How to use the bytebuffer.fromBase64 function in bytebuffer

export function convertToRawPrivKey(internalPrivKey: InternalPrivKey): string {
  return ByteBuffer.fromBase64(internalPrivKey.value).toString('hex');
}
// convert internal pub key to raw pub key

export function convertToRawPubKey(internalPubKey: InternalPubKey): string {
  return ByteBuffer.fromBase64(internalPubKey.value).toString('hex');
}
// convert internal sig to raw sig

var setTimestamp = function(timestamp, update_clock) {
  if (timestamp && timestamp.data && timestamp.data !== 'null') {
    timestamp = bytebuffer.fromBase64(timestamp.data);
    console.log(timestamp);
    atdClient.monotonicSnapshots = true;
    atdClient.setLastCommitTimestamp(timestamp);
    atdClient.update_clock = update_clock;
  }
};

function convertToRawPubKey(internalPubKey) {
    return ByteBuffer.fromBase64(internalPubKey.value).toString('hex');
}
function sortObject(object) {

export function convertToRawSig(internalSignature: InternalSignature): string {
  return ByteBuffer.fromBase64(internalSignature.value).toString('hex');
}