dart-secp256k1

Pure secp256k1 implement for dart language.

secp256k1 refers to the parameters of the elliptic curve used in Bitcoin's public-key cryptography, and is defined in Standards for Efficient Cryptography (SEC) (Certicom Research, http://www.secg.org/sec2-v2.pdf). Currently Bitcoin uses secp256k1 with the ECDSA algorithm, though the same curve with the same public/private keys can be used in some other algorithms such as Schnorr.

Usage

A simple usage example:

var pk = PrivateKey.fromHex('c37c299bb7f5ffd8d9329d052983342a8c3234ff3b3fa32a292187341f7146d7');
var pub = pk.publicKey;
print(pub.toHex());
print(pub.toCompressedHex());

var messageHash = 'b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9';
var sig = pk.signature(messageHash);
print(sig.verify(pub, messageHash)); // true

Features and bugs

WARN: This lib does not not provide deterministic ECDSA signature!

Please file feature requests and bugs at the issue tracker.