diff --git a/packages/core-sdk/src/erc20/handler.ts b/packages/core-sdk/src/erc20/handler.ts
index 211d92e58..9348c9c9a 100644
--- a/packages/core-sdk/src/erc20/handler.ts
+++ b/packages/core-sdk/src/erc20/handler.ts
@@ -1,4 +1,4 @@
-import { Web3LibAdapter } from "@bosonprotocol/common";
+import { Web3LibAdapter, TransactionRequest } from "@bosonprotocol/common";
 import { BigNumber, BigNumberish } from "@ethersproject/bignumber";
 import { erc20Iface } from "./interface";
 
@@ -7,8 +7,10 @@ export async function approve(args: {
   spender: string;
   value: BigNumberish;
   web3Lib: Web3LibAdapter;
+  txRequest?: TransactionRequest;
 }) {
   return args.web3Lib.sendTransaction({
+    ...args.txRequest,
     to: args.contractAddress,
     data: erc20Iface.encodeFunctionData("approve", [args.spender, args.value])
   });
@@ -74,6 +76,7 @@ export async function ensureAllowance(args: {
   contractAddress: string;
   value: BigNumberish;
   web3Lib: Web3LibAdapter;
+  txRequest?: TransactionRequest;
 }) {
   const allowance = await getAllowance(args);
   if (BigNumber.from(allowance).lt(args.value)) {
diff --git a/packages/core-sdk/src/erc721/handler.ts b/packages/core-sdk/src/erc721/handler.ts
index d20f67480..ce4f37815 100644
--- a/packages/core-sdk/src/erc721/handler.ts
+++ b/packages/core-sdk/src/erc721/handler.ts
@@ -1,4 +1,4 @@
-import { Web3LibAdapter } from "@bosonprotocol/common";
+import { TransactionRequest, Web3LibAdapter } from "@bosonprotocol/common";
 import { BigNumberish } from "@ethersproject/bignumber";
 import { erc721Iface } from "./interface";
 
@@ -101,8 +101,10 @@ export async function setApprovalForAll(args: {
   operator: string;
   approved: boolean;
   web3Lib: Web3LibAdapter;
+  txRequest?: TransactionRequest;
 }) {
   return args.web3Lib.sendTransaction({
+    ...args.txRequest,
     to: args.contractAddress,
     data: erc721Iface.encodeFunctionData("setApprovalForAll", [
       args.operator,
diff --git a/packages/core-sdk/src/marketplaces/opensea.ts b/packages/core-sdk/src/marketplaces/opensea.ts
index 9a8d9e013..4a58e9ff3 100644
--- a/packages/core-sdk/src/marketplaces/opensea.ts
+++ b/packages/core-sdk/src/marketplaces/opensea.ts
@@ -253,7 +253,7 @@ export class OpenSeaMarketplace extends Marketplace {
     const protocolAddress = listing.protocolAddress || this._contracts.seaport;
     if (!protocolAddress) {
       throw new Error(
-        `Seaport protocol address must be specified in Lsiting or CoreSDK config`
+        `Seaport protocol address must be specified in Listing or CoreSDK config`
       );
     }
 
@@ -265,18 +265,24 @@ export class OpenSeaMarketplace extends Marketplace {
     return this.convertOsOrder(osOrder);
   }
 
-  public async buildAdvancedOrder(asset: {
-    contract: string;
-    tokenId: string;
-  }): Promise<AdvancedOrder> {
+  public async buildAdvancedOrder(
+    asset: {
+      contract: string;
+      tokenId: string;
+    },
+    withWrapper = false
+  ): Promise<AdvancedOrder> {
     // Asumption: we're fulfilling a Bid Order (don't know if it makes sense with an Ask order)
     const osOrder = await this._handler.api.getOrder({
       assetContractAddress: asset.contract,
       tokenId: asset.tokenId,
       side: OrderSide.BID
     });
+    const fulfillerAddress = 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(
-      this._contracts.priceDiscoveryClient, // the address of the PriceDiscoveryClient contract, which will call the fulfilment method
+      fulfillerAddress,
       osOrder.orderHash,
       osOrder.protocolAddress,
       osOrder.side
diff --git a/packages/core-sdk/src/marketplaces/types.ts b/packages/core-sdk/src/marketplaces/types.ts
index 5d2dca774..0972559a2 100644
--- a/packages/core-sdk/src/marketplaces/types.ts
+++ b/packages/core-sdk/src/marketplaces/types.ts
@@ -82,10 +82,13 @@ export abstract class Marketplace {
     },
     withWrapper?: boolean
   ): Promise<PriceDiscoveryStruct>;
-  public abstract buildAdvancedOrder(asset: {
-    contract: string;
-    tokenId: string;
-  }): Promise<AdvancedOrder>;
+  public abstract buildAdvancedOrder(
+    asset: {
+      contract: string;
+      tokenId: string;
+    },
+    withWrapper?: boolean
+  ): Promise<AdvancedOrder>;
   public abstract wrapVouchers(
     contract: string,
     tokenIds: string[]