TakeDecreased

Event Re-added v149 → v165, v195 → v219, v233 → v247, v252 → v265, v273 → v277, v290 → v315, v320 → v326, v334 → v367, v372 → current #62

Emitted when a delegate decreases their commission rate.

View events on chain

Useful for: delegatorsstakersvalidatorsanalytics

The Big Picture

Validators compete for delegated stake by offering better terms. A take decrease means delegators get a larger share of emissions. Unlike increases (which are rate-limited), decreases can happen immediately. This is usually a positive signal - the validator is trying to attract or retain delegators.

Why This Matters

Lower take = more earnings for you. If a validator you're watching drops their take from 15% to 10%, that's a 5% boost to your returns. This event helps you find and respond to competitive opportunities in the validator market.

Example Scenario

You're evaluating validators and Validator Y just dropped take from 18% to 12%. TakeDecreased fires with the new rate. Combined with their solid performance, this might make them your new delegation target. More stake flows to Validator Y, rewarding their competitive pricing.

Common Questions

Can validators decrease and then quickly increase take?: They can decrease immediately, but increases are rate-limited. So a validator can't bait you with low take then immediately raise it. There's a waiting period.
Why would a validator lower their take?: To attract more delegated stake, retain existing delegators, or match competitor pricing. More delegated stake = more voting power = potentially higher emissions overall.

Use Cases

Find validators offering better rates
Track competitive dynamics between validators
Notify delegators of improved terms
Build validator comparison tools

How to Use This Event

→ Monitor validators you're considering for delegation
→ Track network-wide take trends to find opportunities
→ Build alerts for validators matching your criteria

From Chain Metadata

the take for a delegate is decreased.

Triggers

Emitted by

decrease_take

Preconditions

Hotkey is already a delegate
New take is lower than current take
New take is at least MinDelegateTake
Take change is not rate limited

Effects

Storage Modified

Delegates LastTxBlockDelegateTake

Postconditions

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

Side Effects

Delegators will receive larger share of rewards
May attract more delegations

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 TakeDecreased events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("SubtensorModule") &&
      event.method === "TakeDecreased"
    )
    .forEach(({ event }) => {
      console.log("TakeDecreased:", 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: 62
First Version: v149
Current Version: v393

Back to SubtensorModule Events