Hello @abcoathup ,
i am trying to verify my contract. i followed step by step from the below tutorial but still got failed to verify.
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
contract MulaToken is ERC20, Ownable {
token address on rinkeby 0x78103a25ECeB14Cc8041e3938f6E0C837443574c
cc: @Skyge 
thanks for your help in advance.!
So what is your compiler version and could you please share the full source code?
i am using truffle version 5.4.0, solidity 0.8.0 and truffle-plugin-verify :0.5.11
and below is my complete code
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
contract MulaToken is ERC20, Ownable {
using SafeMath for uint256;
uint256 totalSupply = 100 * 10**6 * (10 ** uint256(decimals()));
/** If false we are are in transfer lock up period.*/
bool public released = false;
/**Only the crowdsale address can make transfer during the lock up period */
address public crowdsale;
uint256 firstListingDate;
struct lockAllowance{
uint256 total; uint256 allowance; uint256 spent; uint lockStage;
}
mapping(address => lockAllowance) lockAllowances;
mapping(address => bool) public earlyInvestors;
/** Limit token transfer until the lockup period is over.*/
modifier canTransfer() {
if(!released) {
require(crowdsale == msg.sender,"you are not permitted to make transactions");
}
_;
}
modifier onlyCrowdSale() {
require(crowdsale == msg.sender,"you are not permitted to make transactions");
_;
}
modifier investorChecks(uint256 _value){
if(firstListingDate + 30 days < block.timestamp ){
if(earlyInvestors[msg.sender]){
updateLockAllownces();
lockAllowance storage lock = lockAllowances[msg.sender];
require(lock.spent <= _value);
updateLockSpent(_value);
}
}
_;
}
constructor() ERC20("Mula Token", "MULA") {
_mint(msg.sender, totalSupply);
}
/** Allow only the crowdsale address to relase the tokens into the wild */
function releaseTokenTransfer() onlyCrowdSale() public {
released = true;
}
/**Set the crowdsale address. **/
function setReleaser(address _crowdsale) onlyOwner public {
crowdsale = _crowdsale;
}
function addToLock(uint256 _total,address _investor)public onlyCrowdSale(){
if(!earlyInvestors[_investor]){
lockAllowance memory lock;
lock.total = _total;
lock.allowance = 0;
lock.spent = 0;
lockAllowances[_investor] = lock;
earlyInvestors[_investor]=true;
}else{
updateLockTotal(_total);
}
}
function updateLockTotal(uint256 _total) internal returns(bool){
lockAllowance storage lock = lockAllowances[msg.sender];
lock.spent = lock.total + _total;
//emit LogVaultWithdrawal(msg.sender, amount);
return true;
}
function updateLockSpent(uint256 _spent) internal returns(bool){
lockAllowance storage lock = lockAllowances[msg.sender];
lock.spent = lock.spent + _spent;
//emit LogVaultWithdrawal(msg.sender, amount);
return true;
}
function updateLockAllownces() internal returns (bool){
lockAllowance storage lock = lockAllowances[msg.sender];
if(firstListingDate + 7 days >= block.timestamp && firstListingDate + 13 days <= block.timestamp){
if(lock.lockStage < 1){
lock.allowance = (lock.total.mul(50 *100)).div(10000);
lock.lockStage = 1;
}
//first allowance
}else if(firstListingDate + 14 days >= block.timestamp && firstListingDate + 29 days <= block.timestamp){
//second allowance
if(lock.lockStage == 1){
lock.allowance = (lock.total.mul(70 *100)).div(10000);
lock.lockStage = 2;
}
}
return true;
}
function transfer(address _to, uint256 _value) canTransfer() investorChecks(_value) public override returns (bool success) {
super.transfer(_to,_value);
return true;
}
}
I am not sure, but when I ran truffle compile, I got an error.
What is the version of the @openzeppelin/contracts in your package.json file?
here you go
“@openzeppelin/contracts”: “^4.1.0”,
when i compiled i got an error with this error
so i changed the variable name in totalSupply to tSupply
here
uint256 totalSupply = 100 * 10**6 * (10 ** uint256(decimals()));
and here
constructor() ERC20("Mula Token", "MULA") {
_mint(msg.sender, totalSupply);
}
i ran the compile command and it was successful.
