Class: String

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

Instance Method Summary collapse

Instance Method Details

#bth ⇒ Object

binary convert to hex string



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# File 'lib/bitcoin.rb', line 124

def bth
  unpack1('H*')
end

#bti ⇒ Object

binary convert to integer



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# File 'lib/bitcoin.rb', line 134

def bti
  bth.to_i(16)
end

#htb ⇒ Object

hex string convert to binary



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# File 'lib/bitcoin.rb', line 129

def htb
  [self].pack('H*')
end

#opcode ⇒ Object

get opcode



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# File 'lib/bitcoin.rb', line 144

def opcode
  force_encoding(Encoding::ASCII_8BIT).ord
end

#opcode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitcoin.rb', line 148

def opcode?
  !pushdata?
end

#push_opcode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitcoin.rb', line 152

def push_opcode?
  [Bitcoin::Opcodes::OP_PUSHDATA1, Bitcoin::Opcodes::OP_PUSHDATA2, Bitcoin::Opcodes::OP_PUSHDATA4].include?(opcode)
end

#pushdata? ⇒ Boolean

whether data push only?

Returns:

  • (Boolean) 


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# File 'lib/bitcoin.rb', line 157

def pushdata?
  opcode <= Bitcoin::Opcodes::OP_PUSHDATA4 && opcode > Bitcoin::Opcodes::OP_0
end

#pushed_data ⇒ Object 



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# File 'lib/bitcoin.rb', line 161

def pushed_data
  return nil unless pushdata?
  offset = 1
  case opcode
  when Bitcoin::Opcodes::OP_PUSHDATA1
    offset += 1
  when Bitcoin::Opcodes::OP_PUSHDATA2
    offset += 2
  when Bitcoin::Opcodes::OP_PUSHDATA4
    offset += 4
  end
  self[offset..-1]
end

#rhex ⇒ Object

reverse hex string endian



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# File 'lib/bitcoin.rb', line 139

def rhex
  htb.reverse.bth
end

#valid_hex? ⇒ Boolean

whether value is hex or not hex

Returns:

  • (Boolean) —

    return true if data is hex



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# File 'lib/bitcoin.rb', line 198

def valid_hex?
  !self[/\H/]
end

#valid_pushdata_length? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitcoin.rb', line 175

def valid_pushdata_length?
  buf = StringIO.new(self)
  opcode = buf.read(1).ord
  offset = 1
  return false if buf.eof?
  len = case opcode
        when Bitcoin::Opcodes::OP_PUSHDATA1
          offset += 1
          buf.read(1).unpack1('C')
        when Bitcoin::Opcodes::OP_PUSHDATA2
          offset += 2
          buf.read(2).unpack1('v')
        when Bitcoin::Opcodes::OP_PUSHDATA4
          offset += 4
          buf.read(4).unpack1('V')
        else
          opcode
        end
  self.bytesize == len + offset
end