Class: Bitcoin::Protocol::TxIn

Inherits:

Object

• Object
• Bitcoin::Protocol::TxIn

show all

Defined in:

lib/bitcoin/protocol/txin.rb

Instance Attribute Summary (collapse)

• - (Object) prev_out

  Returns the value of attribute prev_out.

• - (Object) prev_out_index

  Returns the value of attribute prev_out_index.

• - (Object) script_sig

  Returns the value of attribute script_sig.

• - (Object) script_sig_length

  Returns the value of attribute script_sig_length.

• - (Object) sequence

  Returns the value of attribute sequence.

Instance Method Summary (collapse)

• - (Object) [](idx)
• - (Object) []=(idx, val)
• - (Boolean) coinbase?
• - (TxIn) initialize(*args) constructor

  A new instance of TxIn.

• - (Object) parse_data(data)

  parse raw binary data for transaction input.

• - (Object) previous_output

  previous output in hex.

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# File 'lib/bitcoin/protocol/txin.rb', line 8

def initialize *args
  @prev_out, @prev_out_index, @script_sig_length,
  @script_sig, @sequence = *args
end

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# File 'lib/bitcoin/protocol/txin.rb', line 6

def prev_out
  @prev_out
end

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# File 'lib/bitcoin/protocol/txin.rb', line 6

def prev_out_index
  @prev_out_index
end

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# File 'lib/bitcoin/protocol/txin.rb', line 6

def script_sig
  @script_sig
end

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# File 'lib/bitcoin/protocol/txin.rb', line 6

def script_sig_length
  @script_sig_length
end

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# File 'lib/bitcoin/protocol/txin.rb', line 6

def sequence
  @sequence
end

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# File 'lib/bitcoin/protocol/txin.rb', line 13

def [] idx
  case idx
  when 0 then @prev_out
  when 1 then @prev_out_index
  when 2 then @script_sig_length
  when 3 then @script_sig
  when 4 then @sequence
  end
end

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# File 'lib/bitcoin/protocol/txin.rb', line 23

def []= idx, val
  case idx
  when 0 then @prev_out = val
  when 1 then @prev_out_index = val
  when 2 then @script_sig_length = val
  when 3 then @script_sig = val
  when 4 then @sequence = val
  end
end

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# File 'lib/bitcoin/protocol/txin.rb', line 49

def coinbase?
  (@prev_out_index == 4294967295) && (@prev_out == "\x00"*32)
end

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# File 'lib/bitcoin/protocol/txin.rb', line 34

def parse_data(data)
  idx = 0
  @prev_out, @prev_out_index = data[idx...idx+=36].unpack("a32I")
  @script_sig_length, tmp = Protocol.unpack_var_int(data[idx..-1])
  idx += data[idx..-1].bytesize - tmp.bytesize
  @script_sig = data[idx...idx+=@script_sig_length]
  @sequence = data[idx...idx+=4]
  idx
end

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# File 'lib/bitcoin/protocol/txin.rb', line 45

def previous_output
  @prev_out.reverse.unpack("H*")[0]
end