Helper methods to extract data.

rust-src/concordium_base/src/web3id/did.rs

@@ -1,8 +1,12 @@
 //! Definition of Concordium DIDs and their parser.
 
-use crate::{base::CredentialRegistrationID, common::base16_decode_string, id::types::IpIdentity};
+use crate::{
+    base::CredentialRegistrationID,
+    common::{base16_decode_string, Deserial},
+    id::types::IpIdentity,
+};
 use concordium_contracts_common::{
-    AccountAddress, ContractAddress, OwnedEntrypointName, OwnedParameter,
+    AccountAddress, ContractAddress, EntrypointName, OwnedEntrypointName, OwnedParameter,
 };
 use nom::{
     branch::alt,
@@ -92,6 +96,35 @@ pub enum IdentifierType {
     Idp { idp_identity: IpIdentity },
 }
 
+impl IdentifierType {
+    pub fn extract_contract<D: Deserial>(
+        &self,
+        ep: EntrypointName,
+    ) -> Option<(ContractAddress, D)> {
+        let IdentifierType::ContractData {
+        address,
+        entrypoint,
+        parameter,
+        } = self else {
+            return None
+        };
+        if entrypoint.as_entrypoint_name() != ep {
+            return None;
+        }
+        let d = crate::common::from_bytes(&mut std::io::Cursor::new(parameter.as_ref())).ok()?;
+        Some((*address, d))
+    }
+
+    pub fn extract_public_key(&self) -> Option<ed25519_dalek::PublicKey> {
+        let IdentifierType::PublicKey {
+            key,
+        } = self else {
+            return None
+        };
+        Some(*key)
+    }
+}
+
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize, PartialEq, Eq)]
 #[serde(try_from = "String", into = "String")]
 /// A DID method.