[How To] Arduino attachInterrupt

I have an arduino sketch that I would like to port JavaScript and run on a pico.
The sketch is reading input from pins 2 and 3 and then attaching two interrupts to get 0/1 bits.

What would be the way to achieve this using a pico?

The following is an excerpt of the sketch I'm using, I could post the whole script but I figured this encompasses the core of my question.

void ISR_INT0()
{
    bitCount++;
    flagDone = 0;
    pulseCounter = WAIT_TIME;

}

void ISR_INT1()
{
    databits[bitCount] = 1;
    bitCount++;
    flagDone = 0;
    pulseCounter = WAIT_TIME;
}

void setup()
{
    pinMode(13, OUTPUT);   // LED
    pinMode(2, INPUT);     // DATA0 (INT0)
    pinMode(3, INPUT);     // DATA1 (INT1)

    Serial.begin(115200);
    Bridge.begin();

    while (!Serial);

    attachInterrupt(1, ISR_INT0, RISING);
    attachInterrupt(0, ISR_INT1, RISING);

    pulseCounter = WAIT_TIME;
}

void loop()
{
    if (!flagDone)
    {
        if (--pulseCounter == 0)
        {
            flagDone = 1;
        }
    }

    // if we have bits and we the pulse counter went out
    if (bitCount > 0 && flagDone)
    {
        //... logic removed
        bitCount = 0;
    }
}