minor

slither/core/cfg/scope.py

@@ -5,10 +5,10 @@ if TYPE_CHECKING:
     from slither.core.declarations.function import Function
 
 
+# pylint: disable=too-few-public-methods
 class Scope:
-
-    def __init__(self, is_checked:bool, is_yul: bool, scope: Union["Scope", "Function"]):
-        self.nodes: List[Node] = []
+    def __init__(self, is_checked: bool, is_yul: bool, scope: Union["Scope", "Function"]):
+        self.nodes: List["Node"] = []
         self.is_checked = is_checked
         self.is_yul = is_yul
-        self.father = scope
+        self.father = scope

slither/core/declarations/contract.py

@@ -1115,12 +1115,16 @@ class Contract(SourceMapping):  # pylint: disable=too-many-public-methods
                     constructor_variable.set_offset(self.source_mapping, self.compilation_unit)
                     self._functions[constructor_variable.canonical_name] = constructor_variable
 
-                    prev_node = self._create_node(constructor_variable, 0, variable_candidate, constructor_variable)
+                    prev_node = self._create_node(
+                        constructor_variable, 0, variable_candidate, constructor_variable
+                    )
                     variable_candidate.node_initialization = prev_node
                     counter = 1
                     for v in self.state_variables[idx + 1 :]:
                         if v.expression and not v.is_constant:
-                            next_node = self._create_node(constructor_variable, counter, v, prev_node.scope)
+                            next_node = self._create_node(
+                                constructor_variable, counter, v, prev_node.scope
+                            )
                             v.node_initialization = next_node
                             prev_node.add_son(next_node)
                             next_node.add_father(prev_node)
@@ -1143,12 +1147,16 @@ class Contract(SourceMapping):  # pylint: disable=too-many-public-methods
                     constructor_variable.set_offset(self.source_mapping, self.compilation_unit)
                     self._functions[constructor_variable.canonical_name] = constructor_variable
 
-                    prev_node = self._create_node(constructor_variable, 0, variable_candidate, constructor_variable)
+                    prev_node = self._create_node(
+                        constructor_variable, 0, variable_candidate, constructor_variable
+                    )
                     variable_candidate.node_initialization = prev_node
                     counter = 1
                     for v in self.state_variables[idx + 1 :]:
                         if v.expression and v.is_constant:
-                            next_node = self._create_node(constructor_variable, counter, v, prev_node.scope)
+                            next_node = self._create_node(
+                                constructor_variable, counter, v, prev_node.scope
+                            )
                             v.node_initialization = next_node
                             prev_node.add_son(next_node)
                             next_node.add_father(prev_node)
@@ -1157,7 +1165,9 @@ class Contract(SourceMapping):  # pylint: disable=too-many-public-methods
 
                     break
 
-    def _create_node(self, func: Function, counter: int, variable: "Variable", scope: Union[Scope, Function]):
+    def _create_node(
+        self, func: Function, counter: int, variable: "Variable", scope: Union[Scope, Function]
+    ):
         from slither.core.cfg.node import Node, NodeType
         from slither.core.expressions import (
             AssignmentOperationType,

slither/core/declarations/function.py

@@ -1531,7 +1531,9 @@ class Function(metaclass=ABCMeta):  # pylint: disable=too-many-public-methods
     ###################################################################################
     ###################################################################################
 
-    def new_node(self, node_type: "NodeType", src: Union[str, Dict], scope: Union[Scope, "Function"]) -> "Node":
+    def new_node(
+        self, node_type: "NodeType", src: Union[str, Dict], scope: Union[Scope, "Function"]
+    ) -> "Node":
         from slither.core.cfg.node import Node
 
         node = Node(node_type, self._counter_nodes, scope)

slither/slithir/operations/binary.py

@@ -131,7 +131,7 @@ class BinaryType(Enum):
 
 
 class Binary(OperationWithLValue):
-    def __init__(self, result, left_variable, right_variable, operation_type: BinaryType, is_checked: bool=False):
+    def __init__(self, result, left_variable, right_variable, operation_type: BinaryType):
         assert is_valid_rvalue(left_variable) or isinstance(left_variable, Function)
         assert is_valid_rvalue(right_variable) or isinstance(right_variable, Function)
         assert is_valid_lvalue(result)
@@ -144,7 +144,6 @@ class Binary(OperationWithLValue):
             result.set_type(ElementaryType("bool"))
         else:
             result.set_type(left_variable.type)
-        self.is_checked = is_checked
 
