Class: BitcoinNode::Protocol::Payload

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

Direct Known Subclasses

Addr, Getaddr, Inv, Ping, Pong, Verack, Version

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes = {}) ⇒ Payload

Returns a new instance of Payload.



151
152
153
154
155
156
157
158
159
160
 
# File 'lib/bitcoin_node/protocol.rb', line 151

def initialize(attributes = {})
  attributes.each do |k,v|
    self.send("#{k}=", v) 
  end
  missings = self.class.field_names - attributes.keys
  missings.each do |k|
    d = self.class.defaults[k]
    self.send("#{k}=", Proc === d ? d.call : d)
  end
end

Class Method Details

.defaults ⇒ Object 



124
125
126
 
# File 'lib/bitcoin_node/protocol.rb', line 124

def defaults
  @defaults ||= {}
end

.field(name, type, options = {}) ⇒ Object 



107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# File 'lib/bitcoin_node/protocol.rb', line 107

def field(name, type, options = {})
  define_method(name) do
    instance_fields[name]
  end

  define_method("#{name}=") do |value|
    if type === value
      instance_fields[name] = value
    else
      instance_fields[name] = type.new(*Array(value))
    end
  end

  fields[name] = type
  defaults[name] = options[:default] if options[:default]
end

.field_names ⇒ Object 



132
133
134
 
# File 'lib/bitcoin_node/protocol.rb', line 132

def field_names
  fields.keys
end

.fields ⇒ Object 



128
129
130
 
# File 'lib/bitcoin_node/protocol.rb', line 128

def fields
  @fields ||= {}
end

.parse(payload) ⇒ Object 



136
137
138
139
140
141
142
143
144
145
146
147
148
 
# File 'lib/bitcoin_node/protocol.rb', line 136

def parse(payload)
  result = fields.inject({}) do |memo, (field_name, type)|
    custom_parse_method = "parse_#{field_name.to_s}"
    parsed, payload = if respond_to?(custom_parse_method)
      public_send(custom_parse_method, payload, memo)
    else
      type.parse(payload)
    end
    memo[field_name] = parsed
    memo
  end
  new(result)
end

Instance Method Details

#bytesize ⇒ Object 



169
170
171
 
# File 'lib/bitcoin_node/protocol.rb', line 169

def bytesize
  raw.bytesize
end

#name ⇒ Object 



177
178
179
 
# File 'lib/bitcoin_node/protocol.rb', line 177

def name
  type.downcase 
end

#raw ⇒ Object 



162
163
164
165
166
167
 
# File 'lib/bitcoin_node/protocol.rb', line 162

def raw
  @raw ||= begin
    ordered = instance_fields.values_at(*self.class.field_names)
    ordered.map(&:pack).join
  end
end

#to_s ⇒ Object Also known as: inspect 



181
182
183
 
# File 'lib/bitcoin_node/protocol.rb', line 181

def to_s
  "#<#{type} #{@instance_fields.inspect}>"
end

#type ⇒ Object 



173
174
175
 
# File 'lib/bitcoin_node/protocol.rb', line 173

def type
  self.class.name.split('::').last
end