add struct defs to file scope

slither/vyper_parsing/declarations/contract.py

@@ -453,6 +453,8 @@ class ContractVyper:
             st_parser = StructVyper(st, struct)
             self._contract.structures_as_dict[st.name] = st
             self._structures_parser.append(st_parser)
+            # Interfaces can refer to struct defs
+            self._contract.file_scope.structures[st.name] = st
 
         self._structuresNotParsed = []
 

slither/vyper_parsing/type_parsing.py

@@ -96,4 +96,7 @@ def parse_type(
 
     if name in contract.file_scope.contracts:
         return UserDefinedType(contract.file_scope.contracts[name])
+
+    if name in contract.file_scope.structures:
+        return UserDefinedType(contract.file_scope.structures[name])
     assert False

tests/e2e/vyper_parsing/snapshots/ast_parsing__vyper_cfgir_interface_constant_slitherConstructorConstantVariables__0.txt

@@ -2,8 +2,8 @@ digraph{
 0[label="Node Type: OTHER_ENTRYPOINT 0
 
 EXPRESSION:
-MAX_TICKS_UINT = 50
+MY_CONSTANT = 50
 
 IRs:
-MAX_TICKS_UINT(uint256) := 50(uint256)"];
+MY_CONSTANT(uint256) := 50(uint256)"];
 }

tests/e2e/vyper_parsing/test_data/interface_constant.vy

@@ -1,12 +1,7 @@
-interface LMGauge:
-    def callback_collateral_shares(n: int256, collateral_per_share: DynArray[uint256, MAX_TICKS_UINT]): nonpayable
-    def callback_user_shares(user: address, n: int256, user_shares: DynArray[uint256, MAX_TICKS_UINT]): nonpayable
+struct MyStruct:
+    liquidation_range: address
+MY_CONSTANT: constant(uint256) =  50
+interface MyInterface:
+    def my_func(a: int256, b: DynArray[uint256, MY_CONSTANT]) -> MyStruct: nonpayable
 
 
-MAX_TICKS_UINT: constant(uint256) =  50
-
-
-struct Loan:
-    liquidation_range: LMGauge
-
-x: public(Loan)