Contributed

Event v273 → current #1

Emitted when TAO is contributed to a crowdloan.

View events on chain

Useful for: stakersdevelopersanalytics

The Big Picture

Someone has backed a crowdfunding campaign.

Use Cases

Track contributions
Monitor fundraising progress

From Chain Metadata

A contribution was made to an active crowdloan.

Triggers

Emitted by

contribute

Preconditions

Crowdloan is active
Contributor has balance
Meets minimum

Effects

Storage Modified

Contributions Crowdloans

Postconditions

Contribution recorded
Funds transferred

Side Effects

Total raised increased

Event Data

#	Name	Type	Description
0	crowdloan_id	u32	Crowdloan identifier
1	contributor	AccountId	Account that contributed (hex -> SS58)
2	amount	u64	Amount contributed (RAO) (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 Contributed events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("Crowdloan") &&
      event.method === "Contributed"
    )
    .forEach(({ event }) => {
      console.log("Contributed:", event.data.toHuman());
    });
});

Runtime Info

Pallet Index: 27
Event Index: 1
First Version: v273
Current Version: v393

Back to Crowdloan Events