Class: IOTA::Models::Account

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client, seed, api = nil, validator = nil, utils = nil) ⇒ Account

Returns a new instance of Account.



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# File 'lib/iota/models/account.rb', line 6

def initialize(client, seed, api = nil, validator = nil, utils = nil)
  @api = client ? client.api : api
  @validator = client ? client.validator : validator
  @utils = client ? client.utils : utils
  @seed = seed.class == String ? Seed.new(seed) : seed

  reset
end

Instance Attribute Details

#addresses ⇒ Object (readonly)

Returns the value of attribute addresses.



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# File 'lib/iota/models/account.rb', line 4

def addresses
  @addresses
end

#balance ⇒ Object (readonly)

Returns the value of attribute balance.



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# File 'lib/iota/models/account.rb', line 4

def balance
  @balance
end

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'lib/iota/models/account.rb', line 4

def client
  @client
end

#inputs ⇒ Object (readonly)

Returns the value of attribute inputs.



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# File 'lib/iota/models/account.rb', line 4

def inputs
  @inputs
end

#latestAddress ⇒ Object (readonly)

Returns the value of attribute latestAddress.



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# File 'lib/iota/models/account.rb', line 4

def latestAddress
  @latestAddress
end

#seed ⇒ Object (readonly)

Returns the value of attribute seed.



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# File 'lib/iota/models/account.rb', line 4

def seed
  @seed
end

#transfers ⇒ Object (readonly)

Returns the value of attribute transfers.



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# File 'lib/iota/models/account.rb', line 4

def transfers
  @transfers
end

Instance Method Details

#getAccountDetails(options = {}, fetchInputs = true, fetchTransfers = true) ⇒ Object 



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# File 'lib/iota/models/account.rb', line 23

def getAccountDetails(options = {}, fetchInputs = true, fetchTransfers = true)
  reset
  options = symbolize_keys(options)
  startIndex = options[:start] || 0
  endIndex = options[:end] || nil
  security = options[:security] || 2

  # If start value bigger than end, return error or if difference between end and start is bigger than 1000 keys
  if endIndex && (startIndex > endIndex || endIndex > (startIndex + 1000))
    raise StandardError, "Invalid inputs provided"
  end

  addressOptions = {
    index: startIndex,
    total: endIndex ? endIndex - startIndex : nil,
    returnAll: true,
    security: security,
    checksum: true
  }

  # Get a list of all addresses associated with the users seed
  addresses = getNewAddress(addressOptions)

  # assign the last address as the latest address
  # since it has no transactions associated with it
  @latestAddress = addresses.last

  # Add all returned addresses to the lsit of addresses
  # remove the last element as that is the most recent address
  @addresses = addresses.slice(0, addresses.length)

  if fetchInputs
    # Get the correct balance count of all addresses
    @api.getBalances(addresses, 100) do |status2, balancesData|
      if !status2
        raise StandardError, balancesData
      end

      balancesData.each_with_index do |balance, index|
        balance = balance.to_i
        @balance += balance

        if balance > 0
          @inputs << IOTA::Models::Input.new(
            address: @addresses[index],
            keyIndex: index,
            security: security,
            balance: balance
          )
        end
      end
    end
  end

  if fetchTransfers
    # get all bundles from a list of addresses
    @api.bundlesFromAddresses(addresses, true) do |status1, bundlesData|
      if !status1
        raise StandardError, bundlesData
      end

      # add all transfers
      @transfers = bundlesData
    end
  end

  self
end

#getInputs(options = {}) ⇒ Object 



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# File 'lib/iota/models/account.rb', line 92

def getInputs(options = {})
  self.getAccountDetails(options, true, false)
  @inputs
end

#getNewAddress(options = {}) ⇒ Object 



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# File 'lib/iota/models/account.rb', line 276

def getNewAddress(options = {})
  # default index value
  options = symbolize_keys(options)
  index = options[:index] || 0

  # validate the index option
  if !@validator.isValue(index) || index < 0
    raise StandardError, "Invalid index provided: #{index}"
  end

  checksum = options[:checksum] || false
  total = options[:total] || nil
  return_all = options[:returnAll] || false

  # If no user defined security, use the standard value of 2
  security = options[:security] || 2

  # validate the security option
  if !@validator.isValue(security) || security < 1 || security > 3
    raise StandardError, "Invalid security provided: #{index}"
  end

  allAddresses = []

  # Case 1: total
  #
  # If total number of addresses to generate is supplied, simply generate
  # and return the list of all addresses
  if total
      # Increase index with each iteration
      (0...total).step(1) do |i|
        address = @seed.getAddress(index, security, checksum)
        allAddresses << address
        index += 1
      end

      return allAddresses
  else
    #  Case 2: no total provided
    #
    # Continue calling findTransactions to see if address was already created
    #  if null, return list of addresses
    loop do
      newAddress = @seed.getAddress(index, security, checksum)

      @api.wereAddressesSpentFrom([newAddress]) do |status, spent_states|
        if !status
          raise StandardError, spent_states
        end

        spent = spent_states[0]

        # Check transactions if not spent
        if !spent
          @api.findTransactions(addresses: [newAddress]) do |status, trx_hashes|
            if !status
              raise StandardError, trx_hashes
            end

            spent = trx_hashes.length > 0
          end
        end

        if return_all
          allAddresses << newAddress
        end

        index += 1
        return (return_all ? allAddresses : newAddress) if !spent
      end
    end
  end
end

#getTransfers(options = {}) ⇒ Object 



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# File 'lib/iota/models/account.rb', line 97

def getTransfers(options = {})
  self.getAccountDetails(options, false, true)
  @transfers
end

#prepareTransfers(transfers, options = {}) ⇒ Object

Raises:

