ETH Price: $3,229.85 (-0.86%)

Gas: 23.972 Gwei

/

What can Site Settings be Used For?

Using the Optimized Search Bar

What are Public Name Tags and Labels?

What are Etherscan Cards?

All Knowledge Base articles

Site Settings

Ethereum Mainnet
Beaconscan ETH2
Sepolia Testnet
Holesky Testnet

Sign In

Home
Blockchain
Tokens
- Top Tokens (ERC-20)
- Token Transfers (ERC-20)
NFTs
Resources
Developers
More
Tools & Services

Discover more of Etherscan's tools and services in one place.

Sponsored
Tools
Explore
Services
Explorers
Appearance & Settings
|
Sign In

Solidity UML Diagram

For 0x3991ee3fae8c770615d72103f07a8a66bd04157b

Click on Image to Zoom in

Credits: UML diagram generated with SOL2UML

Before You Copy

Don't show this for 30 days

Transaction Private Note

Transaction Hash

Private Note Description

Please DO NOT store any passwords or private keys here. A private note (up to 100 characters) can be saved and is useful for transaction tracking.

View All Transactions Private Notes

Back to Top

Powered by Ethereum

Etherscan is a Block Explorer and Analytics Platform for Ethereum, a decentralized smart contracts platform.

Company

About Us
Brand Assets
Contact Us
Careers We're Hiring!
Terms & Privacy
Bug Bounty

Community

API Documentation
Knowledge Base
Network Status
Newsletters

Products & Services

Advertise
Explorer as a Service (EaaS)
API Plans
Priority Support
Blockscan
Blockscan Chat

Etherscan © 2025 (C)

Donations: 0x71c765...d8976f

This website uses cookies to improve your experience. By continuing to use this website, you agree to its Terms and Privacy Policy.