Class: Bitcoin::Builder::TxInBuilder

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

Overview

create a Bitcoin::Protocol::TxIn used by TxBuilder#input.

inputs need a #prev_out tx and #prev_out_index of the output they spend.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TxInBuilder

Returns a new instance of TxInBuilder.



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# File 'lib/bitcoin/builder.rb', line 207

def initialize
  @txin = P::TxIn.new
end

Instance Attribute Details

#coinbase_data ⇒ Object (readonly)

Returns the value of attribute coinbase_data.



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# File 'lib/bitcoin/builder.rb', line 205

def coinbase_data
  @coinbase_data
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/bitcoin/builder.rb', line 205

def key
  @key
end

Instance Method Details

#coinbase(data = nil) ⇒ Object

specify that this is a coinbase input. optionally set data.



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# File 'lib/bitcoin/builder.rb', line 233

def coinbase data = nil
  @coinbase_data = data || OpenSSL::Random.random_bytes(32)
  @prev_out = nil
  @prev_out_index = 4294967295
end

#prev_out(tx, idx = nil) ⇒ Object

previous transaction that contains the output we want to use.



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# File 'lib/bitcoin/builder.rb', line 212

def prev_out tx, idx = nil
  @prev_out, @prev_out_index = tx, idx
end

#prev_out_index(i) ⇒ Object

index of the output in the #prev_out transaction.



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# File 'lib/bitcoin/builder.rb', line 217

def prev_out_index i
  @prev_out_index = i
end

#sequence(s) ⇒ Object

specify sequence. this is usually not needed.



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# File 'lib/bitcoin/builder.rb', line 222

def sequence s
  @sequence = s
end

#signature_key(key) ⇒ Object

Bitcoin::Key used to sign the signature_hash for the input. see Bitcoin::Script.signature_hash_for_input and Bitcoin::Key.sign.



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# File 'lib/bitcoin/builder.rb', line 228

def signature_key key
  @key = key
end

#txin ⇒ Object

create the txin according to values specified via DSL



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# File 'lib/bitcoin/builder.rb', line 240

def txin
  @txin.prev_out = (@prev_out ? @prev_out.binary_hash : "\x00"*32)
  @txin.prev_out_index = @prev_out_index
  @txin.sequence = @sequence || "\xff\xff\xff\xff"
  @txin
end