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
Emitted by
Preconditions
- Data provided
- Hash unique
Effects
Storage Modified
Postconditions
- Preimage stored
- Deposit held
Event Data
| # | Name | Type | Description |
|---|---|---|---|
| 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