # noqa F812
event_id = bytes_to_int(keccak256(bytes(sig, "utf-8")))
return cls(name, args, indexed_list, event_id, sig)
def to_abi_dict(self, custom_units_descriptions=None):
abi_dict = {
"name": self.name,
"inputs": [{
"type": canonicalize_type(arg.typ, self.indexed_list[pos]),
"name": arg.name,
"indexed": self.indexed_list[pos],
"unit": print_unit(unit_from_type(arg.typ), custom_units_descriptions)
} for pos, arg in enumerate(self.args)] if self.args else [],
"anonymous": False,
"type": "event"
}
for abi_input in abi_dict['inputs']:
delete_unit_if_empty(abi_input)
return abi_dict
def from_definition(
cls,
code,
sigs=None,
custom_structs=None,
interface_def=False,
constant_override=False,
is_from_json=False,
):
if not custom_structs:
custom_structs = {}
name = code.name
mem_pos = 0
# Determine the arguments, expects something of the form def foo(arg1:
# int128, arg2: int128 ...
args = []
for arg in code.args.args:
# Each arg needs a type specified.
typ = arg.annotation
parsed_type = parse_type(
typ,
None,
sigs,
custom_structs=custom_structs,
)
args.append(
VariableRecord(
arg.arg,
mem_pos,
parsed_type,
False,
defined_at=getpos(arg),
))
if isinstance(parsed_type, ByteArrayLike):
mem_pos += 32
else:
mem_pos += get_size_of_type(parsed_type) * 32
mutability = "nonpayable" # Assume nonpayable by default
nonreentrant_key = ""
is_internal = False
# Update function properties from decorators
# NOTE: Can't import enums here because of circular import
for dec in code.decorator_list:
if isinstance(dec, vy_ast.Name) and dec.id in ("payable", "view",
"pure"):
mutability = dec.id
elif isinstance(dec, vy_ast.Name) and dec.id == "internal":
is_internal = True
elif isinstance(dec, vy_ast.Name) and dec.id == "external":
is_internal = False
elif isinstance(dec,
vy_ast.Call) and dec.func.id == "nonreentrant":
nonreentrant_key = dec.args[0].s
if constant_override:
# In case this override is abused, match previous behavior
if mutability == "payable":
raise StructureException(
f"Function {name} cannot be both constant and payable.")
mutability = "view"
# Determine the return type and whether or not it's constant. Expects something
# of the form:
# def foo(): ...
# def foo() -> int128: ...
# If there is no return type, ie. it's of the form def foo(): ...
# and NOT def foo() -> type: ..., then it's null
output_type = None
if code.returns:
output_type = parse_type(
code.returns,
None,
sigs,
custom_structs=custom_structs,
)
# Output type must be canonicalizable
assert isinstance(output_type,
TupleType) or canonicalize_type(output_type)
# Get the canonical function signature
sig = cls.get_full_sig(name, code.args.args, sigs, custom_structs)
# Take the first 4 bytes of the hash of the sig to get the method ID
method_id = fourbytes_to_int(keccak256(bytes(sig, "utf-8"))[:4])
return cls(
name,
args,
output_type,
mutability,
is_internal,
nonreentrant_key,
sig,
method_id,
code,
is_from_json,
)
def to_abi_event_dict(self, arg, pos):
yield "type", canonicalize_type(arg.typ, self.indexed_list[pos]),
yield "name", arg.name,
yield "indexed", self.indexed_list[pos],
def from_definition(cls,
code,
sigs=None,
custom_units=None,
contract_def=False,
constant=False):
name = code.name
pos = 0
if not is_varname_valid(name, custom_units=custom_units):
raise FunctionDeclarationException("Function name invalid: " +
name)
