deduct_balance
Removes a certain amount of money from an account. It does NOT update total supply, extra care is needed to either decrease it or add the assets to another account.
Only supposed to be called internally, use functions like burn or transfer whenever possible.
Throws "INSUFFICIENT BALANCE" if the amount to be removed is higher than the amount the account holds, or if there's no balance connected to the account and asset given, which means the account has 0 of this asset.
Can only be called from an operation.
Return
the final balance of the account
Parameters
account
the account from which the amount is to be removed
asset
the asset to remove from the account
amount
the amount to remove