Decentralized block building protocol for Solana — reduces transaction latency from 300–500 ms to 50–100 ms and eliminates MEV through app-controlled execution order.

Live Demo · Video Walkthrough · Docs · Colosseum Submission

• Problem: RPC → TPU → Banking Stage causes 300–500 ms delay, resulting in missed arbitrage and failed liquidations.
• BBM: Direct Trader → BBM with pre-simulation cuts latency to 50–100 ms.

• Problem: Validators fill blocks only 70–80%, wasting compute units on conflicting transactions.
• BBM: Parallel processing, conflict resolution, and optimized bundles push utilization above 95%.

• Problem: Solana lacks native conditional execution and bundle privacy.
• BBM: Adds conditional and atomic bundles with concealed content.

• Problem: Validators dictate transaction order, enabling MEV extraction at users' expense.
• BBM: Lets apps define their own auction logic and enforce fair ordering.

• Speed — 400 ms block time is the foundation for our 50–100 ms latency target; no other L1 makes this feasible
• Cost — $0.00025 per transaction makes high-frequency bundle submission economically viable
• Ecosystem — Deep DeFi liquidity on Jupiter, Raydium, and Orca creates real, immediate demand for better block building
• Composability — Anchor's CPI allows BBM to integrate with any existing Solana protocol without forks or migrations

• Direct trader → BBM submission (bypasses standard RPC path)
• Pre-simulation engine with conflict detection
• Parallel transaction processing and bundle optimization
• Conditional and atomic bundle support
• App-defined auction logic
• Fair ordering mechanism
• Geyser plugin for real-time block state monitoring

┌─────────────┐     ┌──────────────────────┐     ┌──────────────────┐
│  Trader /   │────▶│     BBM Relay        │────▶│ Validator Node   │
│  Protocol   │     │  ┌────────────────┐  │     │ (Banking Stage)  │
└─────────────┘     │  │ Pre-Simulation │  │     └──────────────────┘
                    │  └───────┬────────┘  │
                    │  ┌───────▼────────┐  │
                    │  │   Conflict     │  │
                    │  │   Resolver     │  │
                    │  └───────┬────────┘  │
                    │  ┌───────▼────────┐  │
                    │  │    Bundle      │  │
                    │  │   Optimizer    │  │
                    │  └────────────────┘  │
                    └──────────────────────┘

See docs/architecture.md for full component breakdown.

Prerequisites: Node.js 18+, Rust, Anchor CLI, Solana CLI

# Clone the repository
git clone https://github.com/Marakaya/colosseum_example
cd colosseum_example

# Install dependencies
npm install

# Copy environment variables
cp .env.example .env

# Build Solana programs
anchor build

# Run tests
anchor test

# Start frontend
cd frontend && npm run dev

• Core bundle submission protocol
• Pre-simulation engine
• Conflict resolution
• Mainnet deployment
• App-defined auction logic SDK
• Multi-validator support
• Privacy layer (ZK bundles)

Full roadmap: docs/roadmap.md

• Project Presentation
• Video Demo
• Live Application
• X / Twitter

MIT — see LICENSE