diff --git a/apps/blockchain-node/fix_tx_metadata2.py b/apps/blockchain-node/fix_tx_metadata2.py
new file mode 100644
index 00000000..c94cddcb
--- /dev/null
+++ b/apps/blockchain-node/fix_tx_metadata2.py
@@ -0,0 +1,50 @@
+import sqlite3
+
+def fix_db():
+    print("Fixing transaction table on aitbc node...")
+    
+    conn = sqlite3.connect('/opt/aitbc/data/ait-mainnet/chain.db')
+    cursor = conn.cursor()
+    
+    try:
+        cursor.execute('ALTER TABLE "transaction" ADD COLUMN nonce INTEGER DEFAULT 0;')
+        print("Added nonce column")
+    except sqlite3.OperationalError as e:
+        print(f"Error adding nonce: {e}")
+        
+    try:
+        cursor.execute('ALTER TABLE "transaction" ADD COLUMN value INTEGER DEFAULT 0;')
+        print("Added value column")
+    except sqlite3.OperationalError as e:
+        print(f"Error adding value: {e}")
+        
+    try:
+        cursor.execute('ALTER TABLE "transaction" ADD COLUMN fee INTEGER DEFAULT 0;')
+        print("Added fee column")
+    except sqlite3.OperationalError as e:
+        print(f"Error adding fee: {e}")
+        
+    try:
+        cursor.execute('ALTER TABLE "transaction" ADD COLUMN status TEXT DEFAULT "pending";')
+        print("Added status column")
+    except sqlite3.OperationalError as e:
+        print(f"Error adding status: {e}")
+        
+    try:
+        cursor.execute('ALTER TABLE "transaction" ADD COLUMN tx_metadata TEXT;')
+        print("Added tx_metadata column")
+    except sqlite3.OperationalError as e:
+        print(f"Error adding tx_metadata: {e}")
+        
+    try:
+        cursor.execute('ALTER TABLE "transaction" ADD COLUMN timestamp TEXT;')
+        print("Added timestamp column")
+    except sqlite3.OperationalError as e:
+        print(f"Error adding timestamp: {e}")
+        
+    conn.commit()
+    conn.close()
+    print("Done fixing transaction table.")
+
+if __name__ == '__main__':
+    fix_db()
diff --git a/apps/blockchain-node/src/aitbc_chain/gossip/broker.py b/apps/blockchain-node/src/aitbc_chain/gossip/broker.py
index 45977dd5..36f982d6 100755
--- a/apps/blockchain-node/src/aitbc_chain/gossip/broker.py
+++ b/apps/blockchain-node/src/aitbc_chain/gossip/broker.py
@@ -4,7 +4,7 @@ import asyncio
 import json
 import warnings
 from collections import defaultdict
-from contextlib import suppress
+from contextlib import suppress, asynccontextmanager
 from dataclasses import dataclass
 from typing import Any, Callable, Dict, List, Optional, Set
 
@@ -225,25 +225,15 @@ class GossipBroker:
 
 
 class _InProcessSubscriber:
-    def __init__(self, queue: "asyncio.Queue[Any]", release: Callable[[], None]):
+    def __init__(self, queue: "asyncio.Queue[Any]"):
         self._queue = queue
-        self._release = release
-
-    async def __aenter__(self):
-        return self
-
-    async def __aexit__(self, exc_type, exc, tb):
-        self._release()
 
     def __aiter__(self):  # type: ignore[override]
         return self._iterator()
 
     async def _iterator(self):
-        try:
-            while True:
-                yield await self._queue.get()
-        finally:
-            self._release()
+        while True:
+            yield await self._queue.get()
 
 
 class _InProcessBroadcast:
@@ -262,23 +252,19 @@ class _InProcessBroadcast:
             self._topics.clear()
         self._running = False
 
