Paper Title
SDNMESH-Blockchain Based Offline Transaction

Abstract
The offline payment infrastructure is not efficient. The payment can only be made via the Internet or mobile network. Payment without the internet/mobile network was difficult, primarily when natural disasters and calamities occurred. Natural disasters cause significant harm to life, property, resources, wildlife, environmental damage, economic disruption, and communication. It is very important to hear, which is not always possible at the time of natural calamities due to the failure of the internet/mobile network. Also, the transactions get limited or stopped. In view of the above, we propose SDNMesh-Blockchain technology to connect users through BlueTooth/wifi/hotspot as a medium/connection to establish a payment network through which transactions can be done without an internet/mobile network. SDNMesh-Blockchain is a payment gateway without an internet/mobile network, a hybrid of Mesh Network, SDN(Software-Defined network), and Blockchain. Keywords – SDN (Software Defined Network), Mesh Net- work, and Blockchain