AlphaMapLastKey
Storage Plain v334 → v411 Changed in v411Last key used for Alpha storage map iteration.
Explore chainQueried by: developers
The Big Picture
The Alpha storage map can be very large. This marker helps with pagination and efficient iteration over all alpha stake positions.
Use Cases
- Resume Alpha map iteration from last position
- Build paginated Alpha queries
From Chain Metadata
Contains last Alpha storage map key to iterate (check first)
Purpose & Usage
Purpose
Supports efficient iteration over the Alpha storage map.
Common Query Patterns
- Single value query
- Used internally for pagination
Stored Value
value (Option)
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 AlphaMapLastKey storage (no keys - plain value)
const result = await api.query.SubtensorModule.AlphaMapLastKey.getValue();
console.log("AlphaMapLastKey:", result);Version History
v334 block 6,811,690 Added
v353–v360 · runtime versions skipped on chain (never deployed)
v361 block 7,063,679 Internal re-bind
v363–v364 · runtime versions skipped on chain (never deployed)
v365 block 7,135,419 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
v403–v410 · runtime versions skipped on chain (never deployed)
v411 block 8,283,784 Internal re-bind Current
Runtime Info
View Source- Pallet
- SubtensorModule
- Storage Kind
- Plain
- First Version
- v334
- Current Version
- v411