blockchain technology to integrate into my mobile app www.betaremit.com

I want something like this. The payment gateway will be blockchain. We integrate wechatpay API which will be used to receive payments from China. For a start people will only be able to send money from Cameroon to China. Once someone starts a money transfer inside the money transfer app he sees what the recipient will get but in the blockchain gateway, he is buying our tokens and each token will have the same value as 1 euro. Once he has completed his transfer, we tell him how much we will send in local currency. So to receive the funds, we will connect the blockchain api to the mobile app. To send the funds to the recipient country, we have to bank api connected to the blockchain. One for the our company based in France were our fees will be sent and the other to a local bank were the recipients money will be sent for him to withdraw. All these need to be done instantly So the blockchain serves as our gateway to receive and send payments using our own private stable coin worth 1 EURO