Editing Codex/Requirements (section)

== 2. Overall Description ==

<span id="product-perspective"></span>
=== 2.1 Product Perspective ===

Codex is a core component of the Logos tech stack, serving as its decentralized storage layer. It provides:

# Module Storage and Delivery
#* Secure storage and delivery of Logos modules
#* Integration with Logos Module Manager
#* Version management and verification
# Web Hosting and Content Delivery
#* Static website hosting
#* Dynamic content delivery
#* Content addressing and resolution
#* CDN-like distribution
# Archival Cold Storage for large datasets
# System Integration
#* Blockchain networks for marketplace operations
#* Storage providers for data persistence
#* Client applications for data access
#* Nomos for consensus operations

The system operates independently of centralized services, relying instead on a network of decentralized nodes.

<span id="product-functions"></span>
=== 2.2 Product Functions ===

The major functions of Codex include:

# Storage Functions
#* Hot storage for frequently accessed modules and web content
#* Cold storage for large archival datasets
#* Data storage and retrieval with strong durability guarantees
#* Erasure coding for data redundancy
# Verification Functions
#* Zero-knowledge proofs for storage verification
#* Marketplace for storage providers and clients
#* DHT-based content discovery
#* Automated data repair mechanisms
# Management Functions
#* Node operations and monitoring (MUST)
#* Basic data lifecycle tracking (MUST)
#* Storage class optimization (SHOULD)
#* Access pattern analysis (SHOULD)

<span id="user-classes-and-characteristics"></span>
=== 2.3 User Classes and Characteristics ===

# Storage Providers
#* Provide storage capacity to the network
#* Run storage nodes with high uptime
#* Technical expertise in node operations
#* Motivated by economic incentives
# Storage Clients
#* Store and retrieve data from the network
#* May have varying technical expertise
#* Include both individuals and applications
#* Concerned with data durability and costs
# Aggregator Nodes (Future)
#* Provide specialized services for proof generation
#* High computational resources
#* Technical expertise in cryptography
#* Optional participation in the network

<span id="operating-environment"></span>
=== 2.4 Operating Environment ===

The system MUST operate in a decentralized environment with:

* Various operating systems (Linux, Windows, MacOS)
* Different hardware configurations
* Unreliable network connections
* Varying node capabilities and resources
* Blockchain integration for marketplace operations

<span id="design-and-implementation-constraints"></span>
=== 2.5 Design and Implementation Constraints ===

* MUST use erasure coding for data redundancy
* MUST implement zero-knowledge proofs for storage verification
* MUST be compatible with blockchain networks for marketplace operations
* MUST operate in a fully decentralized manner
* MUST support content-addressable storage
* MUST handle network partitions and node failures
* SHOULD minimize resource requirements for basic participation

<span id="user-documentation"></span>
=== 2.6 User Documentation ===

The following documentation MUST be provided:

* Installation and setup guides for different node types
* API documentation for client integration
* Storage provider operation manual
* Marketplace participation guide
* Troubleshooting guide
* Security best practices

<span id="assumptions-and-dependencies"></span>
=== 2.7 Assumptions and Dependencies ===

Assumptions:
* Network participants have basic internet connectivity
* Storage providers can maintain reasonable uptime
* Blockchain networks are available for marketplace operations

Dependencies:
* Availability of blockchain networks for smart contracts
* Cryptographic libraries for zero-knowledge proofs
* DHT implementation for content discovery
* Erasure coding libraries

<span id="external-interface-requirements"></span>