setup imports, accounts, and align versions

.gitmodules

@@ -1,3 +1,3 @@
-[submodule "lib/nexus"]
-	path = lib/nexus
-	url = https://github.com/bcnmy/nexus
+[submodule "lib/nexus.git"]
+	path = lib/nexus.git
+	url = https://github.com/bcnmy/nexus.git

.solhint.json

@@ -1,7 +1,7 @@
 {
   "extends": "solhint:recommended",
   "rules": {
-    "compiler-version": ["error", "^0.8.24"],
+    "compiler-version": ["error", "^0.8.26"],
     "func-visibility": ["warn", { "ignoreConstructors": true }],
     "reentrancy": "error",
     "state-visibility": "error",

contracts/base/BasePaymaster.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 /* solhint-disable reason-string */
 

contracts/common/Errors.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 contract BiconomySponsorshipPaymasterErrors {
 

contracts/interfaces/IBiconomySponsorshipPaymaster.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 interface IBiconomySponsorshipPaymaster {
     event PostopCostChanged(uint256 indexed _oldValue, uint256 indexed _newValue);

contracts/mocks/Imports.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 /* solhint-disable reason-string */
 

contracts/mocks/MockValidator.sol

@@ -1,3 +1,3 @@
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 import "@biconomy-devx/erc7579-msa/test/foundry/mocks/MockValidator.sol";

contracts/references/SampleVerifyingPaymaster.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 /* solhint-disable reason-string */
 /* solhint-disable no-inline-assembly */

contracts/sponsorship/SponsorshipPaymasterWithPremium.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 /* solhint-disable reason-string */
 

contracts/test/Foo.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.8.24;
+pragma solidity >=0.8.26;
 
 /**
  * @title Foo

contracts/test/Lock.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 /**
  * @title Lock

contracts/utils/SoladyOwnable.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 import {Ownable} from "solady/src/auth/Ownable.sol";
 

foundry.toml

@@ -11,7 +11,7 @@
   optimizer_runs = 1_000_000
   out = "out"
   script = "scripts"
-  solc = "0.8.24"
+  solc = "0.8.26"
   src = "contracts"
   test = "test"
   cache_path  = "cache_forge"

hardhat.config.ts

@@ -5,7 +5,7 @@ import "@bonadocs/docgen";
 
 const config: HardhatUserConfig = {
   solidity: {
-    version: "0.8.24",
+    version: "0.8.26",
     settings: {
       optimizer: {
         enabled: true,

remappings.txt

@@ -1,5 +1,6 @@
 @openzeppelin/contracts/=node_modules/@openzeppelin/contracts/
 @prb/test/=node_modules/@prb/test/
+@nexus/=lib/nexus.git/
 forge-std/=node_modules/forge-std/
 account-abstraction=node_modules/account-abstraction/
 modulekit/=node_modules/modulekit/src/

test/foundry/Lock.t.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.8.24 <0.9.0;
+pragma solidity >=0.8.26 <0.9.0;
 
 import { PRBTest } from "@prb/test/src/PRBTest.sol";
 import { Lock } from "../../contracts/test/Lock.sol";

test/foundry/SponsorshipPaymasterWithPremium.t.sol

@@ -1,9 +1,16 @@
 // SPDX-License-Identifier: Unlicensed
-pragma solidity ^0.8.24;
-import { BiconomySponsorshipPaymaster } from "../../contracts/sponsorship/SponsorshipPaymasterWithPremium.sol";
+pragma solidity ^0.8.26;
+
 import { Test } from "forge-std/src/Test.sol";
-import { StdCheats } from "forge-std/src/StdCheats.sol";
+import { Vm } from "forge-std/src/Vm.sol";
+
+import { BiconomySponsorshipPaymaster } from "../../contracts/sponsorship/SponsorshipPaymasterWithPremium.sol";
+import { NexusTestBase } from "./base/NexusTestBase.sol";
+
+contract SponsorshipPaymasterWithPremiumTest is NexusTestBase {
+    function setUp() public virtual override {
+        super.setUp();
 
-contract SponsorshipPaymasterWithPremiumTest is Test {
-
-}
+        
+    }
+}

test/foundry/base/NexusTestBase.sol

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+import { Test } from "forge-std/src/Test.sol";
+
+import { EntryPoint } from "account-abstraction/contracts/core/EntryPoint.sol";
+import { Nexus } from "@nexus/contracts/Nexus.sol";
+import { NexusAccountFactory } from "@nexus/contracts/factory/NexusAccountFactory.sol";
+
+abstract contract NexusTestBase is Test {
+    // Test Environment Configuration
+    string constant mnemonic = "test test test test test test test test test test test junk";
+    uint256 constant testAccountCount = 10;
+    uint256 constant initialMainAccountFunds = 100_000 ether;
+    uint256 constant defaultPreVerificationGas = 21_000;
+
+    uint32 nextKeyIndex;
+
+    // Test Accounts
+    struct TestAccount {
+        address payable addr;
+        uint256 privateKey;
+    }
+
+    TestAccount[] testAccounts;
+    TestAccount alice;
+    TestAccount bob;
+    TestAccount charlie;
+    TestAccount dan;
+    TestAccount emma;
+    TestAccount frank;
+    TestAccount george;
+    TestAccount henry;
+    TestAccount ida;
+
+    TestAccount owner;
+
+    // ERC7579 Contracts
+    EntryPoint entryPoint;
+    Nexus saImplementation;
+    NexusAccountFactory factory;
+
+    function getNextPrivateKey() internal returns (uint256) {
+        return vm.deriveKey(mnemonic, ++nextKeyIndex);
+    }
+
+    function setUp() public virtual {
+        // Generate Test Addresses
+        for (uint256 i = 0; i < testAccountCount; i++) {
+            uint256 privateKey = getNextPrivateKey();
+            testAccounts.push(TestAccount(payable(vm.addr(privateKey)), privateKey));
+
+            deal(testAccounts[i].addr, initialMainAccountFunds);
+        }
+
+        // Name Test Addresses
+        alice = testAccounts[0];
+        vm.label(alice.addr, string.concat("Alice", vm.toString(uint256(0))));
+
+        bob = testAccounts[1];
+        vm.label(bob.addr, string.concat("Bob", vm.toString(uint256(1))));
+
+        charlie = testAccounts[2];
+        vm.label(charlie.addr, string.concat("Charlie", vm.toString(uint256(2))));
+
+        dan = testAccounts[3];
+        vm.label(dan.addr, string.concat("Dan", vm.toString(uint256(3))));
+
+        emma = testAccounts[4];
+        vm.label(emma.addr, string.concat("Emma", vm.toString(uint256(4))));
+
+        frank = testAccounts[5];
+        vm.label(frank.addr, string.concat("Frank", vm.toString(uint256(5))));
+
+        george = testAccounts[6];
+        vm.label(george.addr, string.concat("George", vm.toString(uint256(6))));
+
+        henry = testAccounts[7];
+        vm.label(henry.addr, string.concat("Henry", vm.toString(uint256(7))));
+
+        ida = testAccounts[7];
+        vm.label(ida.addr, string.concat("Ida", vm.toString(uint256(8))));
+
+        // Name Owner
+        owner = testAccounts[8];
+        vm.label(owner.addr, string.concat("Owner", vm.toString(uint256(9))));
+    }
+}

test/foundry/mocks/Counter.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.24;
+pragma solidity ^0.8.26;
 
 contract Counter {
     uint256 private _number;