eip712_signing_hash

Compute final EIP-712 signing digest for TxSeismic

Compute the digest signed in EIP-712 mode.

Signature

def eip712_signing_hash(tx: UnsignedSeismicTx) -> bytes

Parameters

Parameter	Type	Required	Description
tx	UnsignedSeismicTx	Yes	The unsigned Seismic transaction

Returns

Type	Description
bytes	32-byte keccak256 digest to be ECDSA-signed

How it works

keccak256("\x19\x01" ‖ domainSeparator ‖ structHash)

Where:

• \x19\x01 — EIP-712 magic bytes

• domainSeparator — from domain_separator(chain_id)

• structHash — from struct_hash(tx)

Example

digest = eip712_signing_hash(unsigned_tx)
print(len(digest))  # 32

See Also

• sign_seismic_tx_eip712 — uses this hash to sign

• domain_separator — computes domain separator

• struct_hash — computes struct hash

• build_seismic_typed_data — build full typed data