Error Handling

Solidity incorporates robust error management features to handle both build-time and runtime errors. While syntax errors are checked during the conversion of Solidity to bytecode. Runtime errors such as out-of-gas, data-type overflow, divide-by-zero, and array-out-of-index are typically encountered during contract execution. In earlier versions, error handling relied on the throw statement, but newer versions have introduced additional constructs like assert(), require(), and revert() for more efficient and expressive error handling.

The require() statement

The require() statement in Solidity establishes conditions that must be satisfied before a function can execute. It acts as a constraint, evaluating a boolean expression and triggering an exception if the condition is false. The require() statement is a vital tool for enforcing constraints and validating inputs. For example, a developer might use the require() statement to check:

• Improperly called function: If a function is incorrectly called, resulting in an exception, the require() ...