[Nexus 2.0.0] Release Nexus 2.0.0 : EIP-7702 + EP v0.8

[filmakarov]

Contains the following features:

• EIP-7702 Support for validateUserOp: feat: add eip7702 support #227
• EIP-7702 Support for Module Enable Mode: Make Module Enable Mode compatible with 7702 #236
• Pre-validation Hooks for Resource Locking: feat: add prevalidation hook support #232
• Secure batch decode implementation #235
• ERC-7821 support #239
• Pre issued 1271 sigs handling #238 : Handle signature issued by an EOA prior to delegating to Nexus
• AA-508 // Prepare for EIP-712 userOpHash #237
• ERC-7779 support v 0.1 #231
• Add Nick's method support on initialization #241
• Test 7702 via proper code etching with Prague hardfork #244

Will be merged soon:

• [Nexus 2.0.0] Add Default Validator and clean 7702 init flows (AA-521) #243
• AA-466 // Prevent initcode front-running  #233

See according PR's for details

Todo

• Clean to reduce size, now OVER deployment limit
• Add tests for Nick's 7702 account initialization flow
• Remove K1 validator, factory, tests (some tests can be moved to MEE k1 repo)

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PR-Codex overview

This PR primarily focuses on enhancing the Nexus smart contract system by refining modules, improving signature validation, and adding new features for account management and execution.

Detailed summary

• Updated accountId from biconomy.nexus.1.0.0 to biconomy.nexus.2.0.0 in multiple tests and contracts.
• Added EmergencyUninstall struct in DataTypes.sol.
• Introduced MockAccountLocker and MockPreValidationHook contracts.
• Improved signature handling in MockMultiModule and related tests.
• Updated NexusProxy and added proxy deployment logic in ProxyLib.
• Implemented batch execution tests in TestAccountExecution_ExecuteBatch.
• Added pre-validation hooks for ERC-1271 and ERC-4337.
• Enhanced error handling with new custom errors in various contracts.
• Refined gas settings and EVM version in configuration files.

The following files were skipped due to too many changes: test/foundry/unit/concrete/factory/TestK1ValidatorFactory_Deployments.t.sol, test/hardhat/smart-account/Nexus.Basics.specs.ts, test/foundry/unit/concrete/factory/TestAccountFactory_Deployments.t.sol, contracts/factory/RegistryFactory.sol, contracts/mocks/MockResourceLockPreValidationHook.sol, test/foundry/unit/concrete/nexus-sentinel-list/NexusSentinelListLib_Test.t.sol, contracts/factory/K1ValidatorFactory.sol, contracts/mocks/MockPreValidationHookMultiplexer.sol, contracts/lib/ExecLib.sol, test/foundry/unit/concrete/erc1271/TestERC1271Account_MockProtocol.t.sol, contracts/mocks/Mock7739PreValidationHook.sol, contracts/lib/NexusSentinelList.sol, test/foundry/integration/TestNexusPreValidation_Integration_ResourceLockHooks.t.sol, test/foundry/utils/TestHelper.t.sol, test/foundry/integration/TestNexusPreValidation_Integration_Multiplexer.t.sol, test/foundry/unit/concrete/modulemanager/TestModuleManager_EnableMode.t.sol, test/foundry/unit/concrete/eip7702/TestEIP7702.t.sol, contracts/Nexus.sol, contracts/base/ModuleManager.sol, test/foundry/unit/concrete/hook/TestNexus_Hook_Emergency_Uninstall.sol

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[openzeppelin-code]

EIP-7702 + EP v0.8 Pre Release

Generated at commit: 2985f98b9ed0762644015fd73edcc65409ffb945

🚨 Report Summary

	Severity Level	Results
Contracts	Critical High Medium Low Note Total	1 1 0 7 30 39

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For more details view the full report in OpenZeppelin Code Inspector

[github-actions]

🤖 Slither Analysis Report 🔎

Slither report

Details

# Slither report

THIS CHECKLIST IS NOT COMPLETE. Use --show-ignored-findings to show all the results.
Summary
🟡 - locked-ether (1 results) (Medium)
🟡 - unused-return (1 results) (Medium)

• constable-states (2 results) (Optimization)

locked-ether

🟡 Impact: Medium
🔴 Confidence: High

• ID-0
  Contract locking ether found:
  Contract NexusBootstrap has payable functions:
  • ModuleManager.receive()
  • ModuleManager.fallback(bytes)
  • NexusBootstrap.initNexusWithSingleValidator(IModule,bytes,IERC7484,address[],uint8)
  • NexusBootstrap.initNexus(BootstrapConfig[],BootstrapConfig[],BootstrapConfig,BootstrapConfig[],IERC7484,address[],uint8)
  • NexusBootstrap.initNexusScoped(BootstrapConfig[],BootstrapConfig,IERC7484,address[],uint8)
    But does not have a function to withdraw the ether

utils/NexusBootstrap.sol#L33-L189

unused-return

🟡 Impact: Medium
🟡 Confidence: Medium

• ID-1
  ExecLib.hashExecutionBatch(Execution[]) ignores return value by a.set(i,executions[i].hashExecution())

lib/ExecLib.sol#L125-L139

constable-states

Impact: Optimization
🔴 Confidence: High

• ID-2
  RegistryAdapter.registry should be constant

base/RegistryAdapter.sol#L10

• ID-3
  RegistryFactory.threshold should be constant

factory/RegistryFactory.sol#L38

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