Algorithm 3: Verify Node Before Joining it Into Network

//This code checks if a node has a card identity //It is a Boolean returning value that returns true if the node has a card or returns false when the node does not have a card Begin if ((ecrecover(hash, v, _r, _s) == masterAddr) || (ecrecover(hash, v + 1, _r, _s) ==masterAddr))    then     Return true;    else    Return false.    End;