     @property
     def read(self):

slither/solc_parsing/declarations/function.py

@@ -329,13 +329,17 @@ class FunctionSolc:
     ###################################################################################
     ###################################################################################
 
-    def _new_node(self, node_type: NodeType, src: Union[str, Dict], scope: Union[Scope, "Function"]) -> NodeSolc:
+    def _new_node(
+        self, node_type: NodeType, src: Union[str, Dict], scope: Union[Scope, "Function"]
+    ) -> NodeSolc:
         node = self._function.new_node(node_type, src, scope)
         node_parser = NodeSolc(node)
         self._node_to_nodesolc[node] = node_parser
         return node_parser
 
-    def _new_yul_block(self, src: Union[str, Dict], father_scope: Union[Scope, Function]) -> YulBlock:
+    def _new_yul_block(
+        self, src: Union[str, Dict], father_scope: Union[Scope, Function]
+    ) -> YulBlock:
         scope = Scope(False, True, father_scope)
         node = self._function.new_node(NodeType.ASSEMBLY, src, scope)
         contract = None
@@ -366,26 +370,42 @@ class FunctionSolc:
             condition = if_statement["condition"]
             # Note: check if the expression could be directly
             # parsed here
-            condition_node = self._new_node(NodeType.IF, condition["src"], node.underlying_node.scope)
+            condition_node = self._new_node(
+                NodeType.IF, condition["src"], node.underlying_node.scope
+            )
             condition_node.add_unparsed_expression(condition)
             link_underlying_nodes(node, condition_node)
-            true_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
-            trueStatement = self._parse_statement(if_statement["trueBody"], condition_node, true_scope)
+            true_scope = Scope(
+                node.underlying_node.scope.is_checked, False, node.underlying_node.scope
+            )
+            trueStatement = self._parse_statement(
+                if_statement["trueBody"], condition_node, true_scope
+            )
             if "falseBody" in if_statement and if_statement["falseBody"]:
-                false_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
-                falseStatement = self._parse_statement(if_statement["falseBody"], condition_node, false_scope)
+                false_scope = Scope(
+                    node.underlying_node.scope.is_checked, False, node.underlying_node.scope
+                )
+                falseStatement = self._parse_statement(
+                    if_statement["falseBody"], condition_node, false_scope
+                )
         else:
             children = if_statement[self.get_children("children")]
             condition = children[0]
             # Note: check if the expression could be directly
             # parsed here
-            condition_node = self._new_node(NodeType.IF, condition["src"], node.underlying_node.scope)
+            condition_node = self._new_node(
+                NodeType.IF, condition["src"], node.underlying_node.scope
+            )
             condition_node.add_unparsed_expression(condition)
             link_underlying_nodes(node, condition_node)
-            true_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
+            true_scope = Scope(
+                node.underlying_node.scope.is_checked, False, node.underlying_node.scope
+            )
             trueStatement = self._parse_statement(children[1], condition_node, true_scope)
             if len(children) == 3:
-                false_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
+                false_scope = Scope(
+                    node.underlying_node.scope.is_checked, False, node.underlying_node.scope
+                )
                 falseStatement = self._parse_statement(children[2], condition_node, false_scope)
 
         endIf_node = self._new_node(NodeType.ENDIF, if_statement["src"], node.underlying_node.scope)
@@ -400,21 +420,29 @@ class FunctionSolc:
     def _parse_while(self, whilte_statement: Dict, node: NodeSolc) -> NodeSolc:
         # WhileStatement = 'while' '(' Expression ')' Statement
 
