sec: Implement Safe Math and Overflow Protection for Aggregations - #36
Conversation
- Implemented boundary checks in initialize() to ensure positive contributions within safe maximums. - Substituted arithmetic operators (+, -, *) with checked_add, checked_sub, and checked_mul in payout(), contribute(), and withdraw_savings() to strictly panic gracefully on overflow/underflow rather than wrapping. - Added comprehensive unit tests for these boundary conditions (e.g. testing negative/zero initializations, and pool size overflow simulation)
|
Important
This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Pro Plus Run ID: Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
|
@Ultra-Tech-code great work, kindly resolve conflict , it was a result of previosly merged PR |
@Queenode, I've resolved the pr and make a push. Everything should work fine now |
Yes it's all fine now. |
2 participants
Resolves #23
Description
This PR addresses critical security requirements by explicitly implementing safe math (boundary checks and integer overflow protection) for aggregations throughout the Kolo Savings Contract.
Changes
initialize()to ensure thatcontribution_amountis greater than 0 and less than or equal to a reasonable maximum (1_000_000_000_000_000stroops). This strictly prevents malicious setups with overly massive or negative amounts.payout(): Replaced standard multiplication withchecked_mul().expect(...)to guarantee that calculations ofpool_sizeexplicitly panic with an informative message on overflow instead of silently wrapping.contribute()&withdraw_savings(): Replaced standard addition and subtraction withchecked_add().expect(...)andchecked_sub().expect(...)respectively, ensuring reliable math overflow/underflow protection for member contribution tracking.test_initialize_with_negative_amount_failstest_initialize_with_zero_amount_failstest_initialize_with_exceeding_max_amount_failstest_payout_pool_size_overflow_panics(Successfully verifies that the.expect()panic triggers cleanly on large inputs rather than wrapping).Testing
All 24 unit tests pass, and boundary condition panics have been thoroughly verified via snapshots.