blockheaderweb3-community / cairo-bootcamp-23 Goto Github PK

fn transfer_from(
            ref self: ContractState,
            sender: ContractAddress,
            recipient: ContractAddress,
            amount: u256
        ) {
            let caller = get_caller_address();
            let my_allowance = self.allowances.read((sender, recipient));
            assert(my_allowance <= amount, 'Amount Not Allowed');
            self
                .spend_allowance(
                    sender, caller, amount
                ); //responsible for deduction of the amount allowed to spend
            self.transfer_helper(sender, recipient, amount);
        }