Merge pull request #33 from vulcanize/update

fix CLI bug
2021-10-20 16:28:39 -05:00 · 2021-10-20 16:25:52 -05:00 · 2021-10-19 17:25:50 -05:00 · 2021-10-19 16:49:04 -05:00 · 2021-10-19 16:19:44 -05:00 · 2021-10-19 20:03:59 +05:30
24 changed files with 1744 additions and 823 deletions
@@ -0,0 +1,25 @@
+name: Docker Compose Build
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Run docker build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Get the version
+        id: vars
+        run: echo ::set-output name=sha::$(echo ${GITHUB_SHA:0:7})
+      - name: Run docker build
+        run: make docker-build
+      - name: Tag docker image
+        run: docker tag vulcanize/eth-statediff-service docker.pkg.github.com/vulcanize/eth-statediff-service/eth-statediff-service:${{steps.vars.outputs.sha}}
+      - name: Docker Login
+        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login https://docker.pkg.github.com -u vulcanize --password-stdin
+      - name: Docker Push
+        run: docker push docker.pkg.github.com/vulcanize/eth-statediff-service/eth-statediff-service:${{steps.vars.outputs.sha}}
+
@@ -0,0 +1,12 @@
+name: Docker Build
+
+on: [pull_request]
+
+jobs:
+  build:
+    name: Run docker build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run docker build
+        run: make docker-build
@@ -0,0 +1,25 @@
+name: Publish Docker image
+on:
+  release:
+    types: [published]
+jobs:
+  push_to_registries:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get the version
+        id: vars
+        run: |
+          echo ::set-output name=sha::$(echo ${GITHUB_SHA:0:7})
+          echo ::set-output name=tag::$(echo ${GITHUB_REF#refs/tags/})
+      - name: Docker Login to Github Registry
+        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login https://docker.pkg.github.com -u vulcanize --password-stdin
+      - name: Docker Pull
+        run: docker pull docker.pkg.github.com/vulcanize/eth-statediff-service/eth-statediff-service:${{steps.vars.outputs.sha}}
+      - name: Docker Login to Docker Registry
+        run: echo ${{ secrets.VULCANIZEJENKINS_PAT }} | docker login -u vulcanizejenkins --password-stdin
+      - name: Tag docker image
+        run: docker tag docker.pkg.github.com/vulcanize/eth-statediff-service/eth-statediff-service:${{steps.vars.outputs.sha}} vulcanize/eth-statediff-service:${{steps.vars.outputs.tag}}
+      - name: Docker Push to Docker Hub
+        run: docker push vulcanize/eth-statediff-service:${{steps.vars.outputs.tag}}
+
@@ -12,9 +12,9 @@ RUN GO111MODULE=on GCO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldfl
 # app container
 FROM alpine

-ARG USER
-ARG CONFIG_FILE
-ARG EXPOSE_PORT
+ARG USER="vdm"
+ARG CONFIG_FILE="./environments/example.toml"
+ARG EXPOSE_PORT=8545
 RUN adduser -Du 5000 $USER
 WORKDIR /app
 RUN chown $USER /app
@@ -0,0 +1,4 @@
+## Build docker image
+.PHONY: docker-build
+docker-build:
+	docker build -t vulcanize/eth-statediff-service .
@@ -1,4 +1,4 @@
-## eth-statediff-service
+# eth-statediff-service

 [![Go Report Card](https://goreportcard.com/badge/github.com/vulcanize/eth-statediff-service)](https://goreportcard.com/report/github.com/vulcanize/eth-statediff-service)

@@ -10,11 +10,31 @@ Stand up a statediffing service directly on top of a go-ethereum leveldb instanc
 This service can serve historical state data over the same rpc interface as
 [statediffing geth](https://github.com/vulcanize/go-ethereum/releases/tag/v1.9.11-statediff-0.0.5) without needing to run a full node

-Usage:
+## Usage

-`./eth-statediff-service serve --config={path to toml config file}`
+### `serve`

-Config:
+To serve state diffs over RPC:
+
+`eth-statediff-service serve --config=<config path>`
+
+Available RPC methods are:
+  * `statediff_stateTrieAt()`
+  * `statediff_streamCodeAndCodeHash()`
+  * `statediff_stateDiffAt()`
+  * `statediff_writeStateDiffAt()`
+
+### `write`
+
+To write state diffs directly to a database:
+
+`eth-statediff-service write --config=<config path>`
+
+This depends on the `database` settings being properly configured.
+
+## Configuration
+
+An example config file:

 ```toml
 [leveldb]
@@ -25,10 +45,24 @@ Config:
    ipcPath = "~/.vulcanize/vulcanize.ipc"
    httpPath = "127.0.0.1:8545"

+[write]
+    ranges = [[1, 2], [3, 4]]
+[write.params]
+    IntermediateStateNodes   = true
+    IntermediateStorageNodes = false
+    IncludeBlock             = true
+    IncludeReceipts          = true
+    IncludeTD                = true
+    IncludeCode              = false
+
+[statediff]
+    workers = 4
+
 [log]
-    file = ""
+    file = "~/.vulcanize/statediff.log"
    level = "info"

 [eth]
    chainID = 1
+
 ```
@@ -0,0 +1,64 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// 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 cmd
+
+import (
+	"github.com/spf13/viper"
+
+	pg "github.com/ethereum/go-ethereum/statediff/indexer/postgres"
+)
+
+const (
+	ETH_NODE_ID       = "ETH_NODE_ID"
+	ETH_CLIENT_NAME   = "ETH_CLIENT_NAME"
+	ETH_GENESIS_BLOCK = "ETH_GENESIS_BLOCK"
+	ETH_NETWORK_ID    = "ETH_NETWORK_ID"
+	ETH_CHAIN_ID      = "ETH_CHAIN_ID"
+
+	DB_CACHE_SIZE_MB   = "DB_CACHE_SIZE_MB"
+	TRIE_CACHE_SIZE_MB = "TRIE_CACHE_SIZE_MB"
+	LVLDB_PATH         = "LVLDB_PATH"
+	LVLDB_ANCIENT      = "LVLDB_ANCIENT"
+	STATEDIFF_WORKERS  = "STATEDIFF_WORKERS"
+	WRITE_SERVER       = "WRITE_SERVER"
+)
+
+// Bind env vars for eth node and DB configuration
+func init() {
+	viper.BindEnv("ethereum.nodeID", ETH_NODE_ID)
+	viper.BindEnv("ethereum.clientName", ETH_CLIENT_NAME)
+	viper.BindEnv("ethereum.genesisBlock", ETH_GENESIS_BLOCK)
+	viper.BindEnv("ethereum.networkID", ETH_NETWORK_ID)
+	viper.BindEnv("ethereum.chainID", ETH_CHAIN_ID)
+
+	viper.BindEnv("database.name", pg.DATABASE_NAME)
+	viper.BindEnv("database.hostname", pg.DATABASE_HOSTNAME)
+	viper.BindEnv("database.port", pg.DATABASE_PORT)
+	viper.BindEnv("database.user", pg.DATABASE_USER)
+	viper.BindEnv("database.password", pg.DATABASE_PASSWORD)
+	viper.BindEnv("database.maxIdle", pg.DATABASE_MAX_IDLE_CONNECTIONS)
+	viper.BindEnv("database.maxOpen", pg.DATABASE_MAX_OPEN_CONNECTIONS)
+	viper.BindEnv("database.maxLifetime", pg.DATABASE_MAX_CONN_LIFETIME)
+
+	viper.BindEnv("cache.database", DB_CACHE_SIZE_MB)
+	viper.BindEnv("cache.trie", TRIE_CACHE_SIZE_MB)
+
+	viper.BindEnv("leveldb.path", LVLDB_PATH)
+	viper.BindEnv("leveldb.ancient", LVLDB_ANCIENT)
+
+	viper.BindEnv("statediff.workers", STATEDIFF_WORKERS)
+}
@@ -21,6 +21,8 @@ import (
 	"os"
 	"strings"

