Add CosmWasmClient.getBlock

packages/sdk/package.json

@@ -42,5 +42,8 @@
     "@iov/encoding": "^2.0.2",
     "@iov/utils": "^2.0.2",
     "axios": "^0.19.0"
+  },
+  "devDependencies": {
+    "readonly-date": "^1.0.0"
   }
 }

packages/sdk/src/cosmwasmclient.spec.ts

@@ -1,6 +1,7 @@
 /* eslint-disable @typescript-eslint/camelcase */
 import { Bech32, Encoding } from "@iov/encoding";
 import { assert, sleep } from "@iov/utils";
+import { ReadonlyDate } from "readonly-date";
 
 import { CosmWasmClient } from "./cosmwasmclient";
 import { makeSignBytes, marshalTx } from "./encoding";
@@ -74,6 +75,49 @@ describe("CosmWasmClient", () => {
     });
   });
 
+  describe("getBlock", () => {
+    it("works for latest block", async () => {
+      pendingWithoutCosmos();
+      const client = CosmWasmClient.makeReadOnly(httpUrl);
+      const response = await client.getBlock();
+
+      // id
+      expect(response.block_id.hash).toMatch(/^[0-9A-F]{64}$/);
+
+      // header
+      expect(parseInt(response.block.header.height, 10)).toBeGreaterThanOrEqual(1);
+      expect(response.block.header.chain_id).toEqual(await client.chainId());
+      expect(new ReadonlyDate(response.block.header.time).getTime()).toBeLessThan(ReadonlyDate.now());
+      expect(new ReadonlyDate(response.block.header.time).getTime()).toBeGreaterThanOrEqual(
+        ReadonlyDate.now() - 5_000,
+      );
+
+      // data
+      expect(response.block.data.txs === null || Array.isArray(response.block.data.txs)).toEqual(true);
+    });
+
+    it("works for block by height", async () => {
+      pendingWithoutCosmos();
+      const client = CosmWasmClient.makeReadOnly(httpUrl);
+      const height = parseInt((await client.getBlock()).block.header.height, 10);
+      const response = await client.getBlock(height - 1);
+
+      // id
+      expect(response.block_id.hash).toMatch(/^[0-9A-F]{64}$/);
+
+      // header
+      expect(response.block.header.height).toEqual(`${height - 1}`);
+      expect(response.block.header.chain_id).toEqual(await client.chainId());
+      expect(new ReadonlyDate(response.block.header.time).getTime()).toBeLessThan(ReadonlyDate.now());
+      expect(new ReadonlyDate(response.block.header.time).getTime()).toBeGreaterThanOrEqual(
+        ReadonlyDate.now() - 5_000,
+      );
+
+      // data
+      expect(response.block.data.txs === null || Array.isArray(response.block.data.txs)).toEqual(true);
+    });
+  });
+
   describe("getIdentifier", () => {
     it("works", async () => {
       pendingWithoutCosmos();

packages/sdk/src/cosmwasmclient.ts

@@ -3,7 +3,7 @@ import { Encoding } from "@iov/encoding";
 
 import { makeSignBytes, marshalTx } from "./encoding";
 import { findAttribute, Log, parseLogs } from "./logs";
-import { RestClient, TxsResponse } from "./restclient";
+import { BlockResponse, RestClient, TxsResponse } from "./restclient";
 import {
   Coin,
   CosmosSdkTx,
@@ -157,6 +157,19 @@ export class CosmWasmClient {
     };
   }
 
+  /**
+   * Gets block header and meta
+   *
+   * @param height The height of the block. If undefined, the latest height is used.
+   */
+  public async getBlock(height?: number): Promise<BlockResponse> {
+    if (height !== undefined) {
+      return this.restClient.blocks(height);
+    } else {
+      return this.restClient.blocksLatest();
+    }
+  }
+
   public async searchTx(query: SearchTxQuery): Promise<readonly TxsResponse[]> {
     // TODO: we need proper pagination support
     function limited(originalQuery: string): string {

packages/sdk/types/cosmwasmclient.d.ts

@@ -1,5 +1,5 @@
 import { Log } from "./logs";
-import { TxsResponse } from "./restclient";
+import { BlockResponse, TxsResponse } from "./restclient";
 import { Coin, CosmosSdkTx, StdSignature } from "./types";
 export interface SigningCallback {
   (signBytes: Uint8Array): Promise<StdSignature>;
@@ -46,6 +46,12 @@ export declare class CosmWasmClient {
    * @param address returns data for this address. When unset, the client's sender adddress is used.
    */
   getNonce(address?: string): Promise<GetNonceResult>;
+  /**
+   * Gets block header and meta
+   *
+   * @param height The height of the block. If undefined, the latest height is used.
+   */
+  getBlock(height?: number): Promise<BlockResponse>;
   searchTx(query: SearchTxQuery): Promise<readonly TxsResponse[]>;
   postTx(tx: Uint8Array): Promise<PostTxResult>;
   /** Uploads code and returns a code ID */