Rhai Functions for Fluence

Rhai is an embedded scripting language for Rust (https://github.com/jonathandturner/rhai). Rhai Functions for Fluence allows you to execute Rhai functions and statements. The function can be defined in one call and it's results can be fetched from another call.

Screenshots

App URL

http://rhai-functions.surge.sh/ (Fluence App 402)

Examples

Assignment

let x = 58;
x

{"result":58}

Array

let x = [1, 2, 3]; 
x[1]

{"result":2}

Function

fn addme(a, b) { 
  a + b 
}
addme(3, 4)

{"result":7}

if else

let a = true;
let x = 0;
if(a){
 x = 50;
}
else{
 x = 100;
}
x

{"result":50}

String

"hello " + "world!"

{"result":"hello world!"}

Predefined Function

factorial(5)

{"result":120}

Getting Started

1. Clone Repo

   git clone https://github.com/viraja1/rhai_functions_fluence.git
   

2. Change directory

   cd rhai_functions_fluence
   

3. Install Rust and Cargo

4. Generate wasm build

   cargo +nightly build --lib --target wasm32-unknown-unknown --release
   

   rhai_functions_fluence.wasm will be generated in target/wasm32-unknown-unknown/release

5. Deploy generated wasm file on Fluence

   Deploy rhai_functions_fluence.wasm on Fluence and note down the App config shown in the bottom right part of the App console (contract, appId, ethereumUrl)

   http://dash.fluence.network/deploy
   

6. Update Fluence app config

   Update Fluence app config in client/src/components/config.js

   vi client/src/components/config.js
   

7. Build client app

   cd client
   npm install
   

8. Start client app

   npm start
   

9. Open client app url in chrome

   http://localhost:8080
   

10. Test the App