Merge branch 'feat/chainlink' of github.com:morpho-labs/morpho-blue-oracles into merlin-review

Author: MerlinEgalite

src/chainlink/Oracle4.sol renamed to src/chainlink/OracleFourFeeds.sol

@@ -5,12 +5,12 @@ import {IOracle} from "morpho-blue/interfaces/IOracle.sol";
 
 import {AggregatorV3Interface, DataFeedLib} from "./libraries/DataFeedLib.sol";
 
-/// @title Oracle4
+/// @title OracleFourFeeds
 /// @author Morpho Labs
 /// @custom:contact [email protected]
 /// @notice Oracle using 4 Chainlink-compliant feeds to compute the price of a collateral token quoted in a borrowable
 /// token within a Morpho Blue market.
-contract Oracle4 is IOracle {
+contract OracleFourFeeds is IOracle {
     using DataFeedLib for AggregatorV3Interface;
 
     /* IMMUTABLES */

src/chainlink/Oracle2.sol renamed to src/chainlink/OracleTwoFeeds.sol

@@ -5,12 +5,12 @@ import {IOracle} from "morpho-blue/interfaces/IOracle.sol";
 
 import {AggregatorV3Interface, DataFeedLib} from "./libraries/DataFeedLib.sol";
 
-/// @title Oracle2
+/// @title OracleTwoFeeds
 /// @author Morpho Labs
 /// @custom:contact [email protected]
 /// @notice Oracle using 2 Chainlink-compliant feeds to compute the price of a collateral token quoted in a borrowable
 /// token within a Morpho Blue market.
-contract Oracle2 is IOracle {
+contract OracleTwoFeeds is IOracle {
     using DataFeedLib for AggregatorV3Interface;
 
     /* IMMUTABLES */

test/chainlink/Oracle4Test.sol renamed to test/chainlink/OracleFourFeedsTest.sol

@@ -2,7 +2,7 @@
 pragma solidity ^0.8.0;
 
 import "forge-std/Test.sol";
-import "src/chainlink/Oracle4.sol";
+import "src/chainlink/OracleFourFeeds.sol";
 import "src/chainlink/libraries/ErrorsLib.sol";
 
 // 8 decimals of precision
@@ -14,13 +14,13 @@ AggregatorV3Interface constant btcEthFeed = AggregatorV3Interface(0xdeb288F73706
 // 8 decimals of precision
 AggregatorV3Interface constant wBtcBtcFeed = AggregatorV3Interface(0xfdFD9C85aD200c506Cf9e21F1FD8dd01932FBB23);
 
-contract OracleTest is Test {
+contract OracleFourFeedsTest is Test {
     function setUp() public {
         vm.selectFork(vm.createFork(vm.envString("ETH_RPC_URL")));
     }
 
     function testOracleWbtcUsdc() public {
-        Oracle4 oracle = new Oracle4(wBtcBtcFeed, btcUsdFeed, usdcUsdFeed, AggregatorV3Interface(address(0)), 8, 6);
+        OracleFourFeeds oracle = new OracleFourFeeds(wBtcBtcFeed, btcUsdFeed, usdcUsdFeed, AggregatorV3Interface(address(0)), 8, 6);
         (, int256 firstBaseAnswer,,,) = wBtcBtcFeed.latestRoundData();
         (, int256 secondBaseAnswer,,,) = btcUsdFeed.latestRoundData();
         (, int256 quoteAnswer,,,) = usdcUsdFeed.latestRoundData();
@@ -32,7 +32,7 @@ contract OracleTest is Test {
     }
 
     function testOracleUsdcWbtc() public {
-        Oracle4 oracle = new Oracle4(usdcUsdFeed, AggregatorV3Interface(address(0)), wBtcBtcFeed, btcUsdFeed, 6, 8);
+        OracleFourFeeds oracle = new OracleFourFeeds(usdcUsdFeed, AggregatorV3Interface(address(0)), wBtcBtcFeed, btcUsdFeed, 6, 8);
         (, int256 baseAnswer,,,) = usdcUsdFeed.latestRoundData();
         (, int256 firstQuoteAnswer,,,) = wBtcBtcFeed.latestRoundData();
         (, int256 secondQuoteAnswer,,,) = btcUsdFeed.latestRoundData();
@@ -44,8 +44,8 @@ contract OracleTest is Test {
     }
 
