🧅 BOLT4 Onion Packet Builder
Construct and inspect Lightning onion packets step-by-step. Learn how payments are routed through multiple hops with privacy.
Session Setup
Hops
1. Key Derivation
Pad Key:
| Hop | Shared Secret | Rho (Obfuscation) | Mu (HMAC) |
|---|
2. Construction Steps
3. Final Output
0 bytes
4. Packet Structure
Learn More
This tool implements the BOLT4 specification for onion routing in Lightning.
Read BOLT4 Specification →