LastTxBlockDelegateTake

Storage Map v149 → v411

Block of last delegate take change for an account.

Queried by: validatorsdevelopers

The Big Picture

Delegate take changes are rate-limited to protect stakers. This tracks when take was last changed, enabling cooldown enforcement.

Use Cases

Check delegate take cooldowns
Plan take adjustments
Debug rate limit errors

From Chain Metadata

MAP ( key ) --> last_tx_block_delegate_take

Purpose & Usage

Purpose

Track delegate take modifications for rate limiting.

Common Query Patterns

Query by account address

Query Keys

#	Name	Type	Description
1	key	[u8; 32] [32]	key ([u8; 32], hashed key component)

Stored Value

u64

last_tx_block_delegate_take (u64)

RAO -> TAO (/ 10^9)

Relationships

Modified By

decrease_take increase_take

Related Events

TakeDecreased TakeIncreased

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 LastTxBlockDelegateTake storage
const key = "0x0000000000000000000000000000000000000000000000000000000000000000";

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

Version History

Version:

v149 block 3,014,339 Added

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

v195 block 3,791,350 Internal re-bind Current

Runtime Info

View Source

Pallet: SubtensorModule
Storage Kind: Map
First Version: v149
Current Version: v411

Back to SubtensorModule Storage