PoliBa-Software-Architecture/Message-Utils
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V0.7.0 Arroyo Toad

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Asset/MessageBytes.md
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# Message Structure
```
+-+ 64 - bits---+----------------+-------------+----------------+-----------------------+
|0| Version 7 | Message Type 8 | Dev Type 8 | RESERVED 8 | Sign Type 32 |
|0| Version 7 | Message Type 8 | Dev Type 8 | RESERVED 8 | Sign Type 32 |
+-+-------------+----------------+-------------+----------------+-----------------------+
| Timestamp 64 |
+---------------------------------------------------------------------------------------+

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README.md
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# Message-Utils
Here you can find all the libraries related to the message structure for transmitting [`FarmToad-IoT-Messages`](#message-structure)
## Swift-MessageUtils
It's a library in swift to serialize and deserialize a
message. However, it has been only carefully tested for
**Serialization** of the message and **Deserialization**
without signature checks.
## Typescript-MessageUtils
It's a Typescript library (Compatible with JavaScript too) that aims
to offer only the **Deserialization** along a **Signature Check**.
However, here it is not offered any type of **Serialization** features
as deemed unnecessary during the development of the project.
# Message Structure
Messages were left with a broad margin for versions, signatures, and
fields, to ensure a high degree of flexibility in the project.
Here it is described the message structure for each
`FarmToad-IoT-Messages`.
## Index
- [`Main Corpus`](#main-corpus)
- [`Fields`](#fields)
## Main corpus
```
+-+ 64 - bits---+----------------+-------------+----------------+-----------------------+
|0| Version 7 | Message Type 8 | Dev Type 8 | RESERVED 8 | Sign Type 32 |
+-+-------------+----------------+-------------+----------------+-----------------------+
| Timestamp 64 |
+---------------------------------------------------------------------------------------+
| DevID 128 bits |
| |
+---------------------------------------------------------------------------------------+
| Location 192 bits |
| |
| |
+---------------------------------------------------------------------------------------+
\ /
| Fields -----------------------------------------------------------------------------|
/ \
+---------------------------------------------------------------------------------------+
| 0 Padding 64 - n |
+---------------------------------------------------------------------------------------+
| Signature up to-512 bits |
| |
| |
| |
| |
| |
| |
| |
+---------------------------------------------------------------------------------------+
```
## Fields
each field can be at most 8 * 2^32 bits of length:
- 34359738368 bits
- 4294967296 Bytes
```
+-- 64 - bits--------------------------+----------------------------------------+
| Key-Length 32 | Value-Length 32 |
+--------------------------------------+----------------------------------------+
\ Key /
|-----------------------------------------------------------------------------|
/ Value \
+-------------------------------------------------------------------------------+
```
## Key
**MUST** be a `String`
## Value
It's up to the Application to decide whether the value is
a string or another type of datum