migrate spot user to UsdClassTransfer

https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/api/exchange-endpoint#transfer-from-spot-account-to-perp-account-and-vice-versa

hyperliquid-dex/hyperliquid-python-sdk#76

Author: luca992

src/exchange/actions.rs

@@ -293,15 +293,22 @@ impl Eip712 for SpotSend {
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(rename_all = "camelCase")]
-pub struct SpotUser {
-    pub class_transfer: ClassTransfer,
+pub struct UsdClassTransfer {
+    pub hyperliquid_chain: String,
+    pub amount: String,
+    pub to_perp: bool,
+    pub nonce: u64,
 }
 
-#[derive(Serialize, Deserialize, Debug, Clone)]
-#[serde(rename_all = "camelCase")]
-pub struct ClassTransfer {
-    pub usdc: u64,
-    pub to_perp: bool,
+impl UsdClassTransfer {
+    pub fn new(hyperliquid_chain: HyperliquidChain, amount: String, to_perp: bool) -> Self {
+        Self {
+            hyperliquid_chain: hyperliquid_chain.action_chain_name(),
+            amount,
+            to_perp,
+            nonce: next_nonce(),
+        }
+    }
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]

src/exchange/exchange_client.rs

@@ -19,8 +19,8 @@ use crate::{
         sign_l1_action, sign_multi_sig_action, sign_multi_sig_l1_action_payload, sign_typed_data,
         sign_typed_data_multi_sig,
     },
-    BulkCancelCloid, ClassTransfer, Error, ExchangeResponseStatus, HyperliquidChain,
-    MultiSigExtension, SpotSend, SpotUser, VaultTransfer, Withdraw3,
+    BulkCancelCloid, Error, ExchangeResponseStatus, HyperliquidChain, MultiSigExtension, SpotSend,
+    UsdClassTransfer, VaultTransfer, Withdraw3,
 };
 use alloy::{
     hex,
@@ -123,7 +123,7 @@ pub enum Actions {
     BatchModify(BulkModify),
     ApproveAgent(ApproveAgent),
     Withdraw3(Withdraw3),
-    SpotUser(SpotUser),
+    UsdClassTransfer(UsdClassTransfer),
     SendAsset(SendAsset),
     VaultTransfer(VaultTransfer),
     SpotSend(SpotSend),
@@ -237,7 +237,7 @@ impl ExchangeClient {
                 | Actions::Withdraw3(_)
                 | Actions::SpotSend(_)
                 | Actions::SendAsset(_)
-                | Actions::SpotUser(_)
+                | Actions::UsdClassTransfer(_)
         )
     }
 
@@ -322,19 +322,19 @@ impl ExchangeClient {
 
     pub async fn class_transfer(
         &self,
-        usdc: f64,
+        amount: f64,
         to_perp: bool,
         wallet: Option<&PrivateKeySigner>,
     ) -> Result<ExchangeResponseStatus> {
-        // payload expects usdc without decimals
-        let usdc = (usdc * 1e6).round() as u64;
         let wallet = wallet.unwrap_or(&self.wallet);
 
         let timestamp = next_nonce();
 
-        let action = Actions::SpotUser(SpotUser {
-            class_transfer: ClassTransfer { usdc, to_perp },
-        });
+        let action = Actions::UsdClassTransfer(UsdClassTransfer::new(
+            self.http_client.chain,
+            amount.to_string(),
+            to_perp,
+        ));
         let connection_id = action.hash(timestamp, self.vault_address, self.expires_after)?;
         let is_mainnet = self.http_client.is_mainnet();
         let signature = sign_l1_action(wallet, connection_id, is_mainnet)?;