feat: init merchant fulfillment

src/http.ts

@@ -79,6 +79,7 @@ export enum Resource {
   Sellers = 'Sellers',
   Subscriptions = 'Subscriptions',
   Feeds = 'Feeds',
+  MerchantFulfillment = 'MerchantFulfillment',
 }
 
 export interface ResourceActions {
@@ -151,6 +152,13 @@ export interface ResourceActions {
     | 'GetFeedSubmissionCount'
     | 'CancelFeedSubmissions'
     | 'GetFeedSubmissionResult'
+  [Resource.MerchantFulfillment]:
+    | 'GetEligibleShippingServices'
+    | 'GetAdditionalSellerInputs'
+    | 'CreateShipment'
+    | 'GetShipment'
+    | 'CancelShipment'
+    | 'GetServiceStatus'
 }
 
 export interface Request {

src/mws.ts

@@ -2,6 +2,7 @@ import { HttpClient } from './http'
 import { Feeds } from './sections/feeds'
 import { Finances } from './sections/finances/finances'
 import { FulfillmentInventory } from './sections/fulfillment-inventory'
+import { MerchantFulfillment } from './sections/merchant-fulfillment'
 import { Orders } from './sections/orders'
 import { Products } from './sections/products/products'
 import { Reports } from './sections/reports'
@@ -15,6 +16,8 @@ export class MWS {
 
   private _fulfillmentInventory!: FulfillmentInventory
 
+  private _merchantFulfillment!: MerchantFulfillment
+
   private _orders!: Orders
 
   private _products!: Products
@@ -67,6 +70,14 @@ export class MWS {
     return this._fulfillmentInventory
   }
 
+  get merchantFulfillment() {
+    if (!this._merchantFulfillment) {
+      this._merchantFulfillment = new MerchantFulfillment(this.httpClient)
+    }
+
+    return this._merchantFulfillment
+  }
+
   get products() {
     if (!this._products) {
       this._products = new Products(this.httpClient)

src/sections/merchant-fulfillment.ts

@@ -0,0 +1,16 @@
+import { HttpClient, Resource } from '../http'
+import { getServiceStatusByResource } from './shared'
+
+const MERCHANT_FULFILLMENT_API_VERSION = '2011-07-01'
+
+export class MerchantFulfillment {
+  constructor(private httpClient: HttpClient) {}
+
+  async getServiceStatus() {
+    return getServiceStatusByResource(
+      this.httpClient,
+      Resource.MerchantFulfillment,
+      MERCHANT_FULFILLMENT_API_VERSION,
+    )
+  }
+}