<ul><li>Solidity 0.8.0 introduced gas costs for arithmetic operations to check for overflows and underflows, impacting gas optimization.</li><li>The use of 'unchecked' blocks in Solidity can save gas but may lead to vulnerabilities if not used carefully.</li><li>The 'EnhancedSafeMathTester' was developed to explore safe usage of 'unchecked' math in various scenarios, including methods for handling arithmetic with safety mechanisms.</li><li>Additional security patterns such as emergency circuit breakers, access control, and event monitoring were implemented to enhance contract security beyond arithmetic safety.</li></ul>

# Solidity Unchecked Math — Beyond the Basics: Making Gas Optimisation Safe

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