EVM Behavior

Signet is the most EVM-compatible rollup. This page describes the (very few) differences between Signet and Ethereum Mainnet EVM behavior.

USD Native Asset

The native asset on Signet is USD. USD has 18 decimals, like ETH on Ethereum Mainnet. See the Passage contract for more information on how USD is minted.

Inherited header values

The following opcodes inherit the values of the Ethereum block:

• PREVRANDAO — block.difficulty and block.prevrandao
• TIMESTAMP — block.timestamp

Disabled Opcodes

The following opcodes are disabled in Signet:

• BLOBHASH — EIP-4844 is not supported.
• BLOBBASEFEE — EIP-4844 is not supported.

Precompiles

Signet supports the same precompiles as ethereum, plus the following additional precompile:

• secp256r1 signature verification as specified in RIP-7212 at address 0x100.

Address Aliasing

To conform to common rollup conventions, Signet uses address aliasing for L1-to-L2 messages. When a contract on L1 sends a message to Signet via the Transactor contract, the sender’s address is modified by adding a constant offset to it. This ensures that contracts on Signet can distinguish between messages sent from L1 and those sent from the same address on the L2.

The address aliasing offset is 0x1111000000000000000000000000000000001111. Aliasing is performed by converting the address to a number, adding the offset, and then converting back to an address.

Signet differs from other rollup behaviors in that the addresses of ephemeral contracts are NOT aliased. Signet treats ephemeral L1 contracts equivalently to EOAs.