sudo_set_min_allowed_uids
Call v320 → current #79Sets the minimum number of UIDs required on a subnet .
View calls on chainCall Workflow
This diagram shows the call execution flow: starting with sudo_set_min_allowed_uids, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch and modifies storage: SubtensorModule.MinAllowedUids, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
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Used by: subnet owners
The Big Picture
Sets a floor for subnet size. The subnet won't deregister neurons below this count.
Use Cases
- Guaranteeing minimum subnet size
- Stability requirements
From Chain Metadata
The extrinsic sets the minimum allowed UIDs for a subnet. It is only callable by the root account.
Input Parameters
Permissions
Origin
Root
Required Role
Permission data inferred from metadata. May be incomplete.
Requirements
- Caller is root or subnet owner
- Subnet exists
- Value <= current count and <= max_allowed_uids
Effects
Storage Modified
Postconditions
- MinAllowedUids updated
Side Effects
- Subnet cannot shrink below this size
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_min_allowed_uids call (typed, named args)
const netuid = 1;
const min_allowed_uids = 0;
const tx = api.tx.AdminUtils.sudo_set_min_allowed_uids({
netuid,
min_allowed_uids,
});Runtime Info
View Source- Pallet Index
- 19
- Call Index
- 79
- First Version
- v320
- Current Version
- v411