[Bug] identity_credential::credential::builder::default() inconsistent with VC 1.1 regarding @context

[Oran-Dan]

Bug description

The identity_credential::credential::builder::default() gives as default value for the @context property:

{
    "@context": "https://www.w3.org/2018/credentials/v1",
    ....
}

The spec states that the value MUST be an "ordered set", which would be:

{
    "@context": ["https://www.w3.org/2018/credentials/v1"],
    ....
}

https://www.w3.org/TR/vc-data-model/#contexts

Language version

rustc 1.82.0 (f6e511eec 2024-10-15)

IOTA Identity version

These are the Cargo.toml deps

identity_credential = { version = "1.3", default-features = false, features = [
    "credential",
    "domain-linkage",
    "presentation",
    "validator",
] }
identity_core = { version = "1.3" }
identity_eddsa_verifier = { version = "1.3" }
identity_iota = { version = "1.3" }
identity_jose = { version = "1.3" }
iota_stronghold = { version = "2.1" }

Hardware specification

• Operating system: Linux Ubuntu 24.04.1 LTS

Steps To reproduce the bug

1. Use the identity_credential::credential::builder::default()
2. Print the created struct to see the incoherence with the spec

[eike-hass]

@Oran-Dan thank you for reporting the issue. That indeed looks faulty, we will investigate ASAP.

[Oran-Dan]

Thanks :)