Class: IOTA::Crypto::Bundle

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bundle = []) ⇒ Bundle

Returns a new instance of Bundle.



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# File 'lib/iota/crypto/bundle.rb', line 6

def initialize(bundle = [])
  bundle = bundle.map do |b|
    if b.class != IOTA::Models::Transaction
      IOTA::Models::Transaction.new(b)
    else
      b
    end
  end

  @bundle = bundle
end

Instance Attribute Details

#bundle ⇒ Object (readonly)

Returns the value of attribute bundle.



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# File 'lib/iota/crypto/bundle.rb', line 4

def bundle
  @bundle
end

Instance Method Details

#addEntry(signatureMessageLength, address, value, tag, timestamp) ⇒ Object 



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# File 'lib/iota/crypto/bundle.rb', line 18

def addEntry(signatureMessageLength, address, value, tag, timestamp)
  (0...signatureMessageLength).step(1) do |i|
    transactionObject = IOTA::Models::Transaction.new(
      address: address,
      value: i==0 ? value : 0,
      obsoleteTag: tag,
      tag: tag,
      timestamp: timestamp
    )

    @bundle << transactionObject
  end
end

#addTrytes(signatureFragments) ⇒ Object 



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# File 'lib/iota/crypto/bundle.rb', line 32

def addTrytes(signatureFragments)
  emptySignatureFragment = ''
  emptyHash = '9' * 81
  emptyTag = '9' * 27
  emptyTimestamp = '9' * 9

  while emptySignatureFragment.length < 2187
    emptySignatureFragment += '9'
  end

  (0...@bundle.length).step(1) do |i|
    # Fill empty signatureMessageFragment
    @bundle[i].signatureMessageFragment = signatureFragments[i] ? signatureFragments[i] : emptySignatureFragment

    # Fill empty trunkTransaction
    @bundle[i].trunkTransaction = emptyHash

    # Fill empty branchTransaction
    @bundle[i].branchTransaction = emptyHash

    @bundle[i].attachmentTimestamp = emptyTimestamp
    @bundle[i].attachmentTimestampLowerBound = emptyTimestamp
    @bundle[i].attachmentTimestampUpperBound = emptyTimestamp

    # Fill empty nonce
    @bundle[i].nonce = emptyTag
  end
end

#finalize ⇒ Object 



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# File 'lib/iota/crypto/bundle.rb', line 61

def finalize
  validBundle = false

  while !validBundle

    kerl = Kerl.new

    (0...@bundle.length).step(1) do |i|
      valueTrits = Converter.trits(@bundle[i].value)
      while valueTrits.length < 81
        valueTrits << 0
      end

      timestampTrits = Converter.trits(@bundle[i].timestamp)
      while timestampTrits.length < 27
        timestampTrits << 0
      end

      @bundle[i].currentIndex = i
      currentIndexTrits = Converter.trits(@bundle[i].currentIndex)
      while currentIndexTrits.length < 27
        currentIndexTrits << 0
      end

      @bundle[i].lastIndex = @bundle.length - 1
      lastIndexTrits = Converter.trits(@bundle[i].lastIndex)
      while lastIndexTrits.length < 27
        lastIndexTrits << 0
      end

      bundleEssence = Converter.trits(@bundle[i].address + Converter.trytes(valueTrits) + @bundle[i].obsoleteTag + Converter.trytes(timestampTrits) + Converter.trytes(currentIndexTrits) + Converter.trytes(lastIndexTrits))
      kerl.absorb(bundleEssence, 0, bundleEssence.length)
    end

    hash = []
    kerl.squeeze(hash, 0, Kerl::HASH_LENGTH)
    hash = Converter.trytes(hash)

    (0...@bundle.length).step(1) do |i|
      @bundle[i].bundle = hash
    end

    normalizedHash = normalizedBundle(hash)
    if !normalizedHash.index(13).nil?
      # Insecure bundle. Increment Tag and recompute bundle hash.
      increasedTagTrits = Converter.trits(@bundle[0].obsoleteTag)

      # Adder implementation with 1 round
      (0...increasedTagTrits.length).step(1) do |j|
        increasedTagTrits[j] += 1

        if increasedTagTrits[j] > 1
          increasedTagTrits[j] = -1
        else
          break
        end
      end

      @bundle[0].obsoleteTag = Converter.trytes(increasedTagTrits)
    else
      validBundle = true
    end
  end
end

#normalizedBundle(bundleHash) ⇒ Object 



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# File 'lib/iota/crypto/bundle.rb', line 126

def normalizedBundle(bundleHash)
  normalizedBundleArr = []

  (0...3).step(1) do |i|
    sum = 0
    (0...27).step(1) do |j|
      normalizedBundleArr[i * 27 + j] = Converter.value(Converter.trits(bundleHash[i * 27 + j]))
      sum += normalizedBundleArr[i * 27 + j]
    end

    if sum >= 0
      while sum > 0
        sum -= 1
        (0...27).step(1) do |j|
          if normalizedBundleArr[i * 27 + j] > -13
            normalizedBundleArr[i * 27 + j] -= 1
            break
          end
        end
      end
    else
      while sum < 0
        sum += 1
        (0...27).step(1) do |j|
          if normalizedBundleArr[i * 27 + j] < 13
            normalizedBundleArr[i * 27 + j] += 1
            break
          end
        end
      end
    end
  end

  normalizedBundleArr
end