Replace did:key with did:foo in resolution example

examples/1_advanced/6_custom_resolution.rs

@@ -1,12 +1,6 @@
 // Copyright 2020-2022 IOTA Stiftung
 // SPDX-License-Identifier: Apache-2.0
 
-use anyhow::Context;
-// Use the external did-key crate to avoid implementing the entire DID key method in this example.
-use did_key::Config;
-use did_key::DIDCore;
-use did_key::DIDKey;
-use did_key::KeyPair;
 use examples::create_did;
 use examples::random_stronghold_path;
 use examples::API_ENDPOINT;
@@ -16,7 +10,6 @@ use identity_iota::credential::AbstractThreadSafeValidatorDocument;
 use identity_iota::crypto::KeyPair as IotaKeyPair;
 use identity_iota::did::CoreDID;
 use identity_iota::did::CoreDocument;
-use identity_iota::did::DID;
 use identity_iota::iota::IotaDID;
 use identity_iota::iota::IotaDocument;
 use identity_iota::resolver::Resolver;
@@ -31,18 +24,18 @@ use iota_client::Client;
 /// Resolver<CoreDocument> in this example and just worked with `CoreDocument` representations throughout.
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
-  // Create a method agnostic resolver and attach handlers for the "key" and "iota" methods.
+  // Create a method agnostic resolver and attach handlers for the "foo" and "iota" methods.
   let mut resolver: Resolver = Resolver::new();
 
   // Create a new client to interact with the IOTA ledger.
   let client: Client = Client::builder().with_primary_node(API_ENDPOINT, None)?.finish()?;
 
   // This is a convenience method for attaching a handler for the "iota" method by providing just a client.
   resolver.attach_iota_handler(client.clone());
-  resolver.attach_handler("key".to_owned(), resolve_ed25519_did_key);
+  resolver.attach_handler("foo".to_owned(), resolve_did_foo);
 
-  // A valid Ed25519 did:key value taken from https://w3c-ccg.github.io/did-method-key/#example-1-a-simple-ed25519-did-key-value.
-  let did_key: CoreDID = "did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK".parse()?;
+  // A fake did:foo DID for demonstration purposes.
+  let did_foo: CoreDID = "did:foo:0e9c8294eeafee326a4e96d65dbeaca0".parse()?;
 
   // Create a new secret manager backed by a Stronghold.
   let mut secret_manager: SecretManager = SecretManager::Stronghold(
@@ -55,21 +48,21 @@ async fn main() -> anyhow::Result<()> {
   let (_, iota_document, _): (Address, IotaDocument, IotaKeyPair) = create_did(&client, &mut secret_manager).await?;
   let iota_did: IotaDID = iota_document.id().clone();
 
-  // Resolve did_key to get an abstract document.
-  let did_key_doc: AbstractThreadSafeValidatorDocument = resolver.resolve(&did_key).await?;
+  // Resolve did_foo to get an abstract document.
+  let did_foo_doc: AbstractThreadSafeValidatorDocument = resolver.resolve(&did_foo).await?;
 
   // Resolve iota_did to get an abstract document.
   let iota_doc: AbstractThreadSafeValidatorDocument = resolver.resolve(&iota_did).await?;
 
   // These documents are mainly meant for validating credentials and presentations, but one can also attempt to cast
   // them to concrete document types.
 
-  let did_key_doc: CoreDocument = *did_key_doc
+  let did_foo_doc: CoreDocument = *did_foo_doc
     .into_any()
     .downcast::<CoreDocument>()
-    .expect("downcasting to the return type of the did:key handler should be fine");
+    .expect("downcasting to the return type of the did:foo handler should be fine");
 
-  println!("Resolved DID Key document: {}", did_key_doc.to_json_pretty()?);
+  println!("Resolved DID foo document: {}", did_foo_doc.to_json_pretty()?);
 
   let iota_doc: IotaDocument = *iota_doc
     .into_any()
@@ -80,27 +73,22 @@ async fn main() -> anyhow::Result<()> {
   Ok(())
 }
 
-/// Resolves an Ed25519 did:key DID to a spec compliant DID Document represented as a [`CoreDocument`].
-///
-/// # Errors
-/// Errors if the DID is not a valid Ed25519 did:key.  
-async fn resolve_ed25519_did_key(did: CoreDID) -> anyhow::Result<CoreDocument> {
-  DIDKey::try_from(did.as_str())
-    .map_err(|err| anyhow::anyhow!("the provided DID does not satisfy the did:key format: {:?}", err))
-    .and_then(|key_pair| {
-      if let KeyPair::Ed25519(..) = key_pair {
-        Ok(key_pair)
-      } else {
-        Err(anyhow::anyhow!("the provided DID is not an Ed25519 did:key"))
-      }
-    })
-    .map(|key| {
-      key.get_did_document(Config {
-        use_jose_format: false,
-        serialize_secrets: false,
-      })
-    })?
-    .to_json()
-    .and_then(|doc_json| CoreDocument::from_json(&doc_json))
-    .context("failed to obtain a supported DID Document")
+/// Resolve a did:foo to a DID document.
+async fn resolve_did_foo(did: CoreDID) -> anyhow::Result<CoreDocument> {
+  Ok(
+    CoreDocument::from_json(&format!(
+      r#"{{
+      "id": "{did}",
+      "verificationMethod": [
+        {{
+          "id": "{did}#key-1",
+          "controller": "{did}",
+          "type": "Ed25519VerificationKey2018",
+          "publicKeyMultibase": "zGurPxZGpqnJ6j866DNBXYQJH2KzJjmQ9KBpCYp9oYJom"
+        }}
+      ]
+      }}"#,
+    ))
+    .unwrap(),
+  )
 }

examples/Cargo.toml

@@ -7,7 +7,6 @@ publish = false
 
 [dependencies]
 anyhow = "1.0.62"
-did-key = { version = "0.1.1", default-features = false }
 identity_iota = { path = "../identity_iota" }
 iota-client = { version = "2.0.1-rc.3", default-features = false, features = ["tls", "stronghold"] }
 # Remove once iota-client 2.0.1-rc.4 is released.