LastCommitment

Storage Map v140 → current

Block number of the last commitment update for an account on a subnet .

Explore chain

Queried by: validatorsdevelopers

The Big Picture

This tracks when each commitment was last updated, enabling freshness checks and rate limiting.

Use Cases

Check how recently a commitment was updated
Implement rate limiting logic

Purpose & Usage

Purpose

Track when commitments were last modified for rate limiting and freshness.

Common Query Patterns

Query to check commitment freshness
Rate limit calculations

Query Keys

#	Name	Type	Description
1	key1	u16	key1 (u16)
2	key2	AccountId	key2 (AccountId) (hex -> SS58)

Stored Value

u32

value (u32)

Relationships

Modified By

set_commitment

Related Events

Commitment TimelockCommitment

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 LastCommitment storage
const key1 = 0;
const key2 = "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY";

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

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

On-Chain Activity

Write Frequency

●●●●●○ High 1M–10M est. writes

1M–10M estimated writes

#17 most written storage item

Write Source User Extrinsics

Modified via user-submitted extrinsics

As of block 7,429,232

Runtime Info

View Source

Pallet: Commitments
Storage Kind: Map
First Version: v140
Current Version: v393

Back to Commitments Storage