Transactions

update-crowdloan-end

Update the end block of a non-finalized crowdloan (creator only).

Extends or shortens the contribution window. The new end is re-validated against the current block: it must be in the future and fall within the chain's minimum/maximum crowdloan duration (roughly 7 to 60 days) measured from now. Only the creator may change it, and only while the loan has not been finalized.

Signer	Origin	Pallet	Wraps
`coldkey`	signed account (pallet role may apply)	Crowdloan	`Crowdloan.update_end`

Parameters

Parameter	Type	Required	Description
`crowdloan_id`	integer	yes	Identifier of the crowdloan, assigned when it was created.
`new_end`	integer	yes	New block number at which the crowdloan stops accepting contributions. Must be in the future and roughly 7-60 days from the current block.

Address parameters (--hotkey, --coldkey, --dest, ...) accept a raw ss58 address, an address-book or proxy-book name, or a local wallet/hotkey name.

CLI

Preview with --dry-run (shows fee, effects, and policy result without submitting), then submit:

btcli tx update-crowdloan-end \
  --crowdloan-id <int> \
  --new-end <int> --dry-run
btcli tx update-crowdloan-end \
  --crowdloan-id <int> \
  --new-end <int> -w my_coldkey

Python

import bittensor as bt
from bittensor.wallet import Wallet

wallet = Wallet(name="my_coldkey", hotkey="my_hotkey")
intent = bt.UpdateCrowdloanEnd(crowdloan_id=0, new_end=0)

sub = bt.Subtensor()
plan = sub.plan(intent, wallet)   # fee, effects, policy — no submission
result = sub.execute(intent, wallet)
if not result.success:
    print(result.error.code, result.error.remediation)

(bt.Subtensor is also the async client — async with bt.Subtensor() as client: — see The client.) Or build the intent by op name, as an agent would:

result = sub.execute_tool("update_crowdloan_end", {...}, wallet)

On-chain implementation

Crowdloan.update_end — pallets/crowdloan/src/lib.rs#L863:

#[pallet::call_index(7)]
#[pallet::weight(T::WeightInfo::update_end())]
pub fn update_end(
    origin: OriginFor<T>,
    #[pallet::compact] crowdloan_id: CrowdloanId,
    #[pallet::compact] new_end: BlockNumberFor<T>,
) -> DispatchResult {
    let who = ensure_signed(origin)?;
    let now = frame_system::Pallet::<T>::block_number();

    let mut crowdloan = Self::ensure_crowdloan_exists(crowdloan_id)?;
    ensure!(!crowdloan.finalized, Error::<T>::AlreadyFinalized);

    // Only the creator can update the min contribution.
    ensure!(who == crowdloan.creator, Error::<T>::InvalidOrigin);

    Self::ensure_valid_end(now, new_end)?;

    crowdloan.end = new_end;
    Crowdloans::<T>::insert(crowdloan_id, &crowdloan);

    Self::deposit_event(Event::<T>::EndUpdated {
        crowdloan_id,
        new_end,
    });
    Ok(())
}

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