Transactions

batch

Execute several intents atomically in one extrinsic (all-or-nothing).

Wraps the child calls in Utility.batch_all: they run in order and if any one fails the whole extrinsic reverts, so there is never a partially-applied result. Use it for multi-step operations that must land together (e.g. move funds then act on them) instead of submitting the steps separately and risking a half-done state. All children must share one signer — an extrinsic has a single signature — and batches cannot contain other batches. Spend limits and policy checks aggregate across every child, and the transaction plan lists each child's effects.

Signer	Pallet	Wraps
`coldkey`	Utility	`Utility.batch_all`

Parameters

Parameter	Type	Required	Description
`intents`	array	yes	The calls to execute, in order, as a JSON list of objects {"op": <intent name>, ...args}. At least one; all must share a signer; batches cannot nest.

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 batch \
  --intents <a,b,c> --dry-run
btcli tx batch \
  --intents <a,b,c> -w my_coldkey

Python

import bittensor as sub
from bittensor.wallet import Wallet

wallet = Wallet(name="my_coldkey", hotkey="my_hotkey")
intent = sub.Batch(intents=[...])

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