blockchain-runtime: Blockchain-Agnostic Testing and Simulation Framework

Today we're releasing blockchain-runtime, an open-source Rust library that provides a unified runtime abstraction for blockchain testing, simulation, and dynamic analysis across multiple chains.

Package: blockchain-runtime on crates.io
Repository: github.com/redasgard/blockchain-runtime
License: MIT
Version: 0.1.0
Downloads: 177+

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The Problem: Chain-Specific Testing Tools

When testing smart contracts or blockchain applications, developers face several challenges:

Fragmentation:

• Each blockchain has its own testing framework
• Ethereum uses Hardhat/Foundry
• Solana uses Anchor
• TON uses different tooling
• No unified approach across chains

Simulation Limitations:

• Hard to test cross-chain interactions
• Difficult to simulate realistic chain conditions
• Time-consuming to switch between environments
• Limited dynamic analysis capabilities

Security Testing Gaps:

• Static analysis misses runtime behavior
• Integration tests don't cover edge cases
• Fuzzing requires chain-specific setup
• Difficult to reproduce exploits

---

Solution: Chain-Agnostic Runtime Abstraction

blockchain-runtime provides a unified interface for:

1. Dynamic Contract Analysis

use blockchain_runtime::{Runtime, Chain};

// Works with any supported chain
let runtime = Runtime::new(Chain::Ethereum);

// Deploy and interact with contracts
let contract = runtime.deploy_contract(bytecode, constructor_args)?;
let result = runtime.call(contract, "transfer", args)?;

// Inspect state
let balance = runtime.get_storage(contract, slot)?;
let traces = runtime.get_execution_trace()?;

2. Multi-Chain Testing

use blockchain_runtime::{Runtime, Chain};

#[test]
fn test_cross_chain_bridge() {
    let eth = Runtime::new(Chain::Ethereum);
    let bsc = Runtime::new(Chain::BSC);
    
    // Test bridge logic on both chains
    let lock_tx = eth.execute_transaction(lock_tokens)?;
    let unlock_tx = bsc.execute_transaction(unlock_tokens)?;
    
    assert_eq!(eth.get_balance(user), 0);
    assert_eq!(bsc.get_balance(user), locked_amount);
}

3. Realistic Simulation

use blockchain_runtime::{Runtime, SimulationConfig};

let config = SimulationConfig {
    block_time: 12, // seconds
    gas_limit: 30_000_000,
    base_fee: 20_000_000_000, // wei
    timestamp: 1730000000,
};

let runtime = Runtime::with_config(Chain::Ethereum, config);

// Advance chain state
runtime.mine_blocks(100)?;
runtime.set_block_timestamp(future_time)?;

// Test time-dependent logic
let vested_amount = runtime.call(vesting_contract, "getVestedAmount", [])?;

---

Core Features

Supported Blockchains

Current (v0.1.0):

• Ethereum (EVM)
• BSC (EVM-compatible)
• Polygon (EVM-compatible)

Planned (v0.2.0):

• Solana
• TON
• Arbitrum/Optimism
• Cosmos chains

Runtime Capabilities

State Management:

• Account balance manipulation
• Storage slot access
• Block parameters control
• Timestamp manipulation

Transaction Execution:

• Contract deployment
• Function calls with ABI encoding
• Raw transaction execution
• Gas profiling

Debugging & Analysis:

• Execution traces
• Event log capture
• Revert reason extraction
• Gas usage breakdown

Simulation:

• Block mining
• Time travel
• State snapshots and rollback
• Fork from mainnet state

---

Technical Architecture

Abstraction Layers

???????????????????????????????????????
?     User API (Chain-Agnostic)       ?
???????????????????????????????????????
?   Runtime Abstraction Layer         ?
???????????????????????????????????????
?   Chain Adapters                    ?
?   ?? EVM Adapter                    ?
?   ?? Solana Adapter (planned)       ?
?   ?? TON Adapter (planned)          ?
???????????????????????????????????????
?   Execution Engines                 ?
?   ?? revm (Ethereum)                ?
?   ?? Solana SBF VM (planned)        ?
?   ?? TON VM (planned)               ?
???????????????????????????????????????

Design Principles

1. Zero-Copy Where Possible

• Efficient memory usage
• Minimal allocations
• Borrowed data by default

2. Type-Safe

• Strong typing for addresses, hashes, amounts
• Compile-time chain validation
• No runtime type errors

3. Extensible

• Plugin architecture for new chains
• Custom adapter registration
• Hook system for instrumentation

---

Real-World Usage

Security Testing

use blockchain_runtime::{Runtime, Chain};

#[test]
fn test_reentrancy_vulnerability() {
    let runtime = Runtime::new(Chain::Ethereum);
    
    // Deploy vulnerable contract
    let vulnerable = runtime.deploy(VULNERABLE_BYTECODE)?;
    
    // Deploy attacker contract
    let attacker = runtime.deploy(ATTACKER_BYTECODE)?;
    
    // Execute reentrancy attack
    let result = runtime.call(
        attacker,
        "attack",
        vec![vulnerable.address()]
    )?;
    
    // Verify exploit succeeded (for testing)
    let stolen = runtime.get_balance(attacker)?;
    assert!(stolen > 0, "Reentrancy exploit failed - contract may be secure");
}

Fuzzing Integration

use blockchain_runtime::Runtime;
use arbitrary::Arbitrary;

