Vault USD transfer (#56)

Author: cgaspart

examples/basic_vault_transfer.py

@@ -0,0 +1,15 @@
+from hyperliquid.utils import constants
+import example_utils
+
+
+def main():
+    address, info, exchange = example_utils.setup(constants.TESTNET_API_URL, skip_ws=True)
+    testnet_HLP_vault = "0xa15099a30bbf2e68942d6f4c43d70d04faeab0a0"
+
+    # Transfer 5 usd to the HLP Vault for demonstration purposes
+    transfer_result = exchange.vault_usd_transfer(testnet_HLP_vault, True, 5_000_000)
+    print(transfer_result)
+
+
+if __name__ == "__main__":
+    main()

hyperliquid/exchange.py

@@ -427,6 +427,23 @@ def sub_account_transfer(self, sub_account_user: str, is_deposit: bool, usd: int
             signature,
             timestamp,
         )
+    
+    def vault_usd_transfer(self, vault_address: str, is_deposit: bool, usd: int) -> Any:
+        timestamp = get_timestamp_ms()
+        vault_transfer_action = {
+            "type": "vaultTransfer",
+            "vaultAddress": vault_address,
+            "isDeposit": is_deposit,
+            "usd": usd}
+        is_mainnet = self.base_url == MAINNET_API_URL
+        signature = sign_l1_action(self.wallet, vault_transfer_action, None, timestamp, is_mainnet)
+        return (
+            self._post_action(
+                vault_transfer_action,
+                signature,
+                timestamp,
+            )
+        )
 
     def usd_transfer(self, amount: float, destination: str) -> Any:
         timestamp = get_timestamp_ms()