So the contract you shared above was not the original code that you deployed, right?
no. i made some changes before uploading it.
below is an updated version and its address. i uploaded this on on the BSC Testnet
0xa196ebe30D23d3db7039Ce4d16730A4b90347957
pragma solidity 0.8 ;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./MedPingLockBox.sol";
contract MedPingToken is ERC20,Ownable,MedPingLockBox{
using SafeMath for uint256;
uint256 tSupply = 200 * 10**6 * (10 ** uint256(decimals()));
constructor() ERC20("Medping", "PING"){
_mint(msg.sender, tSupply);
}
function transfer(address _to, uint256 _value) canTransfer() investorChecks(_value,msg.sender) public override returns (bool success) {
super.transfer(_to,_value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) canTransfer() investorChecks(_value,_from) public override returns (bool success) {
super.transferFrom(_from, _to, _value);
return true;
}
function burnPING(uint256 _date) public onlyBurner() returns(bool success){
require(!isTokenBurntOnDate(_date));
require(released);
uint256 totalToBurn = (burnBucketBal.mul(10 *100)).div(10000); //burn 10 % of burnbucket quaterly
_burn(msg.sender, totalToBurn);
burnDateStatus[_date] = true;
return true;
}
}`
MedPingLockBox
pragma solidity ^ 0.8;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
contract MedPingLockBox is Ownable{
using SafeMath for uint256;
address crowdsale;
address payable burnBucket;
uint256 crowdsaleBal; // token remaining after crowdsale
uint256 burnBucketBal;
uint256 lockStageGlobal;
mapping(uint256 => mapping(address=>bool)) provisionsTrack;
/** If false we are are in transfer lock up period.*/
bool public released = false;
uint256 firstListingDate = 1; //date for first exchange listing
struct lockAllowance{uint256 presale_total; uint256 privatesale_total; uint256 allowance; uint256 spent; uint lockStage;}
mapping(address => lockAllowance) lockAllowances; //early investors allowance profile
mapping(address => bool) earlyInvestors;//list of early investors
uint256 [] provisionDates;
uint256 [] burnDates;
mapping(uint256=>bool) burnDateStatus;
/** MODIFIER: Limits actions to only crowdsale.*/
modifier onlyCrowdSale() {
require(crowdsale == msg.sender,"you are not permitted to make transactions");
_;
}
/** MODIFIER: Limits actions to only burner.*/
modifier onlyBurner() {
require(burnBucket == msg.sender,"you are not permitted to make transactions");
_;
}
/** MODIFIER: Limits token transfer until the lockup period is over.*/
modifier canTransfer() {
if(!released) {
require(crowdsale == msg.sender,"you are not permitted to make transactions");
}
_;
}
/** MODIFIER: Limits and manages early investors transfer.
*check if is early investor and if within the 30days constraint
*/
modifier investorChecks(uint256 _value,address _sender){
if(isEarlyInvestor(_sender)){
if((firstListingDate + (13 * 30 days)) > block.timestamp){ //is investor and within 13 months constraint
lockAllowance storage lock = lockAllowances[_sender];
if(!isAllowanceProvisioned(_sender,lockStageGlobal)){
provisionLockAllownces(_sender,lock.lockStage);
}
require(lock.allowance >= _value,"allocation lower than amount you want to spend"); //validate spending amount
require(updateLockAllownces(_value,_sender)); //update lock spent
}
}
_;
}
constructor()
Ownable() {
}
/** Allows only the crowdsale address to relase the tokens into the wild */
function releaseTokenTransfer() onlyCrowdSale() public {
released = true;
}
/**Set the crowdsale address. **/
function setReleaser(address _crowdsale) onlyOwner() public { /**Set the crowdsale address. **/
crowdsale = _crowdsale;
}
/**Set the burnBucket address. **/
function setBurner(address payable _burnBucket) onlyOwner() public { /**Set the crowdsale address. **/
burnBucket = _burnBucket;
}
function setFirstListingDate(uint256 _date) public onlyCrowdSale() returns(bool){
firstListingDate = _date;
uint firstReleaseDate = _date + (3 * 30 days); //3months after the listing date
provisionDates.push(firstReleaseDate);
for (uint256 index = 1; index <= 10; index++) { //remaining released monthly after the first release
uint nextReleaseDate = firstReleaseDate +(index * 30 days);
provisionDates.push(nextReleaseDate);
uint _burndate = firstReleaseDate + (index *(3 * 30 days));
burnDates.push(_burndate);
burnDateStatus[_burndate] = false;
}
return true;
}
/** lock early investments per tokenomics.*/
