Terminated

Event v334 → current #1

Emitted when a contract is terminated and removed from the chain.

View events on chain

Useful for: developersanalytics

The Big Picture

Contract termination ends a contract's lifecycle. Code is unlinked, storage cleared, deposits refunded.

Use Cases

Track contract lifecycle events
Detect self-destructing contracts
Update contract registries

From Chain Metadata

Contract has been removed.

Triggers

Preconditions

Contract exists
Termination triggered

Effects

Postconditions

Contract no longer exists
ContractInfoOf cleared
Storage deposits refunded

Side Effects

Contract can no longer be called
Remaining balance transferred to beneficiary

Event Data

#	Name	Type	Description
0	contract	AccountId	The terminated contract's address (hex -> SS58)
1	beneficiary	AccountId	Account receiving remaining contract balance (hex -> SS58)

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

Runtime Info

Pallet Index: 29
Event Index: 1
First Version: v334
Current Version: v393

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