@sovrahq/holder-core

Platform-agnostic core for a Sovra credential holder/wallet: SD-JWT VC handling, OpenID4VCI/VP protocol flows, credential storage, and P-256/EIP-712 crypto utilities.

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Version: 0.1.0

Version published: 2 days ago

Weekly downloads: 71

Maintainers: 2

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Created: 2 days ago

Source

@sovrahq/holder-core

Platform-agnostic core for a Sovra credential holder/wallet. It bundles the logic a holder app needs, independent of any specific runtime (React Native, browser, …):

Platform interfaces — SecureStorage, PasskeyProvider, CameraScanner contracts the host app implements.
API client — ApiClient for issuer/auth-server metadata and token exchange.
State stores — createCredentialStore, createApprovalStore (Zustand).
Credential manager — CredentialManager for parsing/handling SD-JWT VCs.
Protocol flows — IssuanceProtocol (OpenID4VCI) and PresentationProtocol (OpenID4VP).
Crypto utilities — keccak256, sha256, P-256 signing, and EIP-712 helpers (exported from @sovrahq/holder-core/utils).

Install

npm install @sovrahq/holder-core

Usage

import { ApiClient, CredentialManager } from "@sovrahq/holder-core";
import { base64urlEncode } from "@sovrahq/holder-core/utils";

The published package ships compiled JavaScript and type declarations from dist/.

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Package last updated on 02 Jul 2026

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