async function streamToBuffer2(stream, buffer, encoding) {
    let pos = 0; // Position in stream
    const bufferSize = buffer.length;
    return new Promise((resolve, reject) => {
        stream.on("readable", () => {
            let chunk = stream.read();
            if (!chunk) {
                return;
            }
            if (typeof chunk === "string") {
                chunk = Buffer.from(chunk, encoding);
            }
            if (pos + chunk.length > bufferSize) {
                reject(new Error(`Stream exceeds buffer size. Buffer size: ${bufferSize}`));
                return;
            }
            buffer.fill(chunk, pos, pos + chunk.length);
            pos += chunk.length;
        });
        stream.on("end", () => {
            resolve(pos);
        });
        stream.on("error", reject);
    });
}
Reads a readable stream into buffer entirely.

@param stream - A Node.js Readable stream
@param buffer - Buffer to be filled, length must greater than or equal to offset
@param encoding - Encoding of the Readable stream
@returns with the count of bytes read.
@throws `RangeError` If buffer size is not big enough.