Class: Tierion::HashApi::Receipt

Inherits:
Hash
  • Object
show all
Includes:
Hashie::Extensions::IndifferentAccess, Hashie::Extensions::MergeInitializer, Hashie::Extensions::MethodAccess
Defined in:
lib/tierion/hash_api/receipt.rb

Instance Method Summary collapse

Instance Method Details

#confirmations ⇒ Object 



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# File 'lib/tierion/hash_api/receipt.rb', line 12

def confirmations
  get_confirmations
  @confs
end

#to_pretty_json ⇒ Object 



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# File 'lib/tierion/hash_api/receipt.rb', line 8

def to_pretty_json
  puts JSON.pretty_generate(self)
end

#valid? ⇒ Boolean

Checks the validity of the Merkle tree proof and return true or false

Returns:

  • (Boolean) 


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# File 'lib/tierion/hash_api/receipt.rb', line 19

def valid?
  return false if targetHash.blank? || merkleRoot.blank?

  # No siblings, single item tree, so the hash
  # should also be the root
  return targetHash == merkleRoot if proof.empty?

  # The target hash (the hash the user submitted)
  # is always hashed in the first cycle through the
  # proofs. After that, the proof_hash value will
  # contain intermediate hashes.
  proof_hash = targetHash

  proof.each do |p|
    h = Digest::SHA256.new
    if p.key?('left')
      h.update hex2bin(p['left'])
      h.update hex2bin(proof_hash)
    elsif p.key?('right')
      h.update hex2bin(proof_hash)
      h.update hex2bin(p['right'])
    else
      return false
    end
    proof_hash = h.hexdigest
  end

  proof_hash == merkleRoot
end