Add wasm bindings for `Hash`
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@ -1,7 +1,7 @@
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//! The `hash` module provides functions for creating SHA-256 hashes.
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use {
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crate::sanitize::Sanitize,
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crate::{sanitize::Sanitize, wasm_bindgen},
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borsh::{BorshDeserialize, BorshSchema, BorshSerialize},
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sha2::{Digest, Sha256},
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std::{convert::TryFrom, fmt, mem, str::FromStr},
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@ -11,6 +11,8 @@ use {
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pub const HASH_BYTES: usize = 32;
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/// Maximum string length of a base58 encoded hash
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const MAX_BASE58_LEN: usize = 44;
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#[wasm_bindgen]
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#[derive(
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Serialize,
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Deserialize,
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@ -0,0 +1,57 @@
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//! `Hash` Javascript interface
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#![cfg(target_arch = "wasm32")]
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#![allow(non_snake_case)]
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use {
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crate::{hash::*, wasm::display_to_jsvalue},
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js_sys::{Array, Uint8Array},
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wasm_bindgen::{prelude::*, JsCast},
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};
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#[wasm_bindgen]
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impl Hash {
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/// Create a new Hash object
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///
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/// * `value` - optional hash as a base58 encoded string, `Uint8Array`, `[number]`
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#[wasm_bindgen(constructor)]
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pub fn constructor(value: JsValue) -> Result<Hash, JsValue> {
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if let Some(base58_str) = value.as_string() {
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base58_str.parse::<Hash>().map_err(display_to_jsvalue)
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} else if let Some(uint8_array) = value.dyn_ref::<Uint8Array>() {
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Ok(Hash::new(&uint8_array.to_vec()))
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} else if let Some(array) = value.dyn_ref::<Array>() {
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let mut bytes = vec![];
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let iterator = js_sys::try_iter(&array.values())?.expect("array to be iterable");
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for x in iterator {
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let x = x?;
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if let Some(n) = x.as_f64() {
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if n >= 0. && n <= 255. {
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bytes.push(n as u8);
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continue;
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}
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}
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return Err(format!("Invalid array argument: {:?}", x).into());
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}
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Ok(Hash::new(&bytes))
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} else if value.is_undefined() {
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Ok(Hash::default())
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} else {
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Err("Unsupported argument".into())
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}
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}
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/// Return the base58 string representation of the hash
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pub fn toString(&self) -> String {
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self.to_string()
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}
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/// Checks if two `Hash`s are equal
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pub fn equals(&self, other: &Hash) -> bool {
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self == other
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}
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/// Return the `Uint8Array` representation of the hash
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pub fn toBytes(&self) -> Box<[u8]> {
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self.0.clone().into()
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}
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}
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@ -2,13 +2,19 @@
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#![cfg(target_arch = "wasm32")]
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use wasm_bindgen::prelude::*;
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pub mod hash;
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pub mod pubkey;
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/// Initialize Javascript logging and panic handler
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#[wasm_bindgen]
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pub fn init() {
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std::panic::set_hook(Box::new(console_error_panic_hook::hook));
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console_log::init_with_level(log::Level::Info).unwrap();
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use std::sync::Once;
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static INIT: Once = Once::new();
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INIT.call_once(|| {
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std::panic::set_hook(Box::new(console_error_panic_hook::hook));
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console_log::init_with_level(log::Level::Info).unwrap();
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});
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}
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pub fn display_to_jsvalue<T: std::fmt::Display>(display: T) -> JsValue {
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@ -0,0 +1,81 @@
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import { expect } from "chai";
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import { init, Hash } from "crate";
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init();
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// TODO: wasm_bindgen doesn't currently support exporting constants
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const HASH_BYTES = 32;
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describe("Hash", function () {
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it("invalid", () => {
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expect(() => {
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new Hash([
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3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0,
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]);
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}).to.throw();
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expect(() => {
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new Hash([
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'invalid', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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]);
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}).to.throw();
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expect(() => {
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new Hash(
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"0x300000000000000000000000000000000000000000000000000000000000000000000"
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);
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}).to.throw();
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expect(() => {
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new Hash(
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"0x300000000000000000000000000000000000000000000000000000000000000"
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);
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}).to.throw();
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expect(() => {
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new Hash(
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"135693854574979916511997248057056142015550763280047535983739356259273198796800000"
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);
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}).to.throw();
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expect(() => {
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new Hash("12345");
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}).to.throw();
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});
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it("toString", () => {
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const key = new Hash("CiDwVBFgWV9E5MvXWoLgnEgn2hK7rJikbvfWavzAQz3");
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expect(key.toString()).to.eq("CiDwVBFgWV9E5MvXWoLgnEgn2hK7rJikbvfWavzAQz3");
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const key2 = new Hash("1111111111111111111111111111BukQL");
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expect(key2.toString()).to.eq("1111111111111111111111111111BukQL");
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const key3 = new Hash("11111111111111111111111111111111");
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expect(key3.toString()).to.eq("11111111111111111111111111111111");
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const key4 = new Hash([
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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]);
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expect(key4.toString()).to.eq("11111111111111111111111111111111");
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});
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it("toBytes", () => {
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const key = new Hash("CiDwVBFgWV9E5MvXWoLgnEgn2hK7rJikbvfWavzAQz3");
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expect(key.toBytes()).to.deep.equal(
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new Uint8Array([
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3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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])
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);
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const key2 = new Hash();
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expect(key2.toBytes()).to.deep.equal(
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new Uint8Array([
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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])
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);
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});
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});
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