✨ implement isOnCurve function

[qd-qd]

This function checks if a point is on the p256r1 curve.

[github-actions]

Changes to gas cost

Generated at commit: 5e7cb6c6b3d0ebf4b63e33e70a143e7a398fd769, compared to commit: d6e84c7340b6109ae3de0069892b64108a9c73fc

🧾 Summary (20% most significant diffs)

Contract	Method	Avg (+/-)	%
ImplementationECDSA	affAdd	+21,612 ❌	+3958.24%
ImplementationCurve	pModInv	+21,204 ❌	+1111.32%

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Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
ImplementationECDSA	630,951 (+87,376)	affAdd zz2Aff	22,147 (+21,612) 23,772 (+21,576)	+4039.63% +982.51%	22,158 (+21,612) 23,772 (+21,576)	+3958.24% +982.51%	22,158 (+21,612) 23,772 (+21,576)	+3958.24% +982.51%	22,170 (+21,612) 23,772 (+21,576)	+3873.12% +982.51%	2 (0) 1 (0)
ImplementationCurve	146,107 (+59,572)	nModInv pModInv	23,134 (+21,204) 23,112 (+21,204)	+1098.65% +1111.32%	23,134 (+21,204) 23,112 (+21,204)	+1098.65% +1111.32%	23,134 (+21,204) 23,112 (+21,204)	+1098.65% +1111.32%	23,134 (+21,204) 23,112 (+21,204)	+1098.65% +1111.32%	1 (0) 1 (0)
ImplementationECDSA256r1	1,126,819 (+116,772)	mulmuladd verify	49,889 (+22,356) 192,323 (+23,600)	+81.20% +13.99%	131,060 (+22,428) 226,387 (+23,571)	+20.65% +11.62%	130,745 (+22,140) 226,944 (+23,564)	+20.39% +11.59%	212,862 (+23,076) 254,369 (+23,612)	+12.16% +10.23%	4 (0) 566 (0)

[github-actions]

LCOV of commit ca83ad2 during Tests #213

Summary coverage rate:
  lines......: 38.6% (32 of 83 lines)
  functions..: 87.5% (7 of 8 functions)
  branches...: no data found

Files changed coverage rate:
                     |Lines       |Functions  |Branches    
  Filename           |Rate     Num|Rate    Num|Rate     Num
  =========================================================
  src/ECDSA256r1.sol |43.9%     41|66.7%     3|    -      0