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What is the problem that the version of the solid compiler cannot be matched after the truss compile prompt

2022-02-03 20:51:14 【Q & A of Denglian community】



Take the answer 1：

Hello , This problem is because you are in the environment Truffle What is used Solidity The compiler version is inconsistent with the compiler version required by your contract code .

To look at first truffle Default solidity edition 

truffle version

The current default compiler version will be displayed 

Truffle v5.1.6 (core: 5.1.6)Solidity v0.5.12 (solc-js)Node v12.9.0Web3.js v1.2.1

Then check the compiler configuration in the project Configure in truffle-config.js In file , By default, there is no compilers To configure ( see Truffle The configuration document ).

without , The default compiler version is used .

Modify compiler configuration

Because your contract is 0.5.12 Version for , So you can truffle-config.js In the definition of solc Compiler version requirements .

The code is as follows ：

module.exports = {   compilers: {    solc: {      version: "0.5.12",    }  }};




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