-    async def subscribe(self, topic: str) -> _InProcessSubscriber:
+    @asynccontextmanager
+    async def subscribe(self, topic: str):
         queue: "asyncio.Queue[Any]" = asyncio.Queue()
         async with self._lock:
             self._topics[topic].append(queue)
-
-        def release() -> None:
-            async def _remove() -> None:
-                async with self._lock:
-                    queues = self._topics.get(topic)
-                    if queues and queue in queues:
-                        queues.remove(queue)
-                        if not queues:
-                            self._topics.pop(topic, None)
-
-            asyncio.create_task(_remove())
-
-        return _InProcessSubscriber(queue, release)
+            
+        try:
+            yield _InProcessSubscriber(queue)
+        finally:
+            async with self._lock:
+                queues = self._topics.get(topic)
+                if queues and queue in queues:
+                    queues.remove(queue)
 
     async def publish(self, topic: str, message: Any) -> None:
         if not self._running:
diff --git a/apps/blockchain-node/src/aitbc_chain/gossip/broker.py.orig b/apps/blockchain-node/src/aitbc_chain/gossip/broker.py.orig
new file mode 100755
index 00000000..f7ae9adb
--- /dev/null
+++ b/apps/blockchain-node/src/aitbc_chain/gossip/broker.py.orig
@@ -0,0 +1,307 @@
+from __future__ import annotations
+
+import asyncio
+import json
+import warnings
+from collections import defaultdict
+from contextlib import suppress
+from dataclasses import dataclass
+from typing import Any, Callable, Dict, List, Optional, Set
+
+warnings.filterwarnings("ignore", message="coroutine.* was never awaited", category=RuntimeWarning)
+
+try:
+    from broadcaster import Broadcast
+except ImportError:  # pragma: no cover
+    Broadcast = None  # type: ignore[assignment]
+
+from ..metrics import metrics_registry
+
+
+def _increment_publication(metric_prefix: str, topic: str) -> None:
+    metrics_registry.increment(f"{metric_prefix}_total")
+    metrics_registry.increment(f"{metric_prefix}_topic_{topic}")
+
+
+def _set_queue_gauge(topic: str, size: int) -> None:
+    metrics_registry.set_gauge(f"gossip_queue_size_{topic}", float(size))
+
+
+def _update_subscriber_metrics(topics: Dict[str, List["asyncio.Queue[Any]"]]) -> None:
+    for topic, queues in topics.items():
+        metrics_registry.set_gauge(f"gossip_subscribers_topic_{topic}", float(len(queues)))
+    total = sum(len(queues) for queues in topics.values())
+    metrics_registry.set_gauge("gossip_subscribers_total", float(total))
+
+
+def _clear_topic_metrics(topic: str) -> None:
+    metrics_registry.set_gauge(f"gossip_subscribers_topic_{topic}", 0.0)
+    _set_queue_gauge(topic, 0)
+
+@dataclass
+class TopicSubscription:
+    topic: str
+    queue: "asyncio.Queue[Any]"
+    _unsubscribe: Callable[[], None]
+
+    def close(self) -> None:
+        self._unsubscribe()
+
+    async def get(self) -> Any:
+        return await self.queue.get()
+
+    async def __aiter__(self):  # type: ignore[override]
+        try:
+            while True:
+                yield await self.queue.get()
+        finally:
+            self.close()
+
+
+class GossipBackend:
+    async def start(self) -> None:  # pragma: no cover - overridden as needed
+        return None
+
+    async def publish(self, topic: str, message: Any) -> None:
+        raise NotImplementedError
+
+    async def subscribe(self, topic: str, max_queue_size: int = 100) -> TopicSubscription:
+        raise NotImplementedError
+
+    async def shutdown(self) -> None:
+        return None
+
+
+class InMemoryGossipBackend(GossipBackend):
+    def __init__(self) -> None:
+        self._topics: Dict[str, List["asyncio.Queue[Any]"]] = defaultdict(list)
+        self._lock = asyncio.Lock()
+
+    async def publish(self, topic: str, message: Any) -> None:
+        async with self._lock:
+            queues = list(self._topics.get(topic, []))
+        for queue in queues:
+            await queue.put(message)
+            _set_queue_gauge(topic, queue.qsize())
+        _increment_publication("gossip_publications", topic)
+
+    async def subscribe(self, topic: str, max_queue_size: int = 100) -> TopicSubscription:
