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Merge pull request #484 from jannikluhn/ssz-var-length-list 

SSZ: Lists of elements with non-constant element size
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Hsiao-Wei Wang 2019-01-28 17:57:26 +08:00 committed by GitHub
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specs/simple-serialize.md
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@ -143,11 +143,8 @@ Lists are a collection of elements of the same homogeneous type.
|:--------------------------------------------|:----------------------------|
| Length of serialized list fits into 4 bytes | ``len(serialized) < 2**32`` |
1. Get the number of raw bytes to serialize: it is ``len(list) * sizeof(element)``.
* Encode that as a `4-byte` **little endian** `uint32`.
2. Append the elements in a packed manner.
* *Note on efficiency*: consider using a container that does not need to iterate over all elements to get its length. For example Python lists, C++ vectors or Rust Vec.
1. Serialize all list elements individually and concatenate them.
2. Prefix the concatenation with its length encoded as a `4-byte` **little-endian** unsigned integer.
**Example in Python**