@roochnetwork/rooch-sdk/src/utils/b64.ts

Rooch SDK

// Copyright (c) RoochNetwork
// SPDX-License-Identifier: Apache-2.0

export function fromB64(base64String: string): Uint8Array {
  return Uint8Array.from(atob(base64String), (char) => char.charCodeAt(0))
}

const CHUNK_SIZE = 8192
export function toB64(bytes: Uint8Array): string {
  // Special-case the simple case for speed's sake.
  if (bytes.length < CHUNK_SIZE) {
    return btoa(String.fromCharCode(...bytes))
  }

  let output = ''
  for (let i = 0; i < bytes.length; i += CHUNK_SIZE) {
    const chunk = bytes.slice(i, i + CHUNK_SIZE)
    output += String.fromCharCode(...chunk)
  }

  return btoa(output)
}