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create-pure-proxy

Create a pure proxy: a fresh keyless account controlled via delegation.

The chain derives a new address from the signer, proxy_type, index, and the creation block. Nobody holds its private key — the spawner controls it purely through the proxy relationship, which makes it useful as a disposable or role-scoped account (e.g. a Staking-only treasury). Record the creation block and extrinsic index (shown in the result): kill_pure_proxy needs them to close the account later. Losing the spawner key means losing the pure proxy and anything it holds.

Signer	Origin	Pallet	Wraps
`coldkey`	signed account (pallet role may apply)	Proxy	`Proxy.create_pure`, `Proxy.create_protected_pure`, `Proxy.create_safe_pure`

Parameters

Parameter	Type	Required	Description
`proxy_type`	string	no	Scope of calls the delegation covers. One of: Any, Owner, NonCritical, NonTransfer, Senate, NonFungible, Triumvirate, Governance, Staking, Registration, Transfer, SmallTransfer, RootWeights, ChildKeys, SudoUncheckedSetCode, SwapHotkey, SubnetLeaseBeneficiary, RootClaim, BasketTrading, Validate, Weights, Lock, GammaSpend. Triumvirate, Senate, Governance, and RootWeights are deprecated on the current runtime: they deny all calls, so a proxy of those types can dispatch nothing. Prefer the narrowest type that covers your use; Any can do everything the account can, including transfers.
`delay`	integer	no	Announcement delay in blocks: the delegate must announce each call and wait this long before executing it, giving you time to veto. 0 executes immediately.
`index`	integer	no	Disambiguator so one signer can create several pure proxies in one block; also part of the derived address. Keep 0 unless batching.
`account_mode`	string	no	Account derivation: legacy or safe; MS wallets default to safe.

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 create-pure-proxy --dry-run
btcli tx create-pure-proxy -w my_coldkey

Python

import bittensor as bt
from bittensor.wallet import Wallet

wallet = Wallet(name="my_coldkey", hotkey="my_hotkey")
intent = bt.CreatePureProxy()

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("create_pure_proxy", {...}, wallet)

On-chain implementation

Proxy.create_pure — pallets/proxy/src/lib.rs#L403:

#[pallet::call_index(4)]
#[pallet::weight(T::WeightInfo::create_pure(T::MaxProxies::get()).saturating_add(T::AccountPolicy::weight()))]
pub fn create_pure(
    origin: OriginFor<T>,
    proxy_type: T::ProxyType,
    delay: BlockNumberFor<T>,
    index: u16,
) -> DispatchResult {
    let who = ensure_signed(origin)?;
    ensure!(
        !T::AccountPolicy::requires_protection(&who),
        Error::<T>::AccountPolicyViolation
    );
    Self::do_create_pure(who, proxy_type, delay, index, false, false)
}

Proxy.create_protected_pure — pallets/proxy/src/lib.rs#L779:

#[pallet::call_index(12)]
#[pallet::weight(T::WeightInfo::create_protected_pure().saturating_add(T::DbWeight::get().reads(1)))]
#[frame_support::transactional]
pub fn create_protected_pure(
    origin: OriginFor<T>,
    proxy_type: T::ProxyType,
    delay: BlockNumberFor<T>,
    index: u16,
) -> DispatchResult {
    let who = ensure_signed(origin)?;
    ensure!(
        T::AccountPolicy::requires_protection(&who),
        Error::<T>::AccountPolicyViolation
    );
    Self::do_create_pure(who, proxy_type, delay, index, true, false)
}

Proxy.create_safe_pure — pallets/proxy/src/lib.rs#L800:

#[pallet::call_index(13)]
#[pallet::weight(T::WeightInfo::create_pure(T::MaxProxies::get())
    .saturating_add(T::SafeDerivationWeight::get()))]
pub fn create_safe_pure(
    origin: OriginFor<T>,
    proxy_type: T::ProxyType,
    delay: BlockNumberFor<T>,
    index: u16,
) -> DispatchResult {
    let who = ensure_signed(origin)?;
    Self::do_create_pure(who, proxy_type, delay, index, false, true)
}

Every file is browsable under /code exactly as built into the runtime, or as plain text under /code/raw/<path> (index: /code/index.json).