What is Arbitrum (ARB)?
When Ethereum's mainnet gets crowded, transaction costs rise and confirmations slow down. Arbitrum (ARB) is a Layer-2 network built to reduce that pressure by handling transactions off-chain. Its native token, ARB, gives the community a direct voice in how the network evolves.
How does Arbitrum group transactions?
Arbitrum relies on optimistic rollup technology. Rather than processing each transaction individually on Ethereum, it bundles hundreds of them off-chain, compresses the results into a single summary, and posts that summary to the mainnet. Batching the data in this way spreads the cost across many users and keeps fees low.
The optimistic part of the design means the network assumes transactions are valid unless challenged. Anyone can dispute a summary during a fixed time window by submitting proof to Ethereum. If the challenge succeeds, the incorrect batch is rolled back and the dishonest party loses funds. This keeps Arbitrum aligned with Ethereum's security without duplicating every computation on Layer-1.
What role does the ARB token play in governance?
ARB is strictly a governance token; it is not required for paying gas fees on the network. Holders vote through the Arbitrum DAO on protocol upgrades, treasury allocations, and security council elections. This separates day-to-day costs from long-term decision-making power.
A significant portion of the total supply sits in the DAO treasury, while the rest is allocated to the team and investors. Annual token minting is capped at 2%. ARB lives natively on Arbitrum One and can move to Ethereum or Solana through bridges.
What makes Arbitrum attractive for developers?
Arbitrum is fully compatible with the Ethereum Virtual Machine (EVM), so existing smart contracts can migrate without code changes. Its Stylus component goes further by allowing developers to write smart contracts in Rust and C++, opening the network to teams that prefer working outside the Solidity ecosystem.
