Transactions

stake-burn

Buy back / burn stake via the stake-burn extrinsic.

Spends TAO from the signing coldkey to buy the subnet's alpha and burn it, reducing alpha supply (a buyback-and-burn) rather than adding to the signer's stake. The TAO is spent permanently — nothing lands in your stake, so this is not an investment call; use a regular add-stake intent to acquire a position. Fails on the root subnet (CannotBurnOrRecycleOnRootSubnet). The chain accepts an optional limit (omitted = market order), but this intent always requires limit_price and executes all-or-nothing: the swap fails instead of partially filling at a worse rate. Counts against a configured spend cap.

Signer	Pallet	Wraps
`coldkey`	SubtensorModule	`SubtensorModule.add_stake_burn`

Parameters

Parameter	Type	Required	Description
`netuid`	integer	yes	Subnet whose alpha is bought and burned.
`amount_tao`	number \| `"all"`	yes	Spent from the coldkey to buy alpha that is then burned.
`limit_price`	integer	yes	Worst acceptable price in rao per alpha; the call fails rather than filling beyond it.
`hotkey_ss58`	string	no	Hotkey the burn is routed through; defaults to the wallet's hotkey.

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 stake-burn \
  --netuid <int> \
  --amount-tao <amount|all> \
  --limit-price <int> --dry-run
btcli tx stake-burn \
  --netuid <int> \
  --amount-tao <amount|all> \
  --limit-price <int> -w my_coldkey

Python

import bittensor as sub
from bittensor.wallet import Wallet

wallet = Wallet(name="my_coldkey", hotkey="my_hotkey")
intent = sub.StakeBurn(netuid=1, amount_tao=1.0, limit_price=0)

async with sub.Client("finney") as client:
    plan = await client.plan(intent, wallet)   # fee, effects, policy — no submission
    result = await client.execute(intent, wallet)
    if not result.success:
        print(result.error.code, result.error.remediation)

Or build it by op name, as an agent would:

await client.execute_tool("stake_burn", {...}, wallet)