# Determine the arguments, expects something of the form def foo(arg1: int128, arg2: int128 ...
args = []
for arg in code.args.args:
typ = arg.annotation
if not typ:
raise InvalidTypeException("Argument must have type", arg)
if not is_varname_valid(arg.arg, custom_units=custom_units):
raise FunctionDeclarationException(
"Argument name invalid or reserved: " + arg.arg, arg)
if arg.arg in (x.name for x in args):
raise FunctionDeclarationException(
"Duplicate function argument name: " + arg.arg, arg)
parsed_type = parse_type(typ,
None,
sigs,
custom_units=custom_units)
args.append(VariableRecord(arg.arg, pos, parsed_type, False))
if isinstance(parsed_type, ByteArrayType):
pos += 32
else:
pos += get_size_of_type(parsed_type) * 32
# Apply decorators
const, payable, private, public = False, False, False, False
for dec in code.decorator_list:
if isinstance(dec, ast.Name) and dec.id == "constant":
const = True
elif isinstance(dec, ast.Name) and dec.id == "payable":
payable = True
elif isinstance(dec, ast.Name) and dec.id == "private":
private = True
elif isinstance(dec, ast.Name) and dec.id == "public":
public = True
else:
raise StructureException("Bad decorator", dec)
if public and private:
raise StructureException(
"Cannot use public and private decorators on the same function: {}"
.format(name))
if payable and const:
raise StructureException(
"Function {} cannot be both constant and payable.".format(
name))
if payable and private:
raise StructureException(
"Function {} cannot be both private and payable.".format(name))
if (not public and not private) and not contract_def:
raise StructureException(
"Function visibility must be declared (@public or @private)",
code)
if constant:
const = True
# Determine the return type and whether or not it's constant. Expects something
# of the form:
# def foo(): ...
# def foo() -> int128: ...
# If there is no return type, ie. it's of the form def foo(): ...
# and NOT def foo() -> type: ..., then it's null
if not code.returns:
output_type = None
elif isinstance(
code.returns,
(ast.Name, ast.Compare, ast.Subscript, ast.Call, ast.Tuple)):
output_type = parse_type(code.returns,
None,
sigs,
custom_units=custom_units)
else:
raise InvalidTypeException(
"Output type invalid or unsupported: %r" %
parse_type(code.returns, None),
code.returns,
)
# Output type must be canonicalizable
if output_type is not None:
assert isinstance(output_type,
TupleType) or canonicalize_type(output_type)
# Get the canonical function signature
sig = cls.get_full_sig(name, code.args.args, sigs, custom_units)
# Take the first 4 bytes of the hash of the sig to get the method ID
method_id = fourbytes_to_int(sha3(bytes(sig, 'utf-8'))[:4])
return cls(name, args, output_type, const, payable, private, sig,
method_id, custom_units)
def from_definition(cls,
code,
sigs=None,
custom_units=None,
custom_structs=None,
contract_def=False,
constants=None,
constant=False):
if not custom_structs:
custom_structs = {}
name = code.name
mem_pos = 0
valid_name, msg = is_varname_valid(name, custom_units, custom_structs,
constants)
if not valid_name and (not name.lower() in function_whitelist):
raise FunctionDeclarationException("Function name invalid. " + msg,
code)
# Validate default values.
for default_value in getattr(code.args, 'defaults', []):
allowed_types = (ast.Num, ast.Str, ast.Bytes, ast.List,
ast.NameConstant)
if not isinstance(default_value, allowed_types):
raise FunctionDeclarationException(
"Default parameter values have to be literals.")
# Determine the arguments, expects something of the form def foo(arg1:
# int128, arg2: int128 ...
args = []
for arg in code.args.args:
# Each arg needs a type specified.
typ = arg.annotation
if not typ:
raise InvalidTypeException("Argument must have type", arg)
# Validate arg name.
check_valid_varname(
arg.arg,
custom_units,
custom_structs,
constants,
arg,
"Argument name invalid or reserved. ",
FunctionDeclarationException,
)
# Check for duplicate arg name.
if arg.arg in (x.name for x in args):
raise FunctionDeclarationException(
"Duplicate function argument name: " + arg.arg,
arg,
)
parsed_type = parse_type(
typ,
None,
sigs,
custom_units=custom_units,
custom_structs=custom_structs,
constants=constants,
)
args.append(
VariableRecord(
arg.arg,
mem_pos,
parsed_type,
False,
defined_at=getpos(arg),
))
if isinstance(parsed_type, ByteArrayLike):
mem_pos += 32
else:
mem_pos += get_size_of_type(parsed_type) * 32
# Apply decorators
const, payable, private, public, nonreentrant_key = False, False, False, False, ''
for dec in code.decorator_list:
if isinstance(dec, ast.Name) and dec.id == "constant":
const = True
elif isinstance(dec, ast.Name) and dec.id == "payable":
payable = True
elif isinstance(dec, ast.Name) and dec.id == "private":
private = True
elif isinstance(dec, ast.Name) and dec.id == "public":
public = True
elif isinstance(dec, ast.Call) and dec.func.id == "nonreentrant":
if dec.args and len(dec.args) == 1 and isinstance(
dec.args[0], ast.Str) and dec.args[0].s: # noqa: E501
nonreentrant_key = dec.args[0].s
else:
raise StructureException(
"@nonreentrant decorator requires a non-empty string to use as a key.",
dec)
else:
raise StructureException("Bad decorator", dec)
if public and private:
raise StructureException(
"Cannot use public and private decorators on the same function: {}"
.format(name))
if payable and const:
raise StructureException(
"Function {} cannot be both constant and payable.".format(
name))
if payable and private:
raise StructureException(
"Function {} cannot be both private and payable.".format(name))
if (not public and not private) and not contract_def:
raise StructureException(
"Function visibility must be declared (@public or @private)",
code,
)
if constant and nonreentrant_key:
raise StructureException(
"@nonreentrant makes no sense on a @constant function.", code)
if constant:
