eip712

library0.3.3pypypi✓ verified 89d ago

Message classes for typed structured data hashing and signing in Ethereum, based on EIP-712. Current version 0.3.3, requires Python >=3.10, <4. Maintained actively by ApeWorX.

auth-security serialization

pip install eip712

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · EIP712

eip712

auth-securitypythonv0.3.3

Install

6.5s avg

Import

1261ms

Disk

60MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v0.3.3 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 1.292s · 58.8MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 6.5s · import 1.230s · 62MB

60MB installed

● package 60MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

EIP712Message

✓ from eip712 import EIP712Message

Correct import for the main message class.

EIP712Type

✓ from eip712 import EIP712Type

✗ from eip712.messages import EIP712Type

EIP712Type is exported from top-level eip712 since v0.3.0.

EIP712Domain

✓ from eip712 import EIP712Domain

✗ from eip712.domain import EIP712Domain

EIP712Domain is now directly available from eip712.

Define EIP-712 message structures using pydantic-based classes and generate the structured data for signing.

from eip712 import EIP712Message, EIP712Domain class Person(EIP712Message): name: str wallet: str class Mail(EIP712Message): from_: Person = Person(name='Alice', wallet='0x...') # field alias to: Person contents: str message = Mail( from_=Person(name='Alice', wallet='0x...'), to=Person(name='Bob', wallet='0x...'), contents='Hello!' ) print(message.to_message()) print(message.encode_712()) print(message.signable_message())

Debug

Known issues

breakingv0.3.0 replaced dataclassy with pydantic. If you subclasses EIP712Message directly, you need to adapt to pydantic behavior (e.g., field aliases, validation).

fix

Ensure you use pydantic field types and aliases instead of dataclassy patterns.

affects: >=0.3.0

breakingIn v0.3.0, EIP712Type was removed as a separate class. Inner types should be plain pydantic models or Python types.

fix

Remove EIP712Type subclass usage; define nested types as pydantic models directly.

affects: >=0.3.0

gotchaField names that conflict with Python keywords (e.g., 'from') must use pydantic aliasing with Field(alias=...).

fix

Use from eip712 import EIP712Message, Field; then define from_: str = Field(alias='from')

affects: >=0.3.0

deprecatedString type annotations like 'uint256' are deprecated; use pydantic numeric types (e.g., int, float) or custom validators.

fix

Replace 'uint256' with int and add pydantic validators if needed.

affects: >=0.3.0

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'eip712'

Library not installed.

fix

Run 'pip install eip712'

ImportError: cannot import name 'EIP712Type' from 'eip712'

EIP712Type was removed in version 0.3.0.

fix

Use pydantic models instead; or upgrade to a version <0.3.0 if you must use EIP712Type.

ValidationError: 1 validation error for Mail from_ field required

Field name 'from_' is used but pydantic treats it as a field name; likely missing alias.

fix

Define the field with an alias: from_: Person = Field(alias='from')

AttributeError: 'EIP712Message' object has no attribute 'to_message'

Method 'to_message' may not exist in older versions.

fix

Use 'encode_712()' or 'signable_message()' depending on needs. Check docstrings.

Upgrade

Version history

0.3.3latest on PyPI · released Dec 23, 2025

Audit

Dependencies

pydanticoptionalEIP712Message subclasses pydantic.BaseModel.

eth-accountoptionalUsed for signing and hash computation.

Agent activity

26 hits · last 30 days

node

Anthropic

OpenAI (training)

Resources

githubhttps://github.com/ApeWorX/eip712 ↗

packagehttps://pypi.org/project/eip712/ ↗

homepagehttps://apeworx.io ↗