diff --git a/crates/orderbook/src/events/order_placed.rs b/crates/orderbook/src/events/order_placed.rs
index b1a87c6e..c6c022dc 100644
--- a/crates/orderbook/src/events/order_placed.rs
+++ b/crates/orderbook/src/events/order_placed.rs
@@ -40,6 +40,14 @@ abigen!(
       {
         "name": "Erc721ToErc20",
         "type": "()"
+      },
+      {
+        "name": "Erc20ToErc1155",
+        "type": "()"
+      },
+      {
+        "name": "Erc1155ToErc20",
+        "type": "()"
       }
     ]
   },
@@ -198,3 +206,25 @@ impl TryFrom<EmittedEvent> for OrderPlaced {
         }
     }
 }
+
+impl From<&RouteType> for crate::RouteType {
+    fn from(value: &RouteType) -> Self {
+        match value {
+            RouteType::Erc20ToErc721 => crate::RouteType::Erc20ToErc721,
+            RouteType::Erc721ToErc20 => crate::RouteType::Erc721ToErc20,
+            RouteType::Erc20ToErc1155 => crate::RouteType::Erc20ToErc1155,
+            RouteType::Erc1155ToErc20 => crate::RouteType::Erc1155ToErc20,
+        }
+    }
+}
+
+impl From<&OrderType> for crate::OrderType {
+    fn from(value: &OrderType) -> Self {
+        match value {
+            OrderType::Listing => crate::OrderType::Listing,
+            OrderType::Auction => crate::OrderType::Auction,
+            OrderType::Offer => crate::OrderType::Offer,
+            OrderType::CollectionOffer => crate::OrderType::CollectionOffer,
+        }
+    }
+}
diff --git a/crates/orderbook/src/lib.rs b/crates/orderbook/src/lib.rs
index e140f9fb..3f9667b2 100644
--- a/crates/orderbook/src/lib.rs
+++ b/crates/orderbook/src/lib.rs
@@ -43,3 +43,29 @@ impl From<EmittedEvent> for Event {
         }
     }
 }
+
+pub enum RouteType {
+    Erc20ToErc721,
+    Erc721ToErc20,
+    Erc20ToErc1155,
+    Erc1155ToErc20,
+}
+
+pub enum OrderType {
+    Listing,
+    Auction,
+    Offer,
+    CollectionOffer,
+}
+
+pub mod error {
+    use starknet::core::types::Felt;
+
+    pub const CANCELLED_USER: Felt = Felt::from_hex_unchecked("0x43414e43454c4c45445f55534552");
+    pub const CANCELLED_BY_NEW_ORDER: Felt =
+        Felt::from_hex_unchecked("0x43414e43454c4c45445f4e45575f4f52444552");
+    pub const CANCELLED_ASSET_FAULT: Felt =
+        Felt::from_hex_unchecked("0x43414e43454c4c45445f41535345545f4641554c54");
+    pub const CANCELLED_OWNERSHIP: Felt =
+        Felt::from_hex_unchecked("0x43414e43454c4c45445f4f574e455253484950");
+}