stupeters187

Bermuda Blockchain Bootcamp - Technical Track Final Assignment

Assignment Specifications:

• Build a smart contract using the Solidity programming language

• The contract must have a minimum of 4 functions

• The contract must utilize a minimum of 1 data structure (array, mapping)

stupeters187

pragma solidity ^0.5.0;

contract EthStorage {

    uint maxWithdrawl = 1 ether;
    
    mapping(address => uint) public balances;
    
    function deposit() public payable {
        balances[msg.sender] += msg.value;

stupeters187

interface ERC777Token {
    function name() public view returns (string);
    function symbol() public view returns (string);
    function totalSupply() public view returns (uint256);
    function balanceOf(address owner) public view returns (uint256);
    function granularity() public view returns (uint256);

    function defaultOperators() public view returns (address[]);
    function authorizeOperator(address operator) public;
    function revokeOperator(address operator) public;

stupeters187

pragma solidity ^0.4.20;

/// @title ERC-721 Non-Fungible Token Standard
/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
///  Note: the ERC-165 identifier for this interface is 0x80ac58cd.
interface ERC721 /* is ERC165 */ {
    /// @dev This emits when ownership of any NFT changes by any mechanism.
    ///  This event emits when NFTs are created (`from` == 0) and destroyed
    ///  (`to` == 0). Exception: during contract creation, any number of NFTs
    ///  may be created and assigned without emitting Transfer. At the time of

stupeters187

pragma solidity ^0.4.9;

 /* New ERC223 contract interface */
 
contract ERC223 {
  uint public totalSupply;
  function balanceOf(address who) public view returns (uint);
  
  function name() public view returns (string _name);
  function symbol() public view returns (string _symbol);

stupeters187

// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
    function totalSupply() public view returns (uint);
    function balanceOf(address tokenOwner) public view returns (uint balance);
    function allowance(address tokenOwner, address spender) public view returns (uint remaining);
    function transfer(address to, uint tokens) public returns (bool success);
    function approve(address spender, uint tokens) public returns (bool success);

stupeters187

pragma solidity 0.5.2;

contract Crowdfunding {
    
    address payable beneficiary;
    uint goalInEther;
    uint deadline;
    
    mapping (address => uint) public contributions;
    

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pragma solidity 0.5.2;

contract Escrow {
    
    //state variables
    address payable buyer;
    address payable seller;
    address arbiter;
    uint public amountInWei;
    

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pragma solidity ^0.5.2;

contract HelloWorld {
    
    uint public num;
    
    event NewNum(address indexed _who, uint _newNum, uint _timestamp);
    
    constructor(uint _num) public {
        num = _num;

stupeters187

pragma solidity ^0.4.25;

contract Escrow {
    
    address public buyer;
    address public seller;
    address public arbiter;
    uint256 public escrowAmount;
    
    constructor(address _buyer, address _arbiter, uint256 _escrowAmount) public {