function addToLock(uint256 _presale_total,uint256 _privatesale_total, address _investor) public onlyCrowdSale(){
//check if the early investor's address is not registered
if(!earlyInvestors[_investor]){
lockAllowance memory lock;
lock.presale_total = _presale_total;
lock.privatesale_total = _privatesale_total;
lock.allowance = 0;
lock.spent = 0;
lockAllowances[_investor] = lock;
earlyInvestors[_investor]=true;
}else{
lockAllowance storage lock = lockAllowances[_investor];
lock.presale_total += _presale_total;
lock.privatesale_total += _privatesale_total;
}
}
function investorAllowance(address investor) public view returns (uint256 presale_total, uint256 privatesale_total,uint256 allowance,uint256 spent, uint lockStage){
lockAllowance storage l = lockAllowances[investor];
return (l.presale_total,l.privatesale_total,l.allowance,l.spent,l.lockStage);
}
/** update allowance box.*/
function updateLockAllownces(uint256 _spending, address _sender) internal returns (bool){
lockAllowance storage lock = lockAllowances[_sender];
lock.allowance -= _spending;
lock.spent += _spending;
return true;
}
/** provision allowance box.*/
function provisionLockAllownces(address _beneficiary,uint _lockStage) internal returns (bool){
require(block.timestamp >= provisionDates[0]);
lockAllowance storage lock = lockAllowances[_beneficiary];
uint256 presaleInital = lock.presale_total;
uint256 privatesaleInital = lock.privatesale_total;
require(_lockStage <= 10);
require(lock.lockStage == _lockStage);
if(lock.lockStage < 1){//first allowance provision
if(presaleInital > 0){
presaleInital = (lock.presale_total.mul(20 *100)).div(10000);
lock.allowance += presaleInital;
}
if(privatesaleInital > 0){
privatesaleInital = (lock.privatesale_total.mul(30 *100)).div(10000);
lock.allowance += privatesaleInital;
}
lock.presale_total -= presaleInital;
lock.privatesale_total -= privatesaleInital;
lock.lockStage = 1;
provisionsTrack[lockStageGlobal][_beneficiary] = true;
}else if(lock.lockStage >= 1){//following allowance provision
if(presaleInital > 0){
presaleInital = (lock.presale_total.mul(10 *100)).div(10000);
lock.allowance += presaleInital;
}
if(privatesaleInital > 0){
privatesaleInital = (lock.privatesale_total.mul(10 *100)).div(10000);
lock.allowance += privatesaleInital;
}
lock.lockStage += 1;
provisionsTrack[lockStageGlobal][_beneficiary] = true;
}
return true;
}
function isAllowanceProvisioned(address _beneficiary,uint _lockStageGlobal) public view returns (bool){
return provisionsTrack[_lockStageGlobal][_beneficiary];
}
function updateLockStage() onlyBurner() public returns (bool){
lockStageGlobal +=1;
return true;
}
/** update token remaining after crowdsale .*/
function updatecrowdsaleBal(uint256 _amount,uint256 _tSupply) public onlyCrowdSale() returns(bool success) {
crowdsaleBal += _amount;
burnBucketBal = (_tSupply.mul(5 *100)).div(10000) + crowdsaleBal; // 5% of total supply + crowdsale bal
return true;
}
function isEarlyInvestor(address investor) public view returns(bool){
if(earlyInvestors[investor]){
return true;
}
return false;
}
function getFirstListingDate() public view returns(uint256){
return firstListingDate;
}
function getProvisionDates() public view returns (uint256 [] memory){
return provisionDates;
}
function getCrowdsaleBal() public view returns(uint256) {
return crowdsaleBal;
}
function getBurnBucketBal() public view returns(uint256) {
return burnBucketBal;
}
function getBurnBucket() public view returns(address payable) {
return burnBucket;
}
function tokenBurnDates() public view returns (uint256 [] memory){
return burnDates;
}
function isTokenBurntOnDate(uint256 _date) public view returns (bool){
return burnDateStatus[_date];
}
}
Have tried, but it always failed, so I am not sure what is wrong.
I just use deployed the code you share above and I can verify successfully, you can have a look:https://kovan.etherscan.io/address/0x01d2e906e6a23a9dab4a327657a79561b355f780#code
And I really recommend you use tool to deploy contracts and verify, such as Truffle or Hardhat, it is much easier!!!
Okay, so could you please show me your contract repo. I can have a try.
hello @Skyge i finally was able to verify it. i removed the Ownable.sol and the inherentance tag (Ownable) from MedPingToken since it already inherits from the MedPingLockBox.sol
verified address : 0x92C34348196109423026f9fb1c5bF8ed8d951B6c
thank you