cchecksum
An ~18x faster drop-in replacement for eth_utils.to_checksum_address. Raises the exact same Exceptions. Implemented in C.
Decision gist · record as of 2026-08-14
Yes, if you use Ethereum address checksum validation in a performance-sensitive context. The identical API and exception behavior make it a true drop-in replacement with no code changes required. Active maintenance, no vulnerabilities, and broad platform coverage make it low-risk. Install if the stated speedup justifies the medium wheel-installation friction on your target platforms.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires CPython 3.9 or later; wheels are pre-built for common architectures but installation may require a C compiler on unsupported platforms.
- Medium install friction due to compiled wheels, but well-covered across Python 3.9–3.14 and major platforms.
- Active maintenance with recent release (35 days old) and no known vulnerabilities.
License · maintenance · safety
MIT (permissive) — MIT license is permissive; you can use, modify, and distribute this package freely in both open-source and commercial projects with minimal restrictions.
last release 2026-07-10 (35 days) · last repo commit 2026-07-29 · 4 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 287,605 downloads/mo, #8,031 on PyPI
Alternatives
Verify before relying
pip install cchecksum
from cchecksum import to_checksum_address
checksum = to_checksum_address('0xexampleaddress')- Whether the package handles all edge cases and error conditions identically to eth_utils.to_checksum_address beyond the stated API match.
- Performance improvement magnitude (stated as ~18x) under real-world workloads and dataset sizes.
What it is and what it does
CChecksum is a performance-focused alternative to Ethereum address checksum validation. It wraps the CPU-intensive checksum computation in C code, delivering roughly 18x faster execution while keeping the same function signature, return values, and exception behavior. The package is designed as a drop-in replacement: you install it, import from cchecksum instead of eth_utils, and your existing code runs faster without modification.
The package depends on eth-hash, eth-typing, pysha3, and safe-pysha3 for cryptographic operations and type definitions. It targets CPython 3.9 through 3.14 and ships pre-compiled wheels for multiple architectures, reducing installation friction on standard platforms. With no known vulnerabilities and active maintenance, it is suitable for production use in Ethereum tooling and applications where address validation throughput matters.
Use it for
- Accelerate bulk Ethereum address validation in data pipelines or batch processing tasks.
- Drop-in replacement in existing code to gain performance without refactoring.
- High-throughput blockchain indexing or transaction monitoring systems that validate many addresses.
- Reduce CPU overhead in API services that perform frequent address checksum validation.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you use Ethereum address checksum validation in a performance-sensitive context.
The identical API and exception behavior make it a true drop-in replacement with no code changes required. Active maintenance, no vulnerabilities, and broad platform coverage make it low-risk. Install if the stated speedup justifies the medium wheel-installation friction on your target platforms.
Install
cchecksum on PyPI
Before you install
Medium install friction due to compiled wheels, but well-covered across Python 3.9–3.14 and major platforms. Active maintenance with recent release (35 days old) and no known vulnerabilities.
Requires CPython 3.9 or later; wheels are pre-built for common architectures but installation may require a C compiler on unsupported platforms.
License in practice
MIT license is permissive; you can use, modify, and distribute this package freely in both open-source and commercial projects with minimal restrictions.
Quickstart
pip install cchecksum
from cchecksum import to_checksum_address
checksum = to_checksum_address('0xexampleaddress')Verify before relying
- Whether the package handles all edge cases and error conditions identically to eth_utils.to_checksum_address beyond the stated API match.
- Performance improvement magnitude (stated as ~18x) under real-world workloads and dataset sizes.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release <4,>=3.9 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | 4 packageseth-hasheth-typingpysha3safe-pysha3 |
| Maintenance | Actively maintained 35 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 287,605 / month, #8,031 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Intended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: CPythonTopic :: Software Development :: Libraries |
Evidence: cchecksum-0.4.5-cp310-cp310-macosx_10_9_x86_64.whl; cchecksum-0.4.5-cp310-cp310-macosx_11_0_arm64.whl; cchecksum-0.4.5-cp310-cp310-manylinux1_i686.manylinux_2_28_i686.manylinux_2_5_i686.whl; cchecksum-0.4.5-cp310-cp310-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; cchecksum-0.4.5-cp310-cp310-manylinux2014_armv7l.manylinux_2_17_armv7l.manylinux_2_31_armv7l.whl; cchecksum-0.4.5-cp310-cp310-manylinux2014_ppc64le.manylinux_2_17_ppc64le.manylinux_2_28_ppc64le.whl; cchecksum-0.4.5-cp310-cp310-manylinux2014_s390x.manylinux_2_17_s390x.manylinux_2_28_s390x.whl; cchecksum-0.4.5-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; cchecksum-0.4.5-cp310-cp310-manylinux_2_31_riscv64.manylinux_2_39_riscv64.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_aarch64.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_armv7l.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_i686.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_ppc64le.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_riscv64.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_s390x.whl; cchecksum-0.4.5-cp310-cp310-musllinux_1_2_x86_64.whl; cchecksum-0.4.5-cp310-cp310-win32.whl; cchecksum-0.4.5-cp310-cp310-win_amd64.whl; cchecksum-0.4.5-cp310-cp310-win_arm64.whl; cchecksum-0.4.5-cp311-cp311-macosx_10_9_x86_64.whl
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See also faster-eth-utils · faster-eth-abi · bech32m · eth-keys · crccheck · ethereum-dasm · eth-keyfile · ckzg · fastcrc · eth-tester