npm solc: AssertionError [ERR_ASSERTION]: Invalid callback specified

Question

I am trying to compile solidity smart contract using npm solc. I tried to follow different examples. Link to example: https://medium.com/coinmonks/how-to-compile-a-solidity-sma

Answer 1

If you have see error like this.You must do following two steps.

1. Uninstall solc:

   npm uninstall solc

2. Reinstall one of two versions:

The version used in the course:

npm install --save solc@0.4.17

or

The newest version that will not break:

npm install --save solc@0.4.25

source - Udemy - Ethereum and Solidity The Complete Developer's Guide