Welcome to BlockDAG Dashboard! 👋


Dev release 46

June 5, 2024

Greetings BlockDAG Community,

Enhancing Network Propagation in BlockDAG Systems
It was a long hectic day for blockDAG team as we're continuously working on the application part to make it available for everyone. Also, in parallel  we’re thrilled to update you on our recent advancements in improving network propagation within the BlockDAG framework. Efficient propagation of transactions and blocks is crucial for maintaining the performance, security, and scalability of the network. This post will detail the new techniques and optimizations we’ve implemented to enhance network propagation, ensuring faster and more reliable communication across the BlockDAG system.

Key Challenges in Network Propagation

Before diving into our solutions, it’s essential to understand the challenges we’ve been facing:

  • Latency Reduction: Minimizing the time it takes for transactions and blocks to propagate across the network.
  • Bandwidth Efficiency: Reducing the amount of data transmitted to prevent network congestion and improve scalability.
  • Reliability: Ensuring that all nodes receive the correct information without errors or loss.

New Techniques and Optimizations

1. Adaptive Gossip Protocol
We’ve adopted an adaptive gossip protocol to enhance the propagation efficiency:
Randomized Dissemination:
Transactions and blocks are randomly relayed to a subset of nodes, reducing redundancy and ensuring rapid dissemination without overloading any single node.
Adaptive Rate Control:
The gossip rate adjusts dynamically based on network conditions. During high load, the protocol slows down to prevent congestion, while under low load, it speeds up to ensure swift propagation.

2. Compact Block Propagation
To minimize the data transmitted across the network, we’ve implemented compact block propagation techniques:
Block Summarization:
Instead of transmitting the entire block, a summarized version containing only essential information (such as headers and unique identifiers) is initially sent. Nodes reconstruct the block using their local mempool data.
Transaction Compression:
Transactions within blocks are compressed using advanced algorithms, significantly reducing their size without losing any critical information.

3. Enhanced Peer-to-Peer (P2P) Network Topology
We’ve optimized the P2P network topology to improve reliability and performance:
Proximity-Aware Node Selection:
Nodes preferentially connect to peers based on network proximity, reducing latency by shortening the path length for data transmission.
Redundant Pathways:
Multiple redundant pathways are established between nodes, ensuring that even if one path fails, the data can still reach its destination through alternate routes.

Algorithms and Mathematical Formulas

1. Adaptive Gossip Rate Control Algorithm
The adaptive gossip rate control algorithm adjusts the propagation rate based on network load:
Rt=R0×(1−LtLmax)R_t = R_0 \times \left(1 - \frac{L_t}{L_{\text{max}}}\right)Rt​=R0​×(1−Lmax​Lt​​)
RtR_tRt​: Gossip rate at time ttt.
R0R_0R0​: Initial gossip rate.
LtL_tLt​: Current network load.
LmaxL_{\text{max}}Lmax​: Maximum allowable network load.
This formula ensures that as the network load increases, the gossip rate decreases, preventing congestion.

2. Compact Block Compression Algorithm
The compact block compression algorithm efficiently reduces block size:
Sc=Sb×(1−RdRmax)S_c = S_b \times \left(1 - \frac{R_d}{R_{\text{max}}}\right)Sc​=Sb​×(1−Rmax​Rd​​)
ScS_cSc​: Compressed block size.
SbS_bSb​: Original block size.
RdR_dRd​: Redundancy detected in transactions.
RmaxR_{\text{max}}Rmax​: Maximum redundancy.
By removing redundant transaction data, this algorithm achieves significant size reduction.

Impact on Network Performance

1. Latency Reduction
The new propagation techniques drastically reduce latency, ensuring that transactions and blocks reach all nodes much faster. This improvement enhances the user experience by providing quicker transaction confirmations.
2. Improved Scalability
Bandwidth-efficient propagation allows the network to handle more transactions and blocks without experiencing congestion. This scalability is crucial for supporting a growing number of users and transactions.
3. Enhanced Reliability
By establishing multiple redundant pathways and ensuring robust data compression, we’ve improved the overall reliability of the network. Nodes can recover from transmission errors more effectively, maintaining the integrity of the blockchain.


Our advancements in network propagation are a significant leap forward for the BlockDAG system. By implementing adaptive gossip protocols, compact block propagation, and optimized P2P network topology, we’ve made the network faster, more efficient, and more reliable. These enhancements are crucial for maintaining the high performance and scalability of the BlockDAG platform as it continues to grow and evolve.
Stay tuned for more updates, and feel free to join our community discussions to share your thoughts and feedback. Together, we’re pushing the boundaries of decentralized technology.

BlockDAG LogoBlockDAG Logo