Smart Contracts & Solidity Development

[Mercure28]

Why does my Solidity contract return an error invalid opcodewhen deploying?

[TatyOko28]

The error invalid opcodeusually occurs when the contract performs an invalid operation, which can be caused by:

A version mismatch between Solidity and the runtime environment (Ganache, Hardhat, etc.).
Incorrect use of requireorassert , which causes the program to terminate abruptly.
Improper error handling in the contract (e.g. access to an uninitialized variable).
A gas problem if the transaction exceeds the allowed gas limit.
Solution : Check Solidity version and enable optimization ( optimizer: { enabled: true, runs: 200 }). Add logs ( emit Event) to debug.