sudo_set_network_min_lock_cost
Call v138 → v298, v301 → v385, v391 → current #36Sets the minimum TAO lock cost for creating a subnet .
View calls on chainCall Workflow
This diagram shows the call execution flow: starting with sudo_set_network_min_lock_cost, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks where it may fail with errors like NetworkDoesNotExist, followed by dispatch and modifies storage: SubtensorModule.NetworkMinLockCost, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
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Used by: subnet owners
The Big Picture
Creating a subnet requires locking TAO. This sets the minimum, preventing trivial subnet creation.
Use Cases
- Controlling subnet creation costs
- Anti-spam measures
From Chain Metadata
The extrinsic sets the min lock cost for the network. It is only callable by the root account. The extrinsic will call the Subtensor pallet to set the min lock cost for the network.
Input Parameters
| # | Name | Type | Description |
|---|---|---|---|
| 0 | lock_cost | u64 TaoBalance | lock_cost: TAO amount in RAO (÷10⁹ for TAO) (RAO -> TAO (/ 10^9)) |
Permissions
Origin
Root
Required Role
Permission data inferred from metadata. May be incomplete.
Requirements
- Caller is root account
Effects
Storage Modified
Postconditions
- NetworkMinLockCost updated
Side Effects
- Affects subnet creation barrier
Possible Errors
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);
// Build sudo_set_network_min_lock_cost call (typed, named args)
const lock_cost = 1_000_000_000n;
const tx = api.tx.AdminUtils.sudo_set_network_min_lock_cost({
lock_cost,
});Version History
v138 block 1,907,363 1 args
v301 block 6,205,194 1 args
v391 block 7,782,857 1 args Current
Runtime Info
View Source- Pallet Index
- 19
- Call Index
- 36
- First Version
- v138
- Current Version
- v411