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lionello / ECMath.sol
Last active June 11, 2023 05:44
ECDSA verification and recovery for curve secp256r1
/*
MIT License
Copyright (c) 2018 Lionello Lunesu
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is