export function uint8ArrayToBase64(uint8Array: Uint8Array): string {
  const len = uint8Array.byteLength;
  const result: string[] = [];
  for (let i = 0; i < len; i++) {
    result.push(String.fromCharCode(uint8Array[i]));
  }
  return result.join('');
}


export function base64ToUint8Array(base64: string): Uint8Array {
  const len = base64.length;
  const uint8Array = new Uint8Array(len);
  for (let i = 0; i < len; i++) {
    uint8Array[i] = base64.charCodeAt(i);
  }
  return uint8Array;
}