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Phase 2 of the Airdrop is officially live!
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Arbitrum

Scaling Ethereum

 * Twitter
 * Discord
 * Blog
 * Ecosystem Job Board


ARBITRUM


ARBITRUM AIRDROP IS LIVE

ARBITRUM AIRDROP CLAIMING IS NOW AVAILABLE FOR WALLETS MEET THE REQUIREMENTS.

CHECK ELIGIBILITY


ARBITRUM AIRDROP IS LIVE

ARBITRUM AIRDROP CLAIMING IS NOW AVAILABLE FOR WALLETS MEET THE REQUIREMENTS.

YOU CAN CLAIM: 0 ARB

CONNECTED WALLET: 0X000...0000

CLAIM TOKENS



TOTAL VALUE LOCKED


$5.97B

Updated July 18, 2023


ROLLUP MARKET SHARE


59.98%

Updated July 18, 2023


TOTAL USERS


9.4M+

Updated July 18, 2023


ETH GAS SAVED


$2.36B

Updated July 18, 2023


ARBITRUM NITRO




ACCELERATE YOUR BUSINESS WITH NITRO

Arbitrum One and Nova are powered by Nitro, our proprietary blockchain
network-powered technology stack. Nitro’s next-generation rollup architecture
provides 7x more throughput than Ethereum and lower fees without sacrificing any
security.



DISCOVER ALL THE DAPPS, WALLETS, AND TOOLS THAT MAKE THE ARBITRUM ONE ECOSYSTEM
THE HOME OF DEFI.

EXPLORE ONE DAPPS

DIVE INTO WEB3 SOCIAL AND GAMING WITH ARBITRUM NOVA, HOME TO REDDIT’S COMMUNITY
POINTS AND THE NEXT GENERATION OF GAMERS.

EXPLORE NOVA DAPPS

PRYSM IS AN OFFICIAL ETHEREUM PROOF-OF-STAKE CLIENT WRITTEN IN GO. RUN A NODE OR
EARN REWARDS BY RUNNING A VALIDATOR.

READ THE DOCS



STYLUS: THE EVM+ EQUIVALENCE

Upcoming Stylus will enable users to deploy programs written in popular
programming languages like Rust, C, C++, and more, side-by-side with existing
Solidity dApps on the same Arbitrum blockchain.

LEARN MORE



THE LIFECYCLE OF AN ARBITRUM TRANSACTION




01


SEND YOUR TRANSACTION

LEARN ABOUT THE SEQUENCER

Client software can do remote procedure calls (RPCs) to an Arbitrum node, using
the standard Ethereum API, to interact with an Arbitrum chain. Nodes will
forward your transactions to the Arbitrum Sequencer, which will report
transaction results just as an Ethereum node would–but much faster, typically
around one second.


02


SEQUENCER POSTS TRANSACTION BATCH TO ETHEREUM

LEARN ABOUT FINALITY

All Arbitrum transactions are posted on the Ethereum blockchain, guaranteeing
that all of the underlying data is available to users. Once a transaction has
reached finality on Ethereum, it is considered final and can no longer be
replaced or re-reordered. At this point the result of the transaction is fully
determined.


03


VALIDATORS PROCESS TRANSACTIONS AND POST ASSERTION

LEARN ABOUT ASSERTION

What is an assertion? Although transaction data is posted on the Ethereum
blockchain, transaction execution is moved off-chain and performed by Arbitrum
validators. Arbitrum validators report back their results of this off-chain
processing in the form of an assertion, sometimes referred to as a rollup block.
The assertion is posted on Ethereum optimistically, meaning a proof is only
attached. Validators post a stake, which they will lose if they’re caught trying
to be deceptive. This ensures that validators have an incentive not to try
anything dishonest.


04


ASSERTION IS CHECKED; FRAUD PROOF IF WRONG

LEARN ABOUT FRAUD PROOFS

Once an assertion is posted, a challenge window opens up during which any
validator can challenge that assertion. Assertion is checked; fraud proof if
wrong. Validators that successfully prove fraud will receive a large reward. A
validator who is caught cheating will lose a large deposit, which becomes the
reward. Crucially, it only takes one honest validator to guarantee correct
execution.


