Update PriceFeed schema and methods + v1 release (#8)

* Update PriceFeed schema and methods + v1 release

* Address comments + make schema simpler

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@pythnetwork/pyth-sdk-js",
-  "version": "0.3.0",
+  "version": "1.0.0",
   "description": "Pyth Network SDK in JS",
   "homepage": "https://pyth.network",
   "main": "lib/index.js",

src/__tests__/PriceFeed.test.ts

@@ -1,125 +1,74 @@
-import { Price, PriceFeed, PriceFeedMetadata, PriceStatus } from "../index";
+import { Price, PriceFeed, PriceFeedMetadata } from "../index";
 
 beforeAll(() => {
   jest.useFakeTimers();
 });
 
 test("Parsing Price Feed works as expected", () => {
   const data = {
-    conf: "1",
-    ema_conf: "2",
-    ema_price: "3",
-    expo: 4,
+    ema_price: {
+      conf: "2",
+      expo: 4,
+      price: "3",
+      publish_time: 11,
+    },
     id: "abcdef0123456789",
-    max_num_publishers: 6,
-    num_publishers: 5,
-    prev_conf: "7",
-    prev_price: "8",
-    prev_publish_time: 9,
-    price: "10",
-    product_id: "0123456789abcdef",
-    publish_time: 11,
-    status: PriceStatus.Trading,
+    price: {
+      conf: "1",
+      expo: 4,
+      price: "10",
+      publish_time: 11,
+    },
   };
 
   const priceFeed = PriceFeed.fromJson(data);
-  expect(priceFeed.status).toBe(PriceStatus.Trading);
-  expect(priceFeed.expo).toBe(4);
   expect(priceFeed.id).toBe("abcdef0123456789");
-  expect(priceFeed.maxNumPublishers).toBe(6);
-  expect(priceFeed.numPublishers).toBe(5);
-  expect(priceFeed.productId).toBe("0123456789abcdef");
-  expect(priceFeed.publishTime).toBe(11);
-  expect(priceFeed.getCurrentPrice()).toStrictEqual(new Price("1", 4, "10"));
-  expect(priceFeed.getEmaPrice()).toStrictEqual(new Price("2", 4, "3"));
-  expect(priceFeed.getLatestAvailablePriceUnchecked()).toStrictEqual([
-    new Price("1", 4, "10"),
-    11,
-  ]);
-
-  jest.setSystemTime(20000);
-  expect(priceFeed.getLatestAvailablePriceWithinDuration(15)).toStrictEqual(
-    new Price("1", 4, "10")
-  );
-  expect(priceFeed.getLatestAvailablePriceWithinDuration(5)).toBeUndefined();
-  expect(priceFeed.toJson()).toEqual(data);
-});
 
-test("getCurrentPrice returns undefined if status is not Trading", () => {
-  const data = {
+  const expectedPrice = new Price({
     conf: "1",
-    ema_conf: "2",
-    ema_price: "3",
     expo: 4,
-    id: "abcdef0123456789",
-    max_num_publishers: 6,
-    num_publishers: 5,
-    prev_conf: "7",
-    prev_price: "8",
-    prev_publish_time: 9,
     price: "10",
-    product_id: "0123456789abcdef",
-    publish_time: 11,
-    status: PriceStatus.Unknown,
-  };
-
-  const priceFeed = PriceFeed.fromJson(data);
-  expect(priceFeed.getCurrentPrice()).toBeUndefined();
-});
+    publishTime: 11,
+  });
+  expect(priceFeed.getPriceUnchecked()).toStrictEqual(expectedPrice);
 
-test("getLatestAvailablePrice returns prevPrice when status is not Trading", () => {
-  const data = {
-    conf: "1",
-    ema_conf: "2",
-    ema_price: "3",
+  const expectedEmaPrice = new Price({
+    conf: "2",
     expo: 4,
-    id: "abcdef0123456789",
-    max_num_publishers: 6,
-    num_publishers: 5,
-    prev_conf: "7",
-    prev_price: "8",
-    prev_publish_time: 9,
-    price: "10",
-    product_id: "0123456789abcdef",
-    publish_time: 11,
-    status: PriceStatus.Unknown,
-  };
-
-  const priceFeed = PriceFeed.fromJson(data);
-
-  expect(priceFeed.getLatestAvailablePriceUnchecked()).toStrictEqual([
-    new Price("7", 4, "8"),
-    9,
-  ]);
+    price: "3",
+    publishTime: 11,
+  });
+  expect(priceFeed.getEmaPriceUnchecked()).toStrictEqual(expectedEmaPrice);
 
   jest.setSystemTime(20000);
-  expect(priceFeed.getLatestAvailablePriceWithinDuration(15)).toStrictEqual(
-    new Price("7", 4, "8")
-  );
-  expect(priceFeed.getLatestAvailablePriceWithinDuration(10)).toBeUndefined();
+  expect(priceFeed.getPriceNoOlderThan(15)).toStrictEqual(expectedPrice);
+  expect(priceFeed.getPriceNoOlderThan(5)).toBeUndefined();
+  expect(priceFeed.getEmaPriceNoOlderThan(15)).toStrictEqual(expectedEmaPrice);
+  expect(priceFeed.getEmaPriceNoOlderThan(5)).toBeUndefined();
+
+  expect(priceFeed.toJson()).toEqual(data);
 });
 
 test("getMetadata returns PriceFeedMetadata as expected", () => {
   const data = {
-    conf: "1",
-    ema_conf: "2",
-    ema_price: "3",
-    expo: 4,
+    ema_price: {
+      conf: "2",
+      expo: 4,
+      price: "3",
+      publish_time: 11,
+    },
     id: "abcdef0123456789",
-    max_num_publishers: 6,
+    price: {
+      conf: "1",
+      expo: 4,
+      price: "10",
+      publish_time: 11,
+    },
     metadata: {
       attestation_time: 7,
       emitter_chain: 8,
       sequence_number: 9,
     },
-    num_publishers: 10,
-    prev_conf: "11",
-    prev_price: "12",
-    prev_publish_time: 13,
-    price: "14",
-    product_id: "0123456789abcdef",
-    publish_time: 16,
-    status: PriceStatus.Unknown,
   };
 
   const priceFeed = PriceFeed.fromJson(data);