BlockDAG

Traditional blockchains struggle with scalability and efficiency. BlockDAG—a Directed Acyclic Graph architecture—processes many blocks in parallel, forming a web rather than a single chain.


Taraxa, an EVM-compatible Layer-1, uses BlockDAG with Proof of Stake (PoS) to achieve high-speed, low-cost transactions while staying decentralized and secure. Its t-Graph consensus pairs BlockDAG with an anchor chain and asynchronous PBFT to handle thousands of transactions per second in an energy-efficient way.

The Fundamentals of BlockDAG

Unlike linear chains, BlockDAG lets each block reference multiple predecessors, allowing simultaneous validation and eliminating forks. Taraxa’s Proof of Stake model selects validators by staked TARA tokens, keeping participation broad and energy use low. Security also improves: attackers must compromise multiple branches, making 51% attacks far harder and enabling advanced scaling features like fuzzy sharding.

Taraxa’s t-Graph Consensus: Proof of Stake Meets BlockDAG

t-Graph merges PoS and BlockDAG for massive scalability without centralization. Any staked participant can propose blocks in parallel, and a GHOST-style protocol orders transactions by accumulated support. EVM compatibility means Ethereum tools and dApps run smoothly with sub-second confirmations and minimal fees, while dynamic proposal rates adjust to network load.

The Anchor Chain: Ensuring Secure and Fair Ordering

Taraxa’s Anchor Chain adds a linear backbone to the DAG, linking “anchor blocks” that lock in a single transaction history. Weighted voting picks the heaviest subgraph, preventing reordering attacks and ensuring reliable smart-contract execution. Randomized validator selection and stake weighting keep participation fair and convergence fast—ideal for DeFi or AI-driven apps needing consistent ordering.

Achieving True Finality with Asynchronous PBFT

Taraxa enhances probabilistic finality with asynchronous PBFT for deterministic, irreversible blocks. Validators vote on “period blocks,” finalizing them without slowing the DAG. This hybrid approach strengthens security and suits enterprise uses like supply-chain tracking, while keeping costs low and performance high.