build app that can link a mobile banking to paypal

Step1 Buying papal USD process Retrieve sucessful payment necessary secured SMS info sent from the mobile banking network ,after validation from the buyer, to the seller's phone and further a transaction from the selle's Paypal account( OUR APP) to the buyer's Paypal account. Step 2 Buying local currency (XOF) on mobile network bank process Furthering sucessful payment made from a Buyer on OUR APP , to a mobile system that can comunicate with the seller's phone's mobile banking account to validate a deserved amount ,so that the mobile network can sucessfully send the amount to the buyer's MOBILE BANKING ACOUNT . Local currency Deposits and Withdraws are made at the mobile network service, as well as are concerned the seller and buyer. This business purpose is gaining transaction fee through, buying and selling Paypal USD in conduction with a local Mobile banking system, in a regional Curency ,meaning XOF. (FCFA)