lib secp256k1.cr v0.2.0

this release refactors the entire library and entangles some of the submodules exposed by the library.

this library now exposes the following modules (in logical order):

• Secp256k1: necessary constants and data structures
• Secp256k1::Core: the entire core mathematics behind the elliptic curve cryptography
• Secp256k1::Util: all tools for the handling of private-public key-pairs
• Secp256k1::Hash: implementation of various hashing algorithms for convenience
• Secp256k1::Signature: allows for signing messages and verifying signatures
• Secp256k1::Bitcoin: for the generation of bitcoin addresses
• Secp256k1::Ethereum: for the generation of ethereum addresses

docs are now published on github pages: q9f.github.io/secp256k1.cr

changes:

• add docs to readme (#26)
• add crystal docs (#25)
• rename utils to util (#24)
• refactor code with meaningful submodule namespaces (#23)

lib secp256k1.cr v0.1.6

this is a feature release that allows for basic ecdsa signature generation and verification.

changes:

• allow to sign and verify messages #20

lib secp256k1.cr v0.1.5

this is a feature release that allows for retrieving bitcoin addresses from wallet import format by honoring the compressed byte.

changes:

• allow for wif to address #19

lib secp256k1.cr v0.1.4

this is a feature release that allows for generation of mini private keys and proper handling of bitcoin's wallet import format.

changes:

• try: add an example program #14
• add support for mini private keys #16
• add support for wallet import format #18

lib secp256k1.cr v0.1.3

this is a feature release that allows for generation of bitcoin and ethereum addresses.

changes:

• add cryptographic hashing functions #9
• add bitcoin and ethereum address modules #9
• allow for export of unprefixed uncompressed keys for ethereum #9
• add tests for hashes on bytes #9
• implement eip-55 test cases #9
• bind mpz_powm_sec from libgmp #11

lib secp256k1.cr v0.1.2

this is a feature release adding the ability to encode and decode the different public key formats

changes:

• allow for converting between different public key formats #7
• add a known private key to tests #7
• raise if it tries to decode compressed keys as mod_exp overflows #7

lib secp256k1.cr v0.1.1

this is a bugfix release that improves performance and stability.

changes:

• use proper integer division #6
• ensure private keys are within the ec field size #6
• disallow ec multiplication with invalid private keys #6

lib secp256k1.cr v0.1.0

initial release for the secp256k1 crystal library

containing:

• the constants describing the elliptic curve #1
• the four Secp256k1:: key functions for ec_mul, ec_add, ec_double, and ec_mod_inv #1
• utilities to generate private and public keys #1
• tests for the secp256k1 module #1
• a struct for EC_Point #1
• github actions checking format and spec #2
• a meaningful readme #3