Struct TransferWithAuthorization 

pub struct TransferWithAuthorization {
    pub from: [u8; 20],
    pub to: [u8; 20],
    pub value: [u8; 32],
    pub valid_after: u64,
    pub valid_before: u64,
    pub nonce: [u8; 32],
}

EIP-3009 TransferWithAuthorization for gasless token transfers.

Used by USDC and other compliant tokens. The token holder signs a typed message authorizing a relayer to execute the transfer on their behalf.

Fields

from: [u8; 20]

Token holder (sender).

to: [u8; 20]

Recipient address.

value: [u8; 32]

Transfer amount (32-byte big-endian uint256).

valid_after: u64

Earliest valid timestamp.

valid_before: u64

Latest valid timestamp.

nonce: [u8; 32]

Unique nonce (32 bytes, chosen by the authorizer).

Implementations

impl TransferWithAuthorization

pub fn type_hash() -> [u8; 32]

The EIP-712 typehash for TransferWithAuthorization.

keccak256("TransferWithAuthorization(address from,address to,uint256 value,uint256 validAfter,uint256 validBefore,bytes32 nonce)")

pub fn struct_hash(&self) -> [u8; 32]

Compute the struct hash.

pub fn signing_hash(&self, domain_separator: &[u8; 32]) -> [u8; 32]

Compute the EIP-712 signing hash.

pub fn sign( &self, signer: &EthereumSigner, domain_separator: &[u8; 32], ) -> Result<EthereumSignature, SignerError>

Sign this authorization.

Trait Implementations

impl Clone for TransferWithAuthorization

fn clone(&self) -> TransferWithAuthorization

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TransferWithAuthorization

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.