Could not find @openzeppelin/contracts/token/ERC20/ERC20Detailed.sol from any sources

[MajoGro]

HI,
I have the same problem I’m trying to compile a token contract and get error:
Could You help me please, I can’t solve my problem.

Error: Could not find @openzeppelin/contracts/token/ERC20/ERC20Detailed.sol from any sources; imported from C:/Users/majo1/SimpleGame/Solidity/contracts/GameToken.sol
at Resolver. (C:\Users\majo1\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\resolver\dist\lib\resolver.js:62:1)
at Generator.next ()
at fulfilled (C:\Users\majo1\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\resolver\dist\lib\resolver.js:5:42)
Environment :
Truffle 5.1.63
Node 14.15.4
Solidity 0.5.16

[abcoathup]

Hi @MajoGro,

Welcome to the community

ERC20Detailed.sol was included in ERC20.sol from OpenZeppelin Contracts 3.x

If you want to use your code as is you can import the older version of OpenZeppelin Contracts 2.x
npm install @openzeppelin/contracts@2.5.1

Though I would recommend updating to use the latest version, OpenZeppelin Contracts 3.4.
npm install @openzeppelin/contracts

The documentation has an example ERC20:
https://docs.openzeppelin.com/contracts/3.x/erc20#constructing-an-erc20-token-contract

[MajoGro]

Hello,

thank you for accepting me into the community. With your help, I succeeded. This is crazy. I’m on my way to becoming a blockchain developer again.
Majo

[abcoathup]

Hi @MajoGro,

Glad you resolved.

If you get a chance it would be great to Introduce yourself here!

[MajoGro]

Hi Andrew,
now I’m coding RefungibleToken and have the same problem like before. I’m trying to compile a token contract and I get error:

Error: Could not find @openzepplin/contracts/token/ERC20/IERC20.sol from any sources; imported from C:/Users/majo1/EatTheBlocks/ReFungibletoken/contracts/ReFungibleToken.sol
    at Resolver.<anonymous> (C:\Users\majo1\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\resolver\dist\lib\resolver.js:62:1)
    at Generator.next (<anonymous>)
    at fulfilled (C:\Users\majo1\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\resolver\dist\lib\resolver.js:5:42)

Last time you advised me to install in my project the older version of openzeppelin and it worked. Now I did try to install all different versions of openzeppelin (3.3.0-solc-0.7, 3.4.0-solc-0.7, 3.2.1-solc-0.7) and I get the same error.
Environment :
Truffle 5.1.63
Node 14.15.4
Solidity 0.7.3
Where is problem ?
Once you advised one member that he install openzeppelin locally and not globally. What this means? Is this means that he install in folder where code is ?
Thanks.
Majo

[abcoathup]

Hi @MajoGro,

@MajoGro

@openzepplin/contracts/token/ERC20/IERC20.sol

You have a typo on your import, you are missing an e in zeppelin, it should be @openzeppelin/contracts.