bn.rs

bn.js bindings for Rust & WebAssembly

Write Rust code that uses BN ```rust use bnrs::BN; use wasmbindgen::prelude::*;

[wasm_bindgen]

pub fn sum(a: BN, b: BN) -> Result { /// BNError implements Into<JsValue>, so we can use ? here let a = u128::tryfrom(a)?; let b: u128 = b.tryinto()?;

let result = a + b;

Ok(result.into())

} ```

Call it from JavaScript ```javascript import {sum} from './pkg' import BN from 'bn.js'

const a = new BN(2, 10) const b = new BN(2, 10)

console.log(sum(a, b)) // Call Rust code with BN passed and returned ```

Run example

shell $ cd example $ yarn $ yarn start