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Solidity Support

Arbitrum Rollup supports EVM transactions, and therefore allows you to trustlessly deploy Solidity contracts (as well as Vyper or any other language that compile to EVM). Arbitrum supports almost all Solidity code as expected with a few exceptions that we detail below.

Differences from Solidity on Ethereum

Although Arbitrum supports Solidity code, there are differences in the effects of a few operations, including language features that don't make much sense in the Layer 2 context.

• tx.gasprice will return 1
• blockhash(x) will always return zero
• block.coinbase will return zero
• block.difficulty will return the constant 2500000000000000
• block.gaslimit will return the constant 10000000000
• gasleft will return the amount of ArbGas remaining

Time

Arbitrum supports block.number and block.timestamp. For the semantics of these features in the Arbitrum context, please see Time in Arbitrum.