diff --git a/src/xian/services/bds/bds.py b/src/xian/services/bds/bds.py
index cca1af4..52b98d7 100644
--- a/src/xian/services/bds/bds.py
+++ b/src/xian/services/bds/bds.py
@@ -1,5 +1,6 @@
 import json
 
+from copy import deepcopy
 from loguru import logger
 from datetime import datetime
 from xian.services.bds import sql
@@ -9,28 +10,60 @@
 from xian.services.bds.database import DB, result_to_json
 from xian_py.wallet import key_is_valid
 from timeit import default_timer as timer
+from decimal import Decimal
 
 
 # Custom JSON encoder for our own objects
+def strip_trailing_zeros(s: str) -> str:
+    if '.' in s:
+        s = s.rstrip('0').rstrip('.')
+    return s
+
+
+def set_nested_dict_value(d, keys, value):
+    """Set a value in a nested dictionary using a list of keys."""
+    for key in keys[:-1]:
+        d = d.setdefault(key, {})
+    if keys:
+        d[keys[-1]] = value
+    else:
+        # No keys, set value at the current level
+        d.update(value)
+
+
+def merge_dicts(a, b):
+    """Recursively merge dictionary b into dictionary a."""
+    for key in b:
+        if key in a and isinstance(a[key], dict) and isinstance(b[key], dict):
+            merge_dicts(a[key], b[key])
+        else:
+            a[key] = b[key]
+
+
+# Encodes everything to string - except for unknown objects
 class CustomEncoder(json.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, ContractingDecimal):
-            v = float(str(obj))
-            return int(v) if v.is_integer() else v
-        if isinstance(obj, Datetime):
-            # Convert to ISO 8601 format string with microseconds
+            return strip_trailing_zeros(str(obj))
+        elif isinstance(obj, Decimal):
+            return strip_trailing_zeros(str(obj))
+        elif isinstance(obj, Datetime):
             return obj._datetime.isoformat(timespec='microseconds')
-        if isinstance(obj, Timedelta):
-            # Convert to total seconds with microseconds
-            return obj._timedelta.total_seconds()
-        return super().default(obj)
-
+        elif isinstance(obj, Timedelta):
+            total_seconds = str(obj._timedelta.total_seconds())
+            return strip_trailing_zeros(total_seconds)
+        elif isinstance(obj, int):
+            return str(obj)
+        else:
+            return super().default(obj)
+
+    # To recursively process and handle custom types within nested structures
     def encode(self, obj):
         def process(o):
             if isinstance(o, dict):
                 if len(o) == 1:
                     if '__fixed__' in o:
-                        return float(o['__fixed__'])
+                        return strip_trailing_zeros(str(o['__fixed__']))
                     elif '__time__' in o:
                         # Convert __time__ list to ISO 8601 string
                         time_list = o['__time__']
@@ -39,18 +72,28 @@ def process(o):
                         dt_obj = datetime(*time_list)
                         # Convert to ISO 8601 string with microseconds
                         return dt_obj.isoformat(timespec='microseconds')
-                    else:
-                        return {k: process(v) for k, v in o.items()}
-                else:
-                    return {k: process(v) for k, v in o.items()}
+                # Process nested dictionaries and convert keys to strings
+                return {str(k): process(v) for k, v in o.items()}
             elif isinstance(o, list):
+                # Process each item in the list
                 return [process(v) for v in o]
+            elif isinstance(o, ContractingDecimal):
+                return strip_trailing_zeros(str(o))
+            elif isinstance(o, Decimal):
+                return strip_trailing_zeros(str(o))
             elif isinstance(o, Datetime):
+                # Serialize datetime as ISO formatted string
                 return o._datetime.isoformat(timespec='microseconds')
             elif isinstance(o, Timedelta):
-                return o._timedelta.total_seconds()
+                # Serialize total seconds as a string
+                total_seconds = str(o._timedelta.total_seconds())
+                return strip_trailing_zeros(total_seconds)
+            elif isinstance(o, int):
+                return str(o)
             else:
+                # Return the object as-is if it doesn't match any custom types
                 return o
+        # Encode the processed object
         return super().encode(process(obj))
 
 
@@ -72,13 +115,14 @@ async def init(self, cometbft_genesis: dict):
 
     async def process_genesis_block(self, cometbft_genesis: dict):
         start_time = timer()
+
         genesis_state = cometbft_genesis["abci_genesis"]["genesis"]
 
         # insert genesis txn
         await self.insert_genesis_txn(genesis_state)
 
         # process each item in the genesis block
-        for index, state in enumerate(genesis_state):         
+        for index, state in enumerate(genesis_state):
             logger.debug(f"processing item {index} from genesis_state")
             parts = state["key"].split(".")
 
