adding examples

examples/fetch-blocks/index.js

@@ -0,0 +1,27 @@
+// Import Push Chain SDK
+import { CONSTANTS, PushChain } from '@pushchain/devnet';
+
+// Initialize the Push Chain SDK
+const pushChain = await PushChain.initialize();
+
+// Fetch block by hash
+const blockByHash = await pushChain.block.get(
+  '28ca25bb8a0b59b76612bcef411984d60f28d0468676fc755ed8f946433d0c64'
+);
+
+console.log(blockByHash);
+
+// Fetch the latest 20 blocks
+const latestBlocks = await pushChain.block.get('*', {
+  limit: 20,
+});
+
+console.log(latestBlocks);
+
+// Fetch blocks by dates - yesterday
+const blockByData = await pushChain.block.get('*', {
+  startTime: Math.floor(Date.now() - 24 * 60 * 60 * 1000),
+  order: 'ASC',
+});
+
+console.log(blockByData);