diff --git a/nullptr/api.py b/nullptr/api.py
index 266fdb9..16fa3fa 100644
--- a/nullptr/api.py
+++ b/nullptr/api.py
@@ -95,7 +95,7 @@ class Api:
   def jumps(self, waypoint):
     data = self.request('get', f'systems/{waypoint.system()}/waypoints/{waypoint}/jump-gate')
     symbol = str(waypoint)
-    return self.store.update(Jumpgate, data)
+    return self.store.update(Jumpgate, data, symbol)
   
   def list_ships(self):
     data = self.request('get', 'my/ships')
@@ -110,6 +110,31 @@ class Api:
     if data is not None and 'contract' in data:
       contract = self.store.update('Contract', data['contract'])
       return contract
+  
+  def deliver(self, ship, typ, contract):
+    units = ship.get_cargo(typ)
+    if units == 0:
+      print("Resource not in cargo")
+      return {}
+    data = {
+      'shipSymbol': str(ship),
+      'tradeSymbol': typ.upper(),
+      'units': units
+    }
+    data = self.request('post', f'my/contracts/{contract}/deliver', data)
+    if 'cargo' in data:
+      ship.update(data)
+    if 'contract' in data:
+      contract.update(data['contract'])
+    return contract
+  
+  def fulfill(self, contract):
+    data = self.request('post', f'my/contracts/{contract}/fulfill')
+    if 'contract' in data:
+      contract.update(data['contract'])
+    if 'agent' in data:
+      self.agent.update(data['agent'])
+    return contract
  
   def navigate(self, ship, wp):
     data = {'waypointSymbol': str(wp)}
@@ -182,3 +207,27 @@ class Api:
     if 'agent' in data:
       self.agent.update(data['agent'])
     return data
+  
+  def purchase(self, typ, wp):
+    data = {
+      'shipType': typ,
+      'waypointSymbol': str(wp)
+    }
+    data = self.request('post', 'my/ships', data)
+    if 'agent' in data:
+      self.agent.update(data['agent'])
+    if 'ship' in data:
+      ship = self.store.update('Ship', data['ship'])  
+      return ship
+    
+  def jump(self, ship, system):
+    data = {
+      "systemSymbol": system.symbol
+    }
+    data = self.request('post', f'my/ships/{ship}/jump', data)
+    if 'nav' in data:
+      ship.update(data)
+    return ship
+    
+  def shipyard(self, wp):
+    return self.request('get', f'systems/{wp.system()}/waypoints/{wp}/shipyard')
diff --git a/nullptr/commander.py b/nullptr/commander.py
index e463a64..f5898bc 100644
--- a/nullptr/commander.py
+++ b/nullptr/commander.py
@@ -110,8 +110,12 @@ class Commander(CommandLine):
     waypoint = self.store.get(Waypoint, waypoint_str.upper())
     r = self.api.marketplace(waypoint)
   
-  def do_jumps(self, waypoint_str):
-    waypoint = self.store.get(Waypoint, waypoint_str.upper())
+  def do_jumps(self, waypoint_str=None):
+    if waypoint_str is None:
+      if not self.has_ship(): return
+      waypoint = self.ship.location()
+    else:
+      waypoint = self.store.get(Waypoint, waypoint_str.upper())
     r = self.api.jumps(waypoint)
     pprint(r)
   
@@ -225,4 +229,23 @@ class Commander(CommandLine):
     if not self.has_ship(): return
     self.api.jettison(self.ship, resource.upper())
     self.do_cargo()
+  
+  def do_shipyard(self):
+    if not self.has_ship(): return
+    location = self.ship.location()
+    pprint(self.api.shipyard(location))
+  
+  def do_jump(self, system_str):
+    if not self.has_ship(): return
+    system = self.resolve('System', system_str)
+    self.api.jump(self.ship, system)
+    pprint(self.ship)
     