@@ -89,7 +133,7 @@ async def process_genesis_block(self, cometbft_genesis: dict):
                 await self.insert_genesis_state_change(state["key"], state["value"])
                 await self.insert_genesis_state(state["key"], state["value"])
 
-        logger.debug(f'Processed genesis block in {timer() - start_time:.3f} seconds')
+        logger.debug(f'Saved genesis block to BDS in {timer() - start_time:.3f} seconds')
 
     async def __init_tables(self):
         try:
@@ -105,42 +149,20 @@ async def __init_tables(self):
             logger.exception(e)
 
 
-    async def insert_full_data(self, tx: dict, block_time: datetime):
-        total_time = timer()
-
-        # Tx
-        start_time = timer()
+    async def add_to_batch(self, tx: dict, block_time: datetime):
         await self._insert_tx(tx, block_time)
-        logger.debug(f'Saved tx in {timer() - start_time:.3f} seconds')
-
-        # State
-        start_time = timer()
         await self._insert_state(tx, block_time)
-        logger.debug(f'Saved contracts in {timer() - start_time:.3f} seconds')
-
-        # State changes
-        start_time = timer()
         await self._insert_state_changes(tx, block_time)
-        logger.debug(f'Saved state changes in {timer() - start_time:.3f} seconds')
-
-        # Rewards
-        start_time = timer()
         await self._insert_rewards(tx, block_time)
-        logger.debug(f'Saved rewards in {timer() - start_time:.3f} seconds')
-
-        # Addresses
-        start_time = timer()
         await self._insert_addresses(tx, block_time)
-        logger.debug(f'Saved addresses in {timer() - start_time:.3f} seconds')
+        await self._insert_contracts(tx, block_time)
 
-        # Contracts
-        # Only save contracts if tx was successful
-        if tx["tx_result"]["status"] == 0:
-            start_time = timer()
-            await self._insert_contracts(tx, block_time)
-            logger.debug(f'Saved contracts in {timer() - start_time:.3f} seconds')
+    async def commit_batch(self):
+        if len(self.db.batch) == 0: return
 
-        logger.debug(f'Processed tx {tx["tx_result"]["hash"]} in {timer() - total_time:.3f} seconds')
+        start_time = timer()
+        await self.db.commit_batch_to_disk()
+        logger.debug(f'Saved block to BDS in {timer() - start_time:.3f} seconds')
 
     async def _insert_tx(self, tx: dict, block_time: datetime):
         status = True if tx['tx_result']['status'] == 0 else False
@@ -180,16 +202,59 @@ async def _insert_state_changes(self, tx: dict, block_time: datetime):
                 logger.exception(e)
 
