In the following example, lr_start_transaction starts a transaction whose purpose is to measure the time it takes to perform a deposit to a bank server. Once the server API call is completed and returns a value to the status variable, the transaction is complete.
/* Notify that a transaction is starting */
/* Server API call */
status = bank_deposit(50);
/* End transaction with operation result - pass or fail */
if (status == 0) lr_end_transaction("deposit", LR_PASS); else lr_end_transaction("deposit", LR_FAIL);