Class WsProvider

Name

WsProvider

Description

A JSON-RPC provider that connects to a WebSocket endpoint

Example

const provider = new WsProvider('wss://rpc.polkadot.io');

await provider.connect();

// Fetch the genesis hash
const genesisHash = await provider.send('chain_getBlockHash', [0]);
console.log(genesisHash);

// Subscribe to runtimeVersion changes
await provider.subscribe(
  {
    subname: 'chain_newHead',
    subscribe: 'chain_subscribeNewHeads',
    params: [],
    unsubscribe: 'chain_unsubscribeNewHeads',
  },
  (error, newHead, subscription) => {
    console.log('newHead', newHead);
  },
);

await provider.disconnect();
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