Hello World written in Motoko and compiled into WebAssembly

Code generated by executing dfx new hello; it demonstrates how to compile Motoko sources into WebAssembly to be served via Node.js.

Prerequisites

This project requires version 0.8.4 of the DFINITY Canister SDK being installed. To verify, run dfx --version.

Get the Sources

$ git clone https://github.com/tglaeser/hello.git
$ cd ./hello

Displays the Project Structure

$ tree -L 4 .
.
├── LICENSE
├── README.md
├── dfx.json
├── package-lock.json
├── package.json
├── src
│   ├── hello
│   │   └── main.mo
│   └── hello_assets
│       ├── assets
│       │   ├── favicon.ico
│       │   ├── logo.png
│       │   ├── main.css
│       │   └── sample-asset.txt
│       └── src
│           ├── index.html
│           └── index.js
└── webpack.config.js

Install Web Application Dependencies

$ npm install

Start a Local Internet Computer

$ dfx start

Create, Build, and Install Canister

$ dfx canister create --all
$ dfx build
$ dfx canister install --all

Call the greet Function from the Terminal

$ dfx canister call hello greet "World"

Call the greet Function from a Browser

Open a browser and navigate to the address and port your local IC is listening to: http://<host>:<port>/?canisterId=<hello_assets_cid>. See value networks.local.bind in file dfx.json for the <host>:<port> binding, you can also execute dfx config to see the configuration. The <hello_assets_cid> value was printed to the console when previously installing the canister.

Further Reading

• SDK documentation - For the SDK, the Candid Specification, and the Motoko language.
• WebAssembly home page - For the WASM binary instruction format.