Class: BTC::Block

Inherits:
BlockHeader show all
Defined in:
lib/btcruby/block.rb

Overview

Nodes collect new transactions into a block, hash them into a hash tree, and scan through nonce values to make the block’s hash satisfy proof-of-work requirements. When they solve the proof-of-work, they broadcast the block to everyone and the block is added to the block chain. The first transaction in the block is a special one that creates a new coin owned by the creator of the block.

Constant Summary

Constants inherited from BlockHeader

BTC::BlockHeader::CURRENT_VERSION, BTC::BlockHeader::ZERO_HASH256

Instance Attribute Summary collapse

Attributes inherited from BlockHeader

#bits, #block_hash, #block_id, #confirmations, #height, #merkle_root, #nonce, #previous_block_hash, #previous_block_id, #time, #timestamp, #version

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BlockHeader

#header_data

Constructor Details

#initialize(data: nil, stream: nil, version: CURRENT_VERSION, previous_block_hash: nil, previous_block_id: nil, merkle_root: nil, timestamp: 0, time: nil, bits: 0, nonce: 0, transactions: nil, height: nil, confirmations: nil) ⇒ Block

Returns a new instance of Block.



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# File 'lib/btcruby/block.rb', line 75

def initialize(data: nil,
               stream: nil,
               version: CURRENT_VERSION,
               previous_block_hash: nil,
               previous_block_id: nil,
               merkle_root: nil,
               timestamp: 0,
               time: nil,
               bits: 0,
               nonce: 0,
               transactions: nil,

               # optional attributes
               height: nil,
               confirmations: nil)
  super(
                   data: data,
                 stream: stream,
                version: version,
    previous_block_hash: previous_block_hash,
      previous_block_id: previous_block_id,
            merkle_root: merkle_root,
              timestamp: timestamp,
                   time: time,
                   bits: bits,
                  nonce: nonce,
                 height: height,
          confirmations: confirmations
  )

  @transactions = transactions if transactions
  @transactions ||= []
end

Instance Attribute Details

#transactions ⇒ Object

Array of BTC::Transaction objects



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# File 'lib/btcruby/block.rb', line 11

def transactions
  @transactions
end

Class Method Details

.genesis_mainnet ⇒ Object 



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# File 'lib/btcruby/block.rb', line 13

def self.genesis_mainnet
  self.new(
    version:             1,
    previous_block_hash: ZERO_HASH256,
    merkle_root:         BTC.from_hex("3ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a"),
    timestamp:           1231006505,
    bits:                0x1d00ffff,
    nonce:               0x7c2bac1d,
    transactions:        [BTC::Transaction.new(
      version:   1,
      inputs:    [
        BTC::TransactionInput.new(
          coinbase_data: BTC.from_hex("04FFFF001D010445"+
          "5468652054696D65732030332F4A616E2F32303039204368616E63656C6C6F72206F6E2062" +
          "72696E6B206F66207365636F6E64206261696C6F757420666F722062616E6B73"),
        )
      ],
      outputs:   [
        BTC::TransactionOutput.new(
          value: 50*COIN,
          script: Script.new(data: BTC.from_hex("4104678AFDB0FE5548271967F1"+
          "A67130B7105CD6A828E03909A67962E0EA1F61DEB649F6BC3F4CEF38"+
          "C4F35504E51EC112DE5C384DF7BA0B8D578A4C702B6BF11D5FAC"))
        )
      ],
      lock_time: 0
    )],
    height: 0
  )
end

.genesis_testnet ⇒ Object 



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# File 'lib/btcruby/block.rb', line 44

def self.genesis_testnet
  self.new(
    version:             1,
    previous_block_hash: ZERO_HASH256,
    merkle_root:         BTC.from_hex("3ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a"),
    timestamp:           1296688602,
    bits:                0x1d00ffff,
    nonce:               0x18aea41a,
    transactions:        [BTC::Transaction.new(
      version:   1,
      inputs:    [
        BTC::TransactionInput.new(
          coinbase_data: BTC.from_hex("04FFFF001D010445"+
          "5468652054696D65732030332F4A616E2F32303039204368616E63656C6C6F72206F6E2062" +
          "72696E6B206F66207365636F6E64206261696C6F757420666F722062616E6B73"),
        )
      ],
      outputs:   [
        BTC::TransactionOutput.new(
          value: 50*COIN,
          script: Script.new(data: BTC.from_hex("4104678AFDB0FE5548271967F1"+
          "A67130B7105CD6A828E03909A67962E0EA1F61DEB649F6BC3F4CEF38"+
          "C4F35504E51EC112DE5C384DF7BA0B8D578A4C702B6BF11D5FAC"))
        )
      ],
      lock_time: 0
    )],
    height: 0
  )
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/btcruby/block.rb', line 141

def ==(other)
  super(other) && @transactions == other.transactions
end

#block_header ⇒ Object 



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# File 'lib/btcruby/block.rb', line 129

def block_header
  BlockHeader.new(
    version:             self.version,
    previous_block_hash: self.previous_block_hash,
    merkle_root:         self.merkle_root,
    timestamp:           self.timestamp,
    bits:                self.bits,
    nonce:               self.nonce,
    height:              self.height,
    confirmations:       self.confirmations)
end

#data ⇒ Object 



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# File 'lib/btcruby/block.rb', line 120

def data
  data = super
  data << BTC::WireFormat.encode_varint(self.transactions.size)
  self.transactions.each do |tx|
    data << tx.data
  end
  data
end

#dup ⇒ Object 



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# File 'lib/btcruby/block.rb', line 145

def dup
  self.class.new(
    version:             self.version,
    previous_block_hash: self.previous_block_hash,
    merkle_root:         self.merkle_root,
    timestamp:           self.timestamp,
    bits:                self.bits,
    nonce:               self.nonce,
    transactions:        self.transactions.map{|t|t.dup},
    height:              self.height,
    confirmations:       self.confirmations)
end

#init_with_stream(stream) ⇒ Object 



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# File 'lib/btcruby/block.rb', line 109

def init_with_stream(stream)
  super(stream)
  if !(txs_count = BTC::WireFormat.read_varint(stream: stream).first)
    raise ArgumentError, "Failed to read count of transactions from the stream."
  end
  txs = (0...txs_count).map do
    Transaction.new(stream: stream)
  end
  @transactions = txs
end

#inspect ⇒ Object 



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# File 'lib/btcruby/block.rb', line 158

def inspect
  %{#<#{self.class.name}:#{self.block_id[0,24]}} +
  %{ ver:#{self.version}} +
  %{ prev:#{self.previous_block_id[0,24]}} +
  %{ merkle_root:#{BTC.id_from_hash(self.merkle_root)[0,16]}} +
  %{ timestamp:#{self.timestamp}} +
  %{ bits:0x#{self.bits.to_s(16)}} +
  %{ nonce:0x#{self.nonce.to_s(16)}} +
  %{ txs(#{self.transactions.size}): #{self.transactions.inspect}} +
  %{>}
end