sudo_set_owner_hparam_rate_limit
Call v320 → current #75Sets how often subnet owners can change hyperparameters .
View calls on chainCall Workflow
This diagram shows the call execution flow: starting with sudo_set_owner_hparam_rate_limit, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch and modifies storage: SubtensorModule.OwnerHyperparamRateLimit, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
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Used by: subnet owners
The Big Picture
Prevents subnet owners from rapidly changing parameters, which could destabilize their subnet.
Use Cases
- Preventing rapid parameter changes
- Stability guarantees
From Chain Metadata
Sets the owner hyperparameter rate limit in epochs (global multiplier). Only callable by root.
Input Parameters
| # | Name | Type | Description |
|---|---|---|---|
| 0 | epochs | u16 | epochs (u16) |
Permissions
Origin
Root
Required Role
Permission data inferred from metadata. May be incomplete.
Requirements
- Caller is root account
Effects
Storage Modified
Postconditions
- OwnerHparamRateLimit updated
Side Effects
- Limits owner hyperparameter change frequency
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_owner_hparam_rate_limit call (typed, named args)
const epochs = 0;
const tx = api.tx.AdminUtils.sudo_set_owner_hparam_rate_limit({
epochs,
});Runtime Info
View Source- Pallet Index
- 19
- Call Index
- 75
- First Version
- v320
- Current Version
- v411