+  def do_purchase(self, ship_type):
+    if not self.has_ship(): return
+    location = self.ship.location()
+    ship_type = ship_type.upper()
+    if not ship_type.startswith('SHIP'):
+      ship_type = 'SHIP_' + ship_type
+    s = self.api.purchase(ship_type, location)
+    pprint(s)
diff --git a/nullptr/models/contract.py b/nullptr/models/contract.py
index 419648c..1713340 100644
--- a/nullptr/models/contract.py
+++ b/nullptr/models/contract.py
@@ -25,7 +25,7 @@ class Contract(Base):
   
   def api_dict(self):
     return {
-      'id': self.symbol,
+      'id': self.symbol.lower(),
       'expiration': self.expires_str,
     }
   
diff --git a/nullptr/models/jumpgate.py b/nullptr/models/jumpgate.py
index d2ee8f9..29a8070 100644
--- a/nullptr/models/jumpgate.py
+++ b/nullptr/models/jumpgate.py
@@ -4,7 +4,7 @@ from dataclasses import field
 class Jumpgate(SystemMember):
   range: int
   faction: str
-  systems: list = field(default_factory=list)
+  systems: list = []
   
   def update(self, d):
     self.setlst('systems', d, 'connectedSystems', 'symbol')
@@ -18,3 +18,9 @@ class Jumpgate(SystemMember):
   def path(self):
     sector, system, _ = self.symbol.split('-')
     return f'atlas/{sector}/{system[0:1]}/{system}/{self.symbol}.{self.ext()}'
+  
+  def f(self, detail=1):
+    r = self.symbol
+    if detail > 1:
+      r += '\n'.join(self.systems)
+    return r
diff --git a/nullptr/models/marketplace.py b/nullptr/models/marketplace.py
index 9229c3f..e8cbfe6 100644
--- a/nullptr/models/marketplace.py
+++ b/nullptr/models/marketplace.py
@@ -5,10 +5,10 @@ from nullptr.util import *
 from dataclasses import field
 
 class Marketplace(SystemMember):
-  imports:list = field(default_factory=list)
-  exports:list = field(default_factory=list)
-  exchange:list = field(default_factory=list)
-  prices:dict = field(default_factory=dict)
+  imports:list = []
+  exports:list = []
+  exchange:list = []
+  prices:dict = {}
   last_prices:int = 0
   
   def update(self, d):
diff --git a/nullptr/models/ship.py b/nullptr/models/ship.py
index 3cfcb0c..70d648c 100644
--- a/nullptr/models/ship.py
+++ b/nullptr/models/ship.py
@@ -5,7 +5,7 @@ from dataclasses import dataclass, field
 
 class Ship(Base):  
   cargo:dict = {}
-  mission_state:dict = field(default_factory=dict)
+  mission_state:dict = {}
   status:str = ''
   cargo_capacity:int = 0
   cargo_units:int = 0
diff --git a/nullptr/models/waypoint.py b/nullptr/models/waypoint.py
index c867fad..68b85f4 100644
--- a/nullptr/models/waypoint.py
+++ b/nullptr/models/waypoint.py
@@ -6,7 +6,7 @@ class Waypoint(SystemMember):
   x:int = 0
   y:int = 0
   type:str = 'unknown'
-  traits:list = field(default_factory=list)
+  traits:list = []
   faction:str = ''
   
   def update(self, d):
diff --git a/nullptr/store.py b/nullptr/store.py
index 2a2f0e2..818cc26 100644
--- a/nullptr/store.py
+++ b/nullptr/store.py
@@ -93,10 +93,11 @@ class Store:
         return None
     return self.data[typ][symbol]
   
-  def update(self, typ, data):
+  def update(self, typ, data, symbol=None):
     if type(typ) == str and typ in self.model_names:
       typ = self.model_names[typ] 
-    symbol = mg(data, typ.identifier)
+    if symbol is None:
+      symbol = mg(data, typ.identifier)
     obj = self.get(typ, symbol, True)
     obj.update(data)
     return obj