completed

blockchain.json

@@ -1,6 +1,6 @@
 [
   {
-    "hash": "0",
-    "previousHash": null
+    "previousHash": null,
+    "hash": "0"
   }
 ]

src/add-block.js

@@ -11,10 +11,18 @@ const addBlock = () => {
 	const transactions = getTransactions();
 
 	// Create a hash, previousHash and transactions property for newBlock and push that into blockchain
-
-	blockchain.push();
+	const newBlock={
+		previousHash: previousBlock.hash,
+		hash:previousBlock.hash+20,
+		transactions:[{
+			fromAddress: "123",
+			toAddress: "456",
+			amount: 789,
+		}],
+	};
+	blockchain.push(newBlock);
 	writeBlockchain(blockchain);
 	writeTransactions([]);
 };
 
-module.exports = { addBlock };
+module.exports = { addBlock };

src/add-transaction.js

@@ -7,10 +7,14 @@ const addTransaction = () => {
 
 	// Xreate new transactions and push them into transactions.json containing the above properties
 	// Refer blockchain-helpers.js for writeTransactions and getTransactions
-
+	const newTransaction ={
+		fromAddress: "123",
+		toAddress: "456",
+		amount: 789,
+	};
 	const transactions = getTransactions();
-	transactions.push();
+	transactions.push(newTransaction);
 	writeTransactions(transactions);
 };
 
-module.exports = { addTransaction };
+module.exports = { addTransaction };

src/init-blockchain.js

@@ -4,6 +4,11 @@ const { writeBlockchain } = require("./blockchain-helpers");
 
 const initBlockchain = () => {
 	// Create a genesisBlock and add appropriate hash and previous hash property to genesisBlock
+	const genesisBlock={
+		previousHash:null,
+		hash: "0"
+	};
+	const blockchain = [genesisBlock];
 
 	// Create a blockchain constant containing genesisBlock
 	// Refer writeBlockchain function from blockchain-helpers

transactions.json

@@ -1 +1,7 @@
-[]
+[
+  {
+    "fromAddress": "123",
+    "toAddress": "456",
+    "amount": 789
+  }
+]