Credential Verification

Validate Verifiable Credentials using Verification Service.

Install Dependency

Package: AffinidiTdk.CredentialVerificationClient


        
dotnet add package AffinidiTdk.CredentialVerificationClient

You can check the latest version of this module on the nuget.org repository or view the source code at the GitHub repository.

Classes and Methods

Default API

Verify Verifiable Credentials and Verifiable Presentations.

VerifyCredentials

Generate and issue a credentil offer to the user.

Parameters

VerifyCredentialInput [Object]

JSON object to provide the Verifiable Credentials to validate.

The verify credential requires the Newtonsoft.Json.Linq library to build the VC Object.

Example

        
using AffinidiTdk.CredentialVerificationClient.Api;
using AffinidiTdk.CredentialVerificationClient.Client;
using AffinidiTdk.CredentialVerificationClient.Model;
using Newtonsoft.Json.Linq;

        

// Pass the projectScopedToken generated from AuthProvider package
Configuration config = new Configuration();
config.AddApiKey("authorization", projectScopedToken);

DefaultApi api = new DefaultApi(config);

// Sample VC data from the portal
var vc = new JObject
{
    {
        "@context", new JArray(
            "https://www.w3.org/2018/credentials/v1",
            "https://schema.affinidi.com/EmailV1-0.jsonld"
        )
    },
    {
        "id", "claimId:97fa9b2e9d1f70bd5da4f202"
    },
    {
        "type", new JArray(
            "VerifiableCredential",
            "Email"
        )
    },
    {
        "holder", new JObject 
        {
            { "id", "did:key:890890890890890" }
        }
    },
    {
        "credentialSubject", new JObject
        {
            { "email", "lorem@ipsum.com" }
        }
    },
    {
        "credentialSchema", new JObject
        {
            { "id", "https://schema.affinidi.com/EmailV1-0.json" },
            { "type", "JsonSchemaValidator2018" }
        }
    },
    { "issuanceDate", "2025-06-01T06:10:15.081Z" },
    { "expirationDate", "2030-06-01T06:10:14.954Z" },
    { "issuer", "did:key:890890890890890" },
    {
        "proof", new JObject
        {
            ...
        }
    }
};

VerifyCredentialInput input = new VerifyCredentialInput(verifiableCredentials: [vc]);
VerifyCredentialOutput result = api.VerifyCredentials(input);

VerifyPresentation

Generate and issue a credentil offer to the user.

Parameters

VerifyPresentationInput [Object]

JSON object to provide the Verifiable Presentation to validate.

The verify presentation requires the Newtonsoft.Json.Linq library to build the VC Object.

Example

        

using AffinidiTdk.CredentialVerificationClient.Api;
using AffinidiTdk.CredentialVerificationClient.Client;
using AffinidiTdk.CredentialVerificationClient.Model;
using Newtonsoft.Json.Linq;

        
// Pass the projectScopedToken generated from AuthProvider package
Configuration config = new Configuration();
config.AddApiKey("authorization", projectScopedToken);

DefaultApi api = new DefaultApi(config);

// Sample VP data from the portal
var vp = new JObject
{
    { "id", "claimId:YHX_e5ouPqyiamSAPw9D2" },
    { "type", new JArray("VerifiablePresentation") },
    { "@context", new JArray("https://www.w3.org/2018/credentials/v1") },
    {
        "verifiableCredential", new JArray(
            new JObject
            {
                {
                    "@context", new JArray(
                        "https://www.w3.org/2018/credentials/v1",
                        "https://schema.affinidi.io/TGamerVCV1R0.jsonld"
                    )
                },
                { "id", "claimId:158617d7a10de4ad" },
                {
                    "type", new JArray(
                        "VerifiableCredential",
                        "gamerProfile"
                    )
                },
                {
                    "holder", new JObject
                    {
                        { "id", "did:key:890890890890890" }
                    }
                },
                {
                    "credentialSubject", new JObject
                    {
                        { "name", "iopiopiop" },
                        ...
                    }
                },
                {
                    "credentialSchema", new JObject
                    {
                        { "id", "https://schema.affinidi.io/TGamerVCV1R0.json" },
                        { "type", "gamerProfile" }
                    }
                },
                { "issuanceDate", "2025-09-23T02:23:27.298Z" },
                { "expirationDate", "2025-09-23T02:53:26.817Z" },
                { "issuer", "did:key:890890890890890" },
                {
                    "proof", new JObject
                    {
                        ...
                    }
                }
            }
        )
    },
    {
        "holder", new JObject
        {
            { "id", "did:key:890890890890890" }
        }
    },
    {
        "proof", new JObject
        {
            ...
        }
    }
};

VerifyPresentationInput input = new VerifyPresentationInput(verifiablePresentation: vp);
VerifyPresentationOutput result = api.VerifyPresentation(input);