Payments Giant Qiwi is Building a Blockchain Replacement for its Core DatabaseRussian payments firm Qiwi is currently designing its own proprietary blockchain in an effort to replace its central payments processing database.
Called the "Qiwi blockchain system", the company’s development effort focuses on how its core database of customer transactions could be reimagined to reduce costs.
Qiwi is one of the largest payment service providers in the Commonwealth of Independent States (CIS) region, with more than 16.1 million digital wallet users and 62 million transacting customers per month.
http://www.coindesk.com/qiwi-replace-payments-processor-blockchain/