tesseract-one/csecp256k1.swift

Installation

CSecp256k1.swift deploys to macOS, iOS, tvOS, watchOS and Linux. It has been tested on the latest OS releases only however, as the module uses very few platform-provided APIs, there should be very few issues with earlier versions.

Setup instructions:

• Swift Package Manager:

Add this to the dependency section of your Package.swift manifest:

``Swift .package(url: "https://github.com/tesseract-one/CSecp256k1.swift.git", from: "0.2.0") ``

• CocoaPods: Put this in your Podfile:

``Ruby pod 'CSecp256k1', '~> 0.2' ``

Usage Examples

Sign and Verify

import CSecp256k1

let privKey: [UInt8] = [
    0x9d, 0x61, 0xb1, 0x9d, 0xef, 0xfd, 0x5a, 0x60, 0xba,
    0x84, 0x4a, 0xf4, 0x92, 0xec, 0x2c, 0xc4, 0x44, 0x49,
    0xc5, 0x69, 0x7b, 0x32, 0x69, 0x19, 0x70, 0x3b, 0xac,
    0x03, 0x1c, 0xae, 0x7f, 0x60
]

let data = [UInt8](repeating: 0, count: 32)

let context: OpaquePointer! = secp256k1_context_create(
    UInt32(SECP256K1_CONTEXT_SIGN|SECP256K1_CONTEXT_VERIFY)
)

var signature = secp256k1_ecdsa_recoverable_signature()
let res = secp256k1_ecdsa_sign_recoverable(context, &signature, data, privKey, nil, nil)
assert(res > 0)

var pubKey = secp256k1_pubkey()
let res2 = secp256k1_ec_pubkey_create(context, &pubKey, privKey)
assert(res2 > 0)

var ssig = secp256k1_ecdsa_signature()
let res3 = secp256k1_ecdsa_recoverable_signature_convert(context, &ssig, &signature)
assert(res3 > 0)

let isValid = secp256k1_ecdsa_verify(context, &ssig, hash, &pubKey)
assert(isValid == 1)

License

CSecp256k1.swift can be used, distributed and modified under the Apache 2.0 license.

Bitcoin secp256k1 can be used, distributed and modified under the MIT license.

Package Metadata

Repository: tesseract-one/csecp256k1.swift

Default branch: main

README: README.md