sudo_set_default_take
Call v138 → current #1Sets the default delegate take percentage for new validators.
View calls on chainCall Workflow
This diagram shows the call execution flow: starting with sudo_set_default_take, passing through validation
(signature, nonce, mortality, fee payment), then pre-dispatch checks, followed by dispatch and modifies storage: SubtensorModule.DefaultTake, and finally post-dispatch where ExtrinsicSuccess is emitted and fees are settled.
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
Click items to navigate. Pan and zoom to explore.
Used by: subnet owners
The Big Picture
Take is the percentage delegates keep from staker emissions. This sets the default for new validators; existing ones keep their configured rate.
Use Cases
- Adjusting default delegation economics
- Network-wide take policy changes
Input Parameters
| # | Name | Type | Description |
|---|---|---|---|
| 0 | default_take | u16 | default_take (u16) |
Permissions
Origin
Root
Required Role
Requirements
- Caller is root account
- Take value is within valid bounds
Effects
Storage Modified
Postconditions
- DefaultTake updated
- New validators use this default
Side Effects
- Does not affect existing validator take rates
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 sudo_set_default_take call (typed, named args)
const default_take = 0;
const tx = api.tx.AdminUtils.sudo_set_default_take({
default_take,
});Runtime Info
View Source- Pallet Index
- 19
- Call Index
- 1
- First Version
- v138
- Current Version
- v411