Sei Giga Overview
Introduction
Sei Giga represents a high-performance blockchain platform designed to address the persistent challenges of the “blockchain trilemma”: the difficulty of simultaneously optimizing for security, decentralization, and performance. The platform combines current optimizations with upcoming architectural innovations to achieve exceptional performance while maintaining security guarantees and developer experience.
Current Architecture
Sei’s current system delivers significant performance improvements through three core components:
1. Twin Turbo Consensus
The current consensus mechanism achieves ~400ms block times through aggressive optimization of the Tendermint BFT consensus engine. Key features include:
- Pipelined block processing
- Optimistic transaction execution during consensus
- Aggressive timeout configurations
- Parallel transaction decoding and validation
Learn more about Twin Turbo Consensus →
2. Parallel Execution Engine
Sei implements Optimistic Concurrency Control (OCC) for parallel transaction execution:
- Multiple CPU cores process non-conflicting transactions simultaneously
- Automatic conflict detection and resolution
- Maintains deterministic execution order
- Compatible with standard EVM semantics
Learn more about the Parallelization Engine →
3. SeiDB Storage System
A specialized database optimized for blockchain workloads:
- Multi-level caching for hot state data
- Optimized Merkle Patricia Trie structure
- Concurrent state access controls
- Efficient state versioning and pruning
Upcoming Sei Giga Architecture
The next evolution of Sei Giga will introduce three key innovations designed to achieve target performance characteristics:
1. Asynchronous Execution Model (Upcoming)
A planned architectural enhancement will implement complete separation of consensus and execution. Unlike traditional blockchains where these processes are tightly coupled, the upcoming Sei Giga architecture will reach consensus solely on the ordering of transactions within a block, not the resulting state change.
This approach leverages the key property of deterministic execution:
Lemma 1 (Deterministic Execution): Given the same initial state () and the same ordered sequence of transactions (), all honest nodes executing these transactions will arrive at the exact same final state ().
Key benefits of this model:
- Non-blocking consensus: Heavy computational blocks don’t delay consensus
- Pipelined processing: Multiple blocks can be in different stages simultaneously
- Optimized resource usage: Consensus and execution use different hardware resources
2. Autobahn Consensus Protocol (Upcoming)
The upcoming Sei Giga will employ Autobahn, a Byzantine Fault Tolerant (BFT) consensus protocol designed for high performance blockchain networks. Unlike traditional single-proposer systems, Autobahn will enable multiple validators to propose blocks simultaneously, targeting significant throughput improvements while maintaining security guarantees.
Lane
Lane
Lane
The protocol operates through two complementary layers:
Data Dissemination Layer (Lanes):
- Each validator maintains an independent lane for proposing transaction batches
- Three-step certification process: Propose → Vote → Proof of Availability (PoA)
- Chained proposals ensure availability of historical data
Consensus Layer (Cut of Tips):
- Periodic ordering of latest certified tips from all lanes
- Two-phase BFT agreement with fast and slow paths
- Pipelined slots for minimal latency
3. Advanced Parallel Execution
The parallel execution architecture extends beyond current OCC capabilities to include:
Key innovations in the execution model:
- Flat encoding format: Length-prefixed layout for fast, zero-copy decoding
- Predictive conflict analysis: ML-based prediction of transaction dependencies
- Semantic understanding: Special handling for common patterns (ERC-20 transfers)
- Adaptive parallelism: Dynamic adjustment based on conflict rates
Storage Architecture Evolution
Beyond the current SeiDB capabilities, the Sei Giga architecture includes advanced storage innovations:
Performance Targets & Benchmarks
Target Specifications
The Sei Giga architecture targets the following performance characteristics:
Achieving 5 Gigagas
The path to 5 billion gas per second involves multiple optimizations working in concert:
- Consensus Optimization: Autobahn protocol eliminating consensus bottlenecks
- Execution Scaling: Full utilization of modern multi-core processors
- Storage Performance: Hybrid architecture minimizing I/O bottlenecks
- Network Efficiency: Optimized gossip protocols and data propagation
- Hardware Utilization: Leveraging specialized hardware (NVMe, RDMA)
Economic Model
Sei operates with a native SEI token that serves multiple functions within the ecosystem:
Token Distribution
- Total Supply: 10,000,000,000 (10 billion) SEI
- Initial Distribution: Allocated across ecosystem participants, validators, and development
Token Utility
- Gas Fees: All transactions require SEI for execution
- Staking: Validators and delegators stake SEI to secure the network
- Governance: SEI holders participate in protocol governance
- Rewards: Block rewards and fee distribution to validators
Staking Mechanics
Developer Experience
Sei maintains full EVM compatibility while providing enhanced capabilities:
Standard EVM Features
- Complete support for Solidity and Vyper
- Standard JSON-RPC endpoints
- Compatible with existing tools (Hardhat, Foundry, Remix)
- Familiar development workflow
Enhanced Capabilities
- Sub-second transaction finality
- Predictable gas costs
- High throughput for complex applications
- Advanced storage access patterns
Implementation Status
Learn More
Explore the technical components that make Sei’s performance possible: