Module sign 

Signing primitives: keccak, msgpack, EIP-712, L1 actions and user-signed actions.

Re-exports

pub use eip712::Domain;

pub use eip712::Field;

pub use eip712::TypedStruct;

pub use eip712::digest;

pub use eip712::digest_of_wallet_json;

pub use keccak::keccak256;

pub use l1::L1Action;

pub use l1::connection_id;

pub use l1::l1_digest;

pub use l1::phantom_agent;

pub use msgpack::Map;

pub use msgpack::Value;

pub use user_signed::NonceKey;

pub use user_signed::UserAction;

pub use user_signed::UserSigned;

Modules

eip712

EIP-712 for the flat structs Hyperliquid signs, and HyperEVM contracts that take the same kind (one level, uint256[] the only array): hashing, and the typed data a browser wallet’s eth_signTypedData_v4 is handed.

keccak

Keccak-256, the Ethereum hash: pad byte 0x01, not SHA3’s 0x06.

l1

L1 actions: msgpack, hashed into a connection id, signed as a phantom agent Agent{source, connectionId} under Exchange/1/1337/0x0. The source is "a" on mainnet and "b" on testnet; the hash has no network.

msgpack

Msgpack as the venue hashes an L1 action: map keys in insertion order, never sorted, and a non-negative integer always unsigned.

user_signed

User-signed actions: EIP-712 typed data signed by the account’s own wallet (never an agent) under HyperliquidSignTransaction/1/<chain>/0x0, the chain being the network’s signature chain (42161 on mainnet, 421614 on testnet).