Parsing Bitcoin Blockchain in C

Without External APIs

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As you’re working with NBitcoin, which is a .NET library for interacting with Bitcoin and Ethereum blockchain, we’ll explore a possible solution to parse the Bitcoin blockchain without using external APIs.

Disclaimer: This approach requires knowledge of Bitcoin’s blockchain structure and transactions. Additionally, due to the decentralized nature of the blockchain, this method might not provide accurate or up-to-date information on the balance of a specific address.

Overview:

———-

We’ll use the NBitcoin library’s built-in functionality to read the Bitcoin blockchain and then parse it to get the balance of a specific address. We’ll assume you have a new key pair created in C

using NBitcoin’s API.

Prerequisites:

• Install the [NBitcoin]( NuGet package

• Make sure you’re familiar with Bitcoin’s blockchain structure and transactions

Code:

using NBitcoin;


class Program

{

    static void Main(string[] args)

    {

        // Create a new key pair using NBitcoin

        KeyPair key = GetNewKeyPair();


        // Connect to the Bitcoin node (replace with your own node or create a test network)

        Node node = new TestNetNode(" // adjust according to your node's URL


        // Read the Bitcoin blockchain into a byte array

        byte[] blockchain = node.Blockchain().Read();


        // Parse the blockchain data using NBitcoin's Block class

        Block block = blockchain[0];


        // Find the transaction of interest (e.g., a "getaddrinfo" transaction, which contains the balance)

        Transaction tx = block.Transactions.FirstOrDefault(t => t.Type == 2);


        if (tx != null)

        {

            // Extract the address from the transaction

            string address = tx.Address;


            // Get the balance of the specified address using NBitcoin's Account class

            Account account = node.Accounts.Get(address);

            decimal balance = account.Balance;


            Console.WriteLine($"Address: {address}, Balance: {balance:C}");

        }

        else

        {

            Console.WriteLine("No transactions found.");

        }

    }


    // Helper function to create a new key pair using NBitcoin's API

    static KeyPair GetNewKeyPair()

    {

        return new KeyPair();

    }

}

Explanation:

• We connect to an in-memory Bitcoin node for the sake of simplicity.

• We read the entire blockchain into a byte array block.

• We parse the first block using NBitcoin’s Block class, which contains the transactions.

• We find the transaction containing the balance by filtering through the transactions (in this case, a “getaddrinfo” transaction).

• If the transaction is found, we extract the address from it and use NBitcoin’s Account class to get the balance.

Note: This solution assumes you’re working with an in-memory node or creating a test network. In a real-world scenario, using a live Bitcoin node is essential for accuracy. Additionally, please be aware that this approach might not provide accurate information on very short-term balances due to blockchain congestion and other factors.

Please keep in mind that this example provides a simplified solution and should not be used for production-grade applications without further testing and validation.

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