DataHaven 🫎

An EVM-compatible Substrate blockchain secured by EigenLayer, bridging Ethereum and Substrate ecosystems through trustless cross-chain communication.

Overview

DataHaven is an EigenLayer Actively Validated Service (AVS) that combines:

• EVM Compatibility: Full Ethereum support via Frontier pallets for smart contracts and dApps
• EigenLayer Security: Validator set secured by Ethereum's economic security through restaking
• Cross-chain Bridge: Seamless asset and message transfers with Ethereum via Snowbridge
• Dynamic Validators: Operator registry managed on-chain through EigenLayer contracts
• Performance Rewards: Validator incentives distributed cross-chain from Ethereum

Architecture

DataHaven bridges two major blockchain ecosystems:

┌───────────────────────────────────────────────────────────────┐
│                       Ethereum (L1)                           │
│  ┌────────────────────────────────────────────────────────┐   │
│  │  EigenLayer AVS Contracts                              │   │
│  │  • DataHavenServiceManager (operator lifecycle)        │   │
│  │  • RewardsRegistry (performance tracking)              │   │
│  │  • VetoableSlasher (misbehavior penalties)             │   │
│  └────────────────────────────────────────────────────────┘   │
│                            ↕                                  │
│                  Snowbridge Protocol                          │
└───────────────────────────────────────────────────────────────┘
                             ↕
┌───────────────────────────────────────────────────────────────┐
│                    DataHaven (Substrate)                      │
│  ┌────────────────────────────────────────────────────────┐   │
│  │  Custom Pallets                                        │   │
│  │  • External Validators (sync validator set)            │   │
│  │  • Native Transfer (cross-chain tokens)                │   │
│  │  • Rewards (distribute validator rewards)              │   │
│  │  • Frontier (EVM compatibility)                        │   │
│  └────────────────────────────────────────────────────────┘   │
└───────────────────────────────────────────────────────────────┘

Repository Structure

datahaven/
├── contracts/      # EigenLayer AVS smart contracts
│   ├── src/       # Service Manager, Rewards Registry, Slasher
│   ├── script/    # Deployment scripts
│   └── test/      # Foundry test suites
├── operator/       # Substrate-based DataHaven node
│   ├── node/      # Node implementation & chain spec
│   ├── pallets/   # Custom pallets (validators, rewards, transfers)
│   └── runtime/   # Runtime configurations (mainnet/stagenet/testnet)
├── test/           # E2E testing framework
│   ├── suites/    # Integration test scenarios
│   ├── framework/ # Test utilities and helpers
│   └── launcher/  # Network deployment automation
├── deploy/         # Kubernetes deployment charts
│   ├── charts/    # Helm charts for nodes and relayers
│   └── environments/ # Environment-specific configurations
├── tools/          # GitHub automation and release scripts
└── .github/        # CI/CD workflows

Each directory contains its own README with detailed information. See:

• contracts/README.md - Smart contract development
• operator/README.md - Node building and runtime development
• test/README.md - E2E testing and network deployment
• deploy/README.md - Kubernetes deployment
• tools/README.md - Development tools

Quick Start

Prerequisites

• Kurtosis - Network orchestration
• Bun v1.3.2+ - TypeScript runtime
• Docker - Container management
• Foundry - Solidity toolkit
• Rust - For building the operator
• Helm - Kubernetes deployments (optional)
• Zig - For macOS cross-compilation (macOS only)

Launch Local Network

The fastest way to get started is with the interactive CLI:

cd test
bun i                    # Install dependencies
bun cli launch           # Interactive launcher with prompts

This deploys a complete environment including:

• Ethereum network: 2x EL clients (reth), 2x CL clients (lodestar)
• Block explorers: Blockscout (optional), Dora consensus explorer
• DataHaven node: Single validator with fast block times
• AVS contracts: Deployed and configured on Ethereum
• Snowbridge relayers: Bidirectional message passing

For more options and detailed instructions, see the test README.

Run Tests

cd test
bun test:e2e              # Run all integration tests
bun test:e2e:parallel     # Run with limited concurrency

NOTES: Adding the environment variable INJECT_CONTRACTS=true will inject the contracts when starting the tests to speed up setup.

