From 6b9b4ba7cc1576e7cc91e2b30e9d5e75edbe0037 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Wed, 13 Mar 2024 21:07:46 +0100
Subject: wallet-core: preparations for materialzed txns

---
 packages/taler-wallet-core/src/common.ts | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

(limited to 'packages/taler-wallet-core/src/common.ts')

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.
-- 
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