LiquidityRemoved

Event v290 → v292, v297 → v298, v301 → v385, v391 → current #3

Emitted when a user removes an entire liquidity position .

View events on chain

Useful for: stakersdevelopersanalyticswallets

The Big Picture

LP removals return assets plus accumulated fees. fee_tao/fee_alpha show earnings.

Use Cases

Track LP exits
Monitor TVL decreases
Confirm position closure
Analyze fee accumulation

From Chain Metadata

Event emitted when a liquidity position is removed from a subnet's liquidity pool.

Part of: Concentrated Liquidity

Triggers

Emitted by

remove_liquidity

Preconditions

Position existed
User owned the position

Effects

Storage Modified

CurrentLiquidity FeeGlobalAlpha FeeGlobalTao Positions ScrapReservoirAlpha ScrapReservoirTao TickIndexBitmapWords Ticks

Postconditions

Position deleted
TAO/Alpha returned
Fees paid out

Side Effects

Updates tick state
May affect pool depth

Event Data

#	Name	Type	Description
0	coldkey	AccountId	Coldkey of the liquidity provider (hex -> SS58)
1	hotkey	AccountId	Hotkey associated with the liquidity provider (hex -> SS58)
2	netuid	u16 NetUid	Subnet ID for the liquidity pool
3	position_id	PositionId	Unique identifier of the closed position
4	liquidity	u64	Liquidity units removed (raw u64)
5	tao → tao_withdrawn	u64 TaoBalance	TAO withdrawn from the pool (RAO; ÷10⁹ for TAO)
6	alpha → alpha_withdrawn	u64 AlphaBalance	Alpha withdrawn from the pool (alpha-RAO; ÷10⁹ for alpha) (RAO -> TAO (/ 10^9))
7	fee_tao	u64 TaoBalance	Accumulated TAO fees collected (TAO RAO) (RAO -> TAO (/ 10^9))
8	fee_alpha	u64 AlphaBalance	Accumulated Alpha fees collected (alpha-RAO) (RAO -> TAO (/ 10^9))
9	tick_low	TickIndex	Lower tick boundary of the closed range (price = 1.0001^tick)
10	tick_high	TickIndex	Upper tick boundary of the closed range (price = 1.0001^tick)

Code Examples

import { createClient, Binary } from "polkadot-api";
import { getWsProvider } from "polkadot-api/ws";
import { sub } from "@polkadot-api/descriptors"; // generated by: npx papi add sub -w wss://entrypoint-finney.opentensor.ai:443

const client = createClient(getWsProvider("wss://entrypoint-finney.opentensor.ai:443"));
const api = client.getTypedApi(sub);

// Subscribe to LiquidityRemoved events
client.finalizedBlock$.subscribe(async (block) => {
  const events = await api.event.Swap.LiquidityRemoved.get(block.hash);
  for (const evt of events) {
    console.log("LiquidityRemoved:", evt.payload);
  }
});

On-Chain Activity

Emission Frequency

●●○○○○ Moderate 10K–100K emissions

Occasional use

#44 most emitted event

As of block 7,429,232

Version History

Version:

v290 block 5,947,548 11 args

v297 block 6,067,943 11 args

v301 block 6,205,194 11 args

v391 block 7,782,857 11 args Current

Runtime Info

View Source

Pallet Index: 28
Event Index: 3
First Version: v290
Current Version: v411

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