05


ASSERTION IS CONFIRMED

LEARN ABOUT CONFIRMATION

In the unlikely event of a fraud attempt, once the challenge is resolved and the
correct outcome determined, the correct assertion is confirmed and accepted by
Ethereum. Arbitrum is guaranteed to prevent fraud as long as there is one honest
validator. Withdrawals from Arbitrum require confirmation, but Arbitrum supports
pipelining so the chains continues to execute and make progress even while
assertions are awaiting confirmation.






FOUNDERS

Prior to the birth of Ethereum, Ed Felten began his extensive research in
roll-up technology in 2014. After serving in the White House as President
Obama’s Deputy CTO, he returned to Princeton University to resume his research
with Steven Goldfeder and Harry Kalodner, two PhD students at the time.


ED FELTEN

Co-Founder & Chief Scientist


STEVEN GOLDFEDER

Co-Founder & CEO


HARRY KALODNER

Co-Founder & CTO

OFFCHAIN LABS WEBSITE


ARBITRUM NEWS

The latest news coverage, podcasts episodes, upcoming events, and more.


 * EVENTS
 * PODCASTS
 * BLOG

EVENTS

ART BASEL

ETH INDIA

DEVCONNECT

ETH NEW YORK

MAINNET

PERMISSIONLESS

SMART CONTRACT SUMMIT

STANFORD BLOCKCHAIN WEEK

ETH CC

DEVCON

ETH DENVER

NFT NYC

HARVARD BLOCKCHAIN CONFERENCE

SAN FRANCISCO BLOCKCHAIN WEEK

SOUTHERN CALIFORNIA BLOCKCHAIN CONFERENCE

QUANTUM MIAMI

PODCASTS

ALT ASSET ALLOCATION

BLOCKWORKS EMPIRE

DEFI BY DESIGN

QUANTLAYER

THE CRYPTO CONVERSATION

UNCHAINED

WEB3 ACADEMY

ZERO KNOWLEDGE

THE DELPHI PODCAST

THE FINTECH BLUEPRINT

THE BLUEBERRY PODCAST

WOLF OF ALL STREETS

WEB3 FRONTIER

BANKLESS

BLOCMATES

EPICENTER

ON THE BRINK

GRTIQ

BASE LAYER

BLOCKCRUNCH

CRYPTO UNSTACKED

CRYPTO 101

MASTERS OF WEB3

SIGNAL

THE BLOCKCHAIN DEBATE

THE DEFIANT

BLOG


STORIES BY OFFCHAIN LABS ON MEDIUM

 * Stylus in Action: Lifecycle of a Stylus Contract May 24, 2023
 * Post-Mortem Report: Ethereum Mainnet Finality (05/11/2023) May 18, 2023
 * Prysm Updates Q2'23 May 11, 2023
 * Validator Performance Tracking April 19, 2023
 * Deposits Locked, Withdrawals Minted March 30, 2023
 * Time boost: a new transaction ordering policy for Arbitrum March 1, 2023
 * Arbinauts! We’re heading to ETH Denver! March 1, 2023
 * Efficient and Robust Rollup Batch Posting Strategy February 21, 2023
 * Prysm Updates Q1’23 February 9, 2023
 * Hello, Stylus February 7, 2023





CURRENT PROGRAMS

We have partnered with Immunefi to launch a $2M bug bounty for Arbitrum.

LEARN MORE





CAREERS

Our mission is to make blockchain better. Apply below or check out opportunities
in the Arbitrum ecosystem.

APPLY TODAY
ECOSYSTEM JOB BOARD



DEVELOPERS

QUICKSTART

GITHUB

RESEARCH

BLOG

ARBITRUM

BRIDGE INTO ARBITRUM

PARTNERSHIP INQUIRIES

EXPLORE ONE DAPPS



EXPLORE NOVA DAPPS

GENERAL

MEDIA KIT

CAREERS

ARBITRUM FOUNDATION

OFFCHAIN LABS

TERMS OF SERVICE





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