Last Updated: October 2025

This document tracks the security implementation status of SolBolt's payment channel protocol.

• Channel creation and initialization
• Off-chain voucher generation
• Cryptographic signature creation
• Basic cooperative closure
• SDK integration

• On-chain nonce verification
• Ed25519 signature verification
• Dispute resolution mechanism
• Timeout protection
• Challenge period implementation

• Revocable commitments
• Penalty mechanisms
• Watchtower protocol
• Multi-signature support
• Emergency shutdown procedures

Status: In Development
Priority: Critical

Current implementation:

• Off-chain nonce tracking
• Client-side state validation

Planned improvements:

• On-chain nonce storage and verification
• Reject stale state submissions
• Monotonic nonce enforcement

// Planned implementation
pub struct PaymentChannel {
    pub nonce: u64,  // Stored on-chain
    // ...
}

pub fn close_channel(..., nonce: u64, ...) -> Result<()> {
    require!(nonce >= ctx.accounts.channel.nonce, ErrorCode::StaleState);
    // ...
}

Status: In Development
Priority: Critical

Current implementation:

• Client-side Ed25519 signing
• Signature collection in vouchers

Planned improvements:

• On-chain signature verification using Solana's Ed25519 program
• Message reconstruction and validation
• Public key matching

// Planned implementation
use solana_program::ed25519_program;

pub fn close_channel(...) -> Result<()> {
    verify_signature(signature_a, party_a, message)?;
    verify_signature(signature_b, party_b, message)?;
    // ...
}

Status: Planned
Priority: High

Planned implementation:

• Challenge period for contested closures
• Submit newer state during dispute
• Automatic resolution after timeout

// Planned state machine
pub enum ChannelState {
    Open,
    CloseInitiated,
    Challenged,
    Finalized,
}

Status: Planned
Priority: High

Planned implementation:

• Configurable timeout period
• Unilateral closure after timeout
• Protection against offline counterparty

// Planned timeout structure
pub struct PaymentChannel {
    pub timeout: i64,
    pub last_update: i64,
    // ...
}

• Unit tests for smart contract
• SDK integration tests
• Attack scenario simulations
• Fuzzing tests
• Load testing
• Security audit

Planned test coverage:

• Replay attack prevention
• Signature forgery attempts
• Race condition handling
• Timeout abuse scenarios
• Network partition cases

• Implement core security features
• Internal security review
• Community testing on testnet

• Professional security audit by reputable firm
• Bug bounty program
• Vulnerability disclosure process

• Address audit findings
• Implement recommended improvements
• Final review and mainnet preparation

Current recommendations:

• Test on devnet/testnet only
• Use small amounts during testing
• Monitor channel states actively
• Keep backup of signed vouchers

Before mainnet:

• Review audit report
• Understand protocol risks
• Use appropriate fund limits
• Implement monitoring

Integration guidelines:

• Validate all inputs
• Handle errors gracefully
• Implement retry logic
• Store vouchers securely
• Monitor channel health

• Requires both parties online for updates
• No multi-hop routing (single channel only)
• Limited to bilateral channels
• No automatic rebalancing

• Manual voucher backup
• Active monitoring needed
• No automated dispute resolution
• Manual intervention for edge cases

Found a security issue? Contact us:

• Email: security@solbolt.dev
• GitHub: Private security advisories
• Response time: 48 hours for critical issues

Please provide:

• Detailed description
• Reproduction steps
• Potential impact
• Suggested fix (if any)

We follow responsible disclosure practices:

• 90-day disclosure timeline
• Coordinated public disclosure
• Security credits for researchers
• Bug bounty rewards for critical findings

• Solana Security Best Practices
• Anchor Security Guidelines
• Lightning Network Security

• Anchor's built-in security checks
• Solana program verification
• Signature verification libraries

Security is a continuous process. This document will be updated as features are implemented and audited.