PromiseDapp.js

pragma solidity ^0.5.0;

contract PromiseDapp{
uint public totalPromises;
struct Promise
{
address party1;
address party2;
string promises;
}
Promise [] public pro;
mapping(uint=>Promise) public ProList;
function storePromises(address _party1,address _party2,string memory _promises)public returns(uint)
{
Promise memory newPromise = Promise({
party1:_party1,
party2:_party2,
promises:_promises
});
pro.push(newPromise);
ProList[totalPromises++]=newPromise;
return totalPromises;
}
function displayPromise(uint proNum) view public returns(string memory)
{
address p1=ProList[proNum].party1;
address p2=ProList[proNum].party2;
require(msg.sender==p1 || msg.sender==p2);
return ProList[proNum].promises;
}