Fruzhin is a Java implementation of the Polkadot Host. With the help of TeaVM it is now available as a JS based light client in web environments. It makes use of other full nodes to provide RPC server like behaviour.
It's been funded by Polkadot Pioneers Prize.
Warning Fruzhin is in pre-production state
In order to use Fruzhin in your webpage you have to import the appropriate JS files from UNKPG. Then you can call the
fruzhin.main() method with a string array parameter that takes one entry. The parameter can be one of the following:
- Well known chain name (polkadot, westend, kusama)
- A chain spec string
<!DOCTYPE html>
<html>
<head>
<title>Fruzhin</title>
<script type="module" src="https://unpkg.com/fruzhin/dist/js/fruzhin-lib.js"></script>
</head>
<body>
<script type="module">
fruzhin.main(['polkadot']);
</script>
</body>
</html>Once Fruzhin is started an RPC client is exported under a wsRpc object. Making a call is easy.
wsRpc.send('{"jsonrpc":"2.0","id":1,"method":"system_name","params":[]}')
Then the response can be retrieved by calling wsRpc.nextResponse().
NOTE wsRpc.nextResponse() returns null if no response is present in the queue.