diff --git a/e2e/tests/opensea-price-discovery.test.ts b/e2e/tests/opensea-price-discovery.test.ts
index dafc2c455..176d424d2 100644
--- a/e2e/tests/opensea-price-discovery.test.ts
+++ b/e2e/tests/opensea-price-discovery.test.ts
@@ -532,13 +532,11 @@ describe("Opensea Price Discovery", () => {
         sellerCoreSDK
       );
       // Call commitToPriceDiscoveryOffer, that will fulfil the Order on Seaport
-      const fulfilmentData = await openseaSdkSeller.generateFulfilmentData(
-        {
-          contract: voucherContract,
-          tokenId: listing.asset.tokenId
-        },
-        true // withWrapper
-      );
+      const fulfilmentData = await openseaSdkSeller.generateFulfilmentData({
+        contract: voucherContract,
+        tokenId: listing.asset.tokenId,
+        withWrapper: true
+      });
       const txCommit = await sellerCoreSDK.commitToPriceDiscoveryOffer(
         buyerWallet.address,
         listing.asset.tokenId,
diff --git a/packages/core-sdk/src/marketplaces/opensea.ts b/packages/core-sdk/src/marketplaces/opensea.ts
index 6897a9c1f..cd2d32a39 100644
--- a/packages/core-sdk/src/marketplaces/opensea.ts
+++ b/packages/core-sdk/src/marketplaces/opensea.ts
@@ -273,9 +273,9 @@ export class OpenSeaMarketplace extends Marketplace {
     asset: {
       contract: string;
       tokenId: string;
+      withWrapper?: boolean;
     },
-    filter: OrderFilterOptions = {},
-    withWrapper = false
+    filter: OrderFilterOptions = {}
   ): Promise<AdvancedOrder> {
     // Assumption: we're fulfilling a Bid Order (don't know if it makes sense with an Ask order)
     const osOrder = await this._handler.api.getOrder({
@@ -284,7 +284,7 @@ export class OpenSeaMarketplace extends Marketplace {
       side: OrderSide.BID,
       ...filter
     });
-    const fulfillerAddress = withWrapper
+    const fulfillerAddress = asset.withWrapper
       ? asset.contract // If the token is wrapped, the fulfiller is the wrapper contract itself
       : this._contracts.priceDiscoveryClient; // otherwise the address of the PriceDiscoveryClient contract
     const ffd = await this._handler.api.generateFulfillmentData(
@@ -303,13 +303,12 @@ export class OpenSeaMarketplace extends Marketplace {
     return inputData.orders[0];
   }
 
-  public async generateFulfilmentData(
-    asset: {
-      contract: string;
-      tokenId: string;
-    },
-    withWrapper = false
-  ): Promise<PriceDiscoveryStruct> {
+  public async generateFulfilmentData(asset: {
+    contract: string;
+    tokenId: string;
+    withWrapper?: boolean;
+  }): Promise<PriceDiscoveryStruct> {
+    const withWrapper = !!asset.withWrapper;
     const wrapper = withWrapper
       ? await this.getOrCreateVouchersWrapper(asset.contract)
       : undefined;
@@ -595,8 +594,8 @@ export class OpenSeaMarketplace extends Marketplace {
       contract: string;
       tokenId: string;
     },
-    filter: OrderFilterOptions = {},
-    side: Side
+    side: Side,
+    filter: OrderFilterOptions = {}
   ): Promise<SignedOrder> {
     const osOrder = await this._handler.api.getOrder({
       assetContractAddress: asset.contract,
@@ -617,8 +616,8 @@ export class OpenSeaMarketplace extends Marketplace {
       contract: string;
       tokenIds: string[];
     },
-    filter: OrderFilterOptions = {},
-    side: Side
+    side: Side,
+    filter: OrderFilterOptions = {}
   ): Promise<SignedOrder[]> {
     const { orders } = await this._handler.api.getOrders({
       assetContractAddress: asset.contract,
diff --git a/packages/core-sdk/src/marketplaces/types.ts b/packages/core-sdk/src/marketplaces/types.ts
index 2f8ef29fd..f324079a8 100644
--- a/packages/core-sdk/src/marketplaces/types.ts
+++ b/packages/core-sdk/src/marketplaces/types.ts
@@ -82,31 +82,29 @@ export abstract class Marketplace {
       contract: string;
       tokenId: string;
     },
-    filter: OrderFilterOptions,
-    side: Side
+    side: Side,
+    filter?: OrderFilterOptions
   ): Promise<SignedOrder>;
   public abstract getOrders(
     asset: {
       contract: string;
       tokenIds: string[];
     },
-    filter: OrderFilterOptions,
-    side: Side
+    side: Side,
+    filter?: OrderFilterOptions
   ): Promise<SignedOrder[]>;
-  public abstract generateFulfilmentData(
-    asset: {
-      contract: string;
-      tokenId: string;
-    },
-    withWrapper?: boolean
-  ): Promise<PriceDiscoveryStruct>;
+  public abstract generateFulfilmentData(asset: {
+    contract: string;
+    tokenId: string;
+    withWrapper?: boolean;
+  }): Promise<PriceDiscoveryStruct>;
   public abstract buildAdvancedOrder(
     asset: {
       contract: string;
       tokenId: string;
+      withWrapper?: boolean;
     },
-    filter: OrderFilterOptions,
-    withWrapper?: boolean
+    filter?: OrderFilterOptions
   ): Promise<AdvancedOrder>;
   public abstract wrapVouchers(
     contract: string,
diff --git a/scripts/opensea/fulfil-order.ts b/scripts/opensea/fulfil-order.ts
index f9774c4f9..7fdf75570 100644
--- a/scripts/opensea/fulfil-order.ts
+++ b/scripts/opensea/fulfil-order.ts
@@ -94,13 +94,11 @@ async function main() {
     );
   }
   console.log("ORDER TO BE FULFILLED", order);
-  const priceDiscoveryStruct = await openseaSdkSeller.generateFulfilmentData(
-    {
-      contract: nftContract,
-      tokenId
-    },
-    wrapped
-  );
+  const priceDiscoveryStruct = await openseaSdkSeller.generateFulfilmentData({
+    contract: nftContract,
+    tokenId,
+    withWrapper: wrapped
+  });
 
   const BOSON_PROTOCOL = defaultConfig.contracts.protocolDiamond;