Fix miner wallet queries and add tests

backend/app/routers/auth.py

@@ -6,6 +6,7 @@ from sqlalchemy import select
 
 from app.database import get_db
 from app.models.user import User
+from app.models.blockchain import Wallet
 from app.schemas.user import UserCreate, UserResponse, Token, UserLogin
 from app.auth import (
     verify_password,
@@ -38,7 +39,7 @@ async def register(user_data: UserCreate, db: AsyncSession = Depends(get_db)):
         )
 
     # Generate wallet
-    wallet_address, private_key = BlockchainService.generate_wallet_address()
+    wallet_address, private_key, public_key = BlockchainService.generate_wallet_address()
 
     # Create user
     user = User(
@@ -53,6 +54,19 @@ async def register(user_data: UserCreate, db: AsyncSession = Depends(get_db)):
     )
 
     db.add(user)
+    await db.flush()
+
+    wallet = Wallet(
+        user_id=user.id,
+        address=wallet_address,
+        private_key=private_key,
+        public_key=public_key,
+        balance=user.balance,
+        label="Primary Wallet",
+        is_primary=True,
+    )
+
+    db.add(wallet)
     await db.commit()
     await db.refresh(user)
 
@@ -115,3 +129,10 @@ async def get_current_user_info(
 async def logout():
     """Logout (client should delete token)"""
     return {"message": "Successfully logged out"}
+
+
+async def get_current_user(
+    current_user: User = Depends(get_current_active_user)
+) -> User:
+    """Reusable dependency that returns the authenticated user."""
+    return current_user

backend/app/routers/miner.py

@@ -138,22 +138,37 @@ async def get_miner_stats(
     )
     wallet = wallet_result.scalar_one_or_none()
 
+    if not wallet:
+        return MinerStats(
+            blocks_mined=0,
+            roadcoins_earned=0.0,
+            current_hashrate_mhs=miner_state.hashrate_mhs if miner_state.is_mining else 0.0,
+            average_hashrate_mhs=0.0,
+            total_shares=miner_state.shares_submitted,
+            accepted_shares=miner_state.shares_accepted,
+            rejected_shares=miner_state.shares_submitted - miner_state.shares_accepted,
+            last_block_time=None,
+            mining_since=miner_state.started_at,
+        )
+
+    miner_filter = Block.miner_address == wallet.address
+
     # Count blocks mined by this user
     blocks_count_result = await db.execute(
-        select(func.count(Block.id)).filter(Block.miner == wallet.address if wallet else None)
+        select(func.count(Block.id)).filter(miner_filter)
     )
     blocks_mined = blocks_count_result.scalar() or 0
 
     # Sum rewards earned
     rewards_result = await db.execute(
-        select(func.sum(Block.reward)).filter(Block.miner == wallet.address if wallet else None)
+        select(func.sum(Block.reward)).filter(miner_filter)
     )
     roadcoins_earned = rewards_result.scalar() or 0.0
 
     # Get last block mined
     last_block_result = await db.execute(
         select(Block)
-        .filter(Block.miner == wallet.address if wallet else None)
+        .filter(miner_filter)
         .order_by(desc(Block.timestamp))
         .limit(1)
     )
@@ -197,7 +212,7 @@ async def get_recent_blocks(
     # Get recent blocks
     blocks_result = await db.execute(
         select(Block)
-        .filter(Block.miner == wallet.address)
+        .filter(Block.miner_address == wallet.address)
         .order_by(desc(Block.timestamp))
         .limit(limit)
     )