Mainnet Live

The Future ofDigital Currency

SUM Chain is a high-performance Layer-1 blockchain powering Koppa (Ϙ) — the native currency designed for instant, global peer-to-peer transactions.

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View Explorer
3s
Block Time
~0.001 Ϙ
Transaction Fee
800B Ϙ
Total Supply
Instant
Finality
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Why SUM Chain

Built for the Next Generation

SUM Chain combines cutting-edge technology with practical design to deliver a blockchain that's actually usable for everyday transactions.

Lightning Fast

3-second block times with instant finality. Your transactions confirm in the time it takes to blink.

Near-Zero Fees

Transaction fees of ~0.001 Ϙ mean you can send any amount without worrying about costs eating into your transfer.

Battle-Tested Security

Ed25519 signatures, Blake3 hashing, and BFT consensus provide enterprise-grade security without compromise.

Global Scale

800 billion Koppa total supply means ~100 Ϙ per person on Earth. Designed for worldwide adoption.

Pure Rust

Built entirely in Rust with zero C/C++ dependencies. Memory-safe, blazing fast, and auditable.

Decentralized

Proof of Authority consensus with a growing validator set ensures true decentralization and censorship resistance.

Technology

Powered by Pure Rust

SUM Chain is built entirely in Rust using only the stable toolchain. No C/C++, Python, Go, JavaScript, or Solidity. Just pure, memory-safe Rust that's auditable, maintainable, and blazing fast.

transfer.rs
// Send 10.5 Koppa with minimal fee
let tx = Transaction::new(
    chain_id,
    sender.address(),
    recipient,
    koppa_to_base("10.5"),  // 10.5 Ϙ
    koppa_to_base("0.001"), // Fee: 0.001 Ϙ
    nonce,
);

let signed = tx.sign(&sender)?;
node.broadcast(signed).await?;
Cryptography

Ed25519

Elliptic curve signatures

Cryptography

Blake3

Lightning-fast hashing

Network

libp2p

Peer-to-peer networking

Network

Gossipsub

Message propagation

Consensus

BFT Consensus

Byzantine fault tolerance

Storage

RocksDB

High-performance storage

100%
Rust
0
C/C++ deps
9
Decimals
Ecosystem

Everything You Need to Get Started

A complete suite of tools and resources for users, developers, and validators.

Live

Block Explorer

Track transactions, blocks, and addresses in real-time with our intuitive explorer.

Learn more
Live

TypeScript SDK

Build dApps with our fully-typed SDK. Query balances, send transactions, and more.

Learn more
Live

CLI Wallet

Secure command-line wallet for power users. Generate keys, sign, and broadcast transactions.

Learn more
Coming Soon

Web Wallet

Easy-to-use browser wallet for sending and receiving Koppa. No downloads required.

Coming Soon

Mobile App

Native iOS and Android apps for managing your Koppa on the go.

Live

Documentation

Comprehensive guides for users, developers, and validators.

Learn more
Get Started

Ready to Join the Future?

Start Using Koppa

1

Get the CLI Wallet

# Download and install
curl -sSL https://sum-chain.xyz/install.sh | bash

# Or build from source
git clone https://github.com/anthropics/sum-chain
cd sum-chain && cargo build --release
2

Create Your Wallet

# Generate a new keypair
sumchain keygen --output my-wallet.json

# Your address will be displayed
# Keep your wallet file safe!
3

Receive & Send Koppa

# Check your balance
sumchain-wallet balance --key my-wallet.json

# Send Koppa to another address
sumchain-wallet transfer \
  --key my-wallet.json \
  --to RECIPIENT_ADDRESS \
  --amount 10.5
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