+        queue: "asyncio.Queue[Any]" = asyncio.Queue(maxsize=max_queue_size)
+
+        async with self._lock:
+            self._topics[topic].append(queue)
+            _update_subscriber_metrics(self._topics)
+
+        _set_queue_gauge(topic, queue.qsize())
+
+        def _unsubscribe() -> None:
+            async def _remove() -> None:
+                async with self._lock:
+                    queues = self._topics.get(topic)
+                    if queues is None:
+                        return
+                    if queue in queues:
+                        queues.remove(queue)
+                        if not queues:
+                            self._topics.pop(topic, None)
+                            _clear_topic_metrics(topic)
+                        _update_subscriber_metrics(self._topics)
+
+            asyncio.create_task(_remove())
+
+        return TopicSubscription(topic=topic, queue=queue, _unsubscribe=_unsubscribe)
+
+    async def shutdown(self) -> None:
+        async with self._lock:
+            topics = list(self._topics.keys())
+            self._topics.clear()
+        for topic in topics:
+            _clear_topic_metrics(topic)
+        _update_subscriber_metrics(self._topics)
+
+
+class BroadcastGossipBackend(GossipBackend):
+    def __init__(self, url: str) -> None:
+        if Broadcast is None:  # provide in-process fallback when Broadcast is missing
+            self._broadcast = _InProcessBroadcast()
+        else:
+            self._broadcast = Broadcast(url)  # type: ignore[arg-type]
+        self._tasks: Set[asyncio.Task[None]] = set()
+        self._lock = asyncio.Lock()
+        self._running = False
+
+    async def start(self) -> None:
+        if not self._running:
+            await self._broadcast.connect()  # type: ignore[union-attr]
+            self._running = True
+
+    async def publish(self, topic: str, message: Any) -> None:
+        if not self._running:
+            raise RuntimeError("Broadcast backend not started")
+        payload = _encode_message(message)
+        await self._broadcast.publish(topic, payload)  # type: ignore[union-attr]
+        _increment_publication("gossip_broadcast_publications", topic)
+
+    async def subscribe(self, topic: str, max_queue_size: int = 100) -> TopicSubscription:
+        if not self._running:
+            raise RuntimeError("Broadcast backend not started")
+
+        queue: "asyncio.Queue[Any]" = asyncio.Queue(maxsize=max_queue_size)
+        stop_event = asyncio.Event()
+
+        async def _run_subscription() -> None:
+            async with self._broadcast.subscribe(topic) as subscriber:  # type: ignore[attr-defined,union-attr]
+                async for event in subscriber:  # type: ignore[union-attr]
+                    if stop_event.is_set():
+                        break
+                    data = _decode_message(getattr(event, "message", event))
+                    try:
+                        await queue.put(data)
+                        _set_queue_gauge(topic, queue.qsize())
+                    except asyncio.CancelledError:
+                        break
+
+        task = asyncio.create_task(_run_subscription(), name=f"broadcast-sub:{topic}")
+        async with self._lock:
+            self._tasks.add(task)
+            metrics_registry.set_gauge("gossip_broadcast_subscribers_total", float(len(self._tasks)))
+
+        def _unsubscribe() -> None:
+            async def _stop() -> None:
+                stop_event.set()
+                task.cancel()
+                with suppress(asyncio.CancelledError):
+                    await task
+                async with self._lock:
+                    self._tasks.discard(task)
+                    metrics_registry.set_gauge("gossip_broadcast_subscribers_total", float(len(self._tasks)))
+
+            asyncio.create_task(_stop())
+
+        return TopicSubscription(topic=topic, queue=queue, _unsubscribe=_unsubscribe)
+
+    async def shutdown(self) -> None:
+        async with self._lock:
+            tasks = list(self._tasks)
+            self._tasks.clear()
+            metrics_registry.set_gauge("gossip_broadcast_subscribers_total", 0.0)
+        for task in tasks:
+            task.cancel()
