Clarify require and assert usage #2631
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| in your contract you should fix. | ||
| if the condition is not met. The ``assert`` function should only be used to test for internal errors, and to check invariants. | ||
| The ``require`` function should be used to ensure valid conditions, such as inputs, or contract state variables are met, or to validate return values from calls to external contracts. | ||
| If used properly, analysis tools can evaluate your contract to identify the conditions and function calls which will reach a failing ``assert``. Properly functioning code should never it is reach a failing assert statement, if this happens there is a bug in your contract which you should fix. |
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