+	"github.com/ethereum/go-ethereum/statediff/indexer/node"
+	"github.com/ethereum/go-ethereum/statediff/indexer/postgres"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -45,7 +47,7 @@ func Execute() {
 }

 func initFuncs(cmd *cobra.Command, args []string) {
-	logfile := viper.GetString("logfile")
+	logfile := viper.GetString("log.file")
 	if logfile != "" {
 		file, err := os.OpenFile(logfile,
 			os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
@@ -85,12 +87,45 @@ func init() {

 	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file location")
 	rootCmd.PersistentFlags().String("log-file", "", "file path for logging")
-	rootCmd.PersistentFlags().String("log-level", log.InfoLevel.String(), "log level (trace, debug, info, warn, error, fatal, panic")
+	rootCmd.PersistentFlags().String("log-level", log.InfoLevel.String(),
+		"log level (trace, debug, info, warn, error, fatal, panic")
+
+	rootCmd.PersistentFlags().String("leveldb-path", "", "path to primary datastore")
+	rootCmd.PersistentFlags().String("ancient-path", "", "path to ancient datastore")
 	rootCmd.PersistentFlags().Int("workers", 0, "number of concurrent workers to use")

+	rootCmd.PersistentFlags().String("database-name", "vulcanize_public", "database name")
+	rootCmd.PersistentFlags().Int("database-port", 5432, "database port")
+	rootCmd.PersistentFlags().String("database-hostname", "localhost", "database hostname")
+	rootCmd.PersistentFlags().String("database-user", "", "database user")
+	rootCmd.PersistentFlags().String("database-password", "", "database password")
+
+	rootCmd.PersistentFlags().String("eth-node-id", "", "eth node id")
+	rootCmd.PersistentFlags().String("eth-client-name", "Geth", "eth client name")
+	rootCmd.PersistentFlags().String("eth-genesis-block",
+		"0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3", "eth genesis block hash")
+	rootCmd.PersistentFlags().String("eth-network-id", "1", "eth network id")
+	rootCmd.PersistentFlags().String("eth-chain-id", "1", "eth chain id")
+	rootCmd.PersistentFlags().Int("cache-db", 1024, "megabytes of memory allocated to database cache")
+	rootCmd.PersistentFlags().Int("cache-trie", 1024, "Megabytes of memory allocated to trie cache")
+
 	viper.BindPFlag("log.file", rootCmd.PersistentFlags().Lookup("log-file"))
 	viper.BindPFlag("log.level", rootCmd.PersistentFlags().Lookup("log-level"))
 	viper.BindPFlag("statediff.workers", rootCmd.PersistentFlags().Lookup("workers"))
+	viper.BindPFlag("leveldb.path", rootCmd.PersistentFlags().Lookup("leveldb-path"))
+	viper.BindPFlag("leveldb.ancient", rootCmd.PersistentFlags().Lookup("ancient-path"))
+	viper.BindPFlag("database.name", rootCmd.PersistentFlags().Lookup("database-name"))
+	viper.BindPFlag("database.port", rootCmd.PersistentFlags().Lookup("database-port"))
+	viper.BindPFlag("database.hostname", rootCmd.PersistentFlags().Lookup("database-hostname"))
+	viper.BindPFlag("database.user", rootCmd.PersistentFlags().Lookup("database-user"))
+	viper.BindPFlag("database.password", rootCmd.PersistentFlags().Lookup("database-password"))
+	viper.BindPFlag("ethereum.nodeID", rootCmd.PersistentFlags().Lookup("eth-node-id"))
+	viper.BindPFlag("ethereum.clientName", rootCmd.PersistentFlags().Lookup("eth-client-name"))
+	viper.BindPFlag("ethereum.genesisBlock", rootCmd.PersistentFlags().Lookup("eth-genesis-block"))
+	viper.BindPFlag("ethereum.networkID", rootCmd.PersistentFlags().Lookup("eth-network-id"))
+	viper.BindPFlag("ethereum.chainID", rootCmd.PersistentFlags().Lookup("eth-chain-id"))
+	viper.BindPFlag("cache.database", rootCmd.PersistentFlags().Lookup("cache-db"))
+	viper.BindPFlag("cache.trie", rootCmd.PersistentFlags().Lookup("cache-trie"))
 }

 func initConfig() {
@@ -105,3 +140,31 @@ func initConfig() {
 		log.Warn("No config file passed with --config flag")
 	}
 }
+
+func GetEthNodeInfo() node.Info {
+	return node.Info{
+		ID:           viper.GetString("ethereum.nodeID"),
+		ClientName:   viper.GetString("ethereum.clientName"),
+		GenesisBlock: viper.GetString("ethereum.genesisBlock"),
+		NetworkID:    viper.GetString("ethereum.networkID"),
+		ChainID:      viper.GetUint64("ethereum.chainID"),
+	}
+}
+
+func GetDBParams() postgres.ConnectionParams {
+	return postgres.ConnectionParams{
+		Name:     viper.GetString("database.name"),
+		Hostname: viper.GetString("database.hostname"),
+		Port:     viper.GetInt("database.port"),
+		User:     viper.GetString("database.user"),
+		Password: viper.GetString("database.password"),
+	}
+}
+
+func GetDBConfig() postgres.ConnectionConfig {
+	return postgres.ConnectionConfig{
+		MaxIdle:     viper.GetInt("database.maxIdle"),
+		MaxOpen:     viper.GetInt("database.maxOpen"),
+		MaxLifetime: viper.GetInt("database.maxLifetime"),
+	}
+}
@@ -21,12 +21,17 @@ import (
 	"os/signal"
 	"sync"

+	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/trie"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"

+	ind "github.com/ethereum/go-ethereum/statediff/indexer"
+	"github.com/ethereum/go-ethereum/statediff/indexer/postgres"
+
 	sd "github.com/vulcanize/eth-statediff-service/pkg"
 )

@@ -53,42 +58,63 @@ func serve() {
 	if path == "" || ancientPath == "" {
 		logWithCommand.Fatal("require a valid eth leveldb primary datastore path and ancient datastore path")
 	}
-	chainID := viper.GetUint64("eth.chainID")
-	config, err := chainConfig(chainID)
+
+	nodeInfo := GetEthNodeInfo()
+	config, err := chainConfig(nodeInfo.ChainID)
 	if err != nil {
 		logWithCommand.Fatal(err)
 	}

 	// create leveldb reader
-	logWithCommand.Info("creating leveldb reader")
-	lvlDBReader, err := sd.NewLvlDBReader(path, ancientPath, config)
+	logWithCommand.Info("Creating leveldb reader")
+	conf := sd.ReaderConfig{
+		TrieConfig: &trie.Config{
+			Cache:     viper.GetInt("cache.trie"),
+			Journal:   "",
+			Preimages: false,
+		},
+		ChainConfig: config,
+		Path:        path,
+		AncientPath: ancientPath,
+		DBCacheSize: viper.GetInt("cache.database"),
+	}
+	lvlDBReader, err := sd.NewLvlDBReader(conf)
 	if err != nil {
 		logWithCommand.Fatal(err)
 	}

 	// create statediff service
-	logWithCommand.Info("creating statediff service")
-	statediffService, err := sd.NewStateDiffService(
-		lvlDBReader, sd.Config{Workers: viper.GetUint("statediff.workers")})
+	logWithCommand.Info("Creating statediff service")
+	db, err := postgres.NewDB(postgres.DbConnectionString(GetDBParams()), GetDBConfig(), nodeInfo)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	indexer, err := ind.NewStateDiffIndexer(config, db)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	statediffService, err := sd.NewStateDiffService(lvlDBReader, indexer, viper.GetUint("statediff.workers"))
 	if err != nil {
 		logWithCommand.Fatal(err)
 	}