+            with suppress(asyncio.CancelledError):
+                await task
+        if self._running:
+            await self._broadcast.disconnect()  # type: ignore[union-attr]
+            self._running = False
+
+
+class GossipBroker:
+    def __init__(self, backend: GossipBackend) -> None:
+        self._backend = backend
+        self._lock = asyncio.Lock()
+        self._started = False
+
+    async def publish(self, topic: str, message: Any) -> None:
+        if not self._started:
+            await self._backend.start()
+            self._started = True
+        await self._backend.publish(topic, message)
+
+    async def subscribe(self, topic: str, max_queue_size: int = 100) -> TopicSubscription:
+        if not self._started:
+            await self._backend.start()
+            self._started = True
+        return await self._backend.subscribe(topic, max_queue_size=max_queue_size)
+
+    async def set_backend(self, backend: GossipBackend) -> None:
+        await backend.start()
+        async with self._lock:
+            previous = self._backend
+            self._backend = backend
+            self._started = True
+        await previous.shutdown()
+
+    async def shutdown(self) -> None:
+        await self._backend.shutdown()
+
+
+class _InProcessSubscriber:
+    def __init__(self, queue: "asyncio.Queue[Any]"):
+        self._queue = queue
+
+    def __aiter__(self):  # type: ignore[override]
+        return self._iterator()
+
+    async def _iterator(self):
+        while True:
+            yield await self._queue.get()
+
+
+class _InProcessBroadcast:
+    """Minimal in-memory broadcast substitute for tests when Starlette Broadcast is absent."""
+
+    def __init__(self) -> None:
+        self._topics: Dict[str, List["asyncio.Queue[Any]"]] = defaultdict(list)
+        self._lock = asyncio.Lock()
+        self._running = False
+
+    async def connect(self) -> None:
+        self._running = True
+
+    async def disconnect(self) -> None:
+        async with self._lock:
+            self._topics.clear()
+        self._running = False
+
+    @asynccontextmanager
+    async def subscribe(self, topic: str):
+        queue: "asyncio.Queue[Any]" = asyncio.Queue()
+        async with self._lock:
+            self._topics[topic].append(queue)
+            
+        try:
+            yield _InProcessSubscriber(queue)
+        finally:
+            async with self._lock:
+                queues = self._topics.get(topic)
+                if queues and queue in queues:
+                    queues.remove(queue)
+
+    async def publish(self, topic: str, message: Any) -> None:
+        if not self._running:
+            raise RuntimeError("Broadcast backend not started")
+        async with self._lock:
+            queues = list(self._topics.get(topic, []))
+        for queue in queues:
+            await queue.put(message)
+
+
+def create_backend(backend_type: str, *, broadcast_url: Optional[str] = None) -> GossipBackend:
+    backend = backend_type.lower()
+    if backend in {"memory", "inmemory", "local"}:
+        return InMemoryGossipBackend()
+    if backend in {"broadcast", "starlette", "redis"}:
+        if not broadcast_url:
+            raise ValueError("Broadcast backend requires a gossip_broadcast_url setting")
+        return BroadcastGossipBackend(broadcast_url)
+    raise ValueError(f"Unsupported gossip backend '{backend_type}'")
+
+
+def _encode_message(message: Any) -> Any:
+    if isinstance(message, (str, bytes, bytearray)):
+        return message
+    return json.dumps(message, separators=(",", ":"))
+
+
+def _decode_message(message: Any) -> Any:
+    if isinstance(message, (bytes, bytearray)):
+        message = message.decode("utf-8")
+    if isinstance(message, str):
+        try:
+            return json.loads(message)
+        except json.JSONDecodeError:
+            return message
+    return message
+
+
+gossip_broker = GossipBroker(InMemoryGossipBackend())
+
diff --git a/cli/aitbc_cli/dual_mode_wallet_adapter.py b/cli/aitbc_cli/dual_mode_wallet_adapter.py
index 65ce5c72..e197a28c 100755
--- a/cli/aitbc_cli/dual_mode_wallet_adapter.py
+++ b/cli/aitbc_cli/dual_mode_wallet_adapter.py
@@ -290,8 +290,11 @@ class DualModeWalletAdapter:
     
