Share credential and presentation

Sharing verifiable credentials and presentations securely is a core feature of the Truvity platform. The platform uses DIDComm messaging for sharing credentials and presentations.

Prerequisites

• Install and configure the SDK
• Define credential schema
• Create a draft
• Issue credential

Example: Share a verifiable credential

To send a DIDComm message containing a verifiable credential (VC) or verifiable presentation (VP), use the send method:

TypeScript

await credential.send("targetId", privateKey.id);

Java

credential.send("targetId", privateKey.getId());

Where targetId is the DID of the receiving party.

tip

• If you want to send DIDComm messages between two accounts for testing purposes, you can sign up with a different email (or email alias) and use the DID of a new account.
• To find the DID of your account, go to the Admin Panel and click DID of my tenant.

After you send the DIDComm message with credentials, presentations, and/or files, the target wallet automatically receives the message and unpacks the content.

Advanced: Configuring Transitive Closure

By default, the system retrieves all directly referenced resources as well as any linked resources recursively. If you need to control this behavior, you can use the disable_transitive_closure flag:

TypeScript

await client.didcommMessages.didCommMessageSend({
    data: {
        to: "targetId",
        keyId: privateKey.id,
        credentials: [credential.descriptor.id],
        disableTransitiveClosure: true,
    },
});

Java

client.didcommMessages()
        .didCommMessageSend(DidCommMessageSendInput.builder()
                .data(DidCommMessageSend.builder()
                        .to("targetId")
                        .keyId(privateKey.getId())
                        .credentials(List.of(credential.descriptor().id()))
                        .disableTransitiveClosure(true)
                        .build())
                .build());

About disable_transitive_closure

The disable_transitive_closure flag determines whether the system retrieves only explicitly referenced resources or follows links to related resources:

• true - Only explicitly referenced resources (credentials, files, presentations) are retrieved. Linked resources are ignored.
• false (default) - The system performs transitive traversal, retrieving all directly referenced resources and any linked resources recursively.

This flag applies to resources such as credentials, files, and presentations, influencing how dependencies are resolved during message processing.