Verify openzippelin code on BSCscan

[yao_sun]

I am a newbie in coding. I followed all the steps to deploy a copied contract from openzippelin on BSC using remix and it was all good. but when i try to verify the code, i got the following Error. i just copy and paste code from remix. can someone please help? thanks

Compiler debug log:
Error! Unable to generate Contract ByteCode and ABI (General Exception, unable to get compiled [bytecode])
For troubleshooting, you can try compiling your source code with the Remix - Solidity IDE and check for exceptions

Compiler Warning(s):

ParserError: Source "@openzeppelin/contracts/token/ERC20/ERC20.sol" not found: File import callback not supported --> myc:4:1: | 4 | import "@openzeppelin/contracts/token/ERC20/ERC20.sol" | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ParserError: Source "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol" not found: File import callback not supported --> myc:5:1: | 5 | import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol" | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ParserError: Source "@openzeppelin/contracts/token/ERC20/extensions/ERC20Snapshot.sol" not found: File import callback not supported --> myc:6:1: | 6 | import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Snapshot.sol" | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ParserError: Source "@openzeppelin/contracts/access/Ownable.sol" not found: File import callback not supported --> myc:7:1: | 7 | import "@openzeppelin/contracts/access/Ownable.sol" | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ParserError: Source "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol" not found: File import callback not supported --> myc:8:1: | 8 | import "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol" | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ParserError: Source "@openzeppelin/contracts/token/ERC20/extensions/ERC20Votes.sol" not found: File import callback not supported --> myc:9:1: | 9 | import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Votes.sol" | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• Compiler Version: v0.8.2+commit.661d1103
• Optimization Enabled: False
• Runs: 200

ByteCode (what we are looking for) :
6101406040527f6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9610120908152503480156200003

[FreezyEx]

Try to flatten your code. Bscscan doesn't allow "import"

Verify ERC20 token on Etherscan that was deployed through Remix: Step by Step Guide

At the previous tutorial: Create an ERC20 using Remix, without writing Solidity, we have learned how to deploy contracts with the Remix, and now in this tutorial, we will learn how to verify the deployed contracts by a single file. Cause many people deploy contracts by the Remix, so in this part, we will use the plugin FLATTENER in the Remix to help us to package all contracts file into a single file to verify. In short, all steps are: Compile contract Flatten contract Copy the whole code to…

[FreezyExIsNotABitch]

Try a different compiler version.

[itsmakiidilla]

Hi, I tried your above method using the compile, flatten way but when I flatten I get an error in the code on line 40: interface IERC20Metadata is IERC20 which reads: TypeError: Definition of base has to precede definition of derived contract --> bep-20_flat.sol:40:29:
|
40 | interface IERC20Metadata is IERC20

I have no clue what this means and cannot find a solution anywhere, can you please help if possible?

[FreezyEx]

Did you add the IERC20 interface before IERC20Metadata?

[itsmakiidilla]

Im not sure what you mean? This was the reference when I compiled the code and then flattened it. Can you explain a bit more what you are asking me? thanks

[FreezyEx]

When you flattened it, where did you put "interface IERC20..." ?
Is it before or after "interface IERC20MEtadata is IERC20..." ?