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Getting Started with Wasm

Install the library:

npm install @iota/client-wasm
// or using yarn
yarn add @iota/client-wasm

Build

Alternatively, you can build the bindings if you have Rust installed. If not, refer to rustup.rs for the installation. Then install the necessary dependencies using:

npm install

and then build the bindings for node.js with

npm run build:nodejs

or for the web with

npm run build:web

NodeJS Setup

const iota = require('@iota/client-wasm/node')

async function main() {
// Get the nodeinfo
let iota_client = await iota.Client.withNode("https://api.lb-0.h.chrysalis-devnet.iota.cafe/");
console.log("Nodeinfo: ", await iota_client.getInfo())
}
main()

Web Setup

The library loads the WASM file with an HTTP GET request, so the .wasm file must be copied to the root of the dist folder.

Rollup

  • Install rollup-plugin-copy:
npm install rollup-plugin-copy --save-dev
// or using yarn
yarn add rollup-plugin-copy --dev
  • Add the copy plugin usage to the plugins array under rollup.config.js:
// Include the copy plugin
import copy from 'rollup-plugin-copy'

// Add the copy plugin to the `plugins` array of your rollup config:
copy({
targets: [{
src: 'node_modules/@iota/client-wasm/web/client_wasm_bg.wasm',
dest: 'public',
rename: 'client_wasm_bg.wasm'
}]
})

Webpack

  • Install copy-webpack-plugin:
npm install copy-webpack-plugin --save-dev
// or using yarn
yarn add copy-webpack-plugin --dev
// Include the copy plugin
const CopyWebPlugin= require('copy-webpack-plugin');

// Add the copy plugin to the `plugins` array of your webpack config:

new CopyWebPlugin({
patterns: [
{
from: 'node_modules/@iota/client-wasm/web/client_wasm_bg.wasm',
to: 'client_wasm_bg.wasm'
}
]
}),

Usage

import * as iota from "@iota/client-wasm/web";

iota.init().then(() => {
async function main() {
// Get the nodeinfo
let iota_client = await iota.Client.withNode("https://api.lb-0.h.chrysalis-devnet.iota.cafe/");
console.log("Nodeinfo: ", await iota_client.getInfo())
}
main()
});

// or

(async () => {
await iota.init()
// Get the nodeinfo
let iota_client = await iota.Client.withNode("https://api.lb-0.h.chrysalis-devnet.iota.cafe/");
console.log("Nodeinfo: ", await iota_client.getInfo())
})()

// Default path is "client_wasm_bg.wasm", but you can override it like this
await iota.init("./static/client_wasm_bg.wasm");

iota.init().then(<callback>) or await iota.init() is required to load the wasm file (from the server if not available, because of that it will only be slow for the first time)