Solidity- Error Handling
- 1. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y S O L I D I T Y E R R O R H A N D L I N G
- 2. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y confidential @Tutorials Diary | www.tutorialsdiary.com Error Handling How to do error handling in solidity
- 3. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y confidential @Tutorials Diary | www.tutorialsdiary.com Error Handling require assert revert throw
- 4. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y confidential @Tutorials Diary | www.tutorialsdiary.com require Here we check the conditions and revert the state in case condition does not met. This is most commonly used in solidity for error handling This does not consume any gas Syntax require(condition, errorMessage) Example require(newBalance > minimumBalance, "Your do not have minimum balance in your account")
- 5. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y confidential @Tutorials Diary | www.tutorialsdiary.com assert Prevent anything really bad from happening. This does consume all the gas and revert the state Syntax assert(condition) Example assert(balance %2 == 0)
- 6. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y confidential @Tutorials Diary | www.tutorialsdiary.com revert This revert the state along with error message Syntax revert("failure reason") Example revert("you do not have sufficient balance" )
- 7. + 9 1 9 5 0 1 7 0 7 7 4 1 T U T O R I A L S D I A R Y confidential @Tutorials Diary | www.tutorialsdiary.com throw This is used to revert the state but this is depreciated now Syntax throw Example throw;