     def _send_transaction_file(self, wallet_name: str, password: str, to_address: str, 
                              amount: float, description: Optional[str]) -> Dict[str, Any]:
-        """Send transaction using file-based storage"""
+        """Send transaction using file-based storage and blockchain RPC"""
         from .commands.wallet import _load_wallet, _save_wallet
+        import httpx
+        from .utils import error, success
+        from datetime import datetime
         
         wallet_path = self.wallet_dir / f"{wallet_name}.json"
         
@@ -300,36 +303,79 @@ class DualModeWalletAdapter:
             raise Exception("Wallet not found")
         
         wallet_data = _load_wallet(wallet_path, wallet_name)
-        balance = wallet_data.get("balance", 0)
-        
-        if balance < amount:
-            error(f"Insufficient balance. Available: {balance}, Required: {amount}")
+        # Fetch current balance and nonce from blockchain
+        from_address = wallet_data.get("address")
+        if not from_address:
+            error("Wallet does not have an address configured")
+            raise Exception("Invalid wallet")
+            
+        rpc_url = self.config.blockchain_rpc_url
+        try:
+            resp = httpx.get(f"{rpc_url}/rpc/getBalance/{from_address}?chain_id=ait-mainnet", timeout=5)
+            if resp.status_code == 200:
+                data = resp.json()
+                chain_balance = data.get("balance", 0)
+                nonce = data.get("nonce", 0)
+            else:
+                error(f"Failed to get balance from chain: {resp.text}")
+                raise Exception("Chain error")
+        except Exception as e:
+            error(f"Failed to connect to blockchain RPC: {e}")
+            raise
+
+        if chain_balance < amount:
+            error(f"Insufficient blockchain balance. Available: {chain_balance}, Required: {amount}")
             raise Exception("Insufficient balance")
+            
+        # Construct and send transaction
+        tx_payload = {
+            "type": "TRANSFER",
+            "sender": from_address,
+            "nonce": nonce,
+            "fee": 0,
+            "payload": {"to": to_address, "value": amount},
+            "sig": "mock_signature" # Replace with real signature when implemented
+        }
         
-        # Add transaction
+        try:
+            resp = httpx.post(f"{rpc_url}/rpc/sendTx", json=tx_payload, timeout=5)
+            if resp.status_code not in (200, 201):
+                error(f"Failed to submit transaction to chain: {resp.text}")
+                raise Exception("Chain submission failed")
+            tx_hash = resp.json().get("tx_hash")
+        except Exception as e:
+            error(f"Failed to send transaction to RPC: {e}")
+            raise
+
+        # Add transaction to local history
         transaction = {
             "type": "send",
             "amount": -amount,
             "to_address": to_address,
             "description": description or "",
             "timestamp": datetime.now().isoformat(),
+            "tx_hash": tx_hash,
+            "status": "pending"
         }
         
+        if "transactions" not in wallet_data:
+            wallet_data["transactions"] = []
+            
         wallet_data["transactions"].append(transaction)
-        wallet_data["balance"] = balance - amount
+        wallet_data["balance"] = chain_balance - amount
         
         # Save wallet
         save_password = password if wallet_data.get("encrypted") else None
         _save_wallet(wallet_path, wallet_data, save_password)
         
-        success(f"Sent {amount} AITBC to {to_address}")
+        success(f"Submitted transaction {tx_hash} to send {amount} AITBC to {to_address}")
         return {
             "mode": "file",
             "wallet_name": wallet_name,
             "to_address": to_address,
             "amount": amount,
             "description": description,
-            "new_balance": wallet_data["balance"],
+            "tx_hash": tx_hash,
             "timestamp": transaction["timestamp"]
         }
     
diff --git a/cli/aitbc_cli/utils/subprocess.py b/cli/aitbc_cli/utils/subprocess.py
index 9f2e721d..7fb498a5 100644
--- a/cli/aitbc_cli/utils/subprocess.py
+++ b/cli/aitbc_cli/utils/subprocess.py
@@ -1,29 +1,29 @@
 import subprocess
 import sys
-from typing import List, Optional, Union
+from typing import List, Optional, Union, Any
 from . import error, output
 
