AlphaValues

Storage Map v156 → v472 · 1 shape change

Alpha low and high bounds per subnet .

Queried by: validatorssubnet ownersdevelopers

The Big Picture

When Liquid Alpha is enabled, alpha values are bounded by these low/high parameters. Returns (alpha_low, alpha_high) tuple. These bounds constrain how alpha adjusts during consensus calculations.

Use Cases

Check alpha bounds for a subnet
Understand liquid alpha dynamics
Build alpha visualization tools

From Chain Metadata

MAP ( netuid ) --> (alpha_low, alpha_high)

Purpose & Usage

Purpose

Define the range for liquid alpha calculations.

Common Query Patterns

Query by netuid

Part of: Liquid Alpha

Migration Notes

v424 v432 Breaking

key type changed from u16 to NetUid

Update decoders: SCALE encoding is positional, so any signature change (added, removed, or type-changed fields, or storage shape changes) shifts byte offsets and existing decoders will misparse this item. Re-derive types from the new metadata.

Query Keys

#	Name	Type	Description
1	netuid netuid	NetUid u16	Subnet ID

Stored Value

(u16, u16)

.0
alpha_low — Lower bound of the alpha consensus parameter (u16, 0..65535).
.1
alpha_high — Upper bound of the alpha consensus parameter (u16, 0..65535).

Default Value

0x33b366e6 (raw SCALE bytes)

Absent keys read as this value — querying a key that has never been written returns this default, not an error or empty result.

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);

// Query AlphaValues storage
const netuid = 1;

const result = await api.query.SubtensorModule.AlphaValues.getValue(netuid);
console.log("AlphaValues:", result);

Version History

Version:

v156 block 3,321,841 Added

v425–v431 · runtime versions skipped on chain (never deployed)

v432 block 8,636,190 Shape changed Current

key : u16 → NetUid

Runtime Info

View Source

Pallet: SubtensorModule
Storage Kind: Map
First Version: v156
Current Version: v472

Back to SubtensorModule Storage