1 files changed, 30 insertions, 1 deletions
diff --git a/packages/taler-util/src/http-client/exchange.ts b/packages/taler-util/src/http-client/exchange.ts
index ea7f44cf9..68d68267f 100644
--- a/packages/taler-util/src/http-client/exchange.ts
+++ b/packages/taler-util/src/http-client/exchange.ts
@@ -33,7 +33,7 @@ import {
   codecForExchangeConfig,
   codecForExchangeKeys,
 } from "./types.js";
-import { addPaginationParams } from "./utils.js";
+import { CacheEvictor, addPaginationParams, nullEvictor } from "./utils.js";
 
 export type TalerExchangeResultByMethod<
   prop extends keyof TalerExchangeHttpClient,
@@ -42,17 +42,25 @@ export type TalerExchangeErrorsByMethod<
   prop extends keyof TalerExchangeHttpClient,
 > = FailCasesByMethod<TalerExchangeHttpClient, prop>;
 
+export enum TalerExchangeCacheEviction {
+  CREATE_DESCISION,
+}
+
+
 /**
  */
 export class TalerExchangeHttpClient {
   httpLib: HttpRequestLibrary;
   public readonly PROTOCOL_VERSION = "18:0:1";
+  cacheEvictor: CacheEvictor<TalerExchangeCacheEviction>;
 
   constructor(
     readonly baseUrl: string,
     httpClient?: HttpRequestLibrary,
+    cacheEvictor?: CacheEvictor<TalerExchangeCacheEviction>,
   ) {
     this.httpLib = httpClient ?? createPlatformHttpLib();
+    this.cacheEvictor = cacheEvictor ?? nullEvictor;
   }
 
   isCompatible(version: string): boolean {
@@ -60,6 +68,27 @@ export class TalerExchangeHttpClient {
     return compare?.compatible ?? false;
   }
   /**
+   * https://docs.taler.net/core/api-exchange.html#get--seed
+   *
+   */
+  async getSeed() {
+    const url = new URL(`seed`, this.baseUrl);
+    const resp = await this.httpLib.fetch(url.href, {
+      method: "GET",
+    });
+    switch (resp.status) {
+      case HttpStatusCode.Ok:
+        const buffer = await resp.bytes();
+        const uintar = new Uint8Array(buffer);
+
+        return opFixedSuccess(uintar);
+      case HttpStatusCode.NotFound:
+        return opKnownHttpFailure(resp.status, resp);
+      default:
+        return opUnknownFailure(resp, await readTalerErrorResponse(resp));
+    }
+  }
+  /**
    * https://docs.taler.net/core/api-exchange.html#get--config
    *
    */