Error: Truffle is currently using solc 0.5.16, but one or more of your contracts specify “pragma solidity ^0.8.0”

Question

Here is a photo of the error - https://gyazo.com/2f5ea2f50cc1d4ef5eea2f21d0e04fe7

All my contracts are using the ^0.8.0 pragma. My truffle-config is also using the same version as you can see here - https://gyazo.com/1ec8b28ca48902c091004f8659cf678d

Please help. Thank you very much.

score 11 · Answer 1 · edited Dec 14 '21 at 04:08

11

Omit the "^". Not version:"^0.8.0".

compilers: {
       solc: {
           version: "0.8.0"  
       }
}

edited Dec 14 '21 at 04:08

Pang

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answered Jul 11 '21 at 15:01

Yilmaz

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2

Thanks, the explicit version statement did the trick! – Tali Oat Oct 15 '21 at 11:23
1

Thanks! Now the current version is ==> version: "0.8.11", – M E S A B O Jan 23 '22 at 21:52

score 3 · Answer 2 · edited Dec 14 '21 at 04:09

3

Uncomment this line from truffle-config.js:

compilers: {
  solc: {
    version: "0.8.10",  // <-- this one
    .
    .
    ...

edited Dec 14 '21 at 04:09

Pang

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answered Dec 05 '21 at 10:43

drjorgepolanco

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score 2 · Answer 3 · edited Dec 14 '21 at 04:09

@Yilmaz is correct that the version needs to be modified. Change the truffle-config.js file to the correct compiler version. Make sure that you have a version set. I had the same error because the version was not set. If your file looks like this:

compilers: {
  solc: {
    // version: "0.5.1",    // Fetch exact version from solc-bin (default: truffle's version)
    // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
    // settings: {          // See the solidity docs for advice about optimization and evmVersion
    //  optimizer: {
    //    enabled: false,
    //    runs: 200
    //  },
    //  evmVersion: "Byzantium"
    // }
}

Change it to something like this:

compilers: {
  solc: {
    version: "^0.8.0"
}

Iheb Saad · Answer 4 · 2022-07-31T15:56:50.783

1

If you're using windows change your "truffle.js" file name to "truffle.config.js" and inside your truffle config file add this line of code if it doesn't exist

  compilers: {
solc: {
  version: "0.8.0"

make sure don't use "^" in version:"0.8.0"

}
  }

edited Jul 31 '22 at 15:56

answered Mar 04 '22 at 10:45

Iheb Saad

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score 0 · Answer 5 · edited Mar 16 '23 at 16:52

0

Put the compilers option just like what is in the below module.exports;

module.exports = {
  compilers: {
    solc: {
      version: "0.8.6"
    }
  },
}

edited Mar 16 '23 at 16:52

Tyler2P

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answered Mar 04 '23 at 07:22

roushan kumar

1

Error: Truffle is currently using solc 0.5.16, but one or more of your contracts specify “pragma solidity ^0.8.0”

5 Answers5