Paragraph Link

Paragraph Link is a small JS snippet that lets 3rd-party developers seamlessly onboard their users onto Paragraph.

Developers can also pre-configure their user's Paragraph publications using any tokens, team members, publication names, and more.

For example, the following usecases could find value in Link:

You run a platform that lets users mint membership NFTs. You want to give utility to these NFTs by letting your users easily create gated newsletters behind these NFTs.
You run a writing platform. You have an existing flow where you gather the user's wallet address and name of their publication. You want to let writers create a Paragraph newsletter using this existing name.
You operate a DAO. You want members of your DAO to contribute long-form content, and gate it behind the DAO's tokens.

Overview

Paragraph Link works as follows:

Collect some information from your user, in your own app via some onboarding flow. You can collect the name of their publication; gather contract addresses of the NFTs they’d like to gate with; etc
Open the Paragraph Link URL via a new window or iFrame and pass in all information you have
The user is prompted to connect their wallet
Then, the user’s account is created and pre-provisioned using all information you’ve passed us.

You can pass us the following information:

Parameter name	Description
publicationName	Name of the publication. Defaults to the user’s ENS name or wallet address.
publicationUrl	The URL slug of the publication (ie, ‘my-neat-blog’ would be accessible at https://paragraph.xyz/@my-neat-blog). Defaults to the user’s ENS name or wallet address.
communityName	The name of the gated community. Defaults to “Gated community”.
membershipName	The name of the membership that corresponds with this token. Defaults to “Access token”.
tokenAddress	The address of the smart contract. We support ERC721 and ERC20 tokens on the Ethereum or Matic (Polygon) networks.
tokenQuantity	The minimum number of tokens that readers must hold in order to access the publication. Defaults to 1.
tokenUrl	An optional URL that provides more information on the token (such as where to buy it). This is presented to readers if they don’t hold the token.

Append these parameters to the following URL, either in an iFrame or a new tab/window:

https://paragraph.xyz/link?publicationName=xyz&publicationUrl=yyy&…

Example Code

This code opens Paragraph Link in a new window:

// When a user clicks a button, open the popup
const popup = window.open("https://paragraph.xyz/link?publicationName=The%20simplest%20HTML%20example&publicationUrl=this-simplest-html", "popup", "width=600,height=600");
    window.addEventListener("message", function(e) {
        // Wait for Paragraph to signal that it's loaded.
        if ( e.data === "loaded") {
            // Send the 'init' message. This is required.
            popup.postMessage("init", "https://paragraph.xyz");


          // When the Paragraph flow completes, we'll broadcast
          // this message.
          } else if (e.data === 'updated') {
             // Handle this flow: show success message, etc
          }
    })

Example UI

Implemented by our friends at clubs.link:

Initial onboarding Paragraph iFrame step Final success step