Transaction processing device, transaction processing method, and program recording medium

A transaction processing system comprising:

• an enclosed store region including an entrance having a check-in code symbol presented thereat and an exit having a check-out code symbol presented thereat;
• a customer terminal comprising:
• a camera;
• and
• a first processor configured to:
• transmit a check-in request including a customer terminal identifier of the customer terminal upon determining that a code symbol captured by the camera is the check-in code symbol;
• and
• transmit a check-out request including the customer terminal identifier upon determining that the code symbol captured by the camera is the check-out code symbol;
• a store terminal;
• and
• a mobile controller comprising:
• an communication interface;
• and
• a second processor configured to:
• in response to the check-in request, perform a check-in process to generate a transaction-specific data record in association with the customer terminal identifier;
• in response to a first product code from the customer terminal in a state in which the customer terminal is checked in, perform a first product registration process of registering a first transaction content related to a first product identified by the first product code in association with the transaction-specific data record;
• in response to a link request from the customer terminal or the store terminal in the state in which the customer terminal is checked in, perform a link process of generating a linkage data record in which the customer terminal identifier is associated with a store terminal identifier of the store terminal;
• in response to a second product code from the store terminal in a state in which the customer terminal is checked in and the customer terminal identifier is associated with the store terminal identifier, perform a second product registration process of registering a second transaction content related to a second product identified by the second product code in association with the transaction-specific data record;
• and
• in response to the check-out request, perform a check-out process to clear the transaction-specific data record.