@gramota/credential-format

Pluggable credential-format handler registry — Strategy + Registry pattern. Default registry ships with dc+sd-jwt; add custom handlers for mDoc, W3C-VC-JWT, or proprietary formats without forking the wallet.

Part of Gramota — the TypeScript SDK for the EU Digital Identity Wallet (EUDIW).

Install

pnpm add @gramota/credential-format
# or: npm install @gramota/credential-format
# or: yarn add @gramota/credential-format

Quick example

import {
  createDefaultCredentialFormatRegistry,
  SdJwtVcFormatHandler,
} from "@gramota/credential-format";

const registry = createDefaultCredentialFormatRegistry();
const handler = registry.get("dc+sd-jwt");

What's inside

• CredentialFormatRegistry — register, look up, and dispatch by format string
• SdJwtVcFormatHandler — default handler for dc+sd-jwt / vc+sd-jwt
• createDefaultCredentialFormatRegistry — pre-populated registry
• CredentialFormatHandler interface — implement for new formats (mDoc, etc.)
• hasIssuanceCapability, IssuanceCapableHandler — capability flag for handlers that also issue (not just present / verify)

For the high-level Holder / Verifier API that consumes the registry, see the main repo.

License

Apache 2.0