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skip-mev / skip-go-cosmwasm-contracts

CosmWasm Contracts for Skip Go
Apache License 2.0
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⚡️ [API-2349] Preserve Pre Swap Out Asset Contract Balance #83

Closed NotJeremyLiu closed 9 months ago

NotJeremyLiu commented 10 months ago

This PR

Summary by CodeRabbit

coderabbitai[bot] commented 10 months ago

Walkthrough

The recent updates introduce a mechanism to track the pre-swap out asset amount to ensure that only the user's deposited funds are used in swaps. This is achieved by saving the contract's balance before a swap and referencing it before executing a subsequent action. The changes aim to prevent the unintentional inclusion of existing funds in user-initiated swaps, thereby safeguarding against the potential loss of funds.

Changes

File Path Change Summary
contracts/.../src/execute.rs Added PRE_SWAP_OUT_ASSET_AMOUNT constant; updated functions to use this constant for tracking balance before swaps.
contracts/.../src/state.rs Introduced PRE_SWAP_OUT_ASSET_AMOUNT as Item<Uint128> for state management.
contracts/.../tests/test_execute_post_swap_action.rs Extended Params struct and updated tests with pre_swap_out_asset_amount.
contracts/.../tests/test_execute_swap_and_action.rs Added assertions for pre_swap_out_asset_amount to validate swap correctness.

Assessment against linked issues

Objective Addressed Explanation
Track balance deltas to prevent inadvertent inclusion of funds in swaps (API-2349) ✅
Implement balance check excluding user tokens before swaps (API-2349) ✅
Ensure contract sends only user deposit balance differences (API-2349) ✅
Mitigate risk of fund loss and ensure accurate token transfers (API-2349) ✅

Poem

In the code where tokens flow, A rabbit fixed the swap, you know. With constants set and checks in line, 🐇💻 Now every swap is safe and fine.

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