simulate new repo token sale

[aazhou1]

For a new repo token that hasn't been sold yet, the asset value of this new repo token is omitted from the liquid concentration calculation since it is not in the repo token list yet in the simulation.

Summary by CodeRabbit

• New Features

  • Updated the calculation method for the liquidity ratio, enhancing accuracy in financial assessments.

• Bug Fixes

  • Improved the interpretation of the liquidity ratio for better operational insights.

[coderabbitai]

Walkthrough

The changes in this pull request focus on modifying the calculation of simulatedLiquidityRatio in the Strategy contract. The update shifts the method from a straightforward subtraction of proceeds from liquidBalance to a conditional division involving a new variable, assetValue. This adjustment alters how the liquidity ratio is computed, enhancing its relevance in the contract's operations.

Changes

Files	Change Summary
src/Strategy.sol	Modified the calculation of simulatedLiquidityRatio from subtraction to conditional division involving liquidBalance and assetValue.

Possibly related PRs

• Adding back concentration ratio #12: The changes in this PR involve modifications to the Strategy contract to introduce a new output parameter related to liquidity ratios, indicating a focus on similar calculations and control flow adjustments.
• cache total asset value #23: This PR enhances the calculations related to asset values and liquid balances in the Strategy contract, directly connecting to the changes made in the main PR regarding the calculation of simulatedLiquidityRatio and the introduction of assetValue.

Poem

🐇 In the world of finance, we hop and play,
Liquidity ratios lead the way.
From subtraction to division, we make the switch,
A smarter approach, without a hitch!
With balance and assets, we dance in delight,
In the land of Strategy, everything feels right! 🌟

---

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[coderabbitai]

Actionable comments posted: 1

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 795a0e2 and 32426d1.

Files selected for processing (1)

• src/Strategy.sol (1 hunks)

[coderabbitai]

Actionable comments posted: 0

Outside diff range and nitpick comments (1)

src/Strategy.sol (1)

384-390: Improved calculation of simulated liquidity ratio

The changes in the simulateTransaction function improve the calculation of the simulatedLiquidityRatio. The new implementation handles the case where assetValue is zero and uses a more precise calculation method.

However, there are a couple of points to consider:

1. The precision of the calculation has been increased by multiplying by 10^18, which aligns with the comment from the previous review.
2. The condition for zero assetValue is now handled explicitly, which is a good practice.

Consider extracting this calculation into a separate private function for better code organization and reusability. For example:

+    function _calculateLiquidityRatio(uint256 liquidBalance, uint256 proceeds, uint256 assetValue) private pure returns (uint256) {
+        if (assetValue == 0) {
+            return 0;
+        }
+        return (liquidBalance - proceeds) * 10 ** 18 / assetValue;
+    }

     function simulateTransaction(
         address repoToken,
         uint256 amount
     ) external view returns (
         uint256 simulatedWeightedMaturity, 
         uint256 simulatedRepoTokenConcentrationRatio,
         uint256 simulatedLiquidityRatio
     ) {
         // ... (existing code)

-        uint256 assetValue = _totalAssetValue(liquidBalance);
-
-        if (assetValue == 0) {simulatedLiquidityRatio = 0;}
-        else {
-            simulatedLiquidityRatio = (liquidBalance - proceeds) * 10 ** 18 / assetValue;
-        }
+        simulatedLiquidityRatio = _calculateLiquidityRatio(liquidBalance, proceeds, _totalAssetValue(liquidBalance));

         // ... (rest of the function)
     }

This refactoring would improve code readability and make it easier to reuse this calculation if needed elsewhere in the contract.

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 32426d1 and 07c58c4.

Files selected for processing (1)

• src/Strategy.sol (1 hunks)