Noted

Event v133 → current #0

A preimage has been stored on-chain.

View events on chain
Useful for: validatorsanalyticsdevelopers

The Big Picture

Stores call data for proposals.

Use Cases

  • Track governance data storage

From Chain Metadata

A preimage has been noted.

Triggers

Preconditions

  • Data provided
  • Hash unique

Effects

Storage Modified

Postconditions

  • Preimage stored
  • Deposit held

Event Data

#NameTypeDescription
0
hash
H256 hash (H256)

Code Examples

import { ApiPromise, WsProvider } from "@polkadot/api";
import { stringCamelCase } from "@polkadot/util";

const provider = new WsProvider("wss://entrypoint-finney.opentensor.ai:443");
const api = await ApiPromise.create({ provider });

// Subscribe to Noted events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("Preimage") &&
      event.method === "Noted"
    )
    .forEach(({ event }) => {
      console.log("Noted:", event.data.toHuman());
    });
});

Runtime Info

Pallet Index
14
Event Index
0
First Version
v133
Current Version
v393