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Vault contract

Overview​

The Vault contract stores all tokens and supports internal transfers to save gas. It allows deposits and withdrawals of ETH and ERC20 tokens, including WETH.

Dependences​

IWETH​

Interface for WETH operations (withdraw and deposit).

IERC20​

Interface for standard ERC20 operations (balanceOf, transferFrom).

TransferHelper​

Library for safe transfer operations of ETH and ERC20 tokens.

ReentrancyGuard​

Library to prevent reentrancy attacks.

State Variables​

NATIVE_ETH​

Address representing native ETH (constant set to zero address).

wETH​

Address of the WETH token contract.

balances​

Mapping to store balances of tokens for each account (token -> account -> balance).

reserves​

Mapping to store reserves of tokens (token -> reserve).

Functions​

_wETH​

Address of the WETH token contract.

receive​

This fallback function allows the contract to receive ETH directly. If the sender is not the WETH contract, it deposits the ETH as native ETH.

balanceOf​

Returns the balance of a specific token for a given account.

deposit​

Deposits a specified token into the contract.

depositETH​

Deposits ETH into the contract.

transferAndDeposit​

Transfers a specified token from the sender to the contract and deposits it.

transfer​

Transfers a specified amount of a token from the sender to a recipient.

withdraw​

Withdraws a specified token from the contract to a recipient.

withdrawETH​

Withdraws ETH from the contract to a recipient.

_wrapAndTransferWETH​

Wraps native ETH to WETH and transfers it to a recipient.