Solana settlement/settlement encoding

Cargo.toml

@@ -56,6 +56,8 @@ console-subscriber = "0.5.0"
 const_format = "0.2.32"
 const-hex = "1.17.0"
 contracts = { path = "contracts/generated/contracts-facade" }
+cow-settlement-client = "0.2"
+cow-settlement-interface = "0.2"
 cow-solana-rpc = { path = "crates/cow-solana-rpc" }
 dashmap = "6.1.0"
 database = { path = "crates/database" }
@@ -127,6 +129,7 @@ signature-validator = { path = "crates/signature-validator" }
 simulator = { path = "crates/simulator" }
 solana-client = "4"
 solana-commitment-config = "3"
+solana-compute-budget-interface = "3"
 solana-driver = { path = "crates/solana-driver" }
 solana-indexer = { path = "crates/solana-indexer" }
 solana-rpc-client = "4"
@@ -136,6 +139,7 @@ solana-testlib = { path = "crates/solana-testlib" }
 solver = { path = "crates/solver" }
 solvers = { path = "crates/solvers" }
 solvers-dto = { path = "crates/solvers-dto" }
+spl-associated-token-account-interface = "2"
 spl-token-2022-interface = "2"
 spl-token-interface = "2"
 sqlx = {

crates/solana-driver/Cargo.toml

@@ -21,6 +21,8 @@ chrono = { workspace = true, default-features = false, features = ["clock"] }
 clap = { workspace = true }
 configs = { workspace = true }
 const-hex = { workspace = true }
+cow-settlement-client = { workspace = true }
+cow-settlement-interface = { workspace = true }
 cow-solana-rpc = { workspace = true }
 futures = { workspace = true }
 humantime-serde = { workspace = true }
@@ -30,6 +32,7 @@ serde = { workspace = true }
 serde-ext = { workspace = true }
 serde_json = { workspace = true }
 serde_with = { workspace = true }
+solana-compute-budget-interface = { workspace = true }
 solana-sdk = { workspace = true }
 thiserror = { workspace = true }
 tikv-jemallocator = { workspace = true }

crates/solana-driver/example.toml

@@ -1,8 +1,8 @@
 # Example configuration for the Solana driver.
 
 [chain]
-# Placeholder — replace with the CoW Settlement program id.
-settlement-program-id = "MooohhPEAAHwAwEozL7JPEmnDvaahuUpccYN4Yb8ccK"
+# The CoW Settlement program id (v0.2.0, stable mainnet address).
+settlement-program-id = "J516Mv7YvvvJyMvNEca8tWNTJyDHbFpzwDZD96BNfR3w"
 
 [rpc]
 endpoint = "https://api.mainnet-beta.solana.com"

crates/solana-driver/src/domain/auction.rs

@@ -62,7 +62,7 @@ pub struct Auction {
 }
 
 /// One order available for solvers to fill.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub struct Order {
     pub uid: OrderUid,
     pub owner: Pubkey,
@@ -80,7 +80,7 @@ pub struct Order {
 }
 
 /// Direction of the trade.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub enum Side {
     Sell,

crates/solana-driver/src/domain/mod.rs

@@ -3,12 +3,14 @@
 pub mod auction;
 pub mod competition;
 pub mod order_uid;
+pub mod settlement;
 pub mod slot;
 pub mod solution;
 
 pub use self::{
     auction::{Auction, Id, Order, Side},
     competition::Competition,
+    settlement::Settlement,
     slot::Slot,
     solution::{Solution, Trade},
 };

crates/solana-driver/src/domain/order_uid.rs

@@ -4,7 +4,7 @@ use std::{fmt, str::FromStr};
 
 /// A 32-byte CoW Protocol order identifier, equal to `hash(intent)`, serialized
 /// as a `0x`-prefixed hex string on the wire.
-#[derive(Clone, Copy, PartialEq, Eq, Hash)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub struct OrderUid(pub [u8; 32]);
 
 impl fmt::Display for OrderUid {