Burned

Event v149 → v424, v432 → current #11

Emitted when tokens are permanently burned.

From Chain Metadata

Some amount was burned from an account.

Migration Notes

v424 v432 Breaking

amount changed from u64 to TaoBalance

Update decoders: SCALE encoding is positional, so any signature change (added, removed, or type-changed fields, or storage shape changes) shifts byte offsets and existing decoders will misparse this item. Re-derive types from the new metadata.

Triggers

Emitted by

burn

Preconditions

Account has tokens to burn
Burn operation executed

Effects

Storage Modified

TotalIssuance

Postconditions

Account balance decreased
Total issuance decreased

Side Effects

Deflationary effect on token supply

Event Data

#	Name	Type	Description
0	who	AccountId	who: Account address (32 bytes, SS58-encoded) (hex -> SS58)
1	amount	TaoBalance T::Balance	amount: Balance in chain native currency (RAO for TAO; ÷10⁹)

Code Examples

import { createClient, Binary } from "polkadot-api";
import { getWsProvider } from "polkadot-api/ws";
import { sub } from "@polkadot-api/descriptors"; // generated by: npx papi add sub -w wss://entrypoint-finney.opentensor.ai:443

const client = createClient(getWsProvider("wss://entrypoint-finney.opentensor.ai:443"));
const api = client.getTypedApi(sub);

// Subscribe to Burned events
client.finalizedBlock$.subscribe(async (block) => {
  const events = await api.event.Balances.Burned.get(block.hash);
  for (const evt of events) {
    console.log("Burned:", evt.payload);
  }
});

Version History

Version:

v149 block 3,014,339 2 args

v432 block 8,636,190 2 args Current

Runtime Info

Pallet Index: 5
Event Index: 11
First Version: v149
Current Version: v472

Back to Balances Events