GoodnessEzeokafor

sudo apt remove gstreamer1.0-vaapi

GoodnessEzeokafor

• launch an ec2 instance
• visit security
• click on launch wizard 1
• edit security group and add an inbound rule
• select type http with port 80 and select source as anywhere (0.0.0.0/0)

CONNECT TO INSTANCE

• open your computer's terminal
• locate your instance private key
• connect using this command sudo ssh -i "privateKey.pem" instance.compute-1.amazonaws.com

GoodnessEzeokafor

SSH SETUP

• copy and paste ssh-keygen on your local machine

initial server setup/user setup

• ssh root@your_server_ip
• adduser sammy
• usermod -aG sudo sammy - setup root privileges for the user
• ufw app list - setup a basic filewall
• ufw allow OpenSSH - setup a basic filewall
• ufw enable - setup a basic filewall

GoodnessEzeokafor

SSH SETUP

• copy and paste ssh-keygen on your local machine

initial server setup/user setup

• ssh root@your_server_ip
• adduser sammy
• usermod -aG sudo sammy - setup root privileges for the user
• ufw app list - setup a basic filewall
• ufw allow OpenSSH - setup a basic filewall
• ufw enable - setup a basic filewall

GoodnessEzeokafor

// pragma solidity ^0.5.16;
pragma solidity >=0.4.22 <0.9.0;
/**
NOTE VERSION SPECIFIED SHOULD BE THE SAME SPECIFIED IN truffle-config.js
 */
interface CourierInterface{
function startItemTranpost(string calldata _sku) external;    
function getItemStatus(uint256 itemD) external view returns(string memory status);
function getItemLocation(uint256 itemID) external view returns(string memory location);
}

GoodnessEzeokafor

const BCShopCourier = artifacts.require('./BCShopCourier.sol')

require('chai')
    .use(require('chai-as-promised'))
    .should()

    contract('BCShopCourier', ([deployer,account1,account2,account3]) => {
        let contract        
        before(async ()=>{
            contract = await BCShopCourier.deployed()       

GoodnessEzeokafor

pragma solidity >=0.4.22 <0.9.0;
import './BCShopCourier.sol';

interface SellerInterface{
    function addSale(uint256 productID) external;
    function buyerReceiveProduct(uint256 saleID)external;
    function getProductPrice(uint256 productID) external view returns(uint256 price);
    function getSaleStatus(uint256 saleID) external view returns(string memory status);
}

GoodnessEzeokafor

const BCShopCourier = artifacts.require("BCShopCourier");
const BCShopSeller = artifacts.require("BCShopSeller");
const BCShopBuyer = artifacts.require("BCShopSeller");

module.exports = async(deployer) => {
  let deployBCShopCourier = await deployer.deploy(BCShopCourier)
                        .then(async(courier) => {
                          // console.log(data)
                            let deployBCShopSeller = await deployer.deploy(BCShopSeller, courier.address)
                                                                    .then(async(seller) => {

GoodnessEzeokafor

pragma solidity >=0.4.22 <0.9.0;

import './BCShopSeller.sol';
import './BCShopCourier.sol';

contract BCShopBuyer {
address payable sellerAddress;
SellerInterface SellerContract;
CourierInterface CourierContract;
    constructor(address payable _sellerAddress, address courierAddress) {

GoodnessEzeokafor

import math
from functools import reduce
class Calculator:
    def __init__(self):
        pass
    
    def __str__(self):
        return "Basic calculator"