Method hash_struct

crates/model/src/order.rs:236–257

Returns the value of hashStruct() over the order data as defined by EIP-712. https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct

(&self)

    ///
    /// https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct
    pub fn hash_struct(&self) -> [u8; 32] {
        let mut hash_data = [0u8; 416];
        hash_data[0..32].copy_from_slice(&Self::TYPE_HASH);
        // Some slots are not assigned (stay 0) because all values are extended to 256
        // bits.
        hash_data[44..64].copy_from_slice(self.sell_token.as_slice());
        hash_data[76..96].copy_from_slice(self.buy_token.as_slice());
        hash_data[108..128].copy_from_slice(self.receiver.unwrap_or(Address::ZERO).as_slice());
        hash_data[128..160].copy_from_slice(&self.sell_amount.to_be_bytes::<32>());
        hash_data[160..192].copy_from_slice(&self.buy_amount.to_be_bytes::<32>());
        hash_data[220..224].copy_from_slice(&self.valid_to.to_be_bytes());
        hash_data[224..256].copy_from_slice(&self.app_data.0);
        hash_data[256..288].copy_from_slice(&self.fee_amount.to_be_bytes::<32>());
        hash_data[288..320].copy_from_slice(match self.kind {
            OrderKind::Sell => &OrderKind::SELL,
            OrderKind::Buy => &OrderKind::BUY,
        });
        hash_data[351] = self.partially_fillable as u8;
        hash_data[352..384].copy_from_slice(&self.sell_token_balance.as_bytes());
        hash_data[384..416].copy_from_slice(&self.buy_token_balance.as_bytes());
        *keccak256(hash_data)
    }

    pub fn token_pair(&self) -> Option<TokenPair> {
        TokenPair::new(self.buy_token, self.sell_token)