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Piper Merriam 2019-03-20 09:12:49 -06:00
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specs/simple-serialize.md
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@ -54,7 +54,7 @@ For convenience we alias:
We recursively define the `serialize` function which consumes an object `value` (of the type specified) and returns a bytestring of type `"bytes"`.
> *Note*: In the function definitions below (`serialize`, `hash_tree_root`, `signed_root`, etc.) objects implicitly carry their type.
> *Note*: In the function definitions below (`serialize`, `hash_tree_root`, `signed_root`, `is_fixed_size`, `is_variable_size` etc.) objects implicitly carry their type.
### Basic Types
@ -83,17 +83,19 @@ return b"\x01" if value is True else b"\x00"
The serialized representation of composite types is comprised of two binary sections.
* The first section is *fixed size* for all types, containing the concatenation of *either*
- The serialized representation for each of the *fixed size* elements of value
- The `"uint32"` serialized offset where the serialized representation of the *variable sized* type is located in the second section relative to the beginning of the first section.
* The first section is *fixed size* for all types, containing the concatenation of
- The serialized representation for each of the *fixed size* elements from the value
- The `"uint32"` serialized offset where the serialized representation of the *variable sized* elements from the value are located in the second section.
* The second section contains the concatenation of the serialized representations of **only** the *variable size* types.
- This section is empty in the case of a purely *fixed size* type.
> **NOTE**: Offsets are relative to the beginning of the beginning of the entire serialized representation (the start of the first section)
#### `"vector"`, `"container"` and `"list"`
An implementation of the `serialize` function for `"Vector"`, `"Container"` and
`"List"` types would take the following form.
Below is an illustrative implementation of the `serialize` function for `"Vector"`,
`"Container"` and `"List"` types.
```python
# The second section is just the concatenation of the serialized *variable size* elements