 	// start service and servers
-	logWithCommand.Info("starting statediff service")
+	logWithCommand.Info("Starting statediff service")
 	wg := new(sync.WaitGroup)
 	go statediffService.Loop(wg)
-	logWithCommand.Info("starting rpc servers")
+	logWithCommand.Info("Starting RPC servers")
 	if err := startServers(statediffService); err != nil {
 		logWithCommand.Fatal(err)
 	}
-	logWithCommand.Info("rpc servers successfully spun up; awaiting requests")
+	logWithCommand.Info("RPC servers successfully spun up; awaiting requests")

 	// clean shutdown
 	shutdown := make(chan os.Signal)
 	signal.Notify(shutdown, os.Interrupt)
 	<-shutdown
-	logWithCommand.Info("received interrupt signal, shutting down")
+	logWithCommand.Info("Received interrupt signal, shutting down")
 	statediffService.Stop()
 	wg.Wait()
 }
@@ -96,20 +122,16 @@ func serve() {
 func init() {
 	rootCmd.AddCommand(serveCmd)

-	serveCmd.PersistentFlags().String("leveldb-path", "", "path to primary datastore")
-	serveCmd.PersistentFlags().String("ancient-path", "", "path to ancient datastore")
-	serveCmd.PersistentFlags().Uint("chain-id", 1, "ethereum chain id (mainnet = 1)")
 	serveCmd.PersistentFlags().String("http-path", "", "vdb server http path")
 	serveCmd.PersistentFlags().String("ipc-path", "", "vdb server ipc path")

-	viper.BindPFlag("leveldb.path", serveCmd.PersistentFlags().Lookup("leveldb-path"))
-	viper.BindPFlag("leveldb.ancient", serveCmd.PersistentFlags().Lookup("ancient-path"))
-	viper.BindPFlag("eth.chainID", serveCmd.PersistentFlags().Lookup("chain-id"))
 	viper.BindPFlag("server.httpPath", serveCmd.PersistentFlags().Lookup("http-path"))
 	viper.BindPFlag("server.ipcPath", serveCmd.PersistentFlags().Lookup("ipc-path"))
 }

 func startServers(serv sd.IService) error {
+	viper.BindEnv("server.ipcPath", "SERVER_IPC_PATH")
+	viper.BindEnv("server.httpPath", "SERVER_HTTP_PATH")
 	ipcPath := viper.GetString("server.ipcPath")
 	httpPath := viper.GetString("server.httpPath")
 	if ipcPath == "" && httpPath == "" {
@@ -124,7 +146,8 @@ func startServers(serv sd.IService) error {
 	}
 	if httpPath != "" {
 		logWithCommand.Info("starting up HTTP server")
-		if _, _, err := rpc.StartHTTPEndpoint(httpPath, serv.APIs(), []string{sd.APIName}, nil, nil, rpc.HTTPTimeouts{}); err != nil {
+		handler := rpc.NewServer()
+		if _, _, err := node.StartHTTPEndpoint(httpPath, rpc.HTTPTimeouts{}, handler); err != nil {
 			return err
 		}
 	}
@@ -136,7 +159,7 @@ func chainConfig(chainID uint64) (*params.ChainConfig, error) {
 	case 1:
 		return params.MainnetChainConfig, nil
 	case 3:
-		return params.TestnetChainConfig, nil // Ropsten
+		return params.RopstenChainConfig, nil // Ropsten
 	case 4:
 		return params.RinkebyChainConfig, nil
 	case 5:
@@ -0,0 +1,189 @@
+// Copyright © 2019 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 cmd
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+	"sync"
+	"time"
+
+	gethsd "github.com/ethereum/go-ethereum/statediff"
+	ind "github.com/ethereum/go-ethereum/statediff/indexer"
+	"github.com/ethereum/go-ethereum/statediff/indexer/postgres"
+	"github.com/ethereum/go-ethereum/trie"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	sd "github.com/vulcanize/eth-statediff-service/pkg"
+)
+
+var writeCmd = &cobra.Command{
+	Use:   "write",
+	Short: "Write statediffs directly to DB for preconfigured block ranges",
+	Long: `Usage
+
+./eth-statediff-service write --config={path to toml config file}`,
+	Run: func(cmd *cobra.Command, args []string) {
+		subCommand = cmd.CalledAs()
+		logWithCommand = *logrus.WithField("SubCommand", subCommand)
+		write()
+	},
+}
+
+type blockRange [2]uint64
+
+func init() {
+	rootCmd.AddCommand(writeCmd)
+	writeCmd.PersistentFlags().String("write-api", "", "starts a server which handles write request through endpoints")
+	viper.BindPFlag("write.serve", writeCmd.PersistentFlags().Lookup("write-api"))
+}
+
+func write() {
+	logWithCommand.Info("Starting statediff writer")
+	// load params
+	viper.BindEnv("write.serve", WRITE_SERVER)
+	addr := viper.GetString("write.serve")
+	path := viper.GetString("leveldb.path")
+	ancientPath := viper.GetString("leveldb.ancient")
+	if path == "" || ancientPath == "" {
+		logWithCommand.Fatal("require a valid eth leveldb primary datastore path and ancient datastore path")
+	}
+
+	nodeInfo := GetEthNodeInfo()
+	config, err := chainConfig(nodeInfo.ChainID)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	// create leveldb reader
+	logWithCommand.Info("Creating leveldb reader")
+	conf := sd.ReaderConfig{
+		TrieConfig: &trie.Config{
+			Cache:     viper.GetInt("cache.trie"),
+			Journal:   "",
+			Preimages: false,
+		},
+		ChainConfig: config,
+		Path:        path,
+		AncientPath: ancientPath,
+		DBCacheSize: viper.GetInt("cache.database"),
+	}
+	lvlDBReader, err := sd.NewLvlDBReader(conf)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	// create statediff service
+	logWithCommand.Info("Creating statediff service")
+	db, err := postgres.NewDB(postgres.DbConnectionString(GetDBParams()), GetDBConfig(), nodeInfo)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	indexer, err := ind.NewStateDiffIndexer(config, db)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	statediffService, err := sd.NewStateDiffService(lvlDBReader, indexer, viper.GetUint("statediff.workers"))
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+
+	// Read all defined block ranges, write statediffs to database
+	var blockRanges []blockRange
+	diffParams := gethsd.Params{ // todo: configurable?
+		IntermediateStateNodes:   true,
+		IntermediateStorageNodes: true,
+		IncludeBlock:             true,
+		IncludeReceipts:          true,
+		IncludeTD:                true,
+		IncludeCode:              true,
+	}
+	viper.UnmarshalKey("write.ranges", &blockRanges)
+	viper.UnmarshalKey("write.params", &diffParams)
+
+	blockRangesCh := make(chan blockRange, 100)
+	go func() {
+		for _, r := range blockRanges {
+			blockRangesCh <- r
+		}
+		if addr == "" {
+			close(blockRangesCh)
+			return
+		}
+		startServer(addr, blockRangesCh)
+	}()
+
+	processRanges(statediffService, diffParams, blockRangesCh)
+}
+
+func startServer(addr string, blockRangesCh chan<- blockRange) {
+	handler := func(w http.ResponseWriter, req *http.Request) {
+		start, err := strconv.Atoi(req.URL.Query().Get("start"))
+		if err != nil {
+			http.Error(w, fmt.Sprintf("failed to parse start value: %v", err), http.StatusInternalServerError)
+			return
+		}
+
+		end, err := strconv.Atoi(req.URL.Query().Get("end"))
+		if err != nil {
+			http.Error(w, fmt.Sprintf("failed to parse end value: %v", err), http.StatusInternalServerError)
+			return
+		}
+
+		select {
+		case blockRangesCh <- blockRange{uint64(start), uint64(end)}:
+		case <-time.After(time.Millisecond * 200):
+			http.Error(w, "server is busy", http.StatusInternalServerError)
+			return
+		}
+
+		fmt.Fprintf(w, "added block range to the queue\n")
+	}
+
+	http.HandleFunc("/writeDiff", handler)
+	logrus.Fatal(http.ListenAndServe(addr, nil))
+}
+
+type diffService interface {
+	WriteStateDiffAt(blockNumber uint64, params gethsd.Params) error
+}
+
+func processRanges(sds diffService, param gethsd.Params, blockRangesCh chan blockRange) {
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for rng := range blockRangesCh {
+			if rng[1] < rng[0] {
+				logWithCommand.Fatal("range ending block number needs to be greater than starting block number")
+			}
+			logrus.Infof("Writing statediffs from block %d to %d", rng[0], rng[1])
+			for height := rng[0]; height <= rng[1]; height++ {
+				err := sds.WriteStateDiffAt(height, param)
+				if err != nil {
+					logrus.Errorf("failed to write state diff for range: %v %v", rng, err)
+				}
+			}
+		}
+	}()
+
+	wg.Wait()
+}
@@ -0,0 +1,76 @@
+package cmd
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	gethsd "github.com/ethereum/go-ethereum/statediff"
+	"github.com/stretchr/testify/require"
+)
+
+type mockService struct {
+	reqCount int
+}
+
+func (ms *mockService) WriteStateDiffAt(_ uint64, _ gethsd.Params) error {
+	ms.reqCount++
+	return nil
+}
+
+func TestProcessRanges(t *testing.T) {
+	blockRangesCh := make(chan blockRange)
+	srv := new(mockService)
+
+	go func() {
+		blockRangesCh <- blockRange{uint64(1), uint64(5)}
+		blockRangesCh <- blockRange{uint64(8), uint64(10)}
+		blockRangesCh <- blockRange{uint64(6), uint64(7)}
+		blockRangesCh <- blockRange{uint64(50), uint64(100)}
+		blockRangesCh <- blockRange{uint64(5), uint64(8)}
+		close(blockRangesCh)
+	}()
+
+	processRanges(srv, gethsd.Params{}, blockRangesCh)
+	require.Equal(t, 65, srv.reqCount)
+}
+
+func TestHttpEndpoint(t *testing.T) {
+	addr := ":11111"
+	queueSize := 5
+	blockRangesCh := make(chan blockRange, queueSize)
+	srv := new(mockService)
+
+	go startServer(addr, blockRangesCh)
+
+	go func() {
+		br := []blockRange{
+			{uint64(1), uint64(5)},
+			{uint64(8), uint64(10)},
+			{uint64(6), uint64(7)},
+			{uint64(50), uint64(100)},
+			{uint64(5), uint64(8)},
+			// Below request should fail since server has queue size of 5
+			{uint64(52), uint64(328)},
+			{uint64(35), uint64(428)},
+			{uint64(45), uint64(844)},
+		}
+
+		for idx, r := range br {
+			res, err := http.Get(fmt.Sprintf("http://localhost:11111/writeDiff?start=%d&end=%d", r[0], r[1]))
+			require.NoError(t, err)
+			require.NotNil(t, res)
+			if idx < queueSize {
+				require.Equal(t, res.StatusCode, 200)
+			} else {
+				require.Equal(t, res.StatusCode, 500)
+			}
+			require.NoError(t, res.Body.Close())
+		}
+		processRanges(srv, gethsd.Params{}, blockRangesCh)
+	}()
+
+	time.Sleep(1 * time.Second)
+	require.Equal(t, 65, srv.reqCount)
+}
@@ -9,9 +9,26 @@
 [statediff]
    workers = 4

