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SSZ: List serialization with variable element size 

Fix #232
This commit is contained in:
Jannik Luhn 2019-01-22 17:14:25 +01:00
parent 5c2b595c2d
commit a5519a7d3b
1 changed files with 3 additions and 3 deletions
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specs/simple-serialize.md
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@ -143,9 +143,9 @@ Lists are a collection of elements of the same homogeneous type.
| Length of serialized list fits into 4 bytes | ``len(serialized) < 2**32`` | | 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)``. 1. Serialize all list elements individually and concatenate them.
* Encode that as a `4-byte` **little endian** `uint32`.
2. Append the elements in a packed manner. 2. Prefix the concatenation with its length encoded as a `4-byte` **little-endian** unsigned integer.
* *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. * *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.