Add in Evm User Modify method for exchange client (#114)

- currently the rust sdk lags the python sdk for quite a few endpoints
w/ evm user modify being especially painful
- simple PR adds in the user modify method for big blocks on HL EVM
- this has been tested live and works for HL mainnet

Author: andrew-manifold

rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly"

src/bin/using_big_blocks.rs

@@ -0,0 +1,22 @@
+use ethers::signers::LocalWallet;
+use hyperliquid_rust_sdk::{BaseUrl, ExchangeClient};
+use log::info;
+
+#[tokio::main]
+async fn main() {
+    env_logger::init();
+    // Key was randomly generated for testing and shouldn't be used with any real funds
+    let wallet: LocalWallet = "e908f86dbb4d55ac876378565aafeabc187f6690f046459397b17d9b9a19688e"
+        .parse()
+        .unwrap();
+
+    let exchange_client = ExchangeClient::new(None, wallet.clone(), Some(BaseUrl::Testnet), None, None)
+        .await
+        .unwrap();
+
+    let res = exchange_client
+        .enable_big_blocks(false, Some(&wallet))
+        .await
+        .unwrap();
+    info!("enable big blocks : {res:?}");
+}

src/exchange/actions.rs

@@ -296,6 +296,13 @@ pub struct SetReferrer {
     pub code: String,
 }
 
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct EvmUserModify {
+    pub using_big_blocks: bool,
+}
+
+
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(rename_all = "camelCase")]
 pub struct ApproveBuilderFee {

src/exchange/exchange_client.rs

@@ -30,7 +30,7 @@ use std::collections::HashMap;
 
 use super::cancel::ClientCancelRequestCloid;
 use super::order::{MarketCloseParams, MarketOrderParams};
-use super::{BuilderInfo, ClientLimit, ClientOrder};
+use super::{BuilderInfo, ClientLimit, ClientOrder, EvmUserModify};
 
 #[derive(Debug)]
 pub struct ExchangeClient {
@@ -68,6 +68,7 @@ pub enum Actions {
     SpotSend(SpotSend),
     SetReferrer(SetReferrer),
     ApproveBuilderFee(ApproveBuilderFee),
+    EvmUserModify(EvmUserModify),
 }
 
 impl Actions {
@@ -149,6 +150,26 @@ impl ExchangeClient {
         serde_json::from_str(output).map_err(|e| Error::JsonParse(e.to_string()))
     }
 
+    pub async fn enable_big_blocks(
+        &self,
+        using_big_blocks: bool,
+        wallet: Option<&LocalWallet>,
+    ) -> Result<ExchangeResponseStatus> {
+        let wallet = wallet.unwrap_or(&self.wallet);
+
+        let timestamp = next_nonce();
+
+        let action = Actions::EvmUserModify(EvmUserModify {
+            using_big_blocks,
+        });
+        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 usdc_transfer(
         &self,
         amount: &str,