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Dev Release 40

May 28, 2024

Greetings BlockDAG Community,


We're excited to unveil our journey in creating BlockDAGscan, a user-friendly, robust, and transparent blockchain explorer. Our story begins with understanding user needs, crafting a meticulous system architecture, and selecting a scalable, efficient, and secure technology stack. Join us as we delve into the detailed planning and documentation that forms the backbone of BlockDAGscan, and discover the path forward as we bring this innovative project to life.

BlockDAG: Advanced Address Formats and Offchain Implementation

Building on our previous exploration of address formats in BlockDAG, this post focuses on advanced concepts and the practical aspects of offchain implementation. As blockchain technology evolves, especially with Directed Acyclic Graph (DAG) structures, understanding these details becomes crucial for developers and users aiming to leverage the full potential of BlockDAG systems.


Address Formats in BlockDAG
Address formats in BlockDAG are designed to optimize security, usability, and compatibility with the underlying DAG architecture. Here, we dive deeper into the advanced features and structures of these addresses.


Core Components:

  • Base32 Encoding:

Purpose: Base32 encoding offers a balance between readability and compactness, ideal for scenarios where alphanumeric addresses are needed.



  • Checksums and Error Detection:

Purpose: Ensures the address is correctly typed and not corrupted, enhancing reliability.

Implementation: Involves appending a portion of a hash (e.g., SHA-256) as a checksum to the address.


  • Prefixes and Address Types:

Purpose: Differentiate between various types of addresses (e.g., standard, multi-signature, contract addresses).

Examples: Custom prefixes can be defined for specific use cases, such as DAG1 for standard addresses.

Generating and Validating Addresses in BlockDAG: The process of address generation and validation in BlockDAG systems involves several cryptographic steps to ensure the addresses are secure and unique.

The process of address generation and validation in BlockDAG systems involves several cryptographic steps to ensure the addresses are secure and unique.

Address Generation

  • Private Key Generation:

Implementation: Using secure random number generators to create a private key.


use rand::Rng;

fn generate_private_key() -> [u8; 32] {
   let mut rng = rand::thread_rng();
   let mut private_key = [0u8; 32];
rng.fill(&mut private_key);


  • Public Key Derivation:

Implementation: Applying elliptic curve multiplication to derive the public key from the private key.


use secp256k1::{Secp256k1, PublicKey};

fn derive_public_key(private_key: &[u8; 32]) -> PublicKey {
   let secp = Secp256k1::new();
   let secret_key = secp256k1::SecretKey::from_slice(private_key).expect("32 bytes, within curve order");
PublicKey::from_secret_key(&secp, &secret_key)


  • Hashing Public Key:

Implementation: Using a hash function (e.g., SHA-256 followed by RIPEMD-160) to hash the public key.


use sha2::{Sha256, Digest};
use ripemd160::Ripemd160;

fn hash_public_key(public_key: &PublicKey) -> [u8; 20] {
   let sha256_hash = Sha256::digest(public_key.serialize());
   let ripemd160_hash = Ripemd160::digest(&sha256_hash);


  • Encoding with Base32:

Implementation: Converting the hashed public key into a Base32 encoded address.


extern crate base32;

fn base32_encode(data: &[u8]) -> String {
base32::encode(base32::Alphabet::RFC4648 { padding: false }, data)


Validating Addresses:

  • Checksum Verification:

Implementation: Ensuring the checksum appended to the address is correct.


fn verify_checksum(address: &str) -> bool {
   let decoded = base32::decode(base32::Alphabet::RFC4648 { padding: false }, address).unwrap();
   let (data, checksum) = decoded.split_at(decoded.len() - 4);
   let hash = Sha256::digest(&Sha256::digest(data));
&hash[..4] == checksum


  • Address Validation:

Implementation: Checking the structure and checksum of the address to ensure its validity.

fn validate_address(address: &str) -> bool {
// Decode the address using Base32
   let decoded = base32::decode(base32::Alphabet::RFC4648 { padding: false }, address).unwrap();
   if decoded.len() != 25 {
       return false;
// Verify the checksum


Understanding the advanced address format implementation in BlockDAG systems is fundamental for optimizing blockchain performance and security. These elements provide a robust framework for managing blockchain addresses and keys, ensuring a secure, scalable blockchain environment.

BlockDAG Scan: Planning the Technical Implementation

Every great project starts with a vision, and for BlockDAGscan, our vision was clear: to create a user-friendly, robust, and transparent blockchain explorer. Here’s how we began:


  • Researching about our Users: We embarked on this journey by understanding the needs and expectations of our users, ensuring that BlockDAGscan would be tailored to meet their requirements.
  • Crafting the Blueprint: Our technical architects meticulously designed the system’s architecture, mapping out server-client interactions, data processing pipelines, and user interface components.
  • Choosing the Right Tools: We carefully selected a technology stack that would guarantee scalability, efficiency, and security for our users.


The Blueprint: Technical Documentation and Diagrams
Creating BlockDAGscan required detailed planning and precise documentation. Here are the key elements that guided our development:


  1. System Architecture Diagram: This diagram served as our project's blueprint, illustrating the high-level components and how they interact, ensuring a seamless flow of data.
  2. Database Schema: We designed a robust database schema, detailing tables, fields, relationships, and indexing strategies to enable efficient data storage and retrieval.
  3. API Documentation: Our comprehensive API guide outlined RESTful endpoints, request and response formats, authentication mechanisms, and example usage scenarios.
  4. User Interface Wireframes: Visual layouts of the user interface helped us plan the user experience, ensuring intuitive navigation and functionality.
  5. Security and Compliance Documentation: We documented our security measures and compliance strategies to protect data integrity and user privacy.
  6. Workflow Diagrams: These diagrams depicted the sequence of operations for key functionalities like block retrieval, transaction search, and address lookups, ensuring a smooth user experience.


The Path Forward: Development and Community Engagement
With our plans laid out and documentation in hand, we are now ready to bring BlockDAGscan to life. Here’s what lies ahead:


  • Development Sprints: We are implementing features and functionalities in iterative sprints, allowing us to make steady progress and continuously improve.
  • Rigorous Testing: Each component will undergo thorough testing to ensure BlockDAGscan is reliable and robust.
  • Community Collaboration: We value our community’s input and will actively seek feedback to refine and enhance BlockDAGscan, ensuring it exceeds user expectations.
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