fix: add call to irm at market creation

Author: Jean-Grimal

src/Morpho.sol

@@ -158,6 +158,9 @@ contract Morpho is IMorphoStaticTyping {
         idToMarketParams[id] = marketParams;
 
         emit EventsLib.CreateMarket(id, marketParams);
+
+        // Call Irm in case it is statefull.
+        IIrm(marketParams.irm).borrowRate(marketParams, market[id]);
     }
 
     /* SUPPLY MANAGEMENT */

test/forge/integration/CreateMarketIntegrationTest.sol

@@ -47,6 +47,8 @@ contract CreateMarketIntegrationTest is BaseTest {
         if (marketParamsFuzz.irm != marketParams.irm) morpho.enableIrm(marketParamsFuzz.irm);
         if (marketParamsFuzz.lltv != marketParams.lltv) morpho.enableLltv(marketParamsFuzz.lltv);
 
+        vm.mockCall(marketParamsFuzz.irm, abi.encodeWithSelector(IIrm.borrowRate.selector), abi.encode(0));
+
         vm.expectEmit(true, true, true, true, address(morpho));
         emit EventsLib.CreateMarket(marketParamsFuzz.id(), marketParamsFuzz);
         morpho.createMarket(marketParamsFuzz);
@@ -66,6 +68,9 @@ contract CreateMarketIntegrationTest is BaseTest {
         vm.startPrank(OWNER);
         if (marketParamsFuzz.irm != marketParams.irm) morpho.enableIrm(marketParamsFuzz.irm);
         if (marketParamsFuzz.lltv != marketParams.lltv) morpho.enableLltv(marketParamsFuzz.lltv);
+
+        vm.mockCall(marketParamsFuzz.irm, abi.encodeWithSelector(IIrm.borrowRate.selector), abi.encode(0));
+
         morpho.createMarket(marketParamsFuzz);
 
         vm.expectRevert(bytes(ErrorsLib.MARKET_ALREADY_CREATED));
@@ -81,6 +86,8 @@ contract CreateMarketIntegrationTest is BaseTest {
         if (marketParamsFuzz.irm != marketParams.irm) morpho.enableIrm(marketParamsFuzz.irm);
         if (marketParamsFuzz.lltv != marketParams.lltv) morpho.enableLltv(marketParamsFuzz.lltv);
 
+        vm.mockCall(marketParamsFuzz.irm, abi.encodeWithSelector(IIrm.borrowRate.selector), abi.encode(0));
+
         morpho.createMarket(marketParamsFuzz);
         vm.stopPrank();