Add modify order (#58)

Allows modifying (replacing) an order

See
https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/api/exchange-endpoint#modify-an-order

src/exchange/actions.rs

@@ -1,4 +1,4 @@
-use crate::exchange::{cancel::CancelRequest, order::OrderRequest};
+use crate::exchange::{cancel::CancelRequest, modify::ModifyRequest, order::OrderRequest};
 pub(crate) use ethers::{
     abi::{encode, ParamType, Tokenizable},
     types::{
@@ -107,6 +107,12 @@ pub struct BulkCancel {
     pub cancels: Vec<CancelRequest>,
 }
 
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct BulkModify {
+    pub modifies: Vec<ModifyRequest>,
+}
+
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(rename_all = "camelCase")]
 pub struct BulkCancelCloid {

src/exchange/exchange_client.rs

@@ -2,10 +2,11 @@ use crate::signature::sign_typed_data;
 use crate::{
     exchange::{
         actions::{
-            ApproveAgent, BulkCancel, BulkOrder, SetReferrer, UpdateIsolatedMargin, UpdateLeverage,
-            UsdSend,
+            ApproveAgent, BulkCancel, BulkModify, BulkOrder, SetReferrer, UpdateIsolatedMargin,
+            UpdateLeverage, UsdSend,
         },
         cancel::{CancelRequest, CancelRequestCloid},
+        modify::{ClientModifyRequest, ModifyRequest},
         ClientCancelRequest, ClientOrderRequest,
     },
     helpers::{generate_random_key, next_nonce, uuid_to_hex_string},
@@ -58,6 +59,7 @@ pub enum Actions {
     Order(BulkOrder),
     Cancel(BulkCancel),
     CancelByCloid(BulkCancelCloid),
+    BatchModify(BulkModify),
     ApproveAgent(ApproveAgent),
     Withdraw3(Withdraw3),
     SpotUser(SpotUser),
@@ -427,6 +429,42 @@ impl ExchangeClient {
         self.post(action, signature, timestamp).await
     }
 
+    pub async fn modify(
+        &self,
+        modify: ClientModifyRequest,
+        wallet: Option<&LocalWallet>,
+    ) -> Result<ExchangeResponseStatus> {
+        self.bulk_modify(vec![modify], wallet).await
+    }
+
+    pub async fn bulk_modify(
+        &self,
+        modifies: Vec<ClientModifyRequest>,
+        wallet: Option<&LocalWallet>,
+    ) -> Result<ExchangeResponseStatus> {
+        let wallet = wallet.unwrap_or(&self.wallet);
+        let timestamp = next_nonce();
+
+        let mut transformed_modifies = Vec::new();
+        for modify in modifies.into_iter() {
+            transformed_modifies.push(ModifyRequest {
+                oid: modify.oid,
+                order: modify.order.convert(&self.coin_to_asset)?,
+            });
+        }
+
+        let action = Actions::BatchModify(BulkModify {
+            modifies: transformed_modifies,
+        });
+        let connection_id = action.hash(timestamp, self.vault_address)?;
+
+        let action = serde_json::to_value(&action).map_err(|e| Error::JsonParse(e.to_string()))?;
+        let is_mainnet = self.http_client.is_mainnet();
+        let signature = sign_l1_action(wallet, connection_id, is_mainnet)?;
+
+        self.post(action, signature, timestamp).await
+    }
+
     pub async fn cancel_by_cloid(
         &self,
         cancel: ClientCancelRequestCloid,

src/exchange/mod.rs

@@ -2,12 +2,14 @@ mod actions;
 mod cancel;
 mod exchange_client;
 mod exchange_responses;
+mod modify;
 mod order;
 
 pub use actions::*;
 pub use cancel::{ClientCancelRequest, ClientCancelRequestCloid};
 pub use exchange_client::*;
 pub use exchange_responses::*;
+pub use modify::{ClientModifyRequest, ModifyRequest};
 pub use order::{
     ClientLimit, ClientOrder, ClientOrderRequest, ClientTrigger, MarketCloseParams,
     MarketOrderParams, Order,

src/exchange/modify.rs

@@ -0,0 +1,13 @@
+use super::{order::OrderRequest, ClientOrderRequest};
+use serde::{Deserialize, Serialize};
+
+pub struct ClientModifyRequest {
+    pub oid: u64,
+    pub order: ClientOrderRequest,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct ModifyRequest {
+    pub oid: u64,
+    pub order: OrderRequest,
+}