Transactions

update-symbol

Update a subnet's symbol (from the chain's fixed catalog).

Cosmetic call for the subnet owner (or root): changes the short ticker shown for the subnet's alpha token in wallets, explorers, and CLIs. Symbols are not arbitrary strings — the chain keeps a fixed catalog of roughly 439 predefined symbols, and anything outside it is rejected with SymbolDoesNotExist. A symbol already taken by another subnet is rejected with SymbolAlreadyInUse. No economic effect — balances, stake, and emissions are untouched.

Signer	Pallet	Wraps
`coldkey`	SubtensorModule	`SubtensorModule.update_symbol`

Parameters

Parameter	Type	Required	Description
`netuid`	integer	yes	Subnet whose symbol to change; the signer must be its owner.
`symbol`	string	yes	New token symbol; must be one of the chain's predefined symbols and not in use by another subnet.

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 update-symbol \
  --netuid <int> \
  --symbol <value> --dry-run
btcli tx update-symbol \
  --netuid <int> \
  --symbol <value> -w my_coldkey

Python

import bittensor as sub
from bittensor.wallet import Wallet

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

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