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Implement secp256k1 point decompression #19

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Description

@ch4r10t33r

Description

Add public key point decompression for compressed secp256k1 points.

Location

  • File: src/crypto/secp256k1.zig
  • Line: 103

Current Status

Compression implemented, decompression not.

Tasks

  • Implement point decompression algorithm
  • Support 0x02 prefix (even y)
  • Support 0x03 prefix (odd y)
  • Add test vectors
  • Validate correctness

Priority

Low - Not commonly needed

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