chore: use toplevel out/ for importing Morpho bytecode

foundry.toml

@@ -5,7 +5,7 @@ libs = ["lib"]
 evm_version = "paris"
 fs_permissions = [
     { access = "read", path = "./config/"},
-    { access = "read", path = "./lib/morpho-blue/out/"}
+    { access = "read", path = "./out/"}
 ]
 
 [profile.default.rpc_endpoints]

hardhat.config.ts

@@ -68,14 +68,25 @@ const config: HardhatUserConfig = {
       {
         version: "0.8.21",
         settings: {
-          optimizer: {
+          optimizer: { 
             enabled: true,
             runs: 200,
           },
           viaIR: true,
           evmVersion: "paris",
-        },
+        }
       },
+      {
+        version: "0.8.19",
+        settings: {
+          optimizer: { 
+            enabled: true,
+            runs: 999999,
+          },
+          viaIR: true,
+          evmVersion: "paris",
+        }
+      }
     ],
   },
   mocha: {

src/mocks/MorphoImport.sol

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+pragma solidity 0.8.19;
+// Force foundry to compile Morpho Blue even though it's not imported by Metamorpho or by the tests.
+// Morpho Blue will be compiled with its own solidity version.
+// The resulting bytecode is then loaded by BaseTest.sol.
+
+import "../../lib/morpho-blue/src/Morpho.sol";

test/forge/helpers/BaseTest.sol

@@ -52,8 +52,7 @@ contract BaseTest is Test {
     address internal MORPHO_OWNER = makeAddr("MorphoOwner");
     address internal MORPHO_FEE_RECIPIENT = makeAddr("MorphoFeeRecipient");
 
-    IMorpho internal morpho =
-        IMorpho(deployCode("lib/morpho-blue/out/Morpho.sol/Morpho.json", abi.encode(MORPHO_OWNER)));
+    IMorpho internal morpho = IMorpho(deployCode("Morpho.sol", abi.encode(MORPHO_OWNER)));
     ERC20Mock internal loanToken = new ERC20Mock("loan", "B");
     ERC20Mock internal collateralToken = new ERC20Mock("collateral", "C");
     OracleMock internal oracle = new OracleMock();