author_submitAndWatchExtrinsic

Description

Broadcasts a signed extrinsic and opens a subscription to receive status updates (in-block, finalized, or dropped).

Parameters

Position	Type	Description
0	string	Signed extrinsic hex

Notification Payload

Field	Description
result.status	One of future, ready, inBlock, finalized, dropped, invalid
result.dispatchError	Present when execution failed

WebSocket Request

{
  "jsonrpc": "2.0",
  "method": "author_submitAndWatchExtrinsic",
  "params": ["0x..."],
  "id": 1
}

JavaScript Example

const unsub = await api.rpc.author.submitAndWatchExtrinsic(tx, (status) => {
  if (status.isFinalized) {
    console.log('Finalized in block', status.asFinalized.toHex());
    unsub();
  }
});

Remember to unsubscribe once the extrinsic is finalized to avoid leaking listeners.