pub const PER_EMPTY_ACCOUNT_COST: u64 = 25000;
A gas refund for EIP7702 transactions if the authority account already exists in the trie.
The refund is PER_EMPTY_ACCOUNT_COST - PER_AUTH_BASE_COST.
PER_EMPTY_ACCOUNT_COST - PER_AUTH_BASE_COST
See also EIP-7702.