Class: Multichain::Encoder

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

Class Method Summary collapse

Class Method Details

.decode(hexified) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 56

def self.decode hexified
  dehexify hexified
end

.dehexify(hexified) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 52

def self.dehexify hexified
  hexified.scan(/../).map { |x| x.hex.chr }.join
end

.encode(url, headers = self.headers) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 48

def self.encode url, headers = self.headers
  hexify url, headers = self.headers
end

.extract(input_string) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 27

def self.extract input_string
  parts = input_string.split '|'
  keys = [
    :timestamp,
    :url,
    :headers,
    :hash
  ]
  h = {}

  keys.each_with_index do |k, i|
    h[k] = parts[i]
  end

  h
end

.hash(url, headers = self.headers) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 13

def self.hash url, headers = self.headers
  sha256 url, headers = self.headers
end

.headers ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 3

def self.headers
  {
    'Accept' => 'application/json'
  }
end

.hexify(url, headers = self.headers) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 44

def self.hexify url, headers = self.headers
  input_string(url).each_byte.map { |b| b.to_s(16) }.join
end

.input_string(url, headers = self.headers) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 17

def self.input_string url, headers = self.headers
  a = []
  a.push Time.new.to_i
  a.push url
  a.push headers.to_json
  a.push sha256(url)

  a.join '|'
end

.sha256(url, headers = self.headers) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 9

def self.sha256 url, headers = self.headers
  body = Digest::SHA256.hexdigest(HTTParty.get(url, headers: headers).body)
end

.verify(hexified) ⇒ Object 



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# File 'lib/multichain/encoder.rb', line 60

def self.verify hexified
  parts = extract dehexify hexified
  parts[:hash] == sha256(parts[:url])
end