ERC-4626 Tokenized Vault Standard
கடைசியாகத் திருத்தப்பட்டது: @raxhvl(opens in a new tab), 8 மே, 2024
Introduction
ERC-4626 is a standard to optimize and unify the technical parameters of yield-bearing vaults. It provides a standard API for tokenized yield-bearing vaults that represent shares of a single underlying ERC-20 token. ERC-4626 also outlines an optional extension for tokenized vaults utilizing ERC-20, offering basic functionality for depositing, withdrawing tokens and reading balances.
The role of ERC-4626 in yield-bearing vaults
Lending markets, aggregators, and intrinsically interest-bearing tokens help users find the best yield on their crypto tokens by executing different strategies. These strategies are done with slight variation, which might be error-prone or waste development resources.
ERC-4626 in yield-bearing vaults will lower the integration effort and unlock access to yield in various applications with little specialized effort from developers by creating more consistent and robust implementation patterns.
The ERC-4626 token is described fully in EIP-4626(opens in a new tab).
Prerequisites
To better understand this page, we recommend you first read about token standards and ERC-20.
ERC-4626 Functions and Features:
Methods
asset
1function asset() public view returns (address assetTokenAddress)நகலெடு
This function returns the address of the underlying token used for the vault for accounting, depositing, withdrawing.
totalAssets
1function totalAssets() public view returns (uint256)நகலெடு
This function returns the total amount of underlying assets held by the vault.
convertToShares
1function convertToShares(uint256 assets) public view returns (uint256 shares)நகலெடு
This function returns the amount of shares
that would be exchanged by the vault for the amount of assets
provided.
convertToAssets
1function convertToAssets(uint256 shares) public view returns (uint256 assets)நகலெடு
This function returns the amount of assets
that would be exchanged by the vault for the amount of shares
provided.
maxDeposit
1function maxDeposit(address receiver) public view returns (uint256 maxAssets)நகலெடு
This function returns the maximum amount of underlying assets that can be deposited in a single deposit
call by the receiver
.
previewDeposit
1function previewDeposit(uint256 assets) public view returns (uint256 shares)நகலெடு
This function allows users to simulate the effects of their deposit at the current block.
deposit
1function deposit(uint256 assets, address receiver) public returns (uint256 shares)நகலெடு
This function deposits assets
of underlying tokens into the vault and grants ownership of shares
to receiver
.
maxMint
1function maxMint(address receiver) public view returns (uint256 maxShares)நகலெடு
This function returns the maximum amount of shares that can be minted in a single mint
call by the receiver
.
previewMint
1function previewMint(uint256 shares) public view returns (uint256 assets)நகலெடு
This function allows users to simulate the effects of their mint at the current block.
mint
1function mint(uint256 shares, address receiver) public returns (uint256 assets)நகலெடு
This function mints exactly shares
vault shares to receiver
by depositing assets
of underlying tokens.
maxWithdraw
1function maxWithdraw(address owner) public view returns (uint256 maxAssets)நகலெடு
This function returns the maximum amount of underlying assets that can be withdrawn from the owner
balance with a single withdraw
call.
previewWithdraw
1function previewWithdraw(uint256 assets) public view returns (uint256 shares)நகலெடு
This function allows users to simulate the effects of their withdrawal at the current block.
withdraw
1function withdraw(uint256 assets, address receiver, address owner) public returns (uint256 shares)நகலெடு
This function burns shares
from owner
and send exactly assets
token from the vault to receiver
.
maxRedeem
1function maxRedeem(address owner) public view returns (uint256 maxShares)நகலெடு
This function returns the maximum amount of shares that can be redeemed from the owner
balance through a redeem
call.
previewRedeem
1function previewRedeem(uint256 shares) public view returns (uint256 assets)நகலெடு
This function allows users to simulate the effects of their redemption at the current block.
redeem
1function redeem(uint256 shares, address receiver, address owner) public returns (uint256 assets)நகலெடு
This function redeems a specific number of shares
from owner
and sends assets
of underlying token from the vault to receiver
.
totalSupply
1function totalSupply() public view returns (uint256)நகலெடு
Returns the total number of unredeemed vault shares in circulation.
balanceOf
1function balanceOf(address owner) public view returns (uint256)நகலெடு
Returns the total amount of vault shares the owner
currently has.
Map of the interface
Events
Deposit Event
MUST be emitted when tokens are deposited into the vault via the mint
and deposit
methods
1event Deposit(2 address indexed sender,3 address indexed owner,4 uint256 assets,5 uint256 shares6)நகலெடு
Where sender
is the user who exchanged assets
for shares
, and transferred those shares
to owner
.
Withdraw Event
MUST be emitted when shares are withdrawn from the vault by a depositor in the redeem
or withdraw
methods.
1event Withdraw(2 address indexed sender,3 address indexed receiver,4 address indexed owner,5 uint256 assets,6 uint256 shares7)நகலெடு
Where sender
is the user who triggered the withdrawal and exchanged shares
, owned by owner
, for assets
. receiver
is the user who received the withdrawn assets
.