wallet-core: preparations for materialzed txnsdev/dold/materialized-transactions

1 files changed, 23 insertions, 6 deletions

diff --git a/packages/taler-wallet-core/src/common.ts b/packages/taler-wallet-core/src/common.ts
index 5acdeeba4..eb06b8eb0 100644
--- a/packages/taler-wallet-core/src/common.ts
+++ b/packages/taler-wallet-core/src/common.ts
@@ -61,11 +61,7 @@ import {
   timestampPreciseToDb,
 } from "./db.js";
 import { createRefreshGroup } from "./refresh.js";
-import {
-  InternalWalletState,
-  WalletExecutionContext,
-  getDenomInfo,
-} from "./wallet.js";
+import { WalletExecutionContext, getDenomInfo } from "./wallet.js";
 
 const logger = new Logger("operations/common.ts");
 
@@ -696,11 +692,32 @@ export namespace TaskIdentifiers {
 /**
  * Result of a transaction transition.
  */
-export enum TransitionResult {
+export enum TransitionResultType {
   Transition = 1,
   Stay = 2,
+  Delete = 3,
 }
 
+export type TransitionResult<R> =
+  | { type: TransitionResultType.Stay }
+  | { type: TransitionResultType.Transition; rec: R }
+  | { type: TransitionResultType.Delete };
+
+export const TransitionResult = {
+  stay<T>(): TransitionResult<T> {
+    return { type: TransitionResultType.Stay };
+  },
+  delete<T>(): TransitionResult<T> {
+    return { type: TransitionResultType.Delete };
+  },
+  transition<T>(rec: T): TransitionResult<T> {
+    return {
+      type: TransitionResultType.Transition,
+      rec,
+    };
+  },
+};
+
 /**
  * Transaction context.
  * Uniform interface to all transactions.