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medium Time Dependence SWC-116 CWE-829

Block Timestamp Manipulation Dependence

SAFE-0065 Time Dependence Checked automatically by the scanner
1

What goes wrong

Logic uses block.timestamp for fine-grained decisions (randomness, narrow deadlines, exact pricing). Validators can nudge timestamps by a few seconds, biasing outcomes.

2

How to fix it

the pattern that is safe
require(block.timestamp >= startTime + DELAY, "too early"); // tolerant ranges
◆
SWC-116. Use timestamps only with tolerance.
3

Related vulnerabilities in Time Dependence

SAFE-0066Timelock / Deadline Missing on Sensitive Action medium · Time Dependence SAFE-0309block.timestamp Used in a Strict Equality low · Time Dependence
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