+[write]
+    ranges = [
+        [0, 0]
+    ]
+    serve = ":8888"
+
 [log]
    file = ""
    level = "info"

 [eth]
-    chainID = 1
+    chainID = 1
+
+[database]
+    name     = "vulcanize_test"
+    hostname = "localhost"
+    port     = 5432
+    user     = "vulcanize"
+    password = "..."
+
+[cache]
+    database = 1024
+    trie = 1024
@@ -3,11 +3,12 @@ module github.com/vulcanize/eth-statediff-service
 go 1.13

 require (
-	github.com/ethereum/go-ethereum v1.9.11
-	github.com/sirupsen/logrus v1.6.0
-	github.com/spf13/cobra v1.0.0
+	github.com/ethereum/go-ethereum v1.10.9
+	github.com/sirupsen/logrus v1.7.0
+	github.com/spf13/cobra v1.1.1
 	github.com/spf13/viper v1.7.1
-	github.com/vulcanize/go-eth-state-node-iterator v0.0.1-alpha
+	github.com/stretchr/testify v1.7.0
+	github.com/vulcanize/go-eth-state-node-iterator v0.0.1-alpha.0.20211014064906-d23d01ed8191
 )

-replace github.com/ethereum/go-ethereum v1.9.11 => github.com/vulcanize/go-ethereum v1.9.11-statediff-0.0.8
+replace github.com/ethereum/go-ethereum v1.10.9 => github.com/vulcanize/go-ethereum v1.10.10-statediff-0.0.27
@@ -1,15 +1,23 @@
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 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.43.0/go.mod h1:BOSR3VbTLkk6FDC/TcffxP4NF/FFBGA5ku+jvKOP7pg=
 cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigtable v1.2.0/go.mod h1:JcVAOl45lrTmQfLj7T6TxyMzIN/3FGGcFm+2xVAli2o=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+collectd.org v0.3.0/go.mod h1:A/8DzQBkF6abtvrT2j/AU/4tiBgJWYyh0y/oB/4MlWE=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/Azure/azure-pipeline-go v0.2.1/go.mod h1:UGSo8XybXnIGZ3epmeBw7Jdz+HiUVpqIlpz/HKHylF4=
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@@ -24,113 +32,194 @@ github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxB
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 google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
 google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
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 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce h1:+JknDZhAj8YMt7GC73Ei8pv4MzjDUNPHgQWJdtMAaDU=
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-gopkg.in/olebedev/go-duktape.v3 v3.0.0-20190213234257-ec84240a7772/go.mod h1:uAJfkITjFhyEEuUfm7bsmCZRbW5WRq8s9EY8HZ6hCns=
+gopkg.in/olebedev/go-duktape.v3 v3.0.0-20200619000410-60c24ae608a6/go.mod h1:uAJfkITjFhyEEuUfm7bsmCZRbW5WRq8s9EY8HZ6hCns=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
-gopkg.in/sourcemap.v1 v1.0.5/go.mod h1:2RlvNNSMglmRrcvhfuzp4hQHwOtjxlbjX7UPY/GXb78=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/urfave/cli.v1 v1.20.0 h1:NdAVW6RYxDif9DhDHaAortIu956m2c0v+09AZBPTbE0=
 gopkg.in/urfave/cli.v1 v1.20.0/go.mod h1:vuBzUtMdQeixQj8LVd+/98pzhxNGQoyuPBlsXHOQNO0=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.1.3/go.mod h1:NgwopIslSNH47DimFoV78dnkksY2EFtX0ajyb3K/las=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
@@ -49,3 +49,8 @@ func (api *PublicStateDiffAPI) StateDiffAt(ctx context.Context, blockNumber uint
 func (api *PublicStateDiffAPI) StateTrieAt(ctx context.Context, blockNumber uint64, params sd.Params) (*sd.Payload, error) {
 	return api.sds.StateTrieAt(blockNumber, params)
 }
+
+// WriteStateDiffAt writes a state diff object directly to DB at the specific blockheight
+func (api *PublicStateDiffAPI) WriteStateDiffAt(ctx context.Context, blockNumber uint64, params sd.Params) error {
+	return api.sds.WriteStateDiffAt(blockNumber, params)
+}
@@ -31,9 +31,11 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rlp"
+	sd "github.com/ethereum/go-ethereum/statediff"
+	sdtrie "github.com/ethereum/go-ethereum/statediff/trie"
+	sdtypes "github.com/ethereum/go-ethereum/statediff/types"
 	"github.com/ethereum/go-ethereum/trie"

