Merge pull request #178 from xmtp/insipx/validate-cred

Protos for credential validation of Inbox IDs

proto/mls_validation/v1/service.proto

@@ -3,6 +3,7 @@ syntax = "proto3";
 package xmtp.mls_validation.v1;
 
 import "identity/associations/association.proto";
+import "identity/credential.proto";
 
 option go_package = "github.com/xmtp/proto/v3/go/mls_validation/v1";
 
@@ -16,6 +17,27 @@ service ValidationApi {
 
   // Gets the final association state for a batch of identity updates
   rpc GetAssociationState(GetAssociationStateRequest) returns (GetAssociationStateResponse) {}
+
+  // Validates InboxID key packages and returns credential information for them, without checking
+  // whether an InboxId <> InstallationPublicKey pair is really valid.
+  rpc ValidateInboxIdKeyPackages(ValidateKeyPackagesRequest) returns (ValidateInboxIdKeyPackagesResponse) {}
+
+  // Validate an InboxID Key Package
+  // need public key possibly
+  rpc ValidateInboxIds(ValidateInboxIdsRequest) returns (ValidateInboxIdsResponse) {}
+}
+
+// Validates a Inbox-ID Key Package Type
+message ValidateInboxIdKeyPackagesResponse {
+  // one response corresponding to information about one key package
+  message Response {
+    bool is_ok = 1;
+    string error_message = 2;
+    xmtp.identity.MlsCredential credential = 3;
+    bytes installation_public_key = 4;
+  }
+
+  repeated Response responses = 1;
 }
 
 // Contains a batch of serialized Key Packages
@@ -78,3 +100,28 @@ message GetAssociationStateResponse {
   xmtp.identity.associations.AssociationState association_state = 1;
   xmtp.identity.associations.AssociationStateDiff state_diff = 2;
 }
+
+// Request to validate an InboxID with the backend service. Ensures an Inbox Id <> Installation key are valid.
+message ValidateInboxIdsRequest {
+  // a single validation request
+  message ValidationRequest {
+    xmtp.identity.MlsCredential credential = 1;
+    bytes installation_public_key = 2;
+    repeated xmtp.identity.associations.IdentityUpdate identity_updates = 3;
+  }
+
+  // list of validation requests
+  repeated ValidationRequest requests = 1;
+}
+
+// Response to ValidateInboxIdRequest
+message ValidateInboxIdsResponse {
+  // a single validation response
+  message ValidationResponse {
+    bool is_ok = 1;
+    string error_message = 2;
+    string inbox_id = 3;
+  }
+  // List of validation responses
+  repeated ValidationResponse responses = 1;
+}