AbstractFeeVault

Description

The base contract for holding vaults used to fulfill Liquid obligations in the event that it's own funds are not sufficient

Variables

token

• Description - The address of the asset this vault is parameterized for. For ERC-20 vaults this is the token address. For the ETH vault this holds the WETH address.
• Type - address
• Read By
  • token()

authorized

• Description - Allowlist of accounts permitted to withdraw from the vault, such as the Liquid and owner.
• Type - mapping(address => bool)
• Used By
  • onlyAuthorized
• Updated By
  • setAuthorization(address account, bool status)
• Read By
  • authorized(address)

Modifiers

onlyAuthorized

• Description - Restricts function access to addresses enabled in the authorized mapping.
• Reverts
  • Unauthorized() - when msg.sender is not authorized.

Functions

Owner Actions

setAuthorization(address account, bool status)

• Description - Enables or disables an address from the withdraw allowlist.
  • @param account - Address to authorize or de-authorize.
  • @param status - true to authorize, false to de-authorize.
• Visibility Specifier - external
• State Mutability Specifier - nonpayable
• Reverts
  • ZeroAddress() - when account == address(0).
• Emits
  • AuthorizationUpdated(address indexed account, bool status)

Internal Operations

_checkNonZeroAddress(address account)

• Description - Validates account != address(0).
• Visibility Specifier - internal
• State Mutability Specifier - pure
• Reverts
  • ZeroAddress() - when the address passed is the zero address.

_checkNonZeroAmount(uint256 amount)

• Description - Validates amount > 0.
• Visibility Specifier - internal (pure)
• State Mutability Specifier - pure
• Reverts
  • ZeroAmount() - when the amount passed is 0.

Abstract Functions

withdraw(address recipient, uint256 amount)

• Description - Transfer amount, denominated in the contracts token, of vault asset to the recipient.
  • @param recipient - Destination address.
  • @param amount - Amount to withdraw denominated in token decimals.
• Visibility Specifier - external
• State Mutability Specifier - nonpayable

totalDeposits()

• Description - Returns the total asset balance controlled by the vault.
• Visibility Specifier - external
• State Mutability Specifier - view

Events

• Deposited(address indexed from, uint256 amount) - emitted when funds are deposited into a child vault.
• Withdrawn(address indexed to, uint256 amount) - emitted when funds are withdrawn by an authorized account.
• AuthorizationUpdated(address indexed account, bool status) - emitted when an account’s authorization state changes.

Errors

• Unauthorized() - thrown when a caller attempts an action requiring authorization but is not enabled in the authorized mapping.
• ZeroAddress() - thrown when a zero address is provided where a valid nonzero address is required.
• ZeroAmount() - thrown when a function receives a zero amount where a positive value is required.
• InsufficientBalance() - thrown when the vault does not hold enough assets to fulfill a withdrawal or transfer request.