set_tempo
Call v423 → v424, v432 → current #139Deprecated compatibility entry point retained for call -index stability.
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This diagram shows the call execution flow: starting with set_tempo, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
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From Chain Metadata
Deprecated compatibility entry point retained for call-index stability. This call charges a fee, returns success, and does not modify state. Use `AdminUtils::sudo_set_tempo` to change subnet tempo.
Migration Notes
v424 v432 Breaking
netuid changed from u16 to NetUid
Update decoders: SCALE encoding is positional, so any signature change (added, removed, or type-changed fields, or storage shape changes) shifts byte offsets and existing decoders will misparse this item. Re-derive types from the new metadata.
Input Parameters
Permissions
Origin
Unknown
Required Role
Permission data inferred from metadata. May be incomplete.
Requirements
- Caller authorized to make changes
Effects
Postconditions
- Value successfully updated
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);
// Build set_tempo call (typed, named args)
const netuid = 1;
const tempo = 0;
const tx = api.tx.SubtensorModule.set_tempo({
netuid,
tempo,
});Version History
v423 block 8,486,593 2 args
v432 block 8,636,190 2 args Current
Runtime Info
View Source- Pallet Index
- 7
- Call Index
- 139
- First Version
- v423
- Current Version
- v472