separate thems into separate files

src/seqta/utils/blobToBase64.ts

@@ -0,0 +1,11 @@
+export const blobToBase64 = (blob: Blob) => {
+  return new Promise<string>((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => {
+      const base64 = reader.result as string;
+      resolve(base64);
+    };
+    reader.onerror = reject;
+    reader.readAsDataURL(blob);
+  });
+};