extend

Call v154 → current #2

Extend safe-mode duration permissionlessly by reserving a deposit.

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Used by: validatorsdevelopers

The Big Picture

Sometimes the initial safe-mode duration isn't enough. Anyone can extend it by putting up another deposit. Extensions accumulate on top of existing duration.

Use Cases

  • Extend protection while investigation continues
  • Maintain safe-mode when fix isn't ready before expiration

From Chain Metadata

Extend the safe-mode permissionlessly for [`Config::ExtendDuration`] blocks. This accumulates on top of the current remaining duration. Reserves [`Config::ExtendDepositAmount`] from the caller's account. Emits an [`Event::Extended`] event on success. Errors with [`Error::Exited`] if the safe-mode is entered. Errors with [`Error::NotConfigured`] if the deposit amount is `None`. This may be called by any signed origin with [`Config::ExtendDepositAmount`] free currency to reserve. This call can be disabled for all origins by configuring [`Config::ExtendDepositAmount`] to `None`.

This call takes no parameters.

Permissions

Origin
Unknown
Required Role
Any

Permission data inferred from metadata. May be incomplete.

Requirements

  • Safe-mode is currently entered
  • Caller has sufficient free balance for the extend deposit
  • ExtendDepositAmount is configured (not None)

Effects

Events Emitted

ExtendedDepositPlaced

Storage Modified

EnteredUntilDeposits

Postconditions

  • Safe-mode extended by ExtendDuration blocks
  • EnteredUntil storage updated
  • Additional deposit reserved

Side Effects

  • New deposit tracked separately in Deposits storage

Code Examples

import { ApiPromise, WsProvider } from "@polkadot/api";
import { stringCamelCase } from "@polkadot/util";

const provider = new WsProvider("wss://entrypoint-finney.opentensor.ai:443");
const api = await ApiPromise.create({ provider });

// Build extend call (no parameters)
const call = api.tx[stringCamelCase("SafeMode")][stringCamelCase("extend")]();

Runtime Info

Pallet Index
20
Call Index
2
First Version
v154
Current Version
v393
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