DustLost

Event v101 → current #1

Emitted when an account's remaining balance is below existential deposit.

View events on chain

From Chain Metadata

An account was removed whose balance was non-zero but below ExistentialDeposit, resulting in an outright loss.

Triggers

Preconditions

Account balance fell below existential deposit
Balance was non-zero

Effects

Postconditions

Remaining balance removed from account
Dust amount lost/burned

Side Effects

Account may be reaped

Event Data

#	Name	Type	Description
0	account	AccountId	Account account address (hex -> SS58)
1	amount	u64	Amount in RAO (÷10⁹ for TAO) (RAO -> TAO (/ 10^9))

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 DustLost events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("Balances") &&
      event.method === "DustLost"
    )
    .forEach(({ event }) => {
      console.log("DustLost:", event.data.toHuman());
    });
});

On-Chain Activity

Emission Frequency

●●○○○○ Moderate 10K–100K emissions

Occasional use

#43 most emitted event

As of block 7,429,232

Runtime Info

Pallet Index: 5
Event Index: 1
First Version: v101
Current Version: v393

Back to Balances Events