-	sd "github.com/ethereum/go-ethereum/statediff"
 	iter "github.com/vulcanize/go-eth-state-node-iterator"
 )

@@ -48,6 +50,7 @@ var (
 type Builder interface {
 	BuildStateDiffObject(args sd.Args, params sd.Params) (sd.StateObject, error)
 	BuildStateTrieObject(current *types.Block) (sd.StateObject, error)
+	WriteStateDiffObject(args sd.StateRoots, params sd.Params, output sdtypes.StateNodeSink, codeOutput sdtypes.CodeSink) error
 }

 type builder struct {
@@ -59,6 +62,48 @@ type iterPair struct {
 	older, newer trie.NodeIterator
 }

+func resolveNode(it trie.NodeIterator, trieDB *trie.Database) (sdtypes.StateNode, []interface{}, error) {
+	nodePath := make([]byte, len(it.Path()))
+	copy(nodePath, it.Path())
+	node, err := trieDB.Node(it.Hash())
+	if err != nil {
+		return sdtypes.StateNode{}, nil, err
+	}
+	var nodeElements []interface{}
+	if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
+		return sdtypes.StateNode{}, nil, err
+	}
+	ty, err := sdtrie.CheckKeyType(nodeElements)
+	if err != nil {
+		return sdtypes.StateNode{}, nil, err
+	}
+	return sdtypes.StateNode{
+		NodeType:  ty,
+		Path:      nodePath,
+		NodeValue: node,
+	}, nodeElements, nil
+}
+
+// convenience
+func stateNodeAppender(nodes *[]sdtypes.StateNode) sdtypes.StateNodeSink {
+	return func(node sdtypes.StateNode) error {
+		*nodes = append(*nodes, node)
+		return nil
+	}
+}
+func storageNodeAppender(nodes *[]sdtypes.StorageNode) sdtypes.StorageNodeSink {
+	return func(node sdtypes.StorageNode) error {
+		*nodes = append(*nodes, node)
+		return nil
+	}
+}
+func codeMappingAppender(data *[]sdtypes.CodeAndCodeHash) sdtypes.CodeSink {
+	return func(c sdtypes.CodeAndCodeHash) error {
+		*data = append(*data, c)
+		return nil
+	}
+}
+
 // NewBuilder is used to create a statediff builder
 func NewBuilder(stateCache state.Database, workers uint) (Builder, error) {
 	if workers == 0 {
@@ -92,68 +137,32 @@ func (sdb *builder) BuildStateTrieObject(current *types.Block) (sd.StateObject,
 	}, nil
 }

-func resolveNode(it trie.NodeIterator, trieDB *trie.Database) (sd.StateNode, []interface{}, error) {
-	nodePath := make([]byte, len(it.Path()))
-	copy(nodePath, it.Path())
-	node, err := trieDB.Node(it.Hash())
-	if err != nil {
-		return sd.StateNode{}, nil, err
-	}
-	var nodeElements []interface{}
-	if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
-		return sd.StateNode{}, nil, err
-	}
-	ty, err := sd.CheckKeyType(nodeElements)
-	if err != nil {
-		return sd.StateNode{}, nil, err
-	}
-	return sd.StateNode{
-		NodeType:  ty,
-		Path:      nodePath,
-		NodeValue: node,
-	}, nodeElements, nil
-}
-
-func (sdb *builder) buildStateTrie(it trie.NodeIterator) ([]sd.StateNode, []sd.CodeAndCodeHash, error) {
-	stateNodes := make([]sd.StateNode, 0)
-	codeAndCodeHashes := make([]sd.CodeAndCodeHash, 0)
+func (sdb *builder) buildStateTrie(it trie.NodeIterator) ([]sdtypes.StateNode, []sdtypes.CodeAndCodeHash, error) {
+	stateNodes := make([]sdtypes.StateNode, 0)
+	codeAndCodeHashes := make([]sdtypes.CodeAndCodeHash, 0)
 	for it.Next(true) {
-		// skip value nodes and null nodes
+		// skip value nodes
 		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
 			continue
 		}
-		nodePath := make([]byte, len(it.Path()))
-		copy(nodePath, it.Path())
-		node, err := sdb.stateCache.TrieDB().Node(it.Hash())
+		node, nodeElements, err := resolveNode(it, sdb.stateCache.TrieDB())
 		if err != nil {
 			return nil, nil, err
 		}
-		var nodeElements []interface{}
-		if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
-			return nil, nil, err
-		}
-		ty, err := sd.CheckKeyType(nodeElements)
-		if err != nil {
-			return nil, nil, err
-		}
-		switch ty {
-		case sd.Leaf:
-			var account state.Account
+		switch node.NodeType {
+		case sdtypes.Leaf:
+			var account types.StateAccount
 			if err := rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
-				return nil, nil, fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", nodePath, err)
+				return nil, nil, fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", node.Path, err)
 			}
 			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
-			valueNodePath := append(nodePath, partialPath...)
+			valueNodePath := append(node.Path, partialPath...)
 			encodedPath := trie.HexToCompact(valueNodePath)
 			leafKey := encodedPath[1:]
-			node := sd.StateNode{
-				NodeType:  ty,
-				Path:      nodePath,
-				LeafKey:   leafKey,
-				NodeValue: node,
-			}
+			node.LeafKey = leafKey
 			if !bytes.Equal(account.CodeHash, nullCodeHash) {
-				storageNodes, err := sdb.buildStorageNodesEventual(account.Root, nil, true)
+				var storageNodes []sdtypes.StorageNode
+				err := sdb.buildStorageNodesEventual(account.Root, nil, true, storageNodeAppender(&storageNodes))
 				if err != nil {
 					return nil, nil, fmt.Errorf("failed building eventual storage diffs for account %+v\r\nerror: %v", account, err)
 				}
@@ -164,27 +173,41 @@ func (sdb *builder) buildStateTrie(it trie.NodeIterator) ([]sd.StateNode, []sd.C
 				if err != nil {
 					return nil, nil, fmt.Errorf("failed to retrieve code for codehash %s\r\n error: %v", codeHash.String(), err)
 				}
-				codeAndCodeHashes = append(codeAndCodeHashes, sd.CodeAndCodeHash{
+				codeAndCodeHashes = append(codeAndCodeHashes, sdtypes.CodeAndCodeHash{
 					Hash: codeHash,
 					Code: code,
 				})
 			}
 			stateNodes = append(stateNodes, node)
-		case sd.Extension, sd.Branch:
-			stateNodes = append(stateNodes, sd.StateNode{
-				NodeType:  ty,
-				Path:      nodePath,
-				NodeValue: node,
-			})
+		case sdtypes.Extension, sdtypes.Branch:
+			stateNodes = append(stateNodes, node)
 		default:
-			return nil, nil, fmt.Errorf("unexpected node type %s", ty)
+			return nil, nil, fmt.Errorf("unexpected node type %s", node.NodeType)
 		}
 	}
 	return stateNodes, codeAndCodeHashes, it.Error()
 }

