🖋️Kai-Sign

Welcome to Kai-Sign, the decentralized platform for creating, verifying, and distributing ERC7730 metadata for blockchain clear signing. Transform cryptic transaction bytecode into human-readable information that users can understand and verify.

What is Kai-Sign?

Kai-Sign enables clear signing for blockchain transactions by providing:

• Visual ERC7730 Builder - Create metadata with drag-and-drop interface

• Hardware Wallet Preview - Test how transactions display on Ledger devices

• Community Verification - Decentralized validation using Reality.eth oracles

Quick Links

Resource	Description
Quickstart	Create your first metadata in 15 minutes
Core Concepts	Understand ERC7730 and clear signing
Builder Tool	Start creating metadata now

The Problem: Blind Signing

When you approve blockchain transactions, you typically see cryptic bytecode:

0xa9059cbb000000000000000000000000a1371748d65baef4509a3c067b3fe3a1b79183ae000000000000000000000000000000000000000000000000000000001f143c37

This forces users to blind sign transactions, creating security vulnerabilities and poor user experiences.

The Solution: Clear Signing

Kai-Sign transforms that bytecode into clear, verifiable information:

Transfer Tokens
├─ To: vitalik.eth (0xa137...83ae)
├─ Amount: 521.99 USDC
└─ Network: Ethereum Mainnet

How It Works

1. Create Metadata

Use our visual builder to map contract functions to human-readable descriptions following the ERC7730 standard.

2. Community Verification

Submit metadata to Reality.eth for decentralized verification with economic incentives for accuracy.

3. Hardware Integration

Verified metadata automatically works with supported hardware wallets for secure clear signing.

Architecture

Kai-Sign consists of several integrated components:

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   Frontend      │    │   Backend API   │    │  Blockchain     │
│   (Next.js)     │◄──►│   (FastAPI)     │◄──►│  (Ethereum)     │
└─────────────────┘    └─────────────────┘    └─────────────────┘
         │                       │                       │
         ▼                       ▼                       ▼
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│ Hardware Wallet │    │   Subgraph      │    │   Blob          │
│   Integration   │    │   (The Graph)   │    │   Storage       │
└─────────────────┘    └─────────────────┘    └─────────────────┘

• Frontend: Visual metadata builder and hardware wallet simulator

• Backend: API services and blockchain integration

• Smart Contracts: On-chain metadata registry and verification

• Verification: Reality.eth oracles with Kleros arbitration

• Storage: Decentralized metadata storage

Getting Started

For Developers

1. Installation Guide - Set up the development environment

2. Quickstart Tutorial - Create your first metadata

3. Core Concepts - Learn ERC7730 fundamentals

4. API Documentation - Integrate with Kai-Sign services

For Users

1. Build Metadata - Create clear signing specs

2. Verify Metadata - Submit for community verification

3. Hardware Integration - Test with hardware wallets

Key Features

🛠️ ERC7730 Builder

• Visual interface for creating metadata

🔐 Decentralized Verification

• Economic incentives for accurate verification

🌐 Decentralized Storage

• Ethereum blob transactions for large files

License

This project is licensed under the Apache License 2.0.

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Ready to start? Follow our Quickstart Guide to create your first ERC7730 metadata in 15 minutes.