NewColdKeyIsHotkey
Error v195 → v202, v205 → v212, v216 → v216, v217 → v219, v233 → v315, v320 → v326, v334 → v377, v385 → v393, v401 → current 7.70The destination coldkey address is already used as a hotkey .
Why This Error Exists
Bittensor maintains separation between coldkeys (which hold funds and stake) and hotkeys (which do network work). An address can be a coldkey OR a hotkey, but not both. This prevents confusion and potential security issues from dual-use addresses where funds and operational keys are mixed.
Deep Dive
The Owner storage maps hotkey -> coldkey (the coldkey that owns each hotkey). If Owner(address) returns a value, that address is already used as a hotkey. The chain prevents swapping to such an address because it would create an ambiguous situation where the same key serves two purposes.
Debugging Example
You call schedule_swap_coldkey(old=5Old..., new=5NewKey...). Error: NewColdKeyIsHotkey. Query Owner(5NewKey...) - returns 5SomeOwner.... This means 5NewKey... is already registered as a hotkey. Solution: Generate a fresh keypair and use that new address as your swap destination instead.
Prevention Tips
- Before swapping, query Owner(destination_address) - should return None
- Use dedicated coldkey addresses, never repurpose hotkeys as coldkeys
- Label your keys clearly to avoid confusion between cold and hot
From Chain Metadata
New coldkey is hotkey
What This Means
The destination coldkey address is already used as a hotkey.
Common Causes
- Trying to swap to an address that's a registered hotkey
- Mixed up coldkey and hotkey addresses
How to Fix
- Use a different destination address
- Generate a new coldkey that isn't used as a hotkey
Storage to Check
Thrown By
Version History
Runtime Info
- Pallet Index
- 7
- Error Index
- 70
- Error Code
- 7.70
- Runtime Version
- v411