const = True
# Determine the return type and whether or not it's constant. Expects something
# of the form:
# def foo(): ...
# def foo() -> int128: ...
# If there is no return type, ie. it's of the form def foo(): ...
# and NOT def foo() -> type: ..., then it's null
if not code.returns:
output_type = None
elif isinstance(
code.returns,
(ast.Name, ast.Compare, ast.Subscript, ast.Call, ast.Tuple)):
output_type = parse_type(
code.returns,
None,
sigs,
custom_units=custom_units,
custom_structs=custom_structs,
constants=constants,
)
else:
raise InvalidTypeException(
"Output type invalid or unsupported: %r" %
parse_type(code.returns, None),
code.returns,
)
# Output type must be canonicalizable
if output_type is not None:
assert isinstance(output_type,
TupleType) or canonicalize_type(output_type)
# Get the canonical function signature
sig = cls.get_full_sig(name, code.args.args, sigs, custom_units,
custom_structs, constants)
# Take the first 4 bytes of the hash of the sig to get the method ID
method_id = fourbytes_to_int(keccak256(bytes(sig, 'utf-8'))[:4])
return cls(name, args, output_type, const, payable, private,
nonreentrant_key, sig, method_id, custom_units, code)
def from_declaration(cls, code, global_ctx):
name = code.target.id
pos = 0
check_valid_varname(name,
global_ctx._custom_units,
global_ctx._structs,
global_ctx._constants,
pos=code,
error_prefix="Event name invalid. ",
exc=EventDeclarationException)
# Determine the arguments, expects something of the form def foo(arg1: num, arg2: num ...
args = []
indexed_list = []
topics_count = 1
if code.annotation.args:
keys = code.annotation.args[0].keys
values = code.annotation.args[0].values
for i in range(len(keys)):
typ = values[i]
if not isinstance(keys[i], ast.Name):
raise EventDeclarationException(
'Invalid key type, expected a valid name.',
keys[i],
)
if not isinstance(typ, (ast.Name, ast.Call, ast.Subscript)):
raise EventDeclarationException(
'Invalid event argument type.', typ)
if isinstance(typ,
ast.Call) and not isinstance(typ.func, ast.Name):
raise EventDeclarationException(
'Invalid event argument type', typ)
arg = keys[i].id
arg_item = keys[i]
is_indexed = False
# Check to see if argument is a topic
if isinstance(typ, ast.Call) and typ.func.id == 'indexed':
typ = values[i].args[0]
indexed_list.append(True)
topics_count += 1
is_indexed = True
else:
indexed_list.append(False)
if isinstance(typ, ast.Subscript) and getattr(
typ.value, 'id', None
) == 'bytes' and typ.slice.value.n > 32 and is_indexed: # noqa: E501
raise EventDeclarationException(
"Indexed arguments are limited to 32 bytes")
if topics_count > 4:
raise EventDeclarationException(
f"Maximum of 3 topics {topics_count - 1} given",
arg,
)
if not isinstance(arg, str):
raise VariableDeclarationException("Argument name invalid",
arg)
if not typ:
raise InvalidTypeException("Argument must have type", arg)
check_valid_varname(
arg,
global_ctx._custom_units,
global_ctx._structs,
global_ctx._constants,
pos=arg_item,
error_prefix="Event argument name invalid or reserved.",
)
if arg in (x.name for x in args):
raise VariableDeclarationException(
"Duplicate function argument name: " + arg,
arg_item,
)
# Can struct be logged?
parsed_type = global_ctx.parse_type(typ, None)
args.append(VariableRecord(arg, pos, parsed_type, False))
if isinstance(parsed_type, ByteArrayType):
pos += ceil32(typ.slice.value.n)
else:
pos += get_size_of_type(parsed_type) * 32
sig = name + '(' + ','.join([
canonicalize_type(arg.typ, indexed_list[pos])
for pos, arg in enumerate(args)
]) + ')' # noqa F812
event_id = bytes_to_int(keccak256(bytes(sig, 'utf-8')))
return cls(name, args, indexed_list, event_id, sig)
def from_definition(
cls,
code,
sigs=None,
custom_structs=None,
interface_def=False,
constants=None,
constant_override=False,
is_from_json=False,
):
if not custom_structs:
custom_structs = {}
name = code.name
mem_pos = 0
valid_name, msg = is_varname_valid(name, custom_structs, constants)
if not valid_name and (not name.lower() in FUNCTION_WHITELIST):
raise FunctionDeclarationException("Function name invalid. " + msg, code)
