diff --git a/dagger/contracts/interactions.nim b/dagger/contracts/interactions.nim
index 2501ede2..0f732f09 100644
--- a/dagger/contracts/interactions.nim
+++ b/dagger/contracts/interactions.nim
@@ -42,3 +42,11 @@ proc new*(_: type ContractInteractions,
 
 proc new*(_: type ContractInteractions): ContractInteractions =
   ContractInteractions.new("ws://localhost:8545")
+
+proc start*(interactions: ContractInteractions) {.async.} =
+  interactions.sales.start()
+  interactions.proving.start()
+
+proc stop*(interactions: ContractInteractions) {.async.} =
+  interactions.sales.stop()
+  interactions.proving.stop()
diff --git a/dagger/node.nim b/dagger/node.nim
index d0d04f3e..c68e0510 100644
--- a/dagger/node.nim
+++ b/dagger/node.nim
@@ -51,6 +51,9 @@ proc start*(node: DaggerNodeRef) {.async.} =
   await node.erasure.start()
   await node.discovery.start()
 
+  if not node.contracts.isNil:
+    await node.contracts.start()
+
   node.networkId = node.switch.peerInfo.peerId
   notice "Started dagger node", id = $node.networkId, addrs = node.switch.peerInfo.addrs
 
@@ -62,6 +65,9 @@ proc stop*(node: DaggerNodeRef) {.async.} =
   await node.erasure.stop()
   await node.discovery.stop()
 
+  if not node.contracts.isNil:
+    await node.contracts.stop()
+
 proc findPeer*(
   node: DaggerNodeRef,
   peerId: PeerID): Future[?PeerRecord] {.async.} =
diff --git a/tests/dagger/testnode.nim b/tests/dagger/testnode.nim
index 5c458dc0..80ea311b 100644
--- a/tests/dagger/testnode.nim
+++ b/tests/dagger/testnode.nim
@@ -17,6 +17,7 @@ import pkg/dagger/node
 import pkg/dagger/manifest
 import pkg/dagger/discovery
 import pkg/dagger/blocktype as bt
+import pkg/dagger/contracts
 
 import ./helpers
 
@@ -35,6 +36,7 @@ suite "Test Node":
     store: NetworkStore
     node: DaggerNodeRef
     discovery: Discovery
+    contracts: ContractInteractions
 
   setup:
     file = open(path.splitFile().dir /../ "fixtures" / "test.jpg")
@@ -46,7 +48,8 @@ suite "Test Node":
     discovery = Discovery.new(switch.peerInfo, Port(0))
     engine = BlockExcEngine.new(localStore, wallet, network, discovery)
     store = NetworkStore.new(engine, localStore)
-    node = DaggerNodeRef.new(switch, store, engine, nil, discovery, nil) # TODO: pass `Erasure`
+    contracts = ContractInteractions.new()
+    node = DaggerNodeRef.new(switch, store, engine, nil, discovery, contracts) # TODO: pass `Erasure`
 
     await node.start()