make resolveWith required

integration-test/langfuse-integration-fetch.spec.ts

@@ -672,6 +672,7 @@ describe("Langfuse (fetch)", () => {
 
     const mediaReplacedTrace = await langfuse.resolveMediaReferences({
       obj: res.data,
+      resolveWith: "base64DataUri",
     });
 
     // Check that the replaced base64 data is the same as the original

langfuse-core/src/index.ts

@@ -1556,7 +1556,7 @@ export abstract class LangfuseCore extends LangfuseCoreStateless {
    * @param params - Configuration object
    * @param params.obj - The object to process. Can be a primitive value, array, or nested object
    * @param params.langfuseClient - Langfuse client instance used to fetch media content
-   * @param params.resolveWith - Optional. Default is "base64DataUri". The type of data to replace the media reference string with. Currently only "base64DataUri" is supported.
+   * @param params.resolveWith - The representation of the media content to replace the media reference string with. Currently only "base64DataUri" is supported.
    * @param params.maxDepth - Optional. Default is 10. The maximum depth to traverse the object.
    *
    * @returns A deep copy of the input object with all media references replaced with base64 data URIs where possible

langfuse-core/src/media/LangfuseMedia.ts

@@ -33,7 +33,7 @@ interface ParsedMediaReference {
 export type LangfuseMediaResolveMediaReferencesParams<T> = {
   obj: T;
   langfuseClient: LangfuseCore;
-  resolveWith?: "base64DataUri";
+  resolveWith: "base64DataUri";
   maxDepth?: number;
 };
 
@@ -216,7 +216,7 @@ class LangfuseMedia {
    * @param params - Configuration object
    * @param params.obj - The object to process. Can be a primitive value, array, or nested object
    * @param params.langfuseClient - Langfuse client instance used to fetch media content
-   * @param params.resolveWith - Optional. Default is "base64DataUri". The type of data to replace the media reference string with. Currently only "base64DataUri" is supported.
+   * @param params.resolveWith - The representation of the media content to replace the media reference string with. Currently only "base64DataUri" is supported.
    * @param params.maxDepth - Optional. Default is 10. The maximum depth to traverse the object.
    *
    * @returns A deep copy of the input object with all media references replaced with base64 data URIs where possible

langfuse-core/test/langfuse.flush.spec.ts

@@ -41,6 +41,7 @@ describe("Langfuse Core", () => {
           status: 400,
           text: async () => "err",
           json: async () => ({ status: "err" }),
+          arrayBuffer: async () => new Uint8Array(),
         });
       });
 
@@ -59,6 +60,7 @@ describe("Langfuse Core", () => {
           status: 207,
           text: async () => "err",
           json: async () => ({ successes: [], errors: [{ id: trace.id, message: "Something failed" }] }),
+          arrayBuffer: async () => new Uint8Array(),
         });
       });
 
@@ -90,13 +92,15 @@ describe("Langfuse Core", () => {
             status: 207,
             text: async () => "err",
             json: async () => ({ successes: [], errors: [{ id: "someId", message: "Something failed" }] }),
+            arrayBuffer: async () => new Uint8Array(),
           });
         } else {
           index++;
           return Promise.resolve({
             status: 200,
             text: async () => "ok",
             json: async () => ({ successes: [], errors: [] }),
+            arrayBuffer: async () => new Uint8Array(),
           });
         }
       });
@@ -168,6 +172,7 @@ describe("Langfuse Core", () => {
                   status: 200,
                   text: async () => "ok",
                   json: async () => ({ status: "ok" }),
+                  arrayBuffer: async () => new Uint8Array(),
                 });
               }, 500); // add delay to simulate network request
             });

langfuse-core/test/langfuse.prompts.spec.ts

@@ -191,6 +191,7 @@ describe("Langfuse Core", () => {
               status: 200,
               json: async () => ({ status: "200" }),
               text: async () => "ok",
+              arrayBuffer: async () => new Uint8Array(),
             });
           }, 1000);
         });

langfuse-node/src/fetch.ts

@@ -18,5 +18,6 @@ export const fetch = async (url: string, options: LangfuseFetchOptions): Promise
     status: res.status,
     text: async () => res.data,
     json: async () => res.data,
+    arrayBuffer: async () => res.data,
   };
 };