Class: Factom::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/factom-ruby/client.rb

Constant Summary collapse

PREFIX_FA = 
'FA'.freeze
PREFIX_EC = 
'EC'.freeze
ADDRESS_PREFIX = 
{
  PREFIX_FA => '5fb1',
  PREFIX_EC => '592a'
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(endpoint, ec_private_key, version = 'v1') ⇒ Client

Returns a new instance of Client.



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# File 'lib/factom-ruby/client.rb', line 202

def initialize(endpoint, ec_private_key, version='v1')
  @endpoint = endpoint.gsub(/\/\z/, '')
  @ec_private_key = ec_private_key =~ /\A#{PREFIX_EC}/ ? address_to_pubkey(ec_private_key) : ec_private_key
  self.instance_eval { extend ::Factom.const_get("API#{version}", false) }
end

Instance Attribute Details

#endpoint ⇒ Object (readonly)

Returns the value of attribute endpoint.



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# File 'lib/factom-ruby/client.rb', line 193

def endpoint
  @endpoint
end

Instance Method Details

#address_to_pubkey(addr) ⇒ Object

to pubkey in hex, 32 bytes



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# File 'lib/factom-ruby/client.rb', line 236

def address_to_pubkey(addr)
  return unless addr.size == 52

  prefix = ADDRESS_PREFIX[addr[0,2]]
  return unless prefix

  v = Bitcoin.decode_base58(addr)
  return if v[0,4] != prefix

  bytes = [v[0, 68]].pack('H*')
  return if v[68, 8] != sha256d(bytes)[0, 8]

  v[4, 64]
end

#ec_address ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 231

def ec_address
  @ec_address ||= pubkey_to_address ADDRESS_PREFIX[PREFIX_EC], ec_public_key
end

#ec_public_key ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 227

def ec_public_key
  @ec_public_key ||= signing_key.verify_key.to_s.unpack('H*').first
end

#get(path, params = {}, options = {}) ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 216

def get(path, params={}, options={})
  JSON.parse raw_get(path, params, options)
end

#pubkey_to_address(prefix, pubkey) ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 251

def pubkey_to_address(prefix, pubkey)
  return unless pubkey.size == 64 # 32 bytes in hex

  addr = "#{prefix}#{pubkey}"
  bytes = [addr].pack('H*')

  Bitcoin.encode_base58 "#{addr}#{sha256d(bytes)[0,8]}"
end

#raw_get(path, params = {}, options = {}) ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 208

def raw_get(path, params={}, options={})
  uri = "#{endpoint}#{path}"
  options = {accept: :json}.merge(options)
  options[:params] = params

  RestClient.get uri, options
end

#raw_post(path, params = {}, options = {}) ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 220

def raw_post(path, params={}, options={})
  uri = "#{endpoint}#{path}"
  options = {accept: :json}.merge(options)

  RestClient.post uri, params, options
end

#sha256d(bytes) ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 260

def sha256d(bytes)
  Digest::SHA256.hexdigest(Digest::SHA256.digest(bytes))
end

#sign(message) ⇒ Object 



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# File 'lib/factom-ruby/client.rb', line 269

def sign(message)
  sig = signing_key.sign([message].pack('H*')).unpack('H*').first
  "#{message}#{ec_public_key}#{sig}"
end

#signing_key ⇒ Object

ed25519 private key



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# File 'lib/factom-ruby/client.rb', line 265

def signing_key
  @signing_key ||= RbNaCl::SigningKey.new([@ec_private_key].pack('H*'))
end