simple-whisper

Web3 Whisper made simple.

(A demo will be released when metamask upgrades to Web3 1.0)

install

npm install simple-whisper
#or 
yarn add simple-whisper

Or include in your html dist/simple-whisper.min.js

This library requiere a Web3 implementation. If the client is not Web3 1.0 ready, you can provide an implementation

npm install web3-1beta
#or 
yarn add web3-1beta

You can easily test your code on a private node with docker:

npm run run-local-node
npm run stop-local-node
#or 
yarn run-local-node
yarn stop-local-node

use

simple symetric key channel

const u1 = new SimpleWhisper(new Web3(Web3.givenProvider || 'ws://localhost:8546'));
await Promise.all([
    u1.config({topic: "something"}),
    u1.useNewSymKey("somepass")
]);
 
u1.subscribe({useSymKey: true}, (message) => {
    console.log(message.payload);
    //>{hello: "world"}
});
 
const u2 = new SimpleWhisper(new Web3(Web3.givenProvider || 'ws://localhost:8546'));
await Promise.all([
    u2.config({topic: "something"}),
    u2.useNewSymKey("somepass")
]);
 
u2.post({hello: "world"}, {useSymKey: true});

answer an offer

const u1 = new SimpleWhisper(new Web3(Web3.givenProvider || 'ws://localhost:8546'));
await Promise.all([
    u1.config({topic: "token_market"}),
    u1.useNewSymKey("token_market_key"),
    u1.useNewKeyPair()
]);
 
u1.subscribe({}, (message) => {
    console.log(`${message.payload.name} (${message.authorSig}) accepted our offer !`);
    //
    ...
});
 
u1.post({id: 1, offer: {unit: "eth", qte: 0.1} demand: {unit: "btc", qte: 0.1}}, {useSymKey: true, ttl: 60});
 
const u2 = new SimpleWhisper(new Web3(Web3.givenProvider || 'ws://localhost:8546'));
await Promise.all([
    u2.config({topic: "token_market"}),
    u2.useNewSymKey("token_market_key"),
    u2.useNewKeyPair()
]);
 
u2.subscribe({useSymKey: true}, (message) => {
    // subscribe to messages from u1 to u2
    u2.subscribeBack((messagePers) => {...})
 
    if(message.payload.unit === "eth" && ...) {
        //answer using u1 pubKey
        message.postBack({name: "sw", id: message.payload.id});
    }
});

asymetric key

const u1 = new SimpleWhisper(new Web3(Web3.givenProvider || 'ws://localhost:8546'));
await Promise.all([
    u1.config({topic: "something"}),
    u1.useNewKeyPair()
]);
 
const u2 = new SimpleWhisper(new Web3(Web3.givenProvider || 'ws://localhost:8546'));
await Promise.all([
    u2.config({topic: "something"}),
    u2.useNewKeyPair()
]);
 
u2.setRemotePublicKey(await u1.getPublicKey());
u1.setRemotePublicKey(await u2.getPublicKey());
 
u1.subscribe({}, (message) => {
    console.log(message.payload);
    //>{hello: "I'm u2"}
});
 
u2.subscribe({}, (message) => {
    console.log(message.payload);
    //>{hello: "I'm u1"}
});
 
u1.post({hello: "I'm u1"});
u2.post({hello: "I'm u2"});

API

contribute

1. Open an issue to discuss about your ideas
2. Be sure the code 100% tested
3. Be sure the api's docs are up to date
4. Make a PR !

If you have created something awesome using simple-whisper, tell me! I'd love to share it!