Errors/Chain errors
NotEnoughBalanceToPaySwapHotKey
Fund the signing account or reduce the amount; check with `btcli wallet balance`
The coldkey's free TAO balance is below the hotkey swap cost (a per-subnet cost applies when swapping on a single netuid). Check btcli wallet balance against the key swap cost and fund the coldkey before retrying.
Declared by the SubtensorModule pallet; it classifies to the semantic code insufficient_balance.
Remediation
Fund the signing account or reduce the amount; check with btcli wallet balance
The same explanation is available in the terminal: btcli explain NotEnoughBalanceToPaySwapHotKey.