-        node_startWhile = self._new_node(NodeType.STARTLOOP, whilte_statement["src"], node.underlying_node.scope)
+        node_startWhile = self._new_node(
+            NodeType.STARTLOOP, whilte_statement["src"], node.underlying_node.scope
+        )
 
         body_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
         if self.is_compact_ast:
-            node_condition = self._new_node(NodeType.IFLOOP, whilte_statement["condition"]["src"], node.underlying_node.scope)
+            node_condition = self._new_node(
+                NodeType.IFLOOP, whilte_statement["condition"]["src"], node.underlying_node.scope
+            )
             node_condition.add_unparsed_expression(whilte_statement["condition"])
             statement = self._parse_statement(whilte_statement["body"], node_condition, body_scope)
         else:
             children = whilte_statement[self.get_children("children")]
             expression = children[0]
-            node_condition = self._new_node(NodeType.IFLOOP, expression["src"], node.underlying_node.scope)
+            node_condition = self._new_node(
+                NodeType.IFLOOP, expression["src"], node.underlying_node.scope
+            )
             node_condition.add_unparsed_expression(expression)
             statement = self._parse_statement(children[1], node_condition, body_scope)
 
-        node_endWhile = self._new_node(NodeType.ENDLOOP, whilte_statement["src"], node.underlying_node.scope)
+        node_endWhile = self._new_node(
+            NodeType.ENDLOOP, whilte_statement["src"], node.underlying_node.scope
+        )
 
         link_underlying_nodes(node, node_startWhile)
         link_underlying_nodes(node_startWhile, node_condition)
@@ -550,8 +578,12 @@ class FunctionSolc:
         else:
             pre, cond, post, body = self._parse_for_legacy_ast(statement)
 
-        node_startLoop = self._new_node(NodeType.STARTLOOP, statement["src"], node.underlying_node.scope)
-        node_endLoop = self._new_node(NodeType.ENDLOOP, statement["src"], node.underlying_node.scope)
+        node_startLoop = self._new_node(
+            NodeType.STARTLOOP, statement["src"], node.underlying_node.scope
+        )
+        node_endLoop = self._new_node(
+            NodeType.ENDLOOP, statement["src"], node.underlying_node.scope
+        )
 
         last_scope = node.underlying_node.scope
 
@@ -597,13 +629,21 @@ class FunctionSolc:
 
     def _parse_dowhile(self, do_while_statement: Dict, node: NodeSolc) -> NodeSolc:
 
-        node_startDoWhile = self._new_node(NodeType.STARTLOOP, do_while_statement["src"], node.underlying_node.scope)
-        condition_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
+        node_startDoWhile = self._new_node(
+            NodeType.STARTLOOP, do_while_statement["src"], node.underlying_node.scope
+        )
+        condition_scope = Scope(
+            node.underlying_node.scope.is_checked, False, node.underlying_node.scope
+        )
 
         if self.is_compact_ast:
-            node_condition = self._new_node(NodeType.IFLOOP, do_while_statement["condition"]["src"], condition_scope)
+            node_condition = self._new_node(
+                NodeType.IFLOOP, do_while_statement["condition"]["src"], condition_scope
+            )
             node_condition.add_unparsed_expression(do_while_statement["condition"])
-            statement = self._parse_statement(do_while_statement["body"], node_condition, condition_scope)
+            statement = self._parse_statement(
+                do_while_statement["body"], node_condition, condition_scope
+            )
         else:
             children = do_while_statement[self.get_children("children")]
             # same order in the AST as while
@@ -633,7 +673,9 @@ class FunctionSolc:
 
         if externalCall is None:
             raise ParsingError("Try/Catch not correctly parsed by Slither %s" % statement)
-        catch_scope = Scope(node.underlying_node.scope.is_checked, False, node.underlying_node.scope)
+        catch_scope = Scope(
+            node.underlying_node.scope.is_checked, False, node.underlying_node.scope
+        )
         new_node = self._new_node(NodeType.TRY, statement["src"], catch_scope)
         new_node.add_unparsed_expression(externalCall)
         link_underlying_nodes(node, new_node)
@@ -675,7 +717,9 @@ class FunctionSolc:
             self._add_local_variable(local_var_parser)
             # local_var.analyze(self)
 
-            new_node = self._new_node(NodeType.VARIABLE, statement["src"], node.underlying_node.scope)
+            new_node = self._new_node(
+                NodeType.VARIABLE, statement["src"], node.underlying_node.scope
+            )
             new_node.underlying_node.add_variable_declaration(local_var)
             link_underlying_nodes(node, new_node)
             return new_node
@@ -758,7 +802,9 @@ class FunctionSolc:
                         "typeDescriptions": {"typeString": "tuple()"},
                     }
                     node = new_node
-                    new_node = self._new_node(NodeType.EXPRESSION, statement["src"], node.underlying_node.scope)
+                    new_node = self._new_node(
+                        NodeType.EXPRESSION, statement["src"], node.underlying_node.scope
+                    )
                     new_node.add_unparsed_expression(expression)
                     link_underlying_nodes(node, new_node)
 
