Functions

Functions work as you would expect in TypeScript. For example:

function addOneAndDouble(x: Field): Field {
    return x.add(1).mul(2);
}

Here we take the input x, add 1 to the Field value, multiply it by two and return the new Field.

Try it out

Let’s first call the addOneAndDouble function with our defined Field x and call the result y:

const y = addOneAndDouble(x);

Now check if our y field is equal to the value of 4:

const isEqual = y.equals(4);

Log the variables y and isEqual:

Provable.log("y is:", y);
Provable.log("y is equal to 4:", isEqual);

Now build and run the script in the terminal:

npm run build && node build/src/index.js

This will log the following:

y is: 4
y is equal to 4: true