Called

Event v334 → current #6

Emitted when a smart contract is called and executed.

View events on chain

Useful for: developersanalytics

The Big Picture

Every contract call execution is logged. Essential for tracing activity and analytics.

Use Cases

Track contract call activity
Monitor usage patterns
Debug interactions

From Chain Metadata

A contract was called either by a plain account or another contract.

Triggers

Emitted by

call call_old_weight

Preconditions

Contract exists
Caller provided sufficient gas

Effects

Storage Modified

ContractInfoOf

Postconditions

Contract code executed
Gas consumed

Side Effects

Contract may have modified state
Contract may have emitted ContractEmitted events

Event Data

#	Name	Type	Description
0	caller	Origin	Account that initiated the contract call
1	contract	AccountId	Contract that was called (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 Called events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("Contracts") &&
      event.method === "Called"
    )
    .forEach(({ event }) => {
      console.log("Called:", event.data.toHuman());
    });
});

Runtime Info

Pallet Index: 29
Event Index: 6
First Version: v334
Current Version: v393

Back to Contracts Events