@@ -838,7 +884,9 @@ class FunctionSolc:
                         ],
                     }
                     node = new_node
-                    new_node = self._new_node(NodeType.EXPRESSION, statement["src"], node.underlying_node.scope)
+                    new_node = self._new_node(
+                        NodeType.EXPRESSION, statement["src"], node.underlying_node.scope
+                    )
                     new_node.add_unparsed_expression(expression)
                     link_underlying_nodes(node, new_node)
 
@@ -860,7 +908,9 @@ class FunctionSolc:
         link_underlying_nodes(node, new_node)
         return new_node
 
-    def _parse_statement(self, statement: Dict, node: NodeSolc, scope: Union[Scope, Function]) -> NodeSolc:
+    def _parse_statement(
+        self, statement: Dict, node: NodeSolc, scope: Union[Scope, Function]
+    ) -> NodeSolc:
         """
 
         Return:
@@ -1146,7 +1196,9 @@ class FunctionSolc:
 
         for m in ExportValues(m).result():
             if isinstance(m, Function):
-                node_parser = self._new_node(NodeType.EXPRESSION, modifier["src"], self.underlying_function)
+                node_parser = self._new_node(
+                    NodeType.EXPRESSION, modifier["src"], self.underlying_function
+                )
                 node_parser.add_unparsed_expression(modifier)
                 # The latest entry point is the entry point, or the latest modifier call
                 if self._function.modifiers:
@@ -1163,7 +1215,9 @@ class FunctionSolc:
                 )
 
             elif isinstance(m, Contract):
-                node_parser = self._new_node(NodeType.EXPRESSION, modifier["src"], self.underlying_function)
+                node_parser = self._new_node(
+                    NodeType.EXPRESSION, modifier["src"], self.underlying_function
+                )
                 node_parser.add_unparsed_expression(modifier)
                 # The latest entry point is the entry point, or the latest constructor call
                 if self._function.explicit_base_constructor_calls_statements:

slither/solc_parsing/declarations/modifier.py

@@ -93,7 +93,9 @@ class ModifierSolc(FunctionSolc):
         # self._analyze_read_write()
         # self._analyze_calls()
 
-    def _parse_statement(self, statement: Dict, node: NodeSolc, scope: Union[Scope, "Function"]) -> NodeSolc:
+    def _parse_statement(
+        self, statement: Dict, node: NodeSolc, scope: Union[Scope, "Function"]
+    ) -> NodeSolc:
         name = statement[self.get_key()]
         if name == "PlaceholderStatement":
             placeholder_node = self._new_node(NodeType.PLACEHOLDER, statement["src"], scope)

slither/solc_parsing/yul/parse_yul.py

@@ -200,7 +200,9 @@ class YulLocalVariable:  # pylint: disable=too-few-public-methods
 class YulFunction(YulScope):
     __slots__ = ["_function", "_root", "_ast", "_nodes", "_entrypoint", "node_scope"]
 
-    def __init__(self, func: Function, root: YulScope, ast: Dict, node_scope: Union[Function, Scope]):
+    def __init__(
+        self, func: Function, root: YulScope, ast: Dict, node_scope: Union[Function, Scope]
+    ):
         super().__init__(root.contract, root.id + [ast["name"]], parent_func=root.parent_func)
 
         assert ast["nodeType"] == "YulFunctionDefinition"
@@ -277,7 +279,14 @@ class YulBlock(YulScope):
 
     __slots__ = ["_entrypoint", "_parent_func", "_nodes", "node_scope"]
 
-    def __init__(self, contract: Optional[Contract], entrypoint: Node, yul_id: List[str], node_scope: Union[Scope, Function], **kwargs):
+    def __init__(
+        self,
+        contract: Optional[Contract],
+        entrypoint: Node,
+        yul_id: List[str],
+        node_scope: Union[Scope, Function],
+        **kwargs,
+    ):
         super().__init__(contract, yul_id, **kwargs)
 
         self._entrypoint: YulNode = YulNode(entrypoint, self)
@@ -333,15 +342,19 @@ class YulBlock(YulScope):
 # dispatches to a specialized function based on a lookup dictionary.
 
