I need some help to perform a couple checks in my Java Spring Boot app

ONLY RESPOND IF YOU CAN START RIGHT AWAY. The application already exists I need help for two things; my path needs to be changed in Postman. And a couple checks needs to be performed in the service layer: 1. Needs to have enough balance (Balance Account model) 2. Cannot directly transfer to a savings account that is not of the same customer (Account to/from) 3. A check needs to be done to see if the balance is above - 1200 (called absolute limit) (balanceLimit in Account Model) 4. A transaction limit per day needs to set of 100 (Day limit) (getTransactionDayLimit in Account Model) 5. A user can only create 200 transactions per day (transaction limit) (getTransactionAmountLimit in Account Model) 6. A Customer and employee can both create a transaction, this because a user can go to the bank to get help (enum check) 7. Account to cannot be the same as account from. Can’t be identical. 8. Amount needs to be higher than 0. 9. Cannot transfer 0. 10. Return object 11. Check if account_to exist. And a couple other checks....