First Commit

README.md

@@ -1 +1,7 @@
-# programmatically-retrieving-blockchain-data
+# A blog series about programmatically access the blockchain
+
+## Summary
+The blog series https://laurencevandeyar.com/category/blockchain/programmatically-retrieving-blockchain-data/focuses on the process of programmatically retrieving blockchain data using Node.js and Web3. The series delves into practical techniques for interacting with blockchain networks, particularly Ethereum-like chains, through code. It explores how to establish connections to blockchain nodes, fetch transaction details from blocks, and gather insights from the blockchain's transaction history. By guiding readers through the steps involved in using the Web3 library, the series empowers developers, researchers, and blockchain enthusiasts to access and analyze blockchain data programmatically, unlocking a deeper understanding of decentralized ledger technology.
+
+## License
+MIT

part2.js

@@ -0,0 +1,49 @@
+#!/usr/bin/node
+
+const { Web3 } = require('web3');
+
+var quicknodeurl = 'YOUR_QUICKNODE_URL';
+
+// Replace this with the BSC mainnet provider URL
+const providerUrl = quicknodeurl
+
+const web3 = new Web3(providerUrl);
+
+async function getTransactionDetails(transactionHash) {
+    try {
+        const transaction = await web3.eth.getTransaction(transactionHash);
+        console.log('Transaction:', transaction);
+    } catch (error) {
+        console.error('Error fetching transaction details:', error);
+    }
+}
+
+async function getBlockTransactions(blockNumber) {
+    try {
+        const block = await web3.eth.getBlock(blockNumber);
+        console.log('Block Number:', block.number);
+        console.log('Block Transactions:', block.transactions);
+
+        for (const transactionHash of block.transactions) {
+            await getTransactionDetails(transactionHash);
+        }
+    } catch (error) {
+        console.error('Error fetching block transactions:', error);
+    }
+}
+
+async function fetchAllBlocks() {
+    try {
+        const latestBlockNumber = await web3.eth.getBlockNumber();
+        const genesisBlockNumber = 0;
+
+        for (let blockNumber = latestBlockNumber; blockNumber >= genesisBlockNumber; blockNumber--) {
+            console.log('Fetching block:', blockNumber);
+            await getBlockTransactions(blockNumber);
+        }
+    } catch (error) {
+        console.error('Error fetching blocks:', error);
+    }
+}
+
+fetchAllBlocks();