Verify & Publish Contract Source Code

Hello friends, I need you to help me with this topic since I have almost no experience in the subject

I created a contract in Mist Ethereum Wallet, an ERC20 Token and I want to publish it in EtherTHER, but at the time of copying and pasting it I get this error in EtherBN “Error! Unable to generate Contract ByteCode and ABI (Compiler Exception)”

I appreciate what you can help me, Thank you.

Here I leave the contract

pragma solidity ^0.4.16;
contract owned {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);

// This generates a public event on the blockchain that will notify clients
event Approval(address indexed _owner, address indexed _spender, uint256 _value);

// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
/
constructor(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
/
*
* Internal transfer, only can be called by this contract
/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
emit Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/
*
* Transfer tokens
*
* Send _value tokens to _to from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
/
function transfer(address _to, uint256 _value) public returns (bool success) {
_transfer(msg.sender, _to, _value);
return true;
}
/
*
* Transfer tokens from other address
*
* Send _value tokens to _to in behalf of _from
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/
*
* Set allowance for other address
*
* Allows _spender to spend no more than _value tokens in your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
/
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/
*
* Set allowance for other address and notify
*
* Allows _spender to spend no more than _value tokens in your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/
*
* Destroy tokens
*
* Remove _value tokens from the system irreversibly
*
* @param _value the amount of money to burn
/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
/
*
* Destroy tokens from other account
*
* Remove _value tokens from the system irreversibly on behalf of _from.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender’s allowance
totalSupply -= _value; // Update totalSupply
emit Burn(_from, _value);
return true;
}
}
/
/
/
Change the name of the contract from Kahawanu to your own token name
/
/
/
contract Kahawanu is owned, TokenERC20 {
uint256 public sellPrice;
uint256 public buyPrice;
mapping (address => bool) public frozenAccount;
/
This generates a public event on the blockchain that will notify clients /
event FrozenFunds(address target, bool frozen);
/
Initializes contract with initial supply tokens to the creator of the contract /
constructor(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) TokenERC20(initialSupply, tokenName, tokenSymbol) public {}
/
Internal transfer, only can be called by this contract */
function _transfer(address _from, address _to, uint _value) internal {
require (_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require (balanceOf[_from] >= _value); // Check if the sender has enough
require (balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
emit Transfer(_from, _to, _value);
}
/// @notice Create mintedAmount tokens and send it to target
/// @param target Address to receive the tokens
/// @param mintedAmount the amount of tokens it will receive
function mintToken(address target, uint256 mintedAmount) onlyOwner public {
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
emit Transfer(0, this, mintedAmount);
emit Transfer(this, target, mintedAmount);
}
/// @notice freeze? Prevent | Allow target from sending & receiving tokens
/// @param target Address to be frozen
/// @param freeze either to freeze it or not
function freezeAccount(address target, bool freeze) onlyOwner public {
frozenAccount[target] = freeze;
emit FrozenFunds(target, freeze);
}
/// @notice Allow users to buy tokens for newBuyPrice eth and sell tokens for newSellPrice eth
/// @param newSellPrice Price the users can sell to the contract
/// @param newBuyPrice Price users can buy from the contract
function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner public {
sellPrice = newSellPrice;
buyPrice = newBuyPrice;
}
/// @notice Buy tokens from contract by sending ether
function buy() payable public {
uint amount = msg.value / buyPrice; // calculates the amount
_transfer(this, msg.sender, amount); // makes the transfers
}
/// @notice Sell amount tokens to contract
/// @param amount amount of tokens to be sold
function sell(uint256 amount) public {
address myAddress = this;
require(myAddress.balance >= amount * sellPrice); // checks if the contract has enough ether to buy
_transfer(msg.sender, this, amount); // makes the transfers
msg.sender.transfer(amount * sellPrice); // sends ether to the seller. It’s important to do this last to avoid recursion attacks
}
}

Welcome here!

I never heard of EtherTHER and EtherBN. Could you explain what is this?

And what are you trying to accomplish exactly? Deploy the contract to the Ethereum Blockchain?

The page did the translation like this, sorry that I mean the page EtherScam

That’s Etherscan, Etherscam does not sound like a good name :slight_smile:

Seems like Etherscan cant even compile your contract.
You can try to compile your contract first in Remix to see at least if it compiles.

I don’t know how to compile in Remix, what are the steps to follow since my contract is pragma solidity ^0.4.16;
contract owned

Need to change solidity version in compile tab.
You can find video tutorial on remix here.

remix.ethereum throws some errors at me and by reviewing other contracts I can correct it, the question is: Correcting certain errors of the original contract, when I publish it on EtherScam will I have problems?

you need to fix any compilation errors before deploying to blockchain yes.