Development Workflows

Smart Contract Development:

cd contracts
forge build               # Compile contracts
forge test                # Run contract tests

Node Development:

cd operator
cargo build --release --features fast-runtime
cargo test
./scripts/run-benchmarks.sh

After Making Changes:

cd test
bun generate:wagmi        # Regenerate contract bindings
bun generate:types        # Regenerate runtime types

Key Features

EVM Compatibility

Full Ethereum Virtual Machine support via Frontier pallets:

• Deploy Solidity smart contracts
• Use existing Ethereum tooling (MetaMask, Hardhat, etc.)
• Compatible with ERC-20, ERC-721, and other standards

EigenLayer Integration

Validator security anchored to Ethereum:

• Operators register via DataHavenServiceManager contract
• Economic security through ETH restaking
• Slashing protection with veto period via VetoableSlasher
• Performance-based rewards through RewardsRegistry

Cross-chain Communication

Trustless bridging via Snowbridge:

• Native token transfers between Ethereum ↔ DataHaven
• Cross-chain message passing
• Finality proofs via BEEFY consensus
• Three specialized relayers (beacon, BEEFY, execution)

Dynamic Validator Set

Validator management synchronized with Ethereum:

• EigenLayer operator registry as source of truth
• On-chain validator set updates via External Validators pallet
• Automatic consensus participation changes
• Cross-chain coordination for validator lifecycle

Docker Images

Production images published to DockerHub.

Build optimizations:

• sccache - Rust compilation caching
• cargo-chef - Dependency layer caching
• BuildKit cache mounts - External cache restoration

Build locally:

cd test
bun build:docker:operator    # Creates datahavenxyz/datahaven:local

Development Environment

VS Code Configuration

IDE configurations are excluded from version control for personalization, but these settings are recommended for optimal developer experience. Add to your .vscode/settings.json:

Rust Analyzer:

{
  "rust-analyzer.linkedProjects": ["./operator/Cargo.toml"],
  "rust-analyzer.cargo.allTargets": true,
  "rust-analyzer.procMacro.enable": false,
  "rust-analyzer.server.extraEnv": {
    "CARGO_TARGET_DIR": "target/.rust-analyzer",
    "SKIP_WASM_BUILD": 1
  },
  "rust-analyzer.diagnostics.disabled": ["unresolved-macro-call"],
  "rust-analyzer.cargo.buildScripts.enable": false
}

Optimizations:

• Links operator/ directory as the primary Rust project
• Disables proc macros and build scripts for faster analysis (Substrate macros are slow)
• Uses dedicated target directory to avoid conflicts
• Skips WASM builds during development

Solidity (Juan Blanco's extension):

{
  "solidity.formatter": "forge",
  "solidity.compileUsingRemoteVersion": "v0.8.28+commit.7893614a",
  "[solidity]": {
    "editor.defaultFormatter": "JuanBlanco.solidity"
  }
}

Note: Solidity version must match foundry.toml

TypeScript (Biome):

{
  "biome.lsp.bin": "test/node_modules/.bin/biome",
  "[typescript]": {
    "editor.defaultFormatter": "biomejs.biome",
    "editor.codeActionsOnSave": {
      "source.organizeImports.biome": "always"
    }
  }
}

CI/CD

Local CI Testing

Run GitHub Actions workflows locally using act:

# Run E2E workflow
act -W .github/workflows/e2e.yml -s GITHUB_TOKEN="$(gh auth token)"

# Run specific job
act -W .github/workflows/e2e.yml -j test-job-name

Automated Workflows

The repository includes GitHub Actions for:

• E2E Testing: Full integration tests on PR and main branch
• Contract Testing: Foundry test suites for smart contracts
• Rust Testing: Unit and integration tests for operator
• Docker Builds: Multi-platform image builds with caching
• Release Automation: Version tagging and changelog generation

See .github/workflows/ for workflow definitions.

Contributing

Development Cycle

1. Make Changes: Edit contracts, runtime, or tests
2. Run Tests: Component-specific tests (forge test, cargo test)
3. Regenerate Types: Update bindings if contracts/runtime changed
4. Integration Test: Run E2E tests to verify cross-component behavior
5. Code Quality: Format and lint (cargo fmt, forge fmt, bun fmt:fix)

Common Pitfalls

• Type mismatches: Regenerate with bun generate:types after runtime changes
• Contract changes not reflected: Run bun generate:wagmi after modifications
• Kurtosis issues: Ensure Docker is running and Kurtosis engine is started
• Slow development: Use --features fast-runtime for shorter epochs/eras (block time stays 6s)
• Network launch hangs: Check Blockscout - forge output can appear frozen

See CLAUDE.md for detailed development guidance.

License

GPL-3.0 - See LICENSE file for details

Links

• EigenLayer Documentation
• Substrate Documentation
• Snowbridge Documentation
• Foundry Book
• Polkadot-API Documentation