Darkita Reference Collection

1. Overview

Darkita is a 10,000-piece PFP collection inscribed on Bitcoin that implements the Sparkle genesis and child format. It serves as the reference implementation for testing and demonstrating Lightning/Spark checkout for Ordinals.

2. On-Chain Data

2.1 Genesis Inscription

The genesis inscription declares collection parameters:

{
  "p": "sparkle",
  "op": "genesis",
  "version": 1,
  "collection": {
    "name": "Darkita",
    "symbol": "DARKITA",
    "description": "10K PFP collection demonstrating Sparkle Protocol",
    "supply": 10000,
    "creator": {
      "name": "Sparkle Labs",
      "website": "https://sparkleprotocol.com"
    }
  },
  "spark": {
    "enabled": true,
    "networks": ["spark", "ln-mainnet"]
  },
  "royalties": {
    "bps": 500,
    "recipients": [{
      "label": "creator",
      "lightning_address": "darkita@example.com"
    }]
  }
}

Genesis Inscription ID: Regtest verified - Mainnet deployment pending

2.2 Example Child Inscription

{
  "p": "sparkle",
  "op": "child",
  "version": 1,
  "collection_ref": "<genesis_inscription_id>",
  "token": {
    "id": 1234,
    "name": "Darkita #1234"
  },
  "media": {
    "type": "image/svg+xml",
    "recursive_parents": [
      "<background_trait_id>",
      "<body_trait_id>",
      "<eyes_trait_id>",
      "<accessory_trait_id>"
    ]
  },
  "traits": {
    "Background": "Sunset",
    "Body": "Akita",
    "Eyes": "Laser",
    "Accessory": "Gold Chain"
  }
}

3. Sparkle Implementation

3.1 Genesis Declaration

The Darkita genesis inscription declares:

• Collection name, symbol, and 10,000 supply
• Creator information and contact details
• Lightning/Spark enabled status
• 5% creator royalty (500 basis points)

3.2 Child References

Each Darkita NFT:

• References the genesis inscription via collection_ref
• Has a unique token ID from 1 to 10,000
• Includes trait metadata for marketplace filtering
• Uses recursive parent references for cost efficiency

3.3 Recursive Inscriptions

Darkita utilizes recursive inscriptions to achieve significant cost reduction:

• 200 trait inscriptions serve as reusable parents
• 10,000 child inscriptions reference these parents
• Each child inscription is approximately 400 bytes
• Total storage reduced from 200MB to approximately 5MB

4. Cost Analysis

4.1 Traditional Approach

4.2 Sparkle with Recursive Inscriptions

4.3 Cost Reduction

By implementing recursive inscriptions with Sparkle Protocol:

• Total cost reduction: approximately 99%
• Per-NFT cost reduction: from $15.00 to $0.19
• Storage reduction: from 200MB to 5MB

Note: Costs are estimates based on typical fee rates and may vary with network conditions.

5. Collection Roadmap