Class: Etherlite::Contract::Function

Inherits:
Object
  • Object
show all
Defined in:
lib/etherlite/contract/function.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(_name, _inputs, _outputs, _payable, _constant) ⇒ Function

Returns a new instance of Function.



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# File 'lib/etherlite/contract/function.rb', line 5

def initialize(_name, _inputs, _outputs, _payable, _constant)
  @name = _name
  @inputs = _inputs
  @outputs = _outputs

  @payable = _payable
  @constant = _constant
end

Instance Attribute Details

#inputs ⇒ Object (readonly)

Returns the value of attribute inputs.



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# File 'lib/etherlite/contract/function.rb', line 3

def inputs
  @inputs
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/etherlite/contract/function.rb', line 3

def name
  @name
end

#outputs ⇒ Object (readonly)

Returns the value of attribute outputs.



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# File 'lib/etherlite/contract/function.rb', line 3

def outputs
  @outputs
end

Instance Method Details

#constant? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/etherlite/contract/function.rb', line 14

def constant?
  @constant
end

#decode(_connection, _data) ⇒ Object 



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# File 'lib/etherlite/contract/function.rb', line 44

def decode(_connection, _data)
  return nil if @outputs.empty?

  result = Etherlite::Support::Array.decode(_connection, @outputs, _data[2..-1])
  result.length > 1 ? result : result[0]
end

#encode(_values) ⇒ Object 



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# File 'lib/etherlite/contract/function.rb', line 29

def encode(_values)
  if _values.length != @inputs.count
    raise ArgumentError, "Expected #{@inputs.count} arguments, got #{_values.length} "
  end

  encoded_inputs = Etherlite::Support::Array.encode(@inputs.map(&:type), _values)

  if @name
    signature_hash = Etherlite::Utils.sha3 signature
    '0x' + signature_hash[0..7] + encoded_inputs
  else
    encoded_inputs # if no name is provided, just render arguments
  end
end

#payable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/etherlite/contract/function.rb', line 18

def payable?
  @payable
end

#signature ⇒ Object 



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# File 'lib/etherlite/contract/function.rb', line 22

def signature
  @signature ||= begin
    arg_signatures = @inputs.map &:signature
    "#{@name}(#{arg_signatures.join(',')})"
  end
end