Update app.py

app.py

@@ -13,12 +13,20 @@ import os
 #from helpers.mongodbconnection import provideClient
 from fastapi.concurrency import run_in_threadpool
 import pybase64
+from web3 import Web3
+import hexbytes
+
 
 
 
 app = FastAPI()
 solana_client = Client("https://devnet.helius-rpc.com/?api-key=4e833ada-d32c-48c5-b020-c11b2253f25b")
 
+ETH_RPC_URL = "https://mainnet.infura.io/v3/7ad20d8703134068a4e4563f4a5a2279"
+w3 = Web3(Web3.HTTPProvider(ETH_RPC_URL))
+
+
+
 seed_text="shellinfo"
 seed = hashlib.sha256(seed_text.encode()).digest()
 SERVER_KEY = Keypair.from_seed(seed)
@@ -31,6 +39,9 @@ class TransactionPayload(BaseModel):
 
 
 
+class EthTransactionPayload(BaseModel):
+    signed_hex: str  # The 0x... hex string from your frontend ethers.js code
+
 
 
 
@@ -254,4 +265,46 @@ async def broadcast_transaction(payload: TransactionPayload):
             "signature": '',
             "status": "Failed"
         }
+
+
+
+
+
+@app.post("/relay/broadcast/ethereum")
+async def broadcast_ethereum_transaction(payload: EthTransactionPayload):
+    """
+    Receives a signed ETH hex, strips headers, 
+    and broadcasts to the Ethereum network.
+    """
+    try:
+        # 1. Connection Check
+        if not w3.is_connected():
+            raise HTTPException(status_code=500, detail="Relayer lost connection to Ethereum Gateway")
+
+    
+        signed_tx = payload.signed_hex if payload.signed_hex.startswith("0x") else f"0x{payload.signed_hex}"
+
+       
+        tx_hash = w3.eth.send_raw_transaction(signed_tx)
+
+        return {
+            "success": True,
+            "signature": tx_hash.hex(),
+            "status": "Relayed to Ethereum Network"
+        }
+
+    except ValueError as ve:
+        print(f"Validation Error: {str(ve)}")
+        return {
+            "success": False,
+            "signature": tx_hash.hex(),
+            "status": "Validation Error"
+        }
+    except Exception as e:
+        print(f"Relay Error: {str(e)}")
+        return {
+            "success": False,
+            "signature": tx_hash.hex(),
+            "status": "Relay error"
+        }