**Hi Filip, **
thank you for responding, sure thing, here is the contract code for the token that I created using your code and the lessons:
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// EricToken token contract
//
// Deployed to : 0xEb7208A7453dFC3C7380170A99fc5156A160Cd75
// Symbol : ERICOIN
// Name : ERICOIN
// Total supply: 100000000
// Decimals : 18
//
// Enjoy.
//
// © by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract EriCoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "ERICOIN";
name = "EriCoin";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[0xEb7208A7453dFC3C7380170A99fc5156A160Cd75] = _totalSupply;
emit Transfer(address(0), 0xEb7208A7453dFC3C7380170A99fc5156A160Cd75, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
and here is the code for the crowdsale:
pragma solidity ^0.4.16;
interface EriCoin {
function transfer(address receiver, uint amount);
}
contract Crowdsale {
address public beneficiary; //person who gets the payout from the contract
uint public fundingGoal;
uint public totalAmountRaised;
uint public crowdSaleDeadline;
uint public tokenPrice;
EriCoin public token;
mapping(address => uint) public balanceOf; //database of everyone's contributions to the crowdSaleDeadline
bool fundingGoalReached = false;
bool crowdSaleClosed = false;
/**
* Constructor
* ifSuccessfulSendTo: Address where funds should be sent if sale reaches target
* goalInEther: What is the target goal for the crowdsale in ethers.
* durationInMinutes: How long will the crowdsale be running.
* tokenPriceInEther: How much does each token cost
* addressOfToken: Where is the token contract deployed.
*/
function Crowdsale(
address ifSuccessfulSendTo,
uint goalInEther,
uint durationInMinutes,
uint tokenPriceInEther,
address addressOfToken
) {
beneficiary = ifSuccessfulSendTo;
fundingGoal = goalInEther;
crowdSaleDeadline = now + durationInMinutes * 1 minutes; //done this way to get the type 'minutes'
tokenPrice = tokenPriceInEther * 1 ether; //like above, done this way to get the type 'ether'
token = EriCoin(addressOfToken); //this will be filled in later when the EriCoin contract is deployed
}
/**
* Fallback function
*
* Default function which gets called when someone sends money to the contract. Will be used for joining sale.
*/
function () payable {
require(!crowdSaleClosed);
uint amount = msg.value;
balanceOf[msg.sender] += amount;
totalAmountRaised += amount;
token.transfer(msg.sender, amount);
}
/**
* Modifier used to check if deadline for crowdsale has passed
*/
modifier afterDeadline() {
if(now >= crowdSaleDeadline){
_;
}
}
/**
* Check if the funding goal was reached. Will only be checked if afterDeadline modifier above is true.
*
*/
function checkGoalReached() public afterDeadline {
if(totalAmountRaised >= fundingGoal){
fundingGoalReached = true;
}
crowdSaleClosed = true;
}
/**
* Withdraw the funds
*
* Will withdraw the money after the deadline has been reached. If the goal was reached, only the owner can withdraw money to the beneficiary account.
* If you goal was not reached, everyone who participated can withdraw their share.
*/
function safeWithdrawal() public afterDeadline {
if(!fundingGoalReached){
uint amount = balanceOf[msg.sender];
balanceOf[msg.sender] = 0;
if(amount > 0){
if(!msg.sender.send(amount)){
balanceOf[msg.sender] = amount;
}
}
}
if(fundingGoalReached && msg.sender == beneficiary){
fundingGoalReached = false;
}
}
}