-// BuildStateDiff builds a statediff object from two blocks and the provided parameters
+// BuildStateDiffObject builds a statediff object from two blocks and the provided parameters
 func (sdb *builder) BuildStateDiffObject(args sd.Args, params sd.Params) (sd.StateObject, error) {
+	var stateNodes []sdtypes.StateNode
+	var codeAndCodeHashes []sdtypes.CodeAndCodeHash
+	err := sdb.WriteStateDiffObject(
+		sd.StateRoots{OldStateRoot: args.OldStateRoot, NewStateRoot: args.NewStateRoot},
+		params, stateNodeAppender(&stateNodes), codeMappingAppender(&codeAndCodeHashes))
+	if err != nil {
+		return sd.StateObject{}, err
+	}
+	return sd.StateObject{
+		BlockHash:         args.BlockHash,
+		BlockNumber:       args.BlockNumber,
+		Nodes:             stateNodes,
+		CodeAndCodeHashes: codeAndCodeHashes,
+	}, nil
+}
+
+// Writes a statediff object to output callback
+func (sdb *builder) WriteStateDiffObject(args sd.StateRoots, params sd.Params, output sdtypes.StateNodeSink, codeOutput sdtypes.CodeSink) error {
 	if len(params.WatchedAddresses) > 0 {
 		// if we are watching only specific accounts then we are only diffing leaf nodes
 		log.Info("Ignoring intermediate state nodes because WatchedAddresses was passed")
@@ -194,95 +217,95 @@ func (sdb *builder) BuildStateDiffObject(args sd.Args, params sd.Params) (sd.Sta
 	// Load tries for old and new states
 	oldTrie, err := sdb.stateCache.OpenTrie(args.OldStateRoot)
 	if err != nil {
-		return sd.StateObject{}, fmt.Errorf("error creating trie for old state root: %v", err)
+		return fmt.Errorf("error creating trie for old state root: %v", err)
 	}
 	newTrie, err := sdb.stateCache.OpenTrie(args.NewStateRoot)
 	if err != nil {
-		return sd.StateObject{}, fmt.Errorf("error creating trie for new state root: %v", err)
+		return fmt.Errorf("error creating trie for new state root: %v", err)
 	}

 	// Split old and new tries into corresponding subtrie iterators
 	oldIterFac := iter.NewSubtrieIteratorFactory(oldTrie, sdb.numWorkers)
 	newIterFac := iter.NewSubtrieIteratorFactory(newTrie, sdb.numWorkers)
-	iterChan := make(chan []iterPair, sdb.numWorkers)

 	// Create iterators ahead of time to avoid race condition in state.Trie access
+	// We do two state iterations per subtrie: one for new/updated nodes,
+	// one for deleted/updated nodes; prepare 2 iterator instances for each task
+	var iterPairs [][]iterPair
 	for i := uint(0); i < sdb.numWorkers; i++ {
-		// two state iterations per diff build
-		iterChan <- []iterPair{
-			iterPair{
-				older: oldIterFac.IteratorAt(i),
-				newer: newIterFac.IteratorAt(i),
-			},
-			iterPair{
-				older: oldIterFac.IteratorAt(i),
-				newer: newIterFac.IteratorAt(i),
-			},
+		iterPairs = append(iterPairs, []iterPair{
+			iterPair{older: oldIterFac.IteratorAt(i), newer: newIterFac.IteratorAt(i)},
+			iterPair{older: oldIterFac.IteratorAt(i), newer: newIterFac.IteratorAt(i)},
+		})
+	}
+
+	// Dispatch workers to process trie data; sync and collect results here via channels
+	nodeChan := make(chan sdtypes.StateNode)
+	codeChan := make(chan sdtypes.CodeAndCodeHash)
+
+	go func() {
+		nodeSender := func(node sdtypes.StateNode) error { nodeChan <- node; return nil }
+		codeSender := func(code sdtypes.CodeAndCodeHash) error { codeChan <- code; return nil }
+		var wg sync.WaitGroup
+
+		for w := uint(0); w < sdb.numWorkers; w++ {
+			wg.Add(1)
+			go func(worker uint) {
+				defer wg.Done()
+				sdb.buildStateDiff(iterPairs[worker], params, nodeSender, codeSender)
+			}(w)
+		}
+		wg.Wait()
+		close(nodeChan)
+		close(codeChan)
+	}()
+
+	for nodeChan != nil || codeChan != nil {
+		select {
+		case node, more := <-nodeChan:
+			if more {
+				if err := output(node); err != nil {
+					return err
+				}
+			} else {
+				nodeChan = nil
+			}
+		case codeAndCodeHash, more := <-codeChan:
+			if more {
+				if err := codeOutput(codeAndCodeHash); err != nil {
+					return err
+				}
+			} else {
+				codeChan = nil
+			}
 		}
 	}

-	type packet struct {
-		nodes []sd.StateNode
-		codes []sd.CodeAndCodeHash
-	}
-
-	packetChan := make(chan packet)
-	var wg sync.WaitGroup
-
-	for w := uint(0); w < sdb.numWorkers; w++ {
-		wg.Add(1)
-		go func(iterChan <-chan []iterPair) error {
-			defer wg.Done()
-			if iters, more := <-iterChan; more {
-				subtrieNodes, subtrieCodes, err := sdb.buildStateDiff(iters, params)
-				if err != nil {
-					return err
-				}
-				packetChan <- packet{
-					nodes: subtrieNodes,
-					codes: subtrieCodes,
-				}
-			}
-			return nil
-		}(iterChan)
-	}
-
-	go func() {
-		defer close(packetChan)
-		defer close(iterChan)
-		wg.Wait()
-	}()
-
-	stateNodes := make([]sd.StateNode, 0)
-	codeAndCodeHashes := make([]sd.CodeAndCodeHash, 0)
-	for packet := range packetChan {
-		stateNodes = append(stateNodes, packet.nodes...)
-		codeAndCodeHashes = append(codeAndCodeHashes, packet.codes...)
-	}
-
-	return sd.StateObject{
-		BlockHash:         args.BlockHash,
-		BlockNumber:       args.BlockNumber,
-		Nodes:             stateNodes,
-		CodeAndCodeHashes: codeAndCodeHashes,
-	}, nil
+	return nil
 }

-func (sdb *builder) buildStateDiff(args []iterPair, params sd.Params) ([]sd.StateNode, []sd.CodeAndCodeHash, error) {
+func (sdb *builder) buildStateDiff(args []iterPair, params sd.Params, output sdtypes.StateNodeSink, codeOutput sdtypes.CodeSink) error {
 	// collect a slice of all the intermediate nodes that were touched and exist at B
 	// a map of their leafkey to all the accounts that were touched and exist at B
 	// and a slice of all the paths for the nodes in both of the above sets
-	createdOrUpdatedIntermediateNodes, diffAccountsAtB, diffPathsAtB, err := sdb.createdAndUpdatedState(
-		args[0], params.WatchedAddresses, params.IntermediateStateNodes)
+	var diffAccountsAtB AccountMap
+	var diffPathsAtB map[string]bool
+	var err error
+	if params.IntermediateStateNodes {
+		diffAccountsAtB, diffPathsAtB, err = sdb.createdAndUpdatedStateWithIntermediateNodes(args[0], output)
+	} else {
+		diffAccountsAtB, diffPathsAtB, err = sdb.createdAndUpdatedState(args[0], params.WatchedAddresses)
+	}
+
 	if err != nil {
-		return nil, nil, fmt.Errorf("error collecting createdAndUpdatedNodes: %v", err)
+		return fmt.Errorf("error collecting createdAndUpdatedNodes: %v", err)
 	}

 	// collect a slice of all the nodes that existed at a path in A that doesn't exist in B
 	// a map of their leafkey to all the accounts that were touched and exist at A
-	emptiedPaths, diffAccountsAtA, err := sdb.deletedOrUpdatedState(args[1], diffPathsAtB)
+	diffAccountsAtA, err := sdb.deletedOrUpdatedState(args[1], diffPathsAtB, output)
 	if err != nil {
-		return nil, nil, fmt.Errorf("error collecting deletedOrUpdatedNodes: %v", err)
+		return fmt.Errorf("error collecting deletedOrUpdatedNodes: %v", err)
 	}

