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p256-verifier-huff's Introduction

P256 Curve Verifier Huff implementation

Secp256r1 (a.k.a p256) curve signature verifier rewritten and optimized in Huff Language. This was greatly inspired by dcposch's and nalinbhardwaj's implementation here and pcaversaccio's Vyper implementation here. Also, for more technical details, please refer to EIP-7212.

This is experimental software and is provided on an "as is" and "as available" basis. We do not give any warranties and will not be liable for any losses incurred through any use of this code base.

Gas Benchmark

Implementation Min gas Avg gas Max gas
Huff P256 Verifier 228,475 239,164 249,574
Daimo Solidity P256 Verifier 319,943 333,892 347,505
FCL Solidity P256 Verifier 362,028 378,868 394,931

Actions

To regenerate test vectors:

cd test-vectors
npm i

# Download, extract, clean test vectors
# This regenerates ../test/vectors.jsonl
npm run generate_wycheproof

# Validate that all vectors produce expected results with SubtleCrypto and noble library implementation
npm test

# Validate that all vectors also work with EIP-7212
# Test the fallback contract...
cd ..
forge test -vvv

# In future, execution spec and clients can test against the same clean vectors

Further References

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