feature: implementation of HDKey

[cristianIOHK]

Implementation of HDKey

[atala-dev]

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[goncalo-frade-iohk]

We need to add this tests as well but adapted for KMM Apollo code ;)

final class BIP32Tests: XCTestCase {

    let mnemonics = ["blade", "multiply", "coil", "rare", "fox", "doll", "tongue", "please", "icon", "mind", "gesture", "moral", "old", "laugh", "symptom", "assume", "burden", "appear", "always", "oil", "ticket", "vault", "return", "height"]

    func testBip32RootKeyGeneration() throws {
        let seed = try CreateSeedOperation(words: mnemonics).compute()
        let operation = CreateSec256k1KeyPairOperation(seed: seed, keyPath: .init(index: 0))
        let privateKey = try operation.compute()
        XCTAssertEqual(
            privateKey.raw.base64UrlEncodedString(),
            "xURclKhT6as1Tb9vg4AJRRLPAMWb9dYTTthDvXEKjMc"
        )
    }

    func testBip32KeyPathGeneration() throws {
        let seed = try CreateSeedOperation(words: mnemonics).compute()
        let operation = CreateSec256k1KeyPairOperation(seed: seed, keyPath: .init(index: 3))
        let privateKey = try operation.compute()
        XCTAssertEqual(
            privateKey.raw.base64UrlEncodedString(),
            "N_JFgvYaReyRXwassz5FHg33A4I6dczzdXrjdHGksmg"
        )
    }

    func testBip32KeyPathGenerationPublicKey() throws {
        let seed = try CreateSeedOperation(words: mnemonics).compute()
        let operation = CreateSec256k1KeyPairOperation(seed: seed, keyPath: .init(index: 3))
        let privateKey = try operation.compute()
        XCTAssertEqual(
            privateKey.publicKey().raw.base64UrlEncodedString(),
            "BD-l4lrQ6Go-oN5XtdpY6o5dyf2V2v5EbMAvRjVGJpE1gYVURJfxKMpNPnKlLr4MOLNVaYvBNOoy9L50E8jVx8Q"
        )
    }
}

[hamada147]

We mustn't disable the macOS tests.