LastColdkeyHotkeyStakeBlock

Storage Map v238 → current

Block when stake was last added/removed for a coldkey -hotkey pair.

Queried by: developersstakers

The Big Picture

Staking operations may be rate-limited. This tracks the last block when stake changed for each coldkey-hotkey pair, enabling rate limit calculations.

Use Cases

Check staking cooldowns
Debug rate limit errors
Build staking timing tools

From Chain Metadata

Map (coldkey, hotkey) --> u64 the last block at which stake was added/removed.

Purpose & Usage

Purpose

Track staking activity timing for rate limiting.

Common Query Patterns

Query by (coldkey, hotkey)

Query Keys

#	Name	Type	Description
1	key1	AccountId	key1 (AccountId) (hex -> SS58)
2	key2	AccountId	key2 (AccountId) (hex -> SS58)

Stored Value

u64

Value in RAO (÷10⁹ for TAO)

RAO -> TAO (/ 10^9)

Code Examples

import { ApiPromise, WsProvider } from "@polkadot/api";
import { stringCamelCase } from "@polkadot/util";

const provider = new WsProvider("wss://entrypoint-finney.opentensor.ai:443");
const api = await ApiPromise.create({ provider });

// Query LastColdkeyHotkeyStakeBlock storage
const key1 = "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY";
const key2 = "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY";

const result = await api.query
  [stringCamelCase("SubtensorModule")]
  [stringCamelCase("LastColdkeyHotkeyStakeBlock")](
  key1,
  key2
);

console.log("LastColdkeyHotkeyStakeBlock:", result.toHuman());

Runtime Info

View Source

Pallet: SubtensorModule
Storage Kind: Map
First Version: v238
Current Version: v393

Back to SubtensorModule Storage