#[derive(Arbitrary, Debug)]
struct FuzzInput {
    amount: u64,
    recipient: [u8; 20],
    data: Vec<u8>,
}

fuzz_target!(|input: FuzzInput| {
    let runtime = Runtime::new(Chain::Ethereum);
    let contract = setup_contract(&runtime);
    
    // Fuzz contract calls
    let _ = runtime.call(
        contract,
        "process",
        vec![input.amount, input.recipient, input.data]
    );
    
    // Check invariants
    assert_balance_invariants(&runtime, contract);
});

Exploit Reproduction

use blockchain_runtime::{Runtime, Chain};

fn reproduce_balancer_exploit() -> Result<()> {
    let runtime = Runtime::fork_from_mainnet(
        Chain::Ethereum,
        21_xxx_xxx // Block before exploit
    )?;
    
    // Setup: Deploy contracts in same state
    let vault = runtime.get_contract(BALANCER_VAULT_ADDRESS)?;
    let attacker = runtime.create_account()?;
    
    // Reproduce exploit transaction
    let tx_data = hex::decode(EXPLOIT_CALLDATA)?;
    let result = runtime.send_transaction(
        attacker,
        vault.address(),
        0,
        tx_data
    )?;
    
    // Analyze what happened
    let trace = runtime.get_execution_trace()?;
    let stolen = runtime.get_balance_change(attacker)?;
    
    Ok(())
}

---

Installation & Quick Start

Add to Cargo.toml

[dependencies]
blockchain-runtime = "0.1"

# With optional tracing
blockchain-runtime = { version = "0.1", features = ["tracing"] }

# Dev dependencies for testing
[dev-dependencies]
blockchain-runtime = "0.1"

Quick Example

use blockchain_runtime::{Runtime, Chain};

fn main() -> Result<()> {
    // Create runtime
    let runtime = Runtime::new(Chain::Ethereum);
    
    // Create test accounts
    let deployer = runtime.create_account_with_balance(1_000_000)?;
    let user = runtime.create_account_with_balance(1_000)?;
    
    // Deploy contract
    let contract = runtime.deploy_from_file(
        "MyContract.sol",
        deployer
    )?;
    
    // Execute transaction
    let tx = runtime.transaction()
        .from(user)
        .to(contract.address())
        .function("myFunction", vec![42])
        .send()?;
    
    // Check result
    assert!(tx.success);
    println!("Gas used: {}", tx.gas_used);
    
    Ok(())
}

---

Use Cases

1. Smart Contract Auditing

Run dynamic analysis during security audits:

• Test edge cases not covered by unit tests
• Simulate attack scenarios
• Verify fix effectiveness
• Generate proof-of-concept exploits

2. Integration Testing

Test cross-contract and cross-chain interactions:

• Multi-contract test scenarios
• Bridge testing
• Oracle integration testing
• Complex DeFi flows

3. Research & Education

Study blockchain behavior:

• Analyze historical exploits
• Research new attack vectors
• Educational demonstrations
• Protocol comparison

4. Continuous Security

Integrate into CI/CD:

# .github/workflows/security.yml
- name: Run security tests
  run: cargo test --features blockchain-runtime

---

Performance

Optimized for test performance:

Operation	Time
Runtime initialization	~5ms
Contract deployment	~10ms
Simple call	~0.5ms
Complex call (100+ ops)	~15ms
Fork from mainnet	~200ms
Mine 1000 blocks	~100ms

Memory Usage:

• Base runtime: ~10MB
• Per contract: ~1-5MB
• Mainnet fork: ~500MB (depending on state size)

---

Comparison with Existing Tools

Feature	blockchain-runtime	Foundry	Hardhat	Ganache
Language	Rust	Solidity/Rust	JavaScript	JavaScript
Multi-chain	Yes (abstracted)	EVM only	EVM only	EVM only
Speed	Fast (~0.5ms/call)	Fast	Medium	Slow
Fork from mainnet	Yes	Yes	Yes	Yes
Type safety	Strong	Medium	Weak	Weak
Programmatic API	Yes	Limited	Yes	Yes

---

Roadmap

v0.2.0 (Q4 2025)

• Solana runtime support
• TON runtime support
• State diff visualization
• Performance profiling tools

v0.3.0 (Q1 2026)

• Layer 2 support (Arbitrum, Optimism, Base)
• Enhanced debugging (step-through execution)
• Symbolic execution integration
• Formal verification hooks

Future

• More chain adapters
• Cloud-based fork API
• Visual debugger
• IDE integration

---

Contributing

We welcome contributions!

Areas for contribution:

• New chain adapters
• Performance optimizations
• Additional test utilities
• Documentation improvements
• Example test suites

Get started:

git clone https://github.com/redasgard/blockchain-runtime
cd blockchain-runtime
cargo test

---

About Red Asgard

This library emerged from our security audit practice. When testing complex DeFi protocols, we needed better tools for dynamic analysis and exploit reproduction.

Our open-source ecosystem:

• llm-security - LLM prompt injection defense
• path-security - Path traversal protection
• quantum-shield - Post-quantum cryptography
• module-registry - Dynamic plugin system
• threat-intel - Threat intelligence framework

All MIT licensed and maintained by Red Asgard's security research team.

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Get Started

cargo add blockchain-runtime

Read the full documentation on GitHub.

For professional blockchain security audits, contact Red Asgard.

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Released: October 24, 2025
Version: 0.1.0
License: MIT