class EthereumContractABI::ContractInterface::Function
Attributes
inputs[R]
name[R]
outputs[R]
Public Class Methods
new(name, inputs, outputs)
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# File lib/ethereum-contract-abi/contract/function.rb, line 15 def initialize(name, inputs, outputs) @name = name @inputs = inputs @outputs = outputs @decoder = FunctionDecoder.new(outputs) @encoder = FunctionEncoder.new(inputs) end
Public Instance Methods
decode_output(output_string)
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# File lib/ethereum-contract-abi/contract/function.rb, line 48 def decode_output(output_string) output_hex_string = EthereumContractABI::Util.remove_hex_prefix(output_string) if has_any_dynamic_outputs @decoder.decode_dynamic_output(output_hex_string) else @decoder.decode_static_output(output_hex_string) end end
encode_call(*args)
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# File lib/ethereum-contract-abi/contract/function.rb, line 38 def encode_call(*args) raise ArgumentError.new("Invalid function arguments") unless valid_args?(args) if has_any_dynamic_inputs encoded_input = @encoder.encode_dynamic_input(args) else encoded_input = @encoder.encode_static_input(args) end EthereumContractABI::Util.fromHexByteString(method_id + encoded_input) end
method_id()
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# File lib/ethereum-contract-abi/contract/function.rb, line 28 def method_id hash = [Digest::Keccak256.new.hexdigest(signature)].pack("H*") hash.slice(0..3) end
signature()
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# File lib/ethereum-contract-abi/contract/function.rb, line 23 def signature params = @inputs.map { |i| i.type.to_s } "#{@name}(#{params.join(",")})" end
valid_args?(args)
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# File lib/ethereum-contract-abi/contract/function.rb, line 33 def valid_args?(args) return false unless args.size === @inputs.size true end
Private Instance Methods
has_any_dynamic_inputs()
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# File lib/ethereum-contract-abi/contract/function.rb, line 63 def has_any_dynamic_inputs @inputs.find { |o| o.type.is_dynamic } end
has_any_dynamic_outputs()
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# File lib/ethereum-contract-abi/contract/function.rb, line 59 def has_any_dynamic_outputs @outputs.find { |o| o.type.is_dynamic } end