#11 Validating Block Structure part Two

Author: serranoarevalo

src/index.ts

@@ -64,16 +64,35 @@ const createNewBlock = (data: string): Block => {
     data,
     newTimestamp
   );
+  addBlock(newBlock);
   return newBlock;
 };
 
+const getHashforBlock = (aBlock: Block): string =>
+  Block.calculateBlockHash(
+    aBlock.index,
+    aBlock.previousHash,
+    aBlock.timestamp,
+    aBlock.data
+  );
+
 const isBlockValid = (candidateBlock: Block, previousBlock: Block): boolean => {
   if (!Block.validateStructure(candidateBlock)) {
     return false;
   } else if (previousBlock.index + 1 !== candidateBlock.index) {
     return false;
   } else if (previousBlock.hash !== candidateBlock.previousHash) {
     return false;
+  } else if (getHashforBlock(candidateBlock) !== candidateBlock.hash) {
+    return false;
+  } else {
+    return true;
+  }
+};
+
+const addBlock = (candidateBlock: Block): void => {
+  if (isBlockValid(candidateBlock, getLatestBlock())) {
+    blockchain.push(candidateBlock);
   }
 };