domain_separator

Compute Seismic EIP-712 domain separator

Compute the EIP-712 domain separator for Seismic transactions.

Signature

def domain_separator(chain_id: int) -> bytes

Parameters

Parameter	Type	Required	Description
chain_id	int	Yes	Numeric chain identifier

Returns

Type	Description
bytes	32-byte keccak256 hash

How it works

keccak256(
    typeHash(EIP712Domain)
    ‖ keccak256("Seismic Transaction")
    ‖ keccak256("2")
    ‖ abi.encode(uint256, chainId)
    ‖ abi.encode(address, 0x0…0)
)

Domain constants

• name = "Seismic Transaction"

• version = str(TYPED_DATA_MESSAGE_VERSION) (currently "2")

• verifyingContract = 0x0000000000000000000000000000000000000000 (signing is off-chain)

Example

from seismic_web3 import domain_separator

d = domain_separator(5124)
print(d.hex())

See Also

• eip712_signing_hash — uses domain separator

• struct_hash — the other component of the signing hash

• build_seismic_typed_data — includes domain in typed data