SubnetTaoInEmission

Storage Map Poll per block v233 → v411

TAO amount emitted into each subnet on the LAST block .

Queried by: analyticsdevelopers

The Big Picture

TAO flows into subnets via emissions. This tracks the per-block rate of TAO entering each subnet from the emission system. To compute period totals, integrate across blocks.

Use Cases

Track emission rates
Research subnet economics
Build emission dashboards

From Chain Metadata

MAP ( netuid ) --> tao_in_emission | Returns the amount of tao emitted into this subent on the last block.

Purpose & Usage

Purpose

Track per-block TAO inflow from emissions. Value is overwritten every block — represents the most recent block emission, not a cumulative total.

Common Query Patterns

Query by netuid
Subscribe per-block for inflow tracking

Query Keys

#	Name	Type	Description
1	netuid	u16	netuid (u16, hashed key component)

Stored Value

u64

tao_in_emission (u64)

RAO -> TAO (/ 10^9)

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 SubnetTaoInEmission storage
const netuid = 1;

const result = await api.query.SubtensorModule.SubnetTaoInEmission.getValue(netuid);
console.log("SubnetTaoInEmission:", result);

Version History

Version:

v233 block 4,920,350 Added

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

v290 block 5,947,548 Internal re-bind

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

v361 block 7,063,679 Internal re-bind Current

Runtime Info

View Source

Pallet: SubtensorModule
Storage Kind: Map
First Version: v233
Current Version: v411
Update Pattern: overwritten-at-event (every block (on_initialize))

Back to SubtensorModule Storage