@dscvr-one/canvas-client-sdk NPM

@dscvr-one/canvas-client-sdk

This SDK can be used by DSCVR Canvas Applications to communicate with the DSCVR Frontend.

Current features include:

Get the current user and content.
Prompt the user to open an external link.
Execute wallet transactions.

Installation

Install with your favorite package manager:

npm install @dscvr-one/canvas-client-sdk

yarn

yarn add @dscvr-one/canvas-client-sdk

Usage

To use the SDK:

Import CanvasClient and CanvasInterface into your typescript project:

import {
  createCanvasClient,
  type CanvasInterface,
  type CanvasClient,
} from '@dscvr-one/canvas-client-sdk';

Instantiate the CanvasClient:

const canvasClient = createCanvasClient();

Start the handshake:

const response = await canvasClient.ready();
//
if (response) {
  // The handshake allows access to the user and the content that the application is embedded in.
  const user: CanvasInterface.Handshake.User = response.untrusted.user;
  const content: CanvasInterface.Handshake.Content = response.untrusted.content;
  // ...
}

Destruction

If the client is being instantiated in a react hook or in a vue component/composable (anything with a lifecycle), we recommend to destroy the client on hot refreshes to avoid CanvasInterface.ClientAlreadyInitializedError while on localhost.

e.g Vue

onMounted(() => {
  canvasClient = createCanvasClient();
  if (!canvasClient) return;
  response = await canvasClient.ready();
});

onUnmounted(() => {
  canvasClient?.destroy();
});

e.g React

useEffect(() => {
  canvasClient = createCanvasClient();
  if (canvasClient) {
    response = await canvasClient.ready();
  }

  // Destroy the client on effect cleanup
  return () => {
    canvasClient?.destroy();
  };
});