npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@eternl/cardano-dapp-connector-bridge

v1.2.0

Published

A postMessage bridge to connect dApps to the Eternl DApp Browser loading apps into an iframe.

Downloads

7

Readme

cardano-dapp-connector-bridge

A postMessage bridge to connect to dApps loaded into an iframe.

Motivation

In April 2022, browser extensions are the only way to connect to Cardano dApps. The ecosystem lacks a dapp-connector API on mobile devices and the web. This bridge script attempts to fill this gap.

With CIP-0030, Cardano already has a dapp-connector specification. Reusing this API will contribute to rapid adoption.

How to: dApps

DApp includes cardano-dapp-connector-bridge.js and calls:

// Calling this function is mandatory.
initCardanoDAppConnectorBridge(async (walletApi) => {

  // Bridge was established by the wallet.
  // In this callback you can do, whatever is necessary to setup a good connection, eg.
  
  if(walletApi.name === 'eternl') {
    
    // Here you can set any global flags, eg. 
    // isIframeEmbedded = true
    // addWalletFee = true

    // You could also just connect through the dapp-connector as you would normally do via your connect wallet button.
    // eg.:

    // const fullApi = await walletApi.enable() // walletApi is window.cardano.eternl
    
    // Eternl fee address (mainnet/testnet), see EternlDAppBrowser.md for more info.
    // const feeAddress = window.cardano.eternl.experimental.feeAddress // normal string, bech32 address.
  }
})

How to: wallets

Wallets need to provide their API object as usual, but replace all functions with a simple string:

var bridgeInitialApi          = {

  isBridge:                   true,

  isEnabled:                  'isEnabled',
  enable:                     'enable',

  experimental: {             // your experimental object, if it exist

    appVersion: {

      major:                  1,
      minor:                  7,
      patch:                  0
    }
  },

  apiVersion:                 '0.1.0',
  name:                       'yourWalletNameSpace',
  icon:                       'data:image/png;base64,youricon',
}

var bridgeFullApi = {

  getNetworkId:               'getNetworkId',
  getUsedAddresses:           'getUsedAddresses',
  getUnusedAddresses:         'getUnusedAddresses',
  getRewardAddresses:         'getRewardAddresses',
  getChangeAddress:           'getChangeAddress',
  getBalance:                 'getBalance',
  getUtxos:                   'getUtxos',

  signTx:                     'signTx',
  signData:                   'signData',
  submitTx:                   'submitTx',

  getCollateral:              'getCollateral',

  experimental: {             // your experimental object, if it exist

    getCollateral:            'getCollateral'
  }
}

The API objects will be automatically recreated on the dApp side using postMessage calls.
See cardano-dapp-connector-bridge-init-wallet.js for more hints on how to implement it.

Response headers

There are two options available.

  1. Allow your page to be loaded in ANY web context (local, online, app, anywhere). This might be necessary to make third party services work correctly.
  2. Restrict your page to be loaded only on certain domains.

Both options need to remove:

X-Frame-Options

For option 1 minimize response headers and remove any cross-origin or content-security-policy response headers.

For option 2, to be able to load a dApp page into an iframe, ALL response headers must be configured correctly. This includes pages, images (CDNs) etc.

Add:

content-security-policy: frame-ancestors https://*.eternl.io/ https://eternl.io/ ionic: capacitor: chrome-extension: http://localhost:*/ https://localhost:*/;

cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: cross-origin

What frame-ancestors do?

https://*.eternl.io/ https://eternl.io/ -- page can be embedded on eternl pages.  
ionic: capacitor: chrome-extension: -- page can be embedded in apps.  
http://localhost:*/ https://localhost:*/ -- page can be embedded in development environments.