Algorithm 3: Update patient prescription

Input: patientID, doctorID, prescription Output: Patient record update with new prescription pragma solidity ^0.5.12;  mapping(address => address) authorizedDoctor;  if( isDoctorAuthorized(patientID))  {   Update the prescription in the corresponding patient’s record;   transaction is recorded in the blockchain;  }  else   Revert the transaction;  function public isDoctorAuthorized(address patientID) public view return (bool display)  {    if(msg.sender == authorizedDoctor(patientID))     return true;    else     return false;  }