     async def _insert_state(self, tx: dict, block_time: datetime):
+        # Collect state changes by contract
+        contract_states = {}
+
         for state_change in tx['tx_result']['state']:
+            key = state_change['key']
+            value = state_change['value']
+
+            # Parse the key to get contract name and variable path
+            parts = key.split('.', 1)
+            if len(parts) == 2:
+                contract_name, rest_of_key = parts
+            else:
+                # Handle keys without a dot (unlikely but possible)
+                contract_name = parts[0]
+                rest_of_key = ''
+
+            key_path = rest_of_key.split(':') if rest_of_key else []
+
+            # Initialize the contract state dictionary
+            contract_state = contract_states.setdefault(contract_name, {})
+
+            # Set the nested value in the contract's state dictionary
+            set_nested_dict_value(contract_state, key_path, value)
+
+        # For each contract, merge state and update the 'state' table
+        for contract_name, state_dict in contract_states.items():
             try:
+                # Fetch existing state from the database
+                existing_state_row = await self.db.fetch_one(sql.select_state_by_key(), [contract_name])
+                if existing_state_row and existing_state_row['value'] not in [None, 'null']:
+                    existing_state_json = existing_state_row['value']
+                    # Ensure existing_state is a dictionary
+                    if isinstance(existing_state_json, str):
+                        existing_state = json.loads(existing_state_json)
+                    else:
+                        existing_state = existing_state_json
+                else:
+                    existing_state = {}
+
+                # Deep copy to avoid mutating the original
+                merged_state = deepcopy(existing_state)
+
+                # Merge the new state changes into the existing state
+                merge_dicts(merged_state, state_dict)
+
+                # Update the 'state' table with the merged state
                 self.db.add_query_to_batch(sql.insert_or_update_state(), [
-                    state_change['key'],
-                    json.dumps(state_change['value'], cls=CustomEncoder),
+                    contract_name,
+                    json.dumps(merged_state, cls=CustomEncoder),
                     block_time
                 ])
-
             except Exception as e:
-                logger.exception(e)
+                logger.exception(f"Error updating state for contract '{contract_name}': {e}")
 
     async def _insert_rewards(self, tx: dict, block_time: datetime):
         async def insert(type, key, value):
@@ -198,7 +263,7 @@ async def insert(type, key, value):
                 tx['tx_result']['hash'],
                 type,
                 key,
-                json.dumps(value, cls=CustomEncoder),
+                strip_trailing_zeros(str(value)),
                 block_time
             ])
 
@@ -208,21 +273,21 @@ async def insert(type, key, value):
             # Developer reward
             for address, reward in rewards['developer_reward'].items():
                 try:
-                    await insert('developer', address, float(reward))
+                    await insert('developer', address, reward)
                 except Exception as e:
                     logger.exception(e)
 
             # Masternode reward
             for address, reward in rewards['masternode_reward'].items():
                 try:
-                    await insert('masternode', address, float(reward))
+                    await insert('masternode', address, reward)
                 except Exception as e:
                     logger.exception(e)
 
             # Foundation reward
             for address, reward in rewards['foundation_reward'].items():
                 try:
-                    await insert('foundation', address, float(reward))
+                    await insert('foundation', address, reward)
                 except Exception as e:
                     logger.exception(e)
 
@@ -241,6 +306,9 @@ async def _insert_addresses(self, tx: dict, block_time: datetime):
                         logger.exception(e)
 
     async def _insert_contracts(self, tx: dict, block_time: datetime):
+        # Only save contracts if tx was successful
+        if tx["tx_result"]["status"] != 0: return
+
         if tx['payload']['contract'] == 'submission' and tx['payload']['function'] == 'submit_contract':
             try:
                 self.db.add_query_to_batch(sql.insert_contracts(), [
@@ -363,7 +431,7 @@ async def insert_genesis_state_contract(self, contract_name, code, submission_ti
                 submission_time
             ])
         except Exception as e:
-            logger.exception(e)      
+            logger.exception(e)
 
     async def insert_genesis_state_change(self, key, value):
                 try:
diff --git a/src/xian/services/bds/database.py b/src/xian/services/bds/database.py
index b0efdbb..667965b 100644
--- a/src/xian/services/bds/database.py
+++ b/src/xian/services/bds/database.py
@@ -94,6 +94,10 @@ async def fetch(self, query: str, params: list = []):
                 logger.exception(f'Error while executing SQL: {e}')
                 raise e
 
+    async def fetch_one(self, query: str, params: list):
+        async with self.pool.acquire() as connection:
+            return await connection.fetchrow(query, *params)
+
     async def has_entries(self, table_name: str) -> bool:
         try:
             result = await self.fetch(f"SELECT COUNT(*) as count FROM {table_name}")
diff --git a/src/xian/services/bds/sql.py b/src/xian/services/bds/sql.py
index eb5726e..7d7e686 100644
--- a/src/xian/services/bds/sql.py
+++ b/src/xian/services/bds/sql.py
@@ -219,6 +219,12 @@ def select_state():
     """
 
 
+def select_state_by_key():
+    return """
+    SELECT value FROM state WHERE key = $1;
+    """
+
+
 def select_state_history():
     return """
     SELECT