SD-JWT VC implementation

[UMR1352]

Implementation of SD-JWT VC draft 5.

[nanderstabel]

Hi I was just wondering what is the current status of this work :)

Currently when using this branch like this:

[dependencies]
identity_credential = { git = "https://github.com/iotaledger/identity.rs", branch = "feat/sd-jwt-vc", default-features = false, features = [
    "validator",
    "credential",
    "presentation",
    "domain-linkage",
    "sd-jwt-vc"
] }

which results in a couple of compilation errors:

$ cargo check 
    Checking identity_credential v1.3.1 (https://github.com/iotaledger/identity.rs?branch=feat/sd-jwt-vc#654b188e)
error[E0433]: failed to resolve: use of undeclared crate or module `futures`
 --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:1:5
  |
1 | use futures::future::BoxFuture;
  |     ^^^^^^^ use of undeclared crate or module `futures`

error[E0433]: failed to resolve: use of undeclared crate or module `futures`
 --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:2:5
  |
2 | use futures::future::FutureExt;
  |     ^^^^^^^ use of undeclared crate or module `futures`

error[E0308]: mismatched types
   --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/builder.rs:233:46
    |
233 |       .fold(builder, |builder, (key, value)| builder.insert_claim(key, value));
    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `SdJwtBuilder<H>`, found `Result<SdJwtBuilder<H>, Error>`
    |
    = note: expected struct `SdJwtBuilder<_>`
                 found enum `std::result::Result<SdJwtBuilder<_>, sd_jwt_payload::Error>`
help: consider using `Result::expect` to unwrap the `std::result::Result<SdJwtBuilder<H>, sd_jwt_payload::Error>` value, panicking if the value is a `Result::Err`
    |
233 |       .fold(builder, |builder, (key, value)| builder.insert_claim(key, value).expect("REASON"));
    |                                                                              +++++++++++++++++

error[E0599]: no method named `boxed` found for `async` block `{async block@/home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:105:3: 105:13}` in the current scope
   --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:153:4
    |
105 | /   async move {
106 | |     // Check if current type has already been checked.
107 | |     let is_type_already_checked = passed_types.contains(&current_type);
108 | |     if is_type_already_checked {
...   |
152 | |   }
153 | |   .boxed()
    | |   -^^^^^ method not found in `{async block@/home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:105:3: 105:13}`
    | |___|
    |

Some errors have detailed explanations: E0308, E0433, E0599.
For more information about an error, try `rustc --explain E0308`.
error: could not compile `identity_credential` (lib) due to 4 previous errors

I have quickly resolved them a couple of weeks ago myself just to make it work (see this).

[eike-hass]

Hi I was just wondering what is the current status of this work :)

Currently when using this branch like this:

[dependencies]
identity_credential = { git = "https://github.com/iotaledger/identity.rs", branch = "feat/sd-jwt-vc", default-features = false, features = [
    "validator",
    "credential",
    "presentation",
    "domain-linkage",
    "sd-jwt-vc"
] }

which results in a couple of compilation errors:

$ cargo check 
    Checking identity_credential v1.3.1 (https://github.com/iotaledger/identity.rs?branch=feat/sd-jwt-vc#654b188e)
error[E0433]: failed to resolve: use of undeclared crate or module `futures`
 --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:1:5
  |
1 | use futures::future::BoxFuture;
  |     ^^^^^^^ use of undeclared crate or module `futures`

error[E0433]: failed to resolve: use of undeclared crate or module `futures`
 --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:2:5
  |
2 | use futures::future::FutureExt;
  |     ^^^^^^^ use of undeclared crate or module `futures`

error[E0308]: mismatched types
   --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/builder.rs:233:46
    |
233 |       .fold(builder, |builder, (key, value)| builder.insert_claim(key, value));
    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `SdJwtBuilder<H>`, found `Result<SdJwtBuilder<H>, Error>`
    |
    = note: expected struct `SdJwtBuilder<_>`
                 found enum `std::result::Result<SdJwtBuilder<_>, sd_jwt_payload::Error>`
help: consider using `Result::expect` to unwrap the `std::result::Result<SdJwtBuilder<H>, sd_jwt_payload::Error>` value, panicking if the value is a `Result::Err`
    |
233 |       .fold(builder, |builder, (key, value)| builder.insert_claim(key, value).expect("REASON"));
    |                                                                              +++++++++++++++++

error[E0599]: no method named `boxed` found for `async` block `{async block@/home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:105:3: 105:13}` in the current scope
   --> /home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:153:4
    |
105 | /   async move {
106 | |     // Check if current type has already been checked.
107 | |     let is_type_already_checked = passed_types.contains(&current_type);
108 | |     if is_type_already_checked {
...   |
152 | |   }
153 | |   .boxed()
    | |   -^^^^^ method not found in `{async block@/home/nander/.cargo/git/checkouts/identity.rs-3c836f09661bc7fb/654b188/identity_credential/src/sd_jwt_vc/metadata/vc_type.rs:105:3: 105:13}`
    | |___|
    |

Some errors have detailed explanations: E0308, E0433, E0599.
For more information about an error, try `rustc --explain E0308`.
error: could not compile `identity_credential` (lib) due to 4 previous errors

I have quickly resolved them a couple of weeks ago myself just to make it work (see this).

After solving the mentioned issues and no further comments or reviews from your side we would be ready to release.