TakeIncreased

Event Re-added v149 → v165, v195 → v219, v233 → v247, v252 → v265, v273 → v277, v290 → v315, v320 → v326, v334 → v367, v372 → current #63

Emitted when a delegate increases their commission rate.

View events on chain

Useful for: delegatorsstakersvalidatorsanalytics

The Big Picture

A delegate's take (commission) directly affects delegator returns. When a validator increases their take, delegators receive a smaller share of emissions. Take increases are rate-limited to prevent sudden changes, but delegators should still monitor their validators. This event is a signal to potentially re-evaluate your delegation.

Why This Matters

Your delegation earnings = (validator's emissions × your share) × (1 - take). If take goes from 10% to 20%, you just lost 10% of your income. This event tells you when it happens so you can decide whether to stay or find a more competitive validator.

Example Scenario

You're delegated to Validator X at 10% take, earning ~5 TAO/day. TakeIncreased fires showing take went from 10% to 15%. Your earnings will drop to ~4.4 TAO/day. You can stay, or shop around - another validator might offer 8% take.

Common Questions

How much warning do I get before a take increase?: Take increases are rate-limited (check TxDelegateTakeRateLimit), so validators can't suddenly jump from 5% to 50%. But you should still monitor and react promptly.
Should I immediately undelegate when take increases?: Not necessarily. Consider: Is the new rate still competitive? Is the validator reliable and honest? Sometimes paying slightly more for quality is worth it.

Use Cases

Alert delegators when their validator raises fees
Monitor validator fee trends across the network
Track which validators are increasing take (potential warning sign)
Build comparison tools showing validator fee history

How to Use This Event

→ Subscribe to hotkeys you're delegating to
→ Alert immediately when take increases on your validators
→ Build dashboards showing take changes over time

From Chain Metadata

the take for a delegate is increased.

Triggers

Emitted by

increase_take

Preconditions

Hotkey is already a delegate
New take is higher than current take
New take does not exceed MaxDelegateTake
Take change is not rate limited

Effects

Storage Modified

Delegates LastTxBlockDelegateTake

Postconditions

Delegate's take rate increased
Takes effect for future reward distributions

Side Effects

Delegators will receive smaller share of rewards

Event Data

#	Name	Type	Description
0	arg0	AccountId	Event field #0 (AccountId) (hex -> SS58)
1	arg1	AccountId	Event field #1 (AccountId) (hex -> SS58)
2	arg2	u16	Event field #2 (u16)

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

Version History

Version:

v149 block 3,014,339 3 args

v195 block 3,791,350 3 args

v233 block 4,920,350 3 args

v252 block 5,163,656 3 args

v273 block 5,659,032 3 args

v290 block 5,947,548 3 args

v320 block 6,523,566 3 args

v334 block 6,811,690 3 args

v372 block 7,430,358 3 args Current

Runtime Info

View Source

Pallet Index: 7
Event Index: 63
First Version: v149
Current Version: v393

Back to SubtensorModule Events