-def run_subprocess(cmd: List[str], check: bool = True, capture_output: bool = True, shell: bool = False) -> Optional[str]:
+def run_subprocess(cmd: List[str], check: bool = True, capture_output: bool = True, shell: bool = False, **kwargs: Any) -> Optional[Union[str, subprocess.CompletedProcess]]:
     """Run a subprocess command safely with logging"""
     try:
         if shell:
             # When shell=True, cmd should be a string
             cmd_str = " ".join(cmd) if isinstance(cmd, list) else cmd
-            result = subprocess.run(cmd_str, shell=True, check=check, capture_output=capture_output, text=True)
+            result = subprocess.run(cmd_str, shell=True, check=check, capture_output=capture_output, text=True, **kwargs)
         else:
-            result = subprocess.run(cmd, check=check, capture_output=capture_output, text=True)
+            result = subprocess.run(cmd, check=check, capture_output=capture_output, text=True, **kwargs)
             
         if capture_output:
             return result.stdout.strip()
-        return None
+        return result
         
     except subprocess.CalledProcessError as e:
         error(f"Command failed with exit code {e.returncode}")
-        if capture_output and e.stderr:
+        if capture_output and getattr(e, 'stderr', None):
             print(e.stderr, file=sys.stderr)
         if check:
             sys.exit(e.returncode)
-        return None
+        return getattr(e, 'stdout', None) if capture_output else None
     except Exception as e:
         error(f"Failed to execute command: {e}")
         if check:
diff --git a/fix_gossip.patch b/fix_gossip.patch
new file mode 100644
index 00000000..c5f453a4
--- /dev/null
+++ b/fix_gossip.patch
@@ -0,0 +1,9 @@
+--- /opt/aitbc/apps/blockchain-node/src/aitbc_chain/gossip/broker.py	2026-03-23 12:40:00.000000000 +0100
++++ /opt/aitbc/apps/blockchain-node/src/aitbc_chain/gossip/broker.py.new	2026-03-23 12:40:00.000000000 +0100
+@@ -6,7 +6,7 @@
+ import warnings
+ from collections import defaultdict
+-from contextlib import suppress
++from contextlib import suppress, asynccontextmanager
+ from dataclasses import dataclass
+ from typing import Any, Callable, Dict, List, Optional, Set
diff --git a/fix_inprocess.py b/fix_inprocess.py
new file mode 100644
index 00000000..73ec5e05
--- /dev/null
+++ b/fix_inprocess.py
@@ -0,0 +1,30 @@
+import asyncio
+from contextlib import asynccontextmanager
+from typing import Any
+
+class _InProcessSubscriber:
+    def __init__(self, queue, release):
+        self._queue = queue
+        self._release = release
+    def __aiter__(self):
+        return self._iterator()
+    async def _iterator(self):
+        try:
+            while True:
+                yield await self._queue.get()
+        finally:
+            pass
+
+@asynccontextmanager
+async def subscribe():
+    queue = asyncio.Queue()
+    try:
+        yield _InProcessSubscriber(queue, lambda: None)
+    finally:
+        pass
+
+async def main():
+    async with subscribe() as sub:
+        print("Success")
+
+asyncio.run(main())
diff --git a/test_send.sh b/test_send.sh
new file mode 100755
index 00000000..709aef9e
--- /dev/null
+++ b/test_send.sh
@@ -0,0 +1,2 @@
+export AITBC_WALLET="test_wallet"
+aitbc wallet send aitbc1my-test-wallet_hd 50
diff --git a/test_wallet.py b/test_wallet.py
new file mode 100644
index 00000000..666f9e0d
--- /dev/null
+++ b/test_wallet.py
@@ -0,0 +1,22 @@
+import json
+
+wallet_data = {
+    "name": "test_wallet",
+    "type": "hd",
+    "address": "aitbc1genesis",
+    "private_key": "dummy",
+    "public_key": "dummy",
+    "encrypted": False,
+    "transactions": [],
+    "balance": 1000000
+}
+
+import os
+import pathlib
+
+wallet_dir = pathlib.Path("/root/.aitbc/wallets")
+wallet_dir.mkdir(parents=True, exist_ok=True)
+wallet_path = wallet_dir / "test_wallet.json"
+
+with open(wallet_path, "w") as f:
+    json.dump(wallet_data, f)