update to the new bank api breaking changes

1 files changed, 22 insertions, 1 deletions

diff --git a/packages/taler-util/src/operation.ts b/packages/taler-util/src/operation.ts
index 8adbbb0e2..9d7594d14 100644
--- a/packages/taler-util/src/operation.ts
+++ b/packages/taler-util/src/operation.ts
@@ -67,8 +67,29 @@ export async function failOrThrow<E>(s: E, cb: () => Promise<OperationResult<unk
 
 export type ResultByMethod<TT extends object, p extends keyof TT> = TT[p] extends (...args: any[]) => infer Ret ?
   Ret extends Promise<infer Result> ?
-  Result :
+  Result extends OperationResult<any, any> ? Result : never :
   never : //api always use Promises
   never; //error cases just for functions
 
 export type FailCasesByMethod<TT extends object, p extends keyof TT> = Exclude<ResultByMethod<TT, p>, OperationOk<any>>
+
+type MethodsOfOperations<T extends object> = keyof {
+  [P in keyof T as
+  //when the property is a function
+  T[P] extends (...args: any[]) => infer Ret ?
+  // that returns a promise
+  Ret extends Promise<infer Result> ?
+  // of an operation
+  Result extends OperationResult<any, any> ?
+  P : never
+  : never
+  : never]: any
+}
+
+type AllKnownCases<t extends object, d extends keyof t> = "success" | FailCasesByMethod<t, d>["case"]
+
+export type TestForApi<ApiType extends object> = {
+  [OpType in MethodsOfOperations<ApiType> as `test_${OpType & string}`]: {
+    [c in AllKnownCases<ApiType, OpType>]: undefined | ((api: ApiType) => Promise<void>);
+  };
+};