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The new ABI encoder is able to encode and decode arbitrarily nested arrays and structs. It produces less optimal code (the optimizer for this part of the code is still under development).

4 votes
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ABI encoding with tuples

Strictly speaking, there are no tuples in your example. Type uint8[] is a dynamic array type, not a tuple. Here is the encoding decomposed: 47958782 …
Mikhail Vladimirov's user avatar
3 votes

AbiEncoderV2 encoding Tuple algorithm

Basically, a tuple is encoded as if all its members were separate parameters, so the following function returns true: struct Foo { uint x; uint y; uint z; } function foo () public pure returns …
Mikhail Vladimirov's user avatar