NetworkMinLockCostSet

Event Re-added v133 → v133, v134 → v135, v136 → v141, v142 → v148, v149 → v165, v195 → v219, v233 → v247, v252 → v265, v273 → v277, v290 → v315, v320 → v326, v334 → v367, v372 → current #59

Emitted when minimum subnet lock cost is changed.

View events on chain

Useful for: subnet ownersdevelopersanalyticsvalidators

The Big Picture

Creating a subnet requires locking TAO as collateral. NetworkMinLockCost sets the floor - even during low-demand periods, you must lock at least this much. Actual lock cost can be higher based on demand. This parameter ensures meaningful commitment from subnet creators.

Why This Matters

The minimum lock cost is your entry price for creating a subnet. Even in best conditions, you need at least this much TAO to lock. Understanding the floor helps you budget for subnet creation and evaluate if it's economically feasible for you.

Example Scenario

Subnet creation was getting too cheap, leading to low-quality subnets. They raise NetworkMinLockCost from 100 TAO to 500 TAO. NetworkMinLockCostSet fires. Now even during low demand, creating a subnet requires locking at least 500 TAO - higher barrier ensures more serious creators.

Common Questions

Is lock cost the same as burn cost?: No. Lock cost is collateral - you get it back if you dissolve properly. Burn is permanent. Subnet creation typically uses lock, not burn.
Can lock cost go below minimum?: No, that's the floor. Lock cost adjusts with demand but never below NetworkMinLockCost. Minimum is your best-case cost.
What if I can't afford the minimum?: You can't create a subnet until you have enough TAO to lock. Save up, or find investors willing to provide the collateral.

Use Cases

Track minimum capital required to create subnets
Plan subnet creation budgets
Monitor network economic policies
Build subnet creation planning tools

How to Use This Event

→ Track minimum lock cost for budget planning
→ Monitor governance changes affecting subnet creation costs
→ Build subnet creation cost estimation tools

From Chain Metadata

the network minimum locking cost is set.

Triggers

Preconditions

Caller has admin/sudo privileges

May fail with

NetworkDoesNotExist SubNetworkDoesNotExist RootNetworkDoesNotExist NetworkExist HotKeyNotRegisteredInNetwork EmissionValuesDoesNotMatchNetworks DidNotPassConnectedNetworkRequirement NetworkTxRateLimitExceeded IncorrectNetworkVersionKey AllNetworksInImmunity CanNotSetRootNetworkWeights

Effects

Postconditions

NetworkMinLockCost updated

Side Effects

Changes minimum TAO required to create subnet

Event Data

#	Name	Type	Description
0	arg0	u64	Event field #0 (u64)

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

Version History

Version:

v133 block 1,404,224 1 args

v134 block 1,455,498 1 args

v136 block 1,756,781 1 args

v142 block 2,543,779 1 args

v149 block 3,014,339 1 args

v195 block 3,791,350 1 args

v233 block 4,920,350 1 args

v252 block 5,163,656 1 args

v273 block 5,659,032 1 args

v290 block 5,947,548 1 args

v320 block 6,523,566 1 args

v334 block 6,811,690 1 args

v372 block 7,430,358 1 args Current

Runtime Info

View Source

Pallet Index: 7
Event Index: 59
First Version: v133
Current Version: v393

Back to SubtensorModule Events