adapted statediffing api

pkg/api.go

@@ -0,0 +1,51 @@
+// Copyright © 2020 Vulcanize, Inc
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+package statediff
+
+import (
+	"context"
+	"github.com/ethereum/go-ethereum/statediff"
+)
+
+// APIName is the namespace used for the state diffing service API
+const APIName = "statediff"
+
+// APIVersion is the version of the state diffing service API
+const APIVersion = "0.0.1"
+
+// PublicStateDiffAPI provides an RPC subscription interface
+// that can be used to stream out state diffs as they
+// are produced by a full node
+type PublicStateDiffAPI struct {
+	sds IService
+}
+
+// NewPublicStateDiffAPI creates an rpc subscription interface for the underlying statediff service
+func NewPublicStateDiffAPI(sds IService) *PublicStateDiffAPI {
+	return &PublicStateDiffAPI{
+		sds: sds,
+	}
+}
+
+// StateDiffAt returns a state diff payload at the specific blockheight
+func (api *PublicStateDiffAPI) StateDiffAt(ctx context.Context, blockNumber uint64, params statediff.Params) (*statediff.Payload, error) {
+	return api.sds.StateDiffAt(blockNumber, params)
+}
+
+// StateTrieAt returns a state trie payload at the specific blockheight
+func (api *PublicStateDiffAPI) StateTrieAt(ctx context.Context, blockNumber uint64, params statediff.Params) (*statediff.Payload, error) {
+	return api.sds.StateTrieAt(blockNumber, params)
+}