Implement key uploads (#1202)

* Add storage layer for postgres/sqlite

* Return OTK counts when inserting new keys

* Hook up the key DB and make a test pass

* Convert postgres queries to be sqlite queries

* Blacklist test due to requiring rejected events

* Unbreak tests

* Update blacklist

keyserver/storage/tables/interface.go

@@ -0,0 +1,32 @@
+// Copyright 2020 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tables
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/matrix-org/dendrite/keyserver/api"
+)
+
+type OneTimeKeys interface {
+	SelectOneTimeKeys(ctx context.Context, userID, deviceID string, keyIDsWithAlgorithms []string) (map[string]json.RawMessage, error)
+	InsertOneTimeKeys(ctx context.Context, keys api.OneTimeKeys) (*api.OneTimeKeysCount, error)
+}
+
+type DeviceKeys interface {
+	SelectDeviceKeysJSON(ctx context.Context, keys []api.DeviceKeys) error
+	InsertDeviceKeys(ctx context.Context, keys []api.DeviceKeys) error
+}