Error when decoding a function with two argument of type array or bytes

[pthomalla]

example use:

<<_, _, _, _, data::bytes>> =
      [[1, 2, 3, 4], [4, 5, 6]]
      |> ABI.TypeEncoder.encode(%ABI.FunctionSelector{
        function: "baz",
        types: [{:array, {:uint, 32}}, {:array, {:uint, 32}}]
      })
data
    |> ABI.TypeDecoder.decode(%ABI.FunctionSelector{
      function: "baz",
      types: [{:array, {:uint, 32}}, {:array, {:uint, 32}}]
    })

received error:

** (CompileError) iex:1: ABI.FunctionSelector.__struct__/1 is undefined, cannot expand struct ABI.FunctionSelector
    (stdlib) lists.erl:1354: :lists.mapfoldl/3
    (stdlib) lists.erl:1355: :lists.mapfoldl/3
    (elixir) expanding macro: Kernel.|>/2
    iex:1: (file)

[zachdaniel]

@pthomalla That error is saying that the ABI.FunctionSelector struct is not defined/compiled. Are you sure that you have included ex_abi (the latest version) into your mix.exs?

[pthomalla]

@zachdaniel you're right the error is from an older version :/
in master it's use a lot of memory and crash.

Process Information

--------------------------------------------------
=proc:<0.304.0>
State: Scheduled
Spawned as: proc_lib:init_p/5
Current call: 'Elixir.ABI.TypeDecoder':'-decode_data/4-fun-0-'/3
Spawned by: <0.74.0>
Message queue length: 0
Number of heap fragments: 0
Heap fragment data: 0
Link list: [{from,<0.74.0>,#Ref<0.629182156.262147.238297>}]
Dictionary: [{'$ancestors',[<0.74.0>]},{'$initial_call',{'Elixir.IEx.Evaluator',init,4}},{iex_history,#{'__struct__'=>'Elixir.IEx.History',queue=>{[],[]},size=>0,start=>1}},{iex_evaluator,ack}]
Reductions: 1239878306
Stack+heap: 850246556
OldHeap: 0
Heap unused: 59637865
OldHeap unused: 0
BinVHeap: 36
OldBinVHeap: 0
BinVHeap unused: 46386
OldBinVHeap unused: 46422
Memory: 6801973332
Stack dump:
Program counter: 0x00007fda4a9ce7b8 ('Elixir.ABI.TypeDecoder':'-decode_data/4-fun-0-'/3 + 24)
CP: 0x00007fda4a7f93d8 ('Elixir.Enum':reduce_range_inc/4 + 120)
arity = 4
   395303887
   [{uint,32},{uint,32},{uint .....

in function

 defp decode_data(binary_data, {:array, type}, :dynamic, head_data)

trying make value repeated_type of large number of elements.

but i thing that error is in

defp do_decode_raw(binary_data, type, cursor_offset, acc)

current_head_bit_length should be calculated not only from type but allow from current_head_data

[ayrat555]

resolved by #14