Queried by: validatorsanalyticsdevelopers
The Big Picture
A portion of all emissions flows to the root network. This proportion determines how much goes to root vs subnets.
Use Cases
- Understand emission distribution
- Calculate root network rewards
- Build emission calculators
From Chain Metadata
MAP ( netuid ) --> root_prop | The subnet root proportion.
Purpose & Usage
Purpose
Control share of emissions going to root network.
Common Query Patterns
- Single value query
Query Keys
| # | Name | Type | Description |
|---|---|---|---|
| 1 | netuid | u16 | netuid (u16, hashed key component) |
Stored Value
root_prop (FixedU128)
Decoding the value
FixedU128 (Q64.64 fixed-point)FixedU128 encodes as Q64.64: raw bits divided by 2^64 gives the rational. Magnitude > 0 means non-zero.
const fraction = Number(value as bigint) / 2 ** 64;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 RootProp storage
const netuid = 1;
const result = await api.query.SubtensorModule.RootProp.getValue(netuid);
console.log("RootProp:", result);Version History
v365 block 7,135,419 Added
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
- SubtensorModule
- Storage Kind
- Map
- First Version
- v365
- Current Version
- v411