# Validate default values.
for default_value in getattr(code.args, "defaults", []):
validate_default_values(default_value)
# Determine the arguments, expects something of the form def foo(arg1:
# int128, arg2: int128 ...
args = []
for arg in code.args.args:
# Each arg needs a type specified.
typ = arg.annotation
if not typ:
raise InvalidType("Argument must have type", arg)
# Validate arg name.
check_valid_varname(
arg.arg,
custom_structs,
constants,
arg,
"Argument name invalid or reserved. ",
FunctionDeclarationException,
)
# Check for duplicate arg name.
if arg.arg in (x.name for x in args):
raise FunctionDeclarationException(
"Duplicate function argument name: " + arg.arg, arg,
)
parsed_type = parse_type(
typ, None, sigs, custom_structs=custom_structs, constants=constants,
)
args.append(
VariableRecord(arg.arg, mem_pos, parsed_type, False, defined_at=getpos(arg),)
)
if isinstance(parsed_type, ByteArrayLike):
mem_pos += 32
else:
mem_pos += get_size_of_type(parsed_type) * 32
mutability = "nonpayable" # Assume nonpayable by default
internal = False
external = False
nonreentrant_key = ""
# Update function properties from decorators
# NOTE: Can't import enums here because of circular import
for dec in code.decorator_list:
if isinstance(dec, vy_ast.Name) and dec.id in ("payable", "view", "pure"):
mutability = dec.id
elif isinstance(dec, vy_ast.Name) and dec.id == "internal":
internal = True
elif isinstance(dec, vy_ast.Name) and dec.id == "external":
external = True
elif isinstance(dec, vy_ast.Call) and dec.func.id == "nonreentrant":
if nonreentrant_key:
raise StructureException(
"Only one @nonreentrant decorator allowed per function", dec
)
if (
dec.args
and len(dec.args) == 1
and isinstance(dec.args[0], vy_ast.Str)
and dec.args[0].s
): # noqa: E501
nonreentrant_key = dec.args[0].s
else:
raise StructureException(
"@nonreentrant decorator requires a non-empty string to use as a key.", dec
)
else:
raise StructureException("Bad decorator", dec)
if constant_override:
# In case this override is abused, match previous behavior
if mutability == "payable":
raise StructureException(f"Function {name} cannot be both constant and payable.")
mutability = "view"
if external and internal:
raise StructureException(
f"Cannot use external and internal decorators on the same function: {name}"
)
if mutability == "payable" and internal:
raise StructureException(f"Function {name} cannot be both internal and payable.")
if (not external and not internal) and not interface_def:
raise StructureException(
"Function visibility must be declared (@external or @internal)", code,
)
if mutability in ("view", "pure") and nonreentrant_key:
raise StructureException(
f"@nonreentrant makes no sense on a @{mutability} function.", code
)
# Determine the return type and whether or not it's constant. Expects something
# of the form:
# def foo(): ...
# def foo() -> int128: ...
# If there is no return type, ie. it's of the form def foo(): ...
# and NOT def foo() -> type: ..., then it's null
if not code.returns:
output_type = None
elif isinstance(
code.returns, (vy_ast.Name, vy_ast.Compare, vy_ast.Subscript, vy_ast.Call, vy_ast.Tuple)
):
output_type = parse_type(
code.returns, None, sigs, custom_structs=custom_structs, constants=constants,
)
else:
raise InvalidType(
f"Output type invalid or unsupported: {parse_type(code.returns, None)}",
code.returns,
)
# Output type must be canonicalizable
if output_type is not None:
assert isinstance(output_type, TupleType) or canonicalize_type(output_type)
# Get the canonical function signature
sig = cls.get_full_sig(name, code.args.args, sigs, custom_structs, constants)
# Take the first 4 bytes of the hash of the sig to get the method ID
method_id = fourbytes_to_int(keccak256(bytes(sig, "utf-8"))[:4])
return cls(
name,
args,
output_type,
mutability,
internal,
nonreentrant_key,
sig,
method_id,
code,
is_from_json,
)
def _generate_base_type(self, arg_type, name=""):
yield "type", canonicalize_type(arg_type)
yield "name", name
