Wrapped Native Integration Generator

Generate Solidity contracts that interact with the Wrapped Native (WNATIVE) contract at 0x6000030000842044000077551D00cfc6b4005900.

Project Setup

Before generating code, check the user’s project is configured:

1. Foundry: foundry.toml must exist. If not: forge init
2. Wrapped Native: lib/wrapped-native/ must exist. If not: forge install limitbreakinc/wrapped-native
3. Remappings: remappings.txt needs @limitbreak/wrapped-native/=lib/wrapped-native/. Append if missing – do not overwrite existing entries.
4. Local testing: For local development, use apptoken-dev to bootstrap an Anvil node with all Apptoken protocols at their deterministic addresses – see apptoken-general/references/project-setup.md.

Instructions

1. Parse integration requirements from $ARGUMENTS

2. Resolve ambiguities before generating – if $ARGUMENTS doesn’t make the integration pattern clear (basic wrapping vs permits vs gas sponsorship), or references external addresses (fee recipients, operators) without specifying them, ask in a single message. If clear, proceed.

3. Determine the integration pattern based on what the user needs:
   • Basic wrapping/unwrapping: Deposit, withdraw, depositTo, withdrawSplit
   • Payable ERC-20 operations: Combined deposit+approve, deposit+transfer
   • Permit-based gasless transfers: EIP-712 signatures for permitTransfer
   • Gas sponsorship / permitted withdrawals: doPermittedWithdraw with convenience fees
   • Protocol integration: Using WNATIVE as a payment or reserve token
4. Generate the integration contract with:
   • Correct interface import (IWrappedNative for basic, IWrappedNativeExtended for permits/enhanced features)
   • Proper use of payable functions when combining deposit + action
   • Native token handling (receive() if the contract needs to accept unwrapped native)
   • EIP-712 signature construction if using permits
5. Handle key integration details:
   • WNATIVE address is deterministic: 0x6000030000842044000077551D00cfc6b4005900
   • When calling payable transferFrom with msg.value, deposits credit the from address, NOT msg.sender
   • Same for permitTransfer – deposits credit from
   • Contracts receiving native tokens from withdraw/withdrawToAccount must have a receive() or fallback() function
   • withdrawSplit arrays must be equal length
6. Generate a Foundry test if the integration involves non-trivial logic (permits, fee calculations, multi-step flows).

Reference Files

• references/integration-patterns.md – Common integration patterns with annotated Solidity examples
• Protocol knowledge: wrapped-native-protocol

Common Mistakes

• Forgetting that payable transferFrom and permitTransfer credit deposits to from, not msg.sender – operator contracts will not receive the deposited funds
• Not implementing receive() on contracts that call withdraw or withdrawToAccount to themselves – the native transfer will revert
• Using WETH9’s deposit() pattern (call + value) when depositTo would be more gas-efficient for crediting another address
• Signing permits with the wrong domain separator – must use name "Wrapped Native", version "1", and the deterministic contract address
• Not checking isNonceUsed before submitting a permit transaction – the nonce may have been revoked or already consumed

When to Use This vs Other Skills

• This skill (wrapped-native-integrator): Generate contracts that wrap, unwrap, transfer, or permit WNATIVE tokens. Use when the core task is interacting with the Wrapped Native contract.
• lbamm-integrator: Use when building swap/liquidity integrations with LBAMM. If the pool uses WNATIVE, the LBAMM integrator handles the wrapping internally.
• tokenmaster-integrator: Use when building buy/sell/spend flows against TokenMaster. If the reserve asset is WNATIVE, the TokenMaster integrator handles it.
• payment-processor-exchange: Use when building NFT marketplace integrations. Payment Processor accepts WNATIVE directly.

Related Skills

• wrapped-native-protocol – Deep protocol knowledge, full API reference, permit system details
• lbamm-integrator – DEX integration (LBAMM pools may use WNATIVE)
• tokenmaster-integrator – Token economy integration (pools may use WNATIVE as reserve)