Struct CowHook 

pub struct CowHook {
    pub target: String,
    pub call_data: String,
    pub gas_limit: String,
    pub dapp_id: Option<String>,
}

A single CoW Protocol pre- or post-settlement interaction hook.

Hooks are arbitrary contract calls that the CoW settlement contract executes before (pre) or after (post) the trade. Common use cases include token approvals, NFT transfers, and flash-loan repayments.

Fields

• target — the contract address to call (0x-prefixed, 20 bytes).
• call_data — ABI-encoded function selector + arguments (0x-prefixed).
• gas_limit — maximum gas the hook may consume (decimal string).
• dapp_id — optional identifier for the dApp that registered the hook.

Example

use cow_types::CowHook;

let hook = CowHook::new("0x1234567890abcdef1234567890abcdef12345678", "0xabcdef00", "100000")
    .with_dapp_id("my-dapp");

assert!(hook.has_dapp_id());

Fields

target: String

Target contract address (checksummed hex with 0x prefix).

call_data: String

ABI-encoded call data (hex with 0x prefix).

gas_limit: String

Maximum gas this hook may consume (decimal string, e.g. "100000").

dapp_id: Option<String>

Optional dApp identifier for the hook’s origin.

Implementations

impl CowHook

pub fn new( target: impl Into<String>, call_data: impl Into<String>, gas_limit: impl Into<String>, ) -> Self

Construct a new CowHook without a dApp identifier.

pub fn with_dapp_id(self, dapp_id: impl Into<String>) -> Self

Attach a dApp identifier to this hook.

pub const fn has_dapp_id(&self) -> bool

Returns true if a dApp identifier is set on this hook.

Trait Implementations

impl Clone for CowHook

fn clone(&self) -> CowHook

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CowHook

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CowHook

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for CowHook

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

Formats the value using the given formatter.

impl Serialize for CowHook

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.