resolver

@acta-team/did-stellar

Official TypeScript SDK for the did:stellar v0.1 method.

DID method	did:stellar
Networks	mainnet, testnet
Testnet registry	CB7ATU7SF5QUKJMSULJDJVWJZVDXC23HTZX6NFUDTSFPVT6MA575NNZJ
Spec	v0.1
DIF compatibility	Drop-in driver for did-resolver

What's inside

• Resolver — resolveDidStellar(did) reads the on-chain DidRecord via Stellar RPC and returns a W3C DID Document.
• DIF driver — getResolver() plugs straight into new Resolver({...}) from did-resolver.
• Prepare / submit — four mutation helpers (prepareRegisterDidXdr, prepareUpdateDidXdr, prepareTransferControllerXdr, prepareDeactivateDidXdr) that build unsigned XDRs, plus submitSignedXdr to deliver them.
• Proof of control — JCS-canonicalised challenges, buildChallenge, verifyProofOfControl (Ed25519, ±5 min replay window).
• Optional HTTP client — ActaDidClient for integrators that prefer talking to did.acta.build rather than wiring a Stellar RPC themselves.
• React hook — useDid() (subpath @acta-team/did-stellar/hooks) for browser apps.
• Typed errors — every failure is a DidError with a stable code string (did_not_found, version_mismatch, signature_invalid, …).

The SDK has zero ACTA-hosted dependencies in its hot path. You can resolve any did:stellar:... with just a Stellar RPC URL.

Install

npm install @acta-team/did-stellar
# peer (only if you use the ./hooks entrypoint):
npm install react

Quickstart — resolve

import { resolveDidStellar } from '@acta-team/did-stellar';

const { didDocument, didDocumentMetadata } = await resolveDidStellar(
  'did:stellar:testnet:aaaqeayeaudaocajbifqydiob4'
);
console.log(didDocument);

Defaults: SDF public RPC (https://soroban-testnet.stellar.org) + the canonical registry contract ID. Override either via { rpcUrl, registryContractId }.

Quickstart — DIF driver

import { Resolver } from 'did-resolver';
import { getResolver } from '@acta-team/did-stellar/resolver';

const resolver = new Resolver({ ...getResolver() });
const result = await resolver.resolve('did:stellar:testnet:aaaqeayeaudaocajbifqydiob4');

Quickstart — register a DID

import {
  generateDidId,
  buildDidStellar,
  prepareRegisterDidXdr,
  submitSignedXdr,
} from '@acta-team/did-stellar';

const didId = generateDidId();
const did = buildDidStellar('testnet', didId);

const prepared = await prepareRegisterDidXdr({
  did,
  sourcePublicKey: 'G...',
  record: {
    controller: 'G...',
    authentication: [{ publicKeyMultibase: 'z6Mk...' }],
    assertionMethod: [{ publicKeyMultibase: 'z6Mk...' }],
    keyAgreement: [],
    services: [],
  },
});

// Sign with Freighter / Albedo / Hana / server-side key ...
const signedXdr = await signWithWallet(prepared.xdr, {
  networkPassphrase: prepared.networkPassphrase,
});

const { txId } = await submitSignedXdr({
  signedXdr,
  network: prepared.network,
});

Quickstart — proof of control

import {
  buildChallenge,
  generateNonce,
  jcsCanonicalize,
  resolveDidStellar,
  verifyProofOfControl,
} from '@acta-team/did-stellar';

// Verifier issues the challenge:
const challenge = buildChallenge({
  did: 'did:stellar:testnet:aaaqeayeaudaocajbifqydiob4',
  domain: 'verifier.example.com',
  nonce: generateNonce(),
});
const message = jcsCanonicalize(challenge);
// → present `challenge` + `message` to the wallet for Ed25519 signing.

// Wallet returns signature (base64url, no padding):
const signature = '...';

// Verifier:
const { didDocument } = await resolveDidStellar(challenge.did);
const result = await verifyProofOfControl({
  challenge,
  signature,
  didDocument: didDocument!,
  expectedDomain: 'verifier.example.com',
  isNonceFresh: (nonce, did) => myRedis.setnx(`pc:${did}:${nonce}`, '1', 'EX', 300),
});
if (!result.valid) throw result.reason;

Error handling

Every SDK function rejects with DidError. Branch on code:

import { DidError } from '@acta-team/did-stellar';

try {
  await prepareUpdateDidXdr({ ... });
} catch (err) {
  if (DidError.is(err) && err.code === 'version_mismatch') {
    // re-read the record, rebuild, retry
  } else {
    throw err;
  }
}

See src/errors.ts for the full DidErrorCode union.

Spec conformance

The package ships vectors A.1–A.3 from the spec and pnpm test verifies the DID Document builder produces bit-identical output. Adding new functionality without updating the spec is intentionally a CI failure surface.

License

MIT