Converting to Long from bytes (Uint8Array) and BigInt

Working with Data Drivers
1

While testing conversion (Node.js driver) from/to Long and Uint8Array/BinInt I have noticed that there may be a discrepancy between the actual representation and the effect of Long.fromBytesBE.

BigUint64Array represents its bytes as Big-Endian, meanwhile converting from the binary representation to Long one must use fromBytesLE rather than fromBytesBE as you would expect.

Here is a snippet of code:

const test = () => {
  const value1 = BigInt(2);
  const value2 = new Uint8Array(new BigUint64Array([value1]).buffer);

  const fromBigInt = Long.fromBigInt(value1);
  const fromBytesBE = Long.fromBytesBE(value2);
  const fromBytesLE = Long.fromBytesLE(value2);

  console.log({
    value1,
    value2,
    fromBigInt,
    fromBytesBE,
    fromBytesLE
  });
};

test();

/*
OUTPUT:

{
  value1: 2n,
  value2: Uint8Array(8) [2, 0, 0, 0, 0, 0, 0, 0],
  fromBigInt: new Long("2"),
  fromBytesBE: new Long("144115188075855872"),
  fromBytesLE: new Long("2")
}
*/

Am I doing this wrong?

Kind regards,
Alexandru Comanescu