RootHeraldKit Swift Package

dependencies: [
    .package(url: "https://github.com/rootherald/rootherald-ios.git",
             from: "1.0.0")
],
targets: [
    .target(
        name: "MyApp",
        dependencies: [
            .product(name: "RootHeraldKit", package: "rootherald-ios")
        ]
    )
]

import RootHeraldKit

@MainActor
final class SignupViewModel: ObservableObject {
    // Keyless: no api_key, no endpoint — nothing to connect to.
    private let client = RootHeraldClient()

    func submit(email: String, password: String) async {
        do {
            // 1. Ask YOUR backend for a fresh challenge nonce (it called
            //    POST /api/v1/attestations/challenge with its rh_sk_ secret).
            let nonce = try await api.challengeNonce(action: "signup")

            // 2. Collect a keyless evidence blob on-device — no verdict, no
            //    call to RootHerald.
            let evidence = try await client.collectEvidence(nonce: nonce)

            // 3. Relay the opaque blob to your backend, which POSTs it to
            //    /attestations/verify and enforces the returned verdict.
            try await api.signup(email: email, password: password,
                                 evidence: evidence)
        } catch {
            showError("Evidence collection failed: \(error)")
        }
    }
}