root-register

Joins the hotkey to the root network, the TAO staking pool (netuid 0 has no miners and no alpha; validators register here to receive root stake). Admission is burn-based, like subnet registration: the coldkey pays the root burn price (recycled out of issuance, demand-priced — each registration bumps it and it decays back toward the floor). No prior stake is required, but root slots are limited: joining a full root network evicts the member with the least stake, so a seat is only held by keeping stake behind the hotkey. Root registrations are also capped per block (max_registrations_per_block) and per interval (three times target_registrations_per_interval); hitting either cap fails until the window passes. Use burned_register for ordinary subnets.

Parameters

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 subnets register --netuid 0 --dry-run
btcli subnets register --netuid 0 -w my_coldkey

Python

import bittensor as bt
from bittensor.wallet import Wallet

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

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

On-chain implementation

SubtensorModule.root_register — pallets/subtensor/src/macros/dispatches.rs#L834:

#[pallet::call_index(62)]
#[pallet::weight(<T as crate::pallet::Config>::WeightInfo::root_register())]
pub fn root_register(origin: OriginFor<T>, hotkey: T::AccountId) -> DispatchResult {
    Self::do_root_register(origin, hotkey)
}

Delegates to do_root_register.

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