Gas key is like an access key, except it stores a balance separately, and transactions signed with it deduct their cost from the gas key balance instead of the account balance.
The balance of the gas key.
The number of nonces this gas key has.
Defines the permissions for this gas key. If this is a FunctionCallPermission, the allowance must be None (unlimited).
FunctionCallPermission
Gas key is like an access key, except it stores a balance separately, and transactions signed with it deduct their cost from the gas key balance instead of the account balance.