Class: IOTA::Models::Bundle

Inherits:
Base
  • Object
show all
Defined in:
lib/iota/models/bundle.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(transactions) ⇒ Bundle

Returns a new instance of Bundle.



6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# File 'lib/iota/models/bundle.rb', line 6

def initialize(transactions)
  if transactions.class != Array
    raise StandardError, "Invalid transactions array"
  end

  @transactions = []
  transactions.each do |trx|
    trx = Transaction.new(trx) if trx.class != IOTA::Models::Transaction
    @transactions << trx
  end

  @persistence = @transactions.first.persistence
  @attachmentTimestamp = @transactions.first.attachmentTimestamp
end

Instance Attribute Details

#attachmentTimestamp ⇒ Object (readonly)

Returns the value of attribute attachmentTimestamp.



4
5
6
 
# File 'lib/iota/models/bundle.rb', line 4

def attachmentTimestamp
  @attachmentTimestamp
end

#persistence ⇒ Object (readonly)

Returns the value of attribute persistence.



4
5
6
 
# File 'lib/iota/models/bundle.rb', line 4

def persistence
  @persistence
end

#transactions ⇒ Object (readonly)

Returns the value of attribute transactions.



4
5
6
 
# File 'lib/iota/models/bundle.rb', line 4

def transactions
  @transactions
end

Instance Method Details

#extractJSON ⇒ Object 



21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'lib/iota/models/bundle.rb', line 21

def extractJSON
  utils = IOTA::Utils::Utils.new

  # Sanity check: if the first tryte pair is not opening bracket, it's not a message
  firstTrytePair = transactions[0].signatureMessageFragment[0] + transactions[0].signatureMessageFragment[1]

  return nil if firstTrytePair != "OD"

  index = 0
  notEnded = true
  trytesChunk = ''
  trytesChecked = 0
  preliminaryStop = false
  finalJson = ''

  while index < transactions.length && notEnded
    messageChunk = transactions[index].signatureMessageFragment

    # We iterate over the message chunk, reading 9 trytes at a time
    (0...messageChunk.length).step(9) do |i|
      # get 9 trytes
      trytes = messageChunk.slice(i, 9)
      trytesChunk += trytes

      # Get the upper limit of the tytes that need to be checked
      # because we only check 2 trytes at a time, there is sometimes a leftover
      upperLimit = trytesChunk.length - trytesChunk.length % 2

      trytesToCheck = trytesChunk[trytesChecked...upperLimit]

      # We read 2 trytes at a time and check if it equals the closing bracket character
      (0...trytesToCheck.length).step(2) do |j|
        trytePair = trytesToCheck[j] + trytesToCheck[j + 1]

        # If closing bracket char was found, and there are only trailing 9's
        # we quit and remove the 9's from the trytesChunk.
        if preliminaryStop && trytePair == '99'
          notEnded = false
          break
        end

        finalJson += utils.fromTrytes(trytePair)

        # If tryte pair equals closing bracket char, we set a preliminary stop
        # the preliminaryStop is useful when we have a nested JSON object
        if trytePair === "QD"
          preliminaryStop = true
        end
      end

      break if !notEnded

      trytesChecked += trytesToCheck.length;
    end

    # If we have not reached the end of the message yet, we continue with the next transaction in the bundle
    index += 1
  end

  # If we did not find any JSON, return nil
  return nil if notEnded

  finalJson
end