fix(core): Fix binary data helpers (like prepareBinaryData) with task runner (#12259)

packages/core/src/SerializedBuffer.ts

@@ -0,0 +1,24 @@
+/** A nodejs Buffer gone through JSON.stringify */
+export type SerializedBuffer = {
+	type: 'Buffer';
+	data: number[]; // Array like Uint8Array, each item is uint8 (0-255)
+};
+
+/** Converts the given SerializedBuffer to nodejs Buffer */
+export function toBuffer(serializedBuffer: SerializedBuffer): Buffer {
+	return Buffer.from(serializedBuffer.data);
+}
+
+function isObjectLiteral(item: unknown): item is { [key: string]: unknown } {
+	return typeof item === 'object' && item !== null && !Array.isArray(item);
+}
+
+export function isSerializedBuffer(candidate: unknown): candidate is SerializedBuffer {
+	return (
+		isObjectLiteral(candidate) &&
+		'type' in candidate &&
+		'data' in candidate &&
+		candidate.type === 'Buffer' &&
+		Array.isArray(candidate.data)
+	);
+}

packages/core/src/index.ts

@@ -24,3 +24,4 @@ export * from './ExecutionMetadata';
 export * from './node-execution-context';
 export * from './PartialExecutionUtils';
 export { ErrorReporter } from './error-reporter';
+export * from './SerializedBuffer';