The TrnAdd (Transaction Add) API can be used wit ha debit transaction code to increase the balance of an account. I will note that if this is an integral part of your integration (not just done for testing purposes), you will need to consider creating balanced transactions in the core.
Step 1: First TrnAdd request to affect the customer’s account. This affects the Customer’s account and moves money to the applications settlement GL account.
Step 2: Second TrnAdd request to move money from the settlement GL account. Each FI will have a different GL account that is used for their settlement account and will need to be gathered from the FI.
Step 3: Third TrnAdd request to move money into the GL account used for tracking with the TPV application. Each FI will have a different GL account that is used for their settlement account and will need to be gathered from the FI.