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Overview

DepositWrapper contract is a utility that wraps deposits of various tokens into a specific vault asset. It allows for deposits in ETH, WETH, stETH and wstETH.

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Key Features

  • Token Conversion: Converts between ETH, WETH, stETH, and wstETH for deposits.
  • Direct Deposit: Supports direct deposits into the vault with security checks.
  • Allowance Management: Adjusts ERC20 allowances securely before deposit.

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Core Methods

  1. Deposit Function
    • deposit(address, address, uint256, uint256, uint256): Facilitates deposits into the vault after converting tokens.
      • to: The address receiving LP tokens after the deposit.
      • token: The address of the input token (WETH, stETH, wstETH, or native ETH).
      • amount: The amount of the input token.
      • minLpAmount: Minimum acceptable amount of LP tokens to be minted.
      • deadline: Time before which the deposit must be completed.
      • Returns: The amount of LP tokens minted.
      • Errors:
        • InvalidTokenList: If the vault does not exclusively accept wstETH.
        • InvalidAmount: If the input amount is zero or doesn’t match msg.value for ETH.
        • InvalidToken: If the input token is not recognized.
      • Event:
        • DepositWrapperDeposit(address, address, uint256, uint256, uint256): Emitted after a successful deposit.
          • sender: Address of the sender.
          • token: Address of the input token.
          • amount: Amount deposited.
          • lpAmount: Amount of LP tokens minted.
          • deadline: Deadline of the deposit operation.
  2. Conversion Helpers
    • _wethToWsteth(uint256): Converts WETH to wstETH through stETH.
    • _ethToSteth(uint256): Converts native ETH to stETH.
    • _stethToWsteth(uint256): Converts stETH to wstETH.
  3. Fallback Method
    • receive(): Allows receiving ETH only from the WETH contract.
      • Error:
        • InvalidSender: Raised if ETH is received from an address other than WETH.