feat(core-api): accept block height to list block transactions

__tests__/integration/core-api/v2/handlers/blocks.test.ts

@@ -119,6 +119,23 @@ describe("API 2.0 - Blocks", () => {
         );
     });
 
+    describe("GET /blocks/:height/transactions", () => {
+        describe.each([["API-Version", "request"], ["Accept", "requestWithAcceptHeader"]])(
+            'using the "%s" header',
+            (header, request) => {
+                it("should GET all the transactions for the given block by id", async () => {
+                    const response = await utils[request]("GET", `blocks/${genesisBlock.height}/transactions`);
+                    expect(response).toBeSuccessfulResponse();
+                    expect(response.data.data).toBeArray();
+
+                    const transaction = response.data.data[0];
+                    utils.expectTransaction(transaction);
+                    expect(transaction.blockId).toBe(genesisBlock.id);
+                });
+            },
+        );
+    });
+
     describe("POST /blocks/search", () => {
         describe.each([["API-Version", "request"], ["Accept", "requestWithAcceptHeader"]])(
             "using the %s header",

packages/core-api/src/versions/2/blocks/methods.ts

@@ -28,7 +28,7 @@ const show = async request => {
 };
 
 const transactions = async request => {
-    const block = await blocksRepository.findById(request.params.id);
+    const block = await blocksRepository.findByIdOrHeight(request.params.id);
 
     if (!block) {
         return Boom.notFound("Block not found");