---

name: lsp28-grid description: Manage LSP28 The Grid on LUKSO Universal Profiles. Create, update, and manage grid layouts with mini-apps, iframes, and external links. Use when working with Universal Profile grids, LSP28 data encoding, VerifiableURI format, or The Grid feature on LUKSO.

LSP28 The Grid Skill

Manage LSP28 The Grid on Universal Profiles. Create grid layouts with mini-apps, iframes, and external links.

Quick Start

1. Configure Environment

Set these environment variables or edit the scripts:

export UP_PRIVATE_KEY="your_controller_private_key"
export UP_ADDRESS="your_universal_profile_address"
export KEY_MANAGER="your_key_manager_address"

2. Update Grid Layout

const { ethers } = require('ethers');

// Grid data structure
const gridData = {
  isEditable: true,
  items: [
    {
      type: 'miniapp',
      id: 'app1',
      title: 'My App',
      backgroundColor: '#1a1a2e',
      textColor: '#ffffff',
      text: 'Click me'
    },
    {
      type: 'iframe',
      src: 'https://example.com/embed',
      id: 'frame1',
      title: 'External Content'
    },
    {
      type: 'external',
      url: 'https://example.com',
      id: 'link1',
      title: 'Visit Site'
    }
  ]
};

// Encode as VerifiableURI
const jsonString = JSON.stringify(gridData);
const base64Data = Buffer.from(jsonString).toString('base64');
const verifiableUri = `data:application/json;base64,${base64Data}`;

3. Execute Transaction

// LSP28 Grid data key
const LSP28_GRID_KEY = '0x31cf14955c5b0052c1491ec06644438ec7c14454be5eb6cb9ce4e4edef647423';

// Minimal ABIs
const LSP0_ABI = ['function setData(bytes32 dataKey, bytes dataValue) external'];
const LSP6_ABI = ['function execute(bytes calldata payload) external payable returns (bytes memory)'];

// Setup provider and wallet
const provider = new ethers.JsonRpcProvider('https://rpc.mainnet.lukso.network');
const wallet = new ethers.Wallet(process.env.UP_PRIVATE_KEY, provider);

// Encode setData call on UP
const upInterface = new ethers.Interface(LSP0_ABI);
const executeData = upInterface.encodeFunctionData('setData', [
  LSP28_GRID_KEY,
  ethers.toUtf8Bytes(verifiableUri)
]);

// Send via KeyManager
const keyManager = new ethers.Contract(process.env.KEY_MANAGER, LSP6_ABI, wallet);
const tx = await keyManager.execute(executeData);
const receipt = await tx.wait();
console.log('Grid updated in block:', receipt.blockNumber);

Data Structure Reference

Grid Item Types

Mini-App (type: 'miniapp')

{
  type: 'miniapp',
  id: 'unique-id',          // Required: unique identifier
  title: 'App Title',       // Required: display title
  text: 'Button text',      // Required: button label
  backgroundColor: '#fe005b',  // Required: hex color
  textColor: '#ffffff',     // Required: hex color for text
  size: 'medium'            // Optional: 'small', 'medium', 'large'
}

IFrame (type: 'iframe')

{
  type: 'iframe',
  id: 'unique-id',          // Required: unique identifier
  title: 'Frame Title',     // Required: display title
  src: 'https://example.com/embed'  // Required: iframe URL
}

External Link (type: 'external')

{
  type: 'external',
  id: 'unique-id',          // Required: unique identifier
  title: 'Link Title',      // Required: display title
  url: 'https://example.com'  // Required: external URL
}

Full Grid Structure

{
  isEditable: true,  // Boolean: allows editing
  items: [
    // Array of grid items (see types above)
  ]
}

Important Constants

Constant	Value	Description
LSP28_GRID_KEY	0x31cf14955c5b0052c1491ec06644438ec7c14454be5eb6cb9ce4e4edef647423	Data key for grid storage
Chain ID	42	LUKSO Mainnet
RPC URL	https://rpc.mainnet.lukso.network	Public RPC endpoint

Color Contrast Requirements

Ensure text is readable on background colors:

Background	Text Color	Result
#1a1a2e (dark)	#ffffff (white)	Good contrast
#ffffff (white)	#000000 (black)	Good contrast
#fe005b (pink)	#ffffff (white)	Good contrast
#000000 (black)	#fe005b (pink)	Good contrast

Common Mistakes

❌ Wrong property names:

// WRONG:
{ color: '#fe005b', content: 'Click me' }

// CORRECT:
{ backgroundColor: '#fe005b', text: 'Click me' }

❌ Missing required fields:

• All items need: type, id, title
• Mini-apps additionally need: text, backgroundColor, textColor

❌ Wrong encoding:

// WRONG - toUtf8String instead of toUtf8Bytes:
setData(key, ethers.toUtf8String(uri))

// CORRECT:
setData(key, ethers.toUtf8Bytes(uri))

Transaction Flow

Controller Key 
    ↓
KeyManager.execute(payload)
    ↓
UP.setData(LSP28_GRID_KEY, verifiableUri)
    ↓
Grid updated on-chain

CLI Usage

Use the provided script:

# Use example grid
node scripts/update-grid.js --example

# Load from JSON file
node scripts/update-grid.js --file my-grid.json

References

• references/lsp28-spec.md - Full LSP28 specification
• scripts/update-grid.js - Complete working example
• LSP28 Standard: https://github.com/lukso-network/LIPs/blob/main/LSPs/LSP-28-TheGrid.md