 
-def convert_yul_block(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_block(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     for statement in ast["statements"]:
         parent = convert_yul(root, parent, statement, node_scope)
     return parent
 
 
-def convert_yul_function_definition(root: YulScope, parent: YulNode, ast: Dict) -> YulNode:
+def convert_yul_function_definition(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     func = FunctionContract(root.compilation_unit)
-    yul_function = YulFunction(func, root, ast)
+    yul_function = YulFunction(func, root, ast, node_scope)
 
     root.contract.add_function(func)
     root.compilation_unit.add_function(func)
@@ -353,7 +366,9 @@ def convert_yul_function_definition(root: YulScope, parent: YulNode, ast: Dict)
     return parent
 
 
-def convert_yul_variable_declaration(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_variable_declaration(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     for variable_ast in ast["variables"]:
         parent = convert_yul(root, parent, variable_ast, node_scope)
 
@@ -364,14 +379,18 @@ def convert_yul_variable_declaration(root: YulScope, parent: YulNode, ast: Dict,
     return node
 
 
-def convert_yul_assignment(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_assignment(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     node = root.new_node(NodeType.EXPRESSION, ast["src"])
     node.add_unparsed_expression(ast)
     link_underlying_nodes(parent, node)
     return node
 
 
-def convert_yul_expression_statement(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_expression_statement(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     src = ast["src"]
     expression_ast = ast["expression"]
 
@@ -382,7 +401,9 @@ def convert_yul_expression_statement(root: YulScope, parent: YulNode, ast: Dict,
     return expression
 
 
-def convert_yul_if(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_if(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     # we're cheating and pretending that yul supports if/else so we can convert switch cleaner
 
     src = ast["src"]
@@ -409,7 +430,9 @@ def convert_yul_if(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union
     return end
 
 
-def convert_yul_switch(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_switch(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     """
     This is unfortunate. We don't really want a switch in our IR so we're going to
     translate it into a series of if/else statements.
@@ -493,7 +516,9 @@ def convert_yul_switch(root: YulScope, parent: YulNode, ast: Dict, node_scope: U
     return convert_yul(root, parent, rewritten_switch, node_scope)
 
 
-def convert_yul_for_loop(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_for_loop(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     pre_ast = ast["pre"]
     condition_ast = ast["condition"]
     post_ast = ast["post"]
@@ -521,25 +546,33 @@ def convert_yul_for_loop(root: YulScope, parent: YulNode, ast: Dict, node_scope:
     return end_loop
 
 
-def convert_yul_break(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_break(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     break_ = root.new_node(NodeType.BREAK, ast["src"])
     link_underlying_nodes(parent, break_)
     return break_
 
 
-def convert_yul_continue(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_continue(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     continue_ = root.new_node(NodeType.CONTINUE, ast["src"])
     link_underlying_nodes(parent, continue_)
     return continue_
 
 
-def convert_yul_leave(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_leave(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     leave = root.new_node(NodeType.RETURN, ast["src"])
     link_underlying_nodes(parent, leave)
     return leave
 
 
-def convert_yul_typed_name(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_typed_name(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     local_var = LocalVariable()
 
     var = YulLocalVariable(local_var, root, ast)
@@ -552,13 +585,17 @@ def convert_yul_typed_name(root: YulScope, parent: YulNode, ast: Dict, _node_sco
     return node
 
 
-def convert_yul_unsupported(root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul_unsupported(
+    root: YulScope, parent: YulNode, ast: Dict, _node_scope: Union[Function, Scope]
+) -> YulNode:
     raise SlitherException(
         f"no converter available for {ast['nodeType']} {json.dumps(ast, indent=2)}"
     )
 
 
-def convert_yul(root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]) -> YulNode:
+def convert_yul(
+    root: YulScope, parent: YulNode, ast: Dict, node_scope: Union[Function, Scope]
+) -> YulNode:
     return converters.get(ast["nodeType"], convert_yul_unsupported)(root, parent, ast, node_scope)