Transactions

start-call

Activate a subnet (subtoken trading, epochs) as its owner.

Flips a freshly registered subnet from inactive to active: the subnet token becomes tradable and alpha emission into the subnet's epochs begins. It does not enable the subnet's share of TAO emission — that additionally requires the root-gated emission-enabled flag, which only root can set. Owner-only, callable once per subnet, and only after the chain's minimum delay since the subnet was registered — calling too early fails. Until this is called the subnet earns nothing, so run it as soon as the delay allows.

Signer	Pallet	Wraps
`coldkey`	SubtensorModule	`SubtensorModule.start_call`

Parameters

Parameter	Type	Required	Description
`netuid`	integer	yes	Subnet to activate; the signer must be its owner.

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 start-call \
  --netuid <int> --dry-run
btcli tx start-call \
  --netuid <int> -w my_coldkey

Python

import bittensor as sub
from bittensor.wallet import Wallet

wallet = Wallet(name="my_coldkey", hotkey="my_hotkey")
intent = sub.StartCall(netuid=1)

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