Class: Lightning::Invoice::Message

Inherits:
Object
  • Object
show all
Defined in:
lib/lightning/invoice.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Message

Returns a new instance of Message.



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# File 'lib/lightning/invoice.rb', line 17

def initialize
  @routing_info = []
end

Instance Attribute Details

#amount ⇒ Object

Returns the value of attribute amount.



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# File 'lib/lightning/invoice.rb', line 14

def amount
  @amount
end

#description ⇒ Object

Returns the value of attribute description.



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# File 'lib/lightning/invoice.rb', line 15

def description
  @description
end

#description_hash ⇒ Object

Returns the value of attribute description_hash.



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# File 'lib/lightning/invoice.rb', line 15

def description_hash
  @description_hash
end

#expiry ⇒ Object

Returns the value of attribute expiry.



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# File 'lib/lightning/invoice.rb', line 15

def expiry
  @expiry
end

#fallback_address ⇒ Object

Returns the value of attribute fallback_address.



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# File 'lib/lightning/invoice.rb', line 15

def fallback_address
  @fallback_address
end

#min_final_cltv_expiry ⇒ Object

Returns the value of attribute min_final_cltv_expiry.



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# File 'lib/lightning/invoice.rb', line 15

def min_final_cltv_expiry
  @min_final_cltv_expiry
end

#multiplier ⇒ Object

Returns the value of attribute multiplier.



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# File 'lib/lightning/invoice.rb', line 14

def multiplier
  @multiplier
end

#payment_hash ⇒ Object

Returns the value of attribute payment_hash.



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# File 'lib/lightning/invoice.rb', line 15

def payment_hash
  @payment_hash
end

#prefix ⇒ Object

Returns the value of attribute prefix.



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# File 'lib/lightning/invoice.rb', line 14

def prefix
  @prefix
end

#pubkey ⇒ Object

Returns the value of attribute pubkey.



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# File 'lib/lightning/invoice.rb', line 15

def pubkey
  @pubkey
end

#routing_info ⇒ Object

Returns the value of attribute routing_info.



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# File 'lib/lightning/invoice.rb', line 15

def routing_info
  @routing_info
end

#signature ⇒ Object

Returns the value of attribute signature.



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# File 'lib/lightning/invoice.rb', line 15

def signature
  @signature
end

#timestamp ⇒ Object

Returns the value of attribute timestamp.



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# File 'lib/lightning/invoice.rb', line 15

def timestamp
  @timestamp
end

Instance Method Details

#fallback_address_type(fallback_address) ⇒ Object 



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# File 'lib/lightning/invoice.rb', line 91

def fallback_address_type(fallback_address)
  address_types = {
    'lnbc' => [0, 5],
    'lntb' => [111, 196]
  }

  hrp, data = Bech32.decode(fallback_address)
  if hrp
    0
  else
    decoded = [Bitcoin::Base58.decode(fallback_address)].pack("H*").unpack("C*")
    if decoded[0] == address_types[prefix][0]
      17
    elsif decoded[0] == address_types[prefix][1]
      18
    end
  end
end

#to_bech32 ⇒ Object 



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# File 'lib/lightning/invoice.rb', line 21

def to_bech32
  human = +''
  human << prefix
  human << amount.to_s if amount && amount > 0
  human << multiplier if multiplier
  data = []
  data += Invoice.int_to_array(timestamp)
  if payment_hash && !payment_hash.empty?
    data += [1]
    data += [1, 20]
    data += Invoice.buffer_to_word(payment_hash.htb)
  end
  if description && !description.empty?
    data += [13]
    description_word = Invoice.buffer_to_word(description)
    data += Invoice.int_to_array(description_word.size)
    data += description_word
  end
  if pubkey && !pubkey.empty?
    data += [19]
    data += [1, 21]
    data += Invoice.buffer_to_word(pubkey.htb)
  end
  if description_hash && !description_hash.empty?
    data += [23]
    data += [1, 20]
    data += Invoice.buffer_to_word(description_hash.htb)
  end
  if expiry
    data += [6]
    expiry_word = Invoice.int_to_array(expiry)
    data += Invoice.int_to_array(expiry_word.size)
    data += expiry_word
  end
  if min_final_cltv_expiry
    data += [24]
    min_final_cltv_expiry_word = Invoice.int_to_array(min_final_cltv_expiry)
    data += Invoice.int_to_array(min_final_cltv_expiry_word.size)
    data += min_final_cltv_expiry_word
  end
  if fallback_address && !fallback_address.empty?
    data += [9]
    type = fallback_address_type(fallback_address)
    case type
    when 0
      _, data_part = Bech32.decode(fallback_address)
      data += Invoice.int_to_array(data_part.size)
      data += data_part
    when 17, 18
      decoded = Bitcoin::Base58.decode(fallback_address)
      decoded = decoded.htb[1...-4]
      decoded = Invoice.buffer_to_word(decoded)
      data += Invoice.int_to_array(decoded.size + 1)
      data << type
      data += decoded
    end
  end
  if routing_info && !routing_info.empty?
    data += [3]
    data += Invoice.int_to_array(82 * routing_info.size)
    tmp = []
    routing_info.each do |r|
      tmp += r.to_array
    end
    data += Invoice.buffer_to_word(tmp.pack("C*"))
  end
  data += Invoice.buffer_to_word(signature.htb)
  Bech32.encode(human, data)
end