Add GetContactFromReceptionIdentity to get the marshalled contact bytes from a reception identity

main.go

@@ -58,6 +58,8 @@ func main() {
 		js.FuncOf(wasm.StoreReceptionIdentity))
 	js.Global().Set("LoadReceptionIdentity",
 		js.FuncOf(wasm.LoadReceptionIdentity))
+	js.Global().Set("GetContactFromReceptionIdentity",
+		js.FuncOf(wasm.GetContactFromReceptionIdentity))
 	js.Global().Set("GetIDFromContact",
 		js.FuncOf(wasm.GetIDFromContact))
 	js.Global().Set("GetPubkeyFromContact",

wasm/identity.go

@@ -11,6 +11,7 @@ package wasm
 
 import (
 	"gitlab.com/elixxir/client/bindings"
+	"gitlab.com/elixxir/client/xxdk"
 	"syscall/js"
 )
 
@@ -109,6 +110,27 @@ func (c *Cmix) GetReceptionRegistrationValidationSignature(
 // Contact Functions                                                          //
 ////////////////////////////////////////////////////////////////////////////////
 
+// GetContactFromReceptionIdentity returns the [contact.Contact] object from the
+// [xxdk.ReceptionIdentity].
+//
+// Parameters:
+//  - args[0] - JSON of [xxdk.ReceptionIdentity] (Uint8Array)
+//
+// Returns:
+//  - Marshalled bytes of [contact.Contact] (string)
+//  - Throws a TypeError if unmarshalling the identity fails
+func GetContactFromReceptionIdentity(_ js.Value, args []js.Value) interface{} {
+	// Note that this function does not appear in normal bindings
+	identityJSON := CopyBytesToGo(args[0])
+	identity, err := xxdk.UnmarshalReceptionIdentity(identityJSON)
+	if err != nil {
+		Throw(TypeError, err)
+		return nil
+	}
+
+	return CopyBytesToJS(identity.GetContact().Marshal())
+}
+
 // GetIDFromContact returns the ID in the [contact.Contact] object.
 //
 // Parameters: