LastCommitment

Storage Map v140 → v411

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	netuid netuid raw: key1	u16	key1 (u16)
2	accountId account raw: key2	AccountId	key2 (AccountId) (hex -> SS58)

Stored Value

u32

value (u32)

Relationships

Modified By

set_commitment

Related Events

Commitment TimelockCommitment

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

const result = await api.query.Commitments.LastCommitment.getValue(key1, key2);
console.log("LastCommitment:", result);

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

Version History

Version:

v140 block 1,929,216 Added

v146 block 2,848,978 Internal re-bind

v149 block 3,014,339 Internal re-bind

v154 block 3,308,611 Internal re-bind

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

v195 block 3,791,350 Internal re-bind

v202 block 3,848,823 Internal re-bind

v207–v209 · runtime versions skipped on chain (never deployed)

v210 block 4,345,556 Internal re-bind

v213–v215 · runtime versions skipped on chain (never deployed)

v216 block 4,510,996 Internal re-bind

v220–v232 · runtime versions skipped on chain (never deployed)

v233 block 4,920,350 Internal re-bind

v235–v237 · runtime versions skipped on chain (never deployed)

v238 block 4,936,550 Internal re-bind

v266–v272 · runtime versions skipped on chain (never deployed)

v273 block 5,659,032 Internal re-bind

v275–v275 · runtime versions skipped on chain (never deployed)

v276 block 5,781,672 Internal re-bind

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

v290 block 5,947,548 Internal re-bind

v307–v314 · runtime versions skipped on chain (never deployed)

v315 block 6,414,634 Internal re-bind

v316–v319 · runtime versions skipped on chain (never deployed)

v320 block 6,523,566 Internal re-bind

v327–v333 · runtime versions skipped on chain (never deployed)

v334 block 6,811,690 Internal re-bind

v353–v360 · runtime versions skipped on chain (never deployed)

v361 block 7,063,679 Internal re-bind

v386–v390 · runtime versions skipped on chain (never deployed)

v391 block 7,782,857 Internal re-bind

v394–v400 · runtime versions skipped on chain (never deployed)

v401 block 8,036,576 Internal re-bind Current

Runtime Info

View Source

Pallet: Commitments
Storage Kind: Map
First Version: v140
Current Version: v411

Back to Commitments Storage