refactor: dedupe openai data url helper

extensions/openai/image-generation-provider.ts

@@ -7,6 +7,7 @@ import {
   resolveProviderHttpRequestConfig,
 } from "openclaw/plugin-sdk/provider-http";
 import { OPENAI_DEFAULT_IMAGE_MODEL as DEFAULT_OPENAI_IMAGE_MODEL } from "./default-models.js";
+import { toOpenAIDataUrl } from "./shared.js";
 
 const DEFAULT_OPENAI_IMAGE_BASE_URL = "https://api.openai.com/v1";
 const DEFAULT_OUTPUT_MIME = "image/png";
@@ -26,10 +27,6 @@ function resolveOpenAIBaseUrl(cfg: Parameters<typeof resolveApiKeyForProvider>[0
   return direct || DEFAULT_OPENAI_IMAGE_BASE_URL;
 }
 
-function toDataUrl(buffer: Buffer, mimeType: string): string {
-  return `data:${mimeType};base64,${buffer.toString("base64")}`;
-}
-
 export function buildOpenAIImageGenerationProvider(): ImageGenerationProvider {
   return {
     id: "openai",
@@ -100,7 +97,10 @@ export function buildOpenAIImageGenerationProvider(): ImageGenerationProvider {
                 n: count,
                 size,
                 images: inputImages.map((image) => ({
-                  image_url: toDataUrl(image.buffer, image.mimeType?.trim() || DEFAULT_OUTPUT_MIME),
+                  image_url: toOpenAIDataUrl(
+                    image.buffer,
+                    image.mimeType?.trim() || DEFAULT_OUTPUT_MIME,
+                  ),
                 })),
               },
               timeoutMs: req.timeoutMs,

extensions/openai/shared.ts

@@ -6,6 +6,10 @@ import {
 
 export const OPENAI_API_BASE_URL = "https://api.openai.com/v1";
 
+export function toOpenAIDataUrl(buffer: Buffer, mimeType: string): string {
+  return `data:${mimeType};base64,${buffer.toString("base64")}`;
+}
+
 export function isOpenAIApiBaseUrl(baseUrl?: string): boolean {
   const trimmed = baseUrl?.trim();
   if (!trimmed) {

extensions/openai/video-generation-provider.ts

@@ -11,6 +11,7 @@ import type {
   VideoGenerationProvider,
   VideoGenerationRequest,
 } from "openclaw/plugin-sdk/video-generation";
+import { toOpenAIDataUrl } from "./shared.js";
 
 const DEFAULT_OPENAI_VIDEO_BASE_URL = "https://api.openai.com/v1";
 const DEFAULT_OPENAI_VIDEO_MODEL = "sora-2";
@@ -46,10 +47,6 @@ function toBlobBytes(buffer: Buffer): ArrayBuffer {
   return arrayBuffer;
 }
 
-function toDataUrl(buffer: Buffer, mimeType: string): string {
-  return `data:${mimeType};base64,${buffer.toString("base64")}`;
-}
-
 function resolveDurationSeconds(durationSeconds: number | undefined): "4" | "8" | "12" | undefined {
   if (typeof durationSeconds !== "number" || !Number.isFinite(durationSeconds)) {
     return undefined;
@@ -265,7 +262,7 @@ export function buildOpenAIVideoGenerationProvider(): VideoGenerationProvider {
                   ...(seconds ? { seconds } : {}),
                   ...(size ? { size } : {}),
                   input_reference: {
-                    image_url: toDataUrl(
+                    image_url: toOpenAIDataUrl(
                       inputImage.buffer,
                       inputImage.mimeType?.trim() || "image/png",
                     ),