 	// collect and sort the leafkey keys for both account mappings into a slice
@@ -295,57 +318,43 @@ func (sdb *builder) buildStateDiff(args []iterPair, params sd.Params) ([]sd.Stat
 	// and leaving the truly created or deleted keys in place
 	updatedKeys := findIntersection(createKeys, deleteKeys)

-	// build the diff nodes for the updated accounts using the mappings at both A and B
-	// as directed by the keys found as the intersection of the two
-	updatedAccounts, err := sdb.buildAccountUpdates(
+	// build the diff nodes for the updated accounts using the mappings at both A and B as directed by the keys found as the intersection of the two
+	err = sdb.buildAccountUpdates(
 		diffAccountsAtB, diffAccountsAtA, updatedKeys,
-		params.WatchedStorageSlots, params.IntermediateStorageNodes)
+		params.WatchedStorageSlots, params.IntermediateStorageNodes, output)
 	if err != nil {
-		return nil, nil, fmt.Errorf("error building diff for updated accounts: %v", err)
+		return fmt.Errorf("error building diff for updated accounts: %v", err)
 	}
 	// build the diff nodes for created accounts
-	createdAccounts, codeAndCodeHashes, err := sdb.buildAccountCreations(
-		diffAccountsAtB, params.WatchedStorageSlots, params.IntermediateStorageNodes)
+	err = sdb.buildAccountCreations(diffAccountsAtB, params.WatchedStorageSlots, params.IntermediateStorageNodes, output, codeOutput)
 	if err != nil {
-		return nil, nil, fmt.Errorf("error building diff for created accounts: %v", err)
+		return fmt.Errorf("error building diff for created accounts: %v", err)
 	}
-
-	// assemble all of the nodes into the statediff object, including the intermediate nodes
-	nodes := append(
-		append(
-			append(updatedAccounts, createdAccounts...),
-			createdOrUpdatedIntermediateNodes...,
-		),
-		emptiedPaths...)
-
-	return nodes, codeAndCodeHashes, nil
+	return nil
 }

 // createdAndUpdatedState returns
-// a slice of all the intermediate nodes that exist in a different state at B than A
 // a mapping of their leafkeys to all the accounts that exist in a different state at B than A
 // and a slice of the paths for all of the nodes included in both
-func (sdb *builder) createdAndUpdatedState(iters iterPair, watchedAddresses []common.Address, intermediates bool) ([]sd.StateNode, AccountMap, map[string]bool, error) {
-	createdOrUpdatedIntermediateNodes := make([]sd.StateNode, 0)
+func (sdb *builder) createdAndUpdatedState(iters iterPair, watchedAddresses []common.Address) (AccountMap, map[string]bool, error) {
 	diffPathsAtB := make(map[string]bool)
 	diffAcountsAtB := make(AccountMap)
 	it, _ := trie.NewDifferenceIterator(iters.older, iters.newer)
 	for it.Next(true) {
-		// skip value nodes and null nodes
 		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
 			continue
 		}
 		node, nodeElements, err := resolveNode(it, sdb.stateCache.TrieDB())
 		if err != nil {
-			return nil, nil, nil, err
+			return nil, nil, err
 		}
 		switch node.NodeType {
-		case sd.Leaf:
+		case sdtypes.Leaf:
 			// created vs updated is important for leaf nodes since we need to diff their storage
 			// so we need to map all changed accounts at B to their leafkey, since account can change pathes but not leafkey
-			var account state.Account
+			var account types.StateAccount
 			if err := rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
-				return nil, nil, nil, fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", node.Path, err)
+				return nil, nil, fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", node.Path, err)
 			}
 			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
 			valueNodePath := append(node.Path, partialPath...)
@@ -360,33 +369,22 @@ func (sdb *builder) createdAndUpdatedState(iters iterPair, watchedAddresses []co
 					Account:   &account,
 				}
 			}
-		case sd.Extension, sd.Branch:
-			// create a diff for any intermediate node that has changed at b
-			// created vs updated makes no difference for intermediate nodes since we do not need to diff storage
-			if intermediates {
-				createdOrUpdatedIntermediateNodes = append(createdOrUpdatedIntermediateNodes, sd.StateNode{
-					NodeType:  node.NodeType,
-					Path:      node.Path,
-					NodeValue: node.NodeValue,
-				})
-			}
-		default:
-			return nil, nil, nil, fmt.Errorf("unexpected node type %s", node.NodeType)
 		}
 		// add both intermediate and leaf node paths to the list of diffPathsAtB
 		diffPathsAtB[common.Bytes2Hex(node.Path)] = true
 	}
-	return createdOrUpdatedIntermediateNodes, diffAcountsAtB, diffPathsAtB, it.Error()
+	return diffAcountsAtB, diffPathsAtB, it.Error()
 }