     function testOracleWbtcEth() public {
-        Oracle4 oracle =
-        new Oracle4(wBtcBtcFeed, btcEthFeed, AggregatorV3Interface(address(0)), AggregatorV3Interface(address(0)), 8, 18);
+        OracleFourFeeds oracle =
+        new OracleFourFeeds(wBtcBtcFeed, btcEthFeed, AggregatorV3Interface(address(0)), AggregatorV3Interface(address(0)), 8, 18);
         (, int256 firstBaseAnswer,,,) = wBtcBtcFeed.latestRoundData();
         (, int256 secondBaseAnswer,,,) = btcEthFeed.latestRoundData();
         assertEq(oracle.price(), (uint256(firstBaseAnswer) * uint256(secondBaseAnswer) * 10 ** (36 + 18 - 8 - 8 - 18)));

test/chainlink/Oracle2Test.sol renamed to test/chainlink/OracleTwoFeedsTest.sol

@@ -2,7 +2,7 @@
 pragma solidity ^0.8.0;
 
 import "forge-std/Test.sol";
-import "src/chainlink/Oracle2.sol";
+import "src/chainlink/OracleTwoFeeds.sol";
 import "src/chainlink/libraries/ErrorsLib.sol";
 
 // 18 decimals of precision
@@ -30,48 +30,49 @@ contract FakeAggregator {
     }
 }
 
-contract OracleTest is Test {
+contract OracleTwoFeedsTest is Test {
     function setUp() public {
         vm.selectFork(vm.createFork(vm.envString("ETH_RPC_URL")));
     }
 
     function testOracleStEthUsdc() public {
-        Oracle2 oracle = new Oracle2(stEthEthFeed, usdcEthFeed, 18, 6);
+        OracleTwoFeeds oracle = new OracleTwoFeeds(stEthEthFeed, usdcEthFeed, 18, 6);
         (, int256 baseAnswer,,,) = stEthEthFeed.latestRoundData();
         (, int256 quoteAnswer,,,) = usdcEthFeed.latestRoundData();
         assertEq(oracle.price(), uint256(baseAnswer) * 10 ** (36 + 18 + 6 - 18 - 18) / uint256(quoteAnswer));
     }
 
     function testOracleEthUsd() public {
-        Oracle2 oracle = new Oracle2(ethUsdFeed, AggregatorV3Interface(address(0)), 18, 0);
+        OracleTwoFeeds oracle = new OracleTwoFeeds(ethUsdFeed, AggregatorV3Interface(address(0)), 18, 0);
         (, int256 expectedPrice,,,) = ethUsdFeed.latestRoundData();
         assertEq(oracle.price(), uint256(expectedPrice) * 10 ** (36 - 18 - 8));
     }
 
     function testOracleStEthEth() public {
-        Oracle2 oracle = new Oracle2(stEthEthFeed, AggregatorV3Interface(address(0)), 18, 18);
+        OracleTwoFeeds oracle = new OracleTwoFeeds(stEthEthFeed, AggregatorV3Interface(address(0)), 18, 18);
         (, int256 expectedPrice,,,) = stEthEthFeed.latestRoundData();
         assertEq(oracle.price(), uint256(expectedPrice) * 10 ** (36 + 18 - 18 - 18));
         assertApproxEqRel(oracle.price(), 1e36, 0.01 ether);
     }
 
     function testOracleEthStEth() public {
-        Oracle2 oracle = new Oracle2(AggregatorV3Interface(address(0)), stEthEthFeed, 18, 18);
+        OracleTwoFeeds oracle = new OracleTwoFeeds(AggregatorV3Interface(address(0)), stEthEthFeed, 18, 18);
         (, int256 expectedPrice,,,) = stEthEthFeed.latestRoundData();
         assertEq(oracle.price(), 10 ** (36 + 18 + 18 - 18) / uint256(expectedPrice));
         assertApproxEqRel(oracle.price(), 1e36, 0.01 ether);
     }
 
     function testOracleUsdcUsd() public {
-        Oracle2 oracle = new Oracle2(usdcUsd, AggregatorV3Interface(address(0)), 6, 0);
+        OracleTwoFeeds oracle = new OracleTwoFeeds(usdcUsd, AggregatorV3Interface(address(0)), 6, 0);
         assertApproxEqRel(oracle.price(), 1e36 / 1e6, 0.01 ether);
     }
 
-    function testNegativeAnswer() public {
+    function testNegativeAnswer(int price) public {
+        vm.assume(price < 0);
         FakeAggregator aggregator = new FakeAggregator();
-        Oracle2 oracle =
-            new Oracle2(AggregatorV3Interface(address(aggregator)), AggregatorV3Interface(address(0)), 18, 0);
-        aggregator.setAnwser(-1);
+        OracleTwoFeeds oracle =
+            new OracleTwoFeeds(AggregatorV3Interface(address(aggregator)), AggregatorV3Interface(address(0)), 18, 0);
+        aggregator.setAnwser(price);
         vm.expectRevert(bytes(ErrorsLib.NEGATIVE_ANSWER));
         oracle.price();
     }