add serai rpc methods

substrate/primitives/src/dex.rs

@@ -0,0 +1,19 @@
+#[cfg(feature = "borsh")]
+use borsh::{BorshSerialize, BorshDeserialize};
+#[cfg(feature = "serde")]
+use serde::{Serialize, Deserialize};
+
+use scale::{Encode, Decode, MaxEncodedLen};
+
+use crate::{Coin, SubstrateAmount};
+
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Encode, Decode, MaxEncodedLen)]
+#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct QuotePriceParams {
+  pub coin1: Coin,
+  pub coin2: Coin,
+  pub amount: SubstrateAmount,
+  pub include_fee: bool,
+  pub exact_in: bool,
+}

substrate/primitives/src/lib.rs

@@ -40,6 +40,10 @@ pub use account::*;
 mod constants;
 pub use constants::*;
 
+mod dex;
+#[allow(unused_imports)]
+pub use dex::*;
+
 pub type BlockNumber = u64;
 pub type Header = sp_runtime::generic::Header<BlockNumber, sp_runtime::traits::BlakeTwo256>;