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Examples

Verifiable Presentations with Linked Data Proofs:

Example Verifiable Presentation

{
  "@context" : [ "https://www.w3.org/2018/credentials/v1" ],
  "type" : [ "VerifiablePresentation" ],
  "holder" : "did:key:z6MkwBZ6oiJ71ovCohPfdsgBrQinMXnFn6wJxVZHpZEpSh8x",
  "verifiableCredential" : {
    "@context" : [ "https://www.w3.org/2018/credentials/v1", "https://www.w3.org/2018/credentials/examples/v1" ],
    "type" : [ "VerifiableCredential", "UniversityDegreeCredential" ],
    "id" : "http://example.edu/credentials/3732",
    "issuer" : "did:example:76e12ec712ebc6f1c221ebfeb1f",
    "issuanceDate" : "2019-06-16T18:56:59Z",
    "expirationDate" : "2019-06-17T18:56:59Z",
    "credentialSubject" : {
      "id" : "did:example:ebfeb1f712ebc6f1c276e12ec21",
      "college" : "Test University",
      "degree" : {
        "name" : "Bachelor of Science and Arts",
        "type" : "BachelorDegree"
      }
    },
    "proof" : {
      "type" : "Ed25519Signature2018",
      "created" : "2021-11-17T22:43:04Z",
      "proofPurpose" : "assertionMethod",
      "verificationMethod" : "did:example:76e12ec712ebc6f1c221ebfeb1f#keys-1",
      "jws" : "eyJiNjQiOmZhbHNlLCJjcml0IjpbImI2NCJdLCJhbGciOiJFZERTQSJ9..jbhZsH1jylvuZLov502qhTRkYvgbepU8ds8Mbgf4X7dhVp8F1P89Ql5WMA2DQEJxMGsVlaT8plfSY0JUw6XmDg"
    }
  },
  "proof" : {
    "type" : "Ed25519Signature2018",
    "created" : "2021-11-18T08:57:43Z",
    "domain" : "example.com",
    "nonce" : "343s$FSFDa-",
    "proofPurpose" : "authentication",
    "verificationMethod" : "did:key:z6MkwBZ6oiJ71ovCohPfdsgBrQinMXnFn6wJxVZHpZEpSh8x#z6MkwBZ6oiJ71ovCohPfdsgBrQinMXnFn6wJxVZHpZEpSh8x",
    "jws" : "eyJiNjQiOmZhbHNlLCJjcml0IjpbImI2NCJdLCJhbGciOiJFZERTQSJ9..twmPVhZgmKnnx6EI1xmUt3t_0GJizjambyLxWioG1hzwmDYnadWcQCC600uRpOE5WRIdx14y8uRHIa7AxSo5Cw"
  }
}

Example code (signing)

VerifiablePresentation verifiablePresentation = VerifiablePresentation.builder()
        .verifiableCredential(verifiableCredential)
        .holder(URI.create("did:key:z6MkwBZ6oiJ71ovCohPfdsgBrQinMXnFn6wJxVZHpZEpSh8x"))
        .build();

byte[] testEd25519PrivateKey2 = Hex.decodeHex("984b589e121040156838303f107e13150be4a80fc5088ccba0b0bdc9b1d89090de8777a28f8da1a74e7a13090ed974d879bf692d001cddee16e4cc9f84b60580".toCharArray());

Ed25519Signature2018LdSigner signer2 = new Ed25519Signature2018LdSigner(testEd25519PrivateKey2);
signer2.setCreated(new Date());
signer2.setProofPurpose(LDSecurityKeywords.JSONLD_TERM_AUTHENTICATION);
signer2.setVerificationMethod(URI.create("did:key:z6MkwBZ6oiJ71ovCohPfdsgBrQinMXnFn6wJxVZHpZEpSh8x#z6MkwBZ6oiJ71ovCohPfdsgBrQinMXnFn6wJxVZHpZEpSh8x"));
signer2.setDomain("example.com");
signer2.setNonce("343s$FSFDa-");
LdProof ldProof2 = signer2.sign(verifiablePresentation);

System.out.println(verifiablePresentation.toJson(true));

Example code (verifying)

byte[] testEd25519PublicKey = Hex.decodeHex("f890ab605908a65b89b926fba3b540c0132ce147e3dc5da9fbe7f1445d7279e5".toCharArray());

VerifiablePresentation verifiablePresentation = VerifiablePresentation.fromJson(new FileReader("input.jsonld"));
Ed25519Signature2018LdVerifier verifier = new Ed25519Signature2018LdVerifier(testEd25519PublicKey);
System.out.println(verifier.verify(verifiablePresentation));