-// deletedOrUpdatedState returns a slice of all the paths that are emptied at B
-// and a mapping of their leafkeys to all the accounts that exist in a different state at A than B
-func (sdb *builder) deletedOrUpdatedState(iters iterPair, diffPathsAtB map[string]bool) ([]sd.StateNode, AccountMap, error) {
-	emptiedPaths := make([]sd.StateNode, 0)
-	diffAccountAtA := make(AccountMap)
-	it, _ := trie.NewDifferenceIterator(iters.newer, iters.older)
+// createdAndUpdatedStateWithIntermediateNodes returns
+// a slice of all the intermediate nodes that exist in a different state at B than A
+// a mapping of their leafkeys to all the accounts that exist in a different state at B than A
+// and a slice of the paths for all of the nodes included in both
+func (sdb *builder) createdAndUpdatedStateWithIntermediateNodes(iters iterPair, output sdtypes.StateNodeSink) (AccountMap, map[string]bool, error) {
+	diffPathsAtB := make(map[string]bool)
+	diffAcountsAtB := make(AccountMap)
+	it, _ := trie.NewDifferenceIterator(iters.older, iters.newer)
 	for it.Next(true) {
-		// skip value nodes and null nodes
 		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
 			continue
 		}
@@ -394,20 +392,11 @@ func (sdb *builder) deletedOrUpdatedState(iters iterPair, diffPathsAtB map[strin
 		if err != nil {
 			return nil, nil, err
 		}
-		// if this nodePath did not show up in diffPathsAtB
-		// that means the node at this path was deleted (or moved) in B
-		// emit an empty "removed" diff to signify as such
-		if _, ok := diffPathsAtB[common.Bytes2Hex(node.Path)]; !ok {
-			emptiedPaths = append(emptiedPaths, sd.StateNode{
-				Path:      node.Path,
-				NodeValue: []byte{},
-				NodeType:  sd.Removed,
-			})
-		}
 		switch node.NodeType {
-		case sd.Leaf:
-			// map all different accounts at A to their leafkey
-			var account state.Account
+		case sdtypes.Leaf:
+			// created vs updated is important for leaf nodes since we need to diff their storage
+			// so we need to map all changed accounts at B to their leafkey, since account can change paths but not leafkey
+			var account types.StateAccount
 			if err := rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
 				return nil, nil, fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", node.Path, err)
 			}
@@ -415,6 +404,56 @@ func (sdb *builder) deletedOrUpdatedState(iters iterPair, diffPathsAtB map[strin
 			valueNodePath := append(node.Path, partialPath...)
 			encodedPath := trie.HexToCompact(valueNodePath)
 			leafKey := encodedPath[1:]
+			diffAcountsAtB[common.Bytes2Hex(leafKey)] = accountWrapper{
+				NodeType:  node.NodeType,
+				Path:      node.Path,
+				NodeValue: node.NodeValue,
+				LeafKey:   leafKey,
+				Account:   &account,
+			}
+		case sdtypes.Extension, sdtypes.Branch:
+			// create a diff for any intermediate node that has changed at b
+			// created vs updated makes no difference for intermediate nodes since we do not need to diff storage
+			if err := output(sdtypes.StateNode{
+				NodeType:  node.NodeType,
+				Path:      node.Path,
+				NodeValue: node.NodeValue,
+			}); err != nil {
+				return nil, nil, err
+			}
+		default:
+			return nil, nil, fmt.Errorf("unexpected node type %s", node.NodeType)
+		}
+		// add both intermediate and leaf node paths to the list of diffPathsAtB
+		diffPathsAtB[common.Bytes2Hex(node.Path)] = true
+	}
+	return diffAcountsAtB, diffPathsAtB, it.Error()
+}
+
+// deletedOrUpdatedState returns a slice of all the paths that are emptied at B
+// and a mapping of their leafkeys to all the accounts that exist in a different state at A than B
+func (sdb *builder) deletedOrUpdatedState(iters iterPair, diffPathsAtB map[string]bool, output sdtypes.StateNodeSink) (AccountMap, error) {
+	diffAccountAtA := make(AccountMap)
+	it, _ := trie.NewDifferenceIterator(iters.newer, iters.older)
+	for it.Next(true) {
+		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
+			continue
+		}
+		node, nodeElements, err := resolveNode(it, sdb.stateCache.TrieDB())
+		if err != nil {
+			return nil, err
+		}
+		switch node.NodeType {
+		case sdtypes.Leaf:
+			// map all different accounts at A to their leafkey
+			var account types.StateAccount
+			if err := rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
+				return nil, fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", node.Path, err)
+			}
+			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
+			valueNodePath := append(node.Path, partialPath...)
+			encodedPath := trie.HexToCompact(valueNodePath)
+			leafKey := encodedPath[1:]
 			diffAccountAtA[common.Bytes2Hex(leafKey)] = accountWrapper{
 				NodeType:  node.NodeType,
 				Path:      node.Path,
@@ -422,55 +461,79 @@ func (sdb *builder) deletedOrUpdatedState(iters iterPair, diffPathsAtB map[strin
 				LeafKey:   leafKey,
 				Account:   &account,
 			}
-		case sd.Extension, sd.Branch:
+			// if this node's path did not show up in diffPathsAtB
+			// that means the node at this path was deleted (or moved) in B
+			// emit an empty "removed" diff to signify as such
+			if _, ok := diffPathsAtB[common.Bytes2Hex(node.Path)]; !ok {
+				if err := output(sdtypes.StateNode{
+					Path:      node.Path,
+					NodeValue: []byte{},
+					NodeType:  sdtypes.Removed,
+					LeafKey:   leafKey,
+				}); err != nil {
+					return nil, err
+				}
+			}
+		case sdtypes.Extension, sdtypes.Branch:
+			// if this node's path did not show up in diffPathsAtB
+			// that means the node at this path was deleted (or moved) in B
+			// emit an empty "removed" diff to signify as such
+			if _, ok := diffPathsAtB[common.Bytes2Hex(node.Path)]; !ok {
+				if err := output(sdtypes.StateNode{
+					Path:      node.Path,
+					NodeValue: []byte{},
+					NodeType:  sdtypes.Removed,
+				}); err != nil {
+					return nil, err
+				}
+			}
 			// fall through, we did everything we need to do with these node types
 		default:
-			return nil, nil, fmt.Errorf("unexpected node type %s", node.NodeType)
+			return nil, fmt.Errorf("unexpected node type %s", node.NodeType)
 		}
 	}
-	return emptiedPaths, diffAccountAtA, it.Error()
+	return diffAccountAtA, it.Error()
 }

 // buildAccountUpdates uses the account diffs maps for A => B and B => A and the known intersection of their leafkeys
 // to generate the statediff node objects for all of the accounts that existed at both A and B but in different states
 // needs to be called before building account creations and deletions as this mutates
 // those account maps to remove the accounts which were updated
-func (sdb *builder) buildAccountUpdates(creations, deletions AccountMap, updatedKeys []string, watchedStorageKeys []common.Hash, intermediateStorageNodes bool) ([]sd.StateNode, error) {
-	updatedAccounts := make([]sd.StateNode, 0, len(updatedKeys))
+func (sdb *builder) buildAccountUpdates(creations, deletions AccountMap, updatedKeys []string, watchedStorageKeys []common.Hash, intermediateStorageNodes bool, output sdtypes.StateNodeSink) error {
 	var err error
 	for _, key := range updatedKeys {
 		createdAcc := creations[key]
 		deletedAcc := deletions[key]
-		var storageDiffs []sd.StorageNode
+		var storageDiffs []sdtypes.StorageNode
 		if deletedAcc.Account != nil && createdAcc.Account != nil {
 			oldSR := deletedAcc.Account.Root
 			newSR := createdAcc.Account.Root
-			storageDiffs, err = sdb.buildStorageNodesIncremental(oldSR, newSR, watchedStorageKeys, intermediateStorageNodes)
+			err = sdb.buildStorageNodesIncremental(oldSR, newSR, watchedStorageKeys, intermediateStorageNodes, storageNodeAppender(&storageDiffs))
 			if err != nil {
-				return nil, fmt.Errorf("failed building incremental storage diffs for account with leafkey %s\r\nerror: %v", key, err)
+				return fmt.Errorf("failed building incremental storage diffs for account with leafkey %s\r\nerror: %v", key, err)
 			}
 		}
-		updatedAccounts = append(updatedAccounts, sd.StateNode{
+		if err = output(sdtypes.StateNode{
 			NodeType:     createdAcc.NodeType,
 			Path:         createdAcc.Path,
 			NodeValue:    createdAcc.NodeValue,
 			LeafKey:      createdAcc.LeafKey,
 			StorageNodes: storageDiffs,
-		})
+		}); err != nil {
+			return err
+		}
 		delete(creations, key)
 		delete(deletions, key)
 	}

-	return updatedAccounts, nil
+	return nil
 }

 // buildAccountCreations returns the statediff node objects for all the accounts that exist at B but not at A
 // it also returns the code and codehash for created contract accounts
-func (sdb *builder) buildAccountCreations(accounts AccountMap, watchedStorageKeys []common.Hash, intermediateStorageNodes bool) ([]sd.StateNode, []sd.CodeAndCodeHash, error) {
-	accountDiffs := make([]sd.StateNode, 0, len(accounts))
-	codeAndCodeHashes := make([]sd.CodeAndCodeHash, 0)
+func (sdb *builder) buildAccountCreations(accounts AccountMap, watchedStorageKeys []common.Hash, intermediateStorageNodes bool, output sdtypes.StateNodeSink, codeOutput sdtypes.CodeSink) error {
 	for _, val := range accounts {
-		diff := sd.StateNode{
+		diff := sdtypes.StateNode{
 			NodeType:  val.NodeType,
 			Path:      val.Path,
 			LeafKey:   val.LeafKey,
@@ -478,161 +541,128 @@ func (sdb *builder) buildAccountCreations(accounts AccountMap, watchedStorageKey
 		}
 		if !bytes.Equal(val.Account.CodeHash, nullCodeHash) {
 			// For contract creations, any storage node contained is a diff
-			storageDiffs, err := sdb.buildStorageNodesEventual(val.Account.Root, watchedStorageKeys, intermediateStorageNodes)
+			var storageDiffs []sdtypes.StorageNode
+			err := sdb.buildStorageNodesEventual(val.Account.Root, watchedStorageKeys, intermediateStorageNodes, storageNodeAppender(&storageDiffs))
 			if err != nil {
-				return nil, nil, fmt.Errorf("failed building eventual storage diffs for node %x\r\nerror: %v", val.Path, err)
+				return fmt.Errorf("failed building eventual storage diffs for node %x\r\nerror: %v", val.Path, err)
 			}
 			diff.StorageNodes = storageDiffