Class: Lightning::Onion::Packet

Inherits:
Object
  • Object
show all
Includes:
Sphinx
Defined in:
lib/lightning/onion/packet.rb

Constant Summary

Constants included from Sphinx

Sphinx::ERROR_PACKET_LENGTH, Sphinx::HOP_LENGTH, Sphinx::LAST_PACKET, Sphinx::MAC_LENGTH, Sphinx::MAX_ERROR_PAYLOAD_LENGTH, Sphinx::MAX_HOPS, Sphinx::PACKET_LENGTH, Sphinx::PAYLOAD_LENGTH, Sphinx::PUBKEY_LENGTH, Sphinx::VERSION

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Sphinx

check_mac, compute_blinding_factor, compute_keys_and_secrets, compute_shared_secret, extract_failure_message, forward_error_packet, generate_cipher_stream, generate_filler, generate_key, hmac256, internal_compute_keys_and_secrets, internal_make_packet, internal_parse_error, mac, make_blind, make_blinds, make_error_packet, make_next_packet, make_packet, parse_error, xor

Constructor Details

#initialize(version, public_key, routing_info, hmac) ⇒ Packet

Returns a new instance of Packet.



10
11
12
13
14
15
16
 
# File 'lib/lightning/onion/packet.rb', line 10

def initialize(version, public_key, routing_info, hmac)
  @version = version
  @public_key = public_key
  @routing_info = routing_info
  raise "invalid size #{routing_info.size}" unless routing_info.size == MAX_HOPS * HOP_LENGTH * 2
  @hmac = hmac
end

Instance Attribute Details

#hmac ⇒ Object

Returns the value of attribute hmac.



8
9
10
 
# File 'lib/lightning/onion/packet.rb', line 8

def hmac
  @hmac
end

#public_key ⇒ Object

Returns the value of attribute public_key.



8
9
10
 
# File 'lib/lightning/onion/packet.rb', line 8

def public_key
  @public_key
end

#routing_info ⇒ Object

Returns the value of attribute routing_info.



8
9
10
 
# File 'lib/lightning/onion/packet.rb', line 8

def routing_info
  @routing_info
end

#version ⇒ Object

Returns the value of attribute version.



8
9
10
 
# File 'lib/lightning/onion/packet.rb', line 8

def version
  @version
end

Class Method Details

.parse(payload) ⇒ Object 



18
19
20
21
22
23
 
# File 'lib/lightning/onion/packet.rb', line 18

def self.parse(payload)
  version, public_key, rest = payload.unpack('aH66a*')
  routing_info = rest[0...MAX_HOPS * HOP_LENGTH].bth
  hmac = rest[MAX_HOPS * HOP_LENGTH..-1].bth
  new(version, public_key, routing_info, hmac)
end

Instance Method Details

#to_payload ⇒ Object 



25
26
27
28
29
30
31
 
# File 'lib/lightning/onion/packet.rb', line 25

def to_payload
  payload = +''
  payload << [version, public_key].pack('aH66')
  payload << routing_info.htb
  payload << hmac.htb
  payload
end