Polkascan Explorer UI is a client-sided Angular based application that utilizes PolkADAPT and its Adapters to obtain data from multiple data sources. Its design is based on flat Material component design, styled in Polkascan branding.

Use the following command to clone this repository and polkadapt submodule:

git clone --recurse-submodules <repository_url>

If you already cloned this repository, but without submodules, then you still need to initialize the submodules:

git submodule init
git submodule update

You need the submodule to build and run this application.

You will need to add a file named config.json in src/assets/. This file contains configuration per network for the used PolkADAPT adapters.

The order in which the networks are shown in the UI is also based on this configuration. It is advised to add multiple endpoints for fallback and custom switching capabilities.

Explorer UI can run on the Polkacan Explorer API or Subsquid endpoints. Or both. Make sure that explorerWsUrlArray and/or subsquid is added to your networks.

To use the Polkascan Explorer UI with the Polkascan Explorer API, see the installation section of the explorer bundle repos.

{
  "polkadot": {
    "substrateRpcUrlArray": ["wss:https://rpc.polkadot.io"],
    "explorerWsUrlArray": ["wss:https://mycustomnode.io/polkadot"],
    "coingecko": {
      "coinId": "polkadot"
    },
    "subsquid": {
      "archiveUrl": "https://polkadot.explorer.subsquid.io/graphql",
      "explorerUrl": "https://squid.subsquid.io/polkadot-explorer/graphql",
      "giantSquidExplorerUrl": "https://squid.subsquid.io/gs-explorer-polkadot/graphql",
      "giantSquidMainUrl": "https://squid.subsquid.io/gs-main-polkadot/graphql"
    }
  },
  "kusama": {
    "substrateRpcUrlArray": ["wss:https://kusama-rpc.polkadot.io", "wss:https://other-kusama-node.io"],
    "explorerWsUrlArray": ["wss:https://mycustomnode.io/kusama"],
    "coingecko": {
      "coinId": "kusama"
    },
    "subsquid": {
      "archiveUrl": "https://kusama.explorer.subsquid.io/graphql",
      "explorerUrl": "https://squid.subsquid.io/kusama-explorer/graphql",
      "giantSquidExplorerUrl": "https://squid.subsquid.io/gs-explorer-kusama/graphql",
      "giantSquidMainUrl": "https://squid.subsquid.io/gs-main-kusama/graphql"
    }
  }
}

If you want a quick and easy way to run the application, you can build a Docker image with the included Dockerfile. In a shell, from this project's directory, run the following command to build the Docker image:

docker build -t explorer-ui .

To run the image and start a local webserver with the application:

docker run --rm -p 8000:80 explorer-ui

You can now open your web browser and navigate to http:https://localhost:8000/ to visit the application.

You can also use the hosted Docker image at Docker Hub, you only need to map a volume to overwrite the config.json in the container:

docker run --rm -it -p 80:80 -v /path/to/your/src/assets/config.json:/usr/share/nginx/html/assets/config.json polkascan/explorer-ui

These are the instructions for a manual build. It is advised to use the latest Node LTS. Or at least the node version asked by Angular or Polkadot JS:

You need to install and build polkadapt before you install and build the application:

cd polkadapt
npm i
npm run build
cd ..
npm i
npm run build

The build artifacts will be stored in the dist/ directory.

For a dev server, open a terminal and run:

cd polkadapt
npm i
npm run build

When making changes in polkadapt source files you have to build again.

Now open a second terminal and run:

npm i
npm run start

Navigate to http:https://localhost:4200/. The app will automatically reload if you change any of the source files.