Create block.js

core/sidra-chain/block.js

@@ -0,0 +1,16 @@
+class Block {
+  constructor(transactions, previousBlockHash) {
+    this.transactions = transactions;
+    this.previousBlockHash = previousBlockHash;
+  }
+
+  validate() {
+    // Validate the block and ensure it meets the protocol's requirements
+  }
+
+  process() {
+    // Process the block and update the chain state
+  }
+}
+
+export default Block;