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a native library implementing recursive length prefixes purely for the crystal language.

Home Page: https://q9f.github.io/rlp.cr/

License: Apache License 2.0

Crystal 100.00%

crystal crystal-language native-library rlp serialization ethereum transaction marshalling

rlp.cr's Issues

reduce pressure on garbage collector

avoid Rlp::Util.binary_add's segmented IO operations

instead, make all methods have an overload write to an IO, and the other overload which returns Bytes just creates an IO::Memory and calls the other overload.

ref https://www.reddit.com/r/crystal_programming/comments/ev2xig/wrote_a_native_library_implementing_rlp_recursive/

def self.encode(anything)
  io = IO::Memory.new
  encode(anything, io)
  io.to_slice # maybe add dup here
end

def self.encode(b : Bytes, io)
  # encode b into io
end

# and so on for other types

ref https://github.com/crystal-lang/crystal/blob/47bdbaa4d1638c76137bfa12de86eac454a15908/src/object.cr#L94-L105

Cannot decode nested lists of arbitrary depth

def foo(r : Number)
    if r === 0
        return ""
    elsif r === 1
        return [] of String
    elsif r === 2
        return Bytes[0x0]
    else
        bar = [] of (String | Bytes | Array(String | Bytes))
        return bar << foo Random.rand(3)
    end 
end

pp foo Random.rand(3)