A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which, when executed by a server system of a social networking platform with one or more processors, cause the server system to perform operations comprising:
- enabling real-time messaging between a plurality of users, wherein each of the plurality of users is a registered user of the social networking platform and is associated with a respective user account identifier in the social networking platform at a corresponding mobile phone;
- performing, via the social networking platform, a plurality of operations including:
- obtaining transaction information for a plurality of payment transactions executed on two or more online payment platforms, the plurality of payment transactions including at least a first payment transaction made through the social networking platform and a second payment transaction made through an in-app purchase platform via a mobile application running on a mobile terminal through the social networking platform, wherein obtaining the transaction information includes:
- for each user account identifier of the plurality of user account identifiers associated with the plurality of users registered on the social networking platform:
- proactively crawling one or more credit card providers' websites to gather payment transactions initiated with cards that are linked to the user account identifier at the server of the social networking platform;
- storing in a database associated with the social networking platform a plurality of transaction information entries for the plurality of payment transactions;
- receiving, from a first mobile phone, a transaction history request having a predefined time window from a first registered user of the social networking platform, the first registered user having a first user account identifier;
- and
- in response to the transaction history request:
- obtaining, from the stored plurality of transaction information entries according to the first user account identifier, two or more transaction information entries associated with the first user at the first mobile phone, the two or more transaction information entries including a first transaction information entry of the two or more transaction information entries associated with a first transaction executed on the social networking platform by the first mobile phone and a second transaction information entry of the two or more transaction information entries associated with a second transaction executed on the in-app purchase platform by the first mobile phone, wherein the social networking platform is distinct from the in-app purchase platform;
- displaying, on the first mobile phone associated with the first user, an instant messaging interface of the social networking platform including the transaction history request in form of a first instant message from the first user;
- providing, in form of a second instant message to the first user, transaction history information to the first user through the instant messaging interface of the social networking platform, the transaction history information including the two or more transaction information entries associated with the first user;
- and
- sending an email with the transaction history information to an email address associated with the first user.