  • (StandardError) 


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# File 'lib/iota/models/account.rb', line 102

def prepareTransfers(transfers, options = {})
  options = symbolize_keys(options)
  hmacKey = options[:hmacKey] || nil
  if !hmacKey.nil?
    raise StandardError, "Invalid trytes provided: #{hmacKey}" if !@validator.isTrytes(hmacKey)
  end

  # If message or tag is not supplied, provide it
  # Also remove the checksum of the address if it's there after validating it
  (0...transfers.length).step(1) do |index|
    if transfers[index].class != IOTA::Models::Transfer
      transfers[index] = IOTA::Models::Transfer.new(transfers[index].merge({ hmacKey: hmacKey }))
    end
  end

  # Input validation of transfers object
  raise StandardError, "Invalid transfers provided" if !@validator.isTransfersArray(transfers)

  # If inputs provided, validate the format
  chosenInputs = options[:inputs] || nil
  raise StandardError, "Invalid inputs provided" if chosenInputs && !@validator.isInputs(chosenInputs)

  remainderAddress = options[:address] || nil
  chosenInputs = chosenInputs || []
  security = options[:security] || 2

  remainderAddress = @utils.noChecksum(remainderAddress) if remainderAddress && remainderAddress.length == 90

  # Create a new bundle
  bundle = IOTA::Crypto::Bundle.new

  totalValue = 0
  signatureFragments = []
  tag = nil

  # Iterate over all transfers, get totalValue and prepare the signatureFragments, message and tag
  (0...transfers.length).step(1) do |i|
    signatureMessageLength = 1

    # If message longer than 2187 trytes, increase signatureMessageLength (add 2nd transaction)
    if transfers[i].message.length > 2187
      # Get total length, message / maxLength (2187 trytes)
      signatureMessageLength += (transfers[i].message.length / 2187).floor
      msgCopy = transfers[i].message

      # While there is still a message, copy it
      while msgCopy
        fragment = msgCopy[0...2187]
        msgCopy = msgCopy[2187...msgCopy.length]

        # Pad remainder of fragment
        while fragment.length < 2187
          fragment += '9'
        end

        signatureFragments << fragment
      end
    else
      # Else, get single fragment with 2187 of 9's trytes
      fragment = ''

      fragment = transfers[i].message[0...2187] if transfers[i].message

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

      signatureFragments << fragment
    end

    # get current timestamp in seconds
    timestamp = Time.now.utc.to_i

    # If no tag defined, get 27 tryte tag.
    tag = transfers[i].obsoleteTag || ''

    # Pad for required 27 tryte length
    while tag.length < 27
      tag += '9'
    end

    # Add first entries to the bundle
    # Slice the address in case the user provided a checksummed one
    bundle.addEntry(signatureMessageLength, transfers[i].address, transfers[i].value, tag, timestamp)
    # Sum up total value
    totalValue += transfers[i].value.to_i
  end

  # Get inputs if we are sending tokens
  if totalValue > 0
    #  Case 1: user provided inputs
    #
    #  Validate the inputs by calling getBalances
    if chosenInputs && chosenInputs.length > 0
      # Get list if addresses of the provided inputs
      inputsAddresses = [];
      (0...chosenInputs.length).step(1) do |i|
        if chosenInputs[i].class != IOTA::Models::Input
          chosenInputs[i] = IOTA::Models::Input.new(chosenInputs[i])
        end
        inputsAddresses << chosenInputs[i].address
      end

      @api.getBalances(inputsAddresses, 100) do |status, balances|
        raise StandardError, balances if !status

        confirmedInputs = []
        totalBalance = 0

        balances.each_with_index do |balance, i|
          # If input has balance, add it to confirmedInputs
          balance = balance.to_i

          if balance > 0
            totalBalance += balance

            input = chosenInputs[i]
            input.balance = balance

            confirmedInputs << input

            # if we've already reached the intended input value, break out of loop
            if totalBalance >= totalValue
              break
            end
          end
        end

        # Return not enough balance error
        raise StandardError, "Not enough balance" if totalValue > totalBalance

        return addRemainder(confirmedInputs, totalValue, bundle, tag, security, signatureFragments, remainderAddress, hmacKey)
      end
    else
      # Case 2: Get inputs deterministically
      # If no inputs provided, derive the addresses from the seed and
      # confirm that the inputs exceed the threshold
      self.getInputs(security: security)

      raise StandardError, "Not enough balance" if totalValue > @balance

      return addRemainder(@inputs, totalValue, bundle, tag, security, signatureFragments, remainderAddress, hmacKey)
    end
  else
    # If no input required, don't sign and simply finalize the bundle
    bundle.finalize()
    bundle.addTrytes(signatureFragments)

    bundleTrytes = []
    bundle.bundle.each do |bndl|
      bundleTrytes << @utils.transactionTrytes(bndl)
    end

    return bundleTrytes.reverse
  end
end

#reset ⇒ Object 



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# File 'lib/iota/models/account.rb', line 15

def reset
  @latestAddress = nil
  @addresses = []
  @transfers = []
  @inputs = []
  @balance = 0.0
end

#sendTransfer(depth, minWeightMagnitude, transfers, options = {}) ⇒ Object 



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# File 'lib/iota/models/account.rb', line 259

def sendTransfer(depth, minWeightMagnitude, transfers, options = {})
  # Check if correct depth and minWeightMagnitude
  if !@validator.isValue(depth) || !@validator.isValue(minWeightMagnitude)
    raise StandardError, "Invalid inputs provided"
  end

  trytes = prepareTransfers(transfers, options)

  @api.sendTrytes(trytes, depth, minWeightMagnitude, options) do |status, data|
    if !status
      raise StandardError, data
    else
      return data
    end
  end
end