LastAdjustmentBlock

Storage Map v101 → v411

Block of last difficulty /burn adjustment per subnet .

Queried by: minersdevelopersanalytics

The Big Picture

Registration difficulty and burn costs adjust periodically. This tracks when the last adjustment occurred. Combined with AdjustmentInterval, you can predict next changes.

Use Cases

Calculate time until next adjustment
Monitor adjustment frequency
Plan registration timing

From Chain Metadata

MAP ( netuid ) --> Block at last adjustment.

Purpose & Usage

Purpose

Track when registration costs were last adjusted.

Common Query Patterns

Query by netuid

Query Keys

#	Name	Type	Description
1	netuid	u16	netuid (u16, hashed key component)

Stored Value

u64

Block (u64)

RAO -> TAO (/ 10^9)

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 LastAdjustmentBlock storage
const netuid = 1;

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

Version History

Version:

v101 block 1 Added

v123 block 720,235 Internal re-bind

v149 block 3,014,339 Internal re-bind

v166–v194 · runtime versions skipped on chain (never deployed)

v195 block 3,791,350 Internal re-bind

v278–v289 · runtime versions skipped on chain (never deployed)

v290 block 5,947,548 Internal re-bind Current

Runtime Info

View Source

Pallet: SubtensorModule
Storage Kind: Map
First Version: v101
Current Version: v411

Back to SubtensorModule Storage