feat: poc deployless oracle

[penandlim]

Describe your changes

Checklist before requesting a review

• Title follows conventional commits style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• Newly added functions follow Check-effects-interaction
• Gas usage has been minimized (ex. Storage variable access is minimized)

[github-actions]

Semgrep report

┌─────────────────┐
│ 5 Code Findings │
└─────────────────┘

src/prices/DeploylessOracle.sol
 ❱ solidity.performance.non-payable-constructor.non-payable-constructor
      Consider making costructor payable to save gas.
      Details: https://sg.run/wRBd                   
                                                     
       52┆ constructor() {
       53┆     LogPricesHelper[] memory returnData = new LogPricesHelper[](8);
       54┆     _getPrice(returnData, 0, 0x7Fd8Af959B54A677a1D8F92265Bd0714274C56a3);
       55┆     _getPrice(returnData, 1, 0x28da6dE3e804bDdF0aD237CFA6048f2930D0b4Dc);
       56┆     _getPrice(returnData, 2, 0x81d93531720d86f0491DeE7D03f30b3b5aC24e59);
       57┆     _getPrice(returnData, 3, 0x6130E6cD924a40b24703407F246966D7435D4998);
       58┆     _getPrice(returnData, 4, 0x107717C98C8125A94D3d2Cc82b86a1b705f3A27C);
       59┆     _getPrice(returnData, 5, 0x622fA41799406B120f9a40dA843D358b7b2CFEE3);
       60┆     _getPrice(returnData, 6, 0x128e72DfD8b00cbF9d12cB75E846AC87B83DdFc9);
       61┆     _getPrice(returnData, 7, 0x5943F7090282Eb66575662EADf7C60a717a7cE4D);
         [hid 14 additional lines, adjust with --max-lines-per-finding] 
                                   
src/prices/DeploylessOracleViem.sol
 ❱ solidity.performance.non-payable-constructor.non-payable-constructor
      Consider making costructor payable to save gas.
      Details: https://sg.run/wRBd                   
                                                     
       89┆ constructor() { }

 ❱ solidity.performance.array-length-outside-loop.array-length-outside-loop
      Caching the array length outside a loop saves reading it on each iteration, as long as the array's
      length is not changed during the loop.                                                            
      Details: https://sg.run/r4LJ                                                                      
                                                                                                        
       96┆ for (uint256 i = 0; i < gaugeInfo.length; i++) {

 ❱ solidity.performance.unnecessary-checked-arithmetic-in-loop.unnecessary-checked-arithmetic-in-loop
      A lot of times there is no risk that the loop counter can overflow.  Using Solidity's unchecked
      block saves the overflow checks.                                                               
      Details: https://sg.run/OvDk                                                                   
                                                                                                     
       96┆ for (uint256 i = 0; i < gaugeInfo.length; i++) {

 ❱ solidity.performance.use-prefix-increment-not-postfix.use-prefix-increment-not-postfix
      Consider using the prefix increment expression whenever the return value is not needed. The prefix
      increment expression is cheaper in terms of gas.                                                  
      Details: https://sg.run/nxLr                                                                      
                                                                                                        
       96┆ for (uint256 i = 0; i < gaugeInfo.length; i++) {

[github-actions]

Changes to gas cost

Generated at commit: 31eb775faaf792dac6f8534fef1a382ca41dbd1f, compared to commit: ca2468e76f7f9534c77d5d92d09c25e0505e7d74

🧾 Summary (10% most significant diffs)

Contract	Method	Avg (+/-)	%

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Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
DYFIRedeemer	2,139,607 (0)	receiveFlashLoan	23,419 (0)	0.00%	101,318 (-452)	-0.44%	56,732 (0)	0.00%	279,843 (0)	0.00%	1,280 (0)
SwapAndLock	1,183,769 (0)	setDYfiRedeemer	23,966 (0)	0.00%	63,711 (+2)	+0.00%	76,054 (0)	0.00%	76,289 (0)	0.00%	1,296 (0)
YearnStakingDelegate	3,689,950 (0)	deposit	26,589 (0)	0.00%	220,783 (+1)	+0.00%	241,123 (+6)	+0.00%	350,077 (0)	0.00%	3,334 (0)

[github-actions]

Slither report