When try to verify token, I dont know what to put in for this line:

Constructor Arguments ABI-encoded (For contracts that accept constructor parameters)

I made token after looking at a YouTube video on how to do it.

I used this code:


And pasted it here:


Now I have no idea how to verify my token:


I saw that there you can copy some numbers after 0029 but there is nothing after 0029.

I also saw that I can use https://abi.hashex.org/ or this https://abi.sonnguyen.ws/, but I do not know how to use these websites.

  • This is an error I get when I only paste the code and try to verify: "Error! Unable to verify source code Missing Constructor Arguments for function CCXTokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol)" Aug 10, 2018 at 23:57
  • What values did you use for initial supply, token name, and token symbol? Aug 10, 2018 at 23:58
  • I used for initial supply, token name is Mooneta and token symbol is MNTX Aug 10, 2018 at 23:59
  • use sol-verifier to get rid of encoding overhead : npmjs.com/package/sol-verifier
    – Aniket
    Apr 23, 2019 at 9:20

1 Answer 1


Using your constructor function:

CCXTokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol)

And you initial parameters:

10000000000, Mooneta, MNTX

You can use https://abi.hashex.org/ like so:

enter image description here

This results in the following value which you should be able to use:

  • Thank you for help, sir. I used that code you provided me here and i got this error now: i.imgur.com/KZn2l4X.png Aug 11, 2018 at 1:05
  • I might look at a more in depth verification tutorial here. Aug 11, 2018 at 1:09
  • I have read the article you send me, but I still don't understand what I need to do in order to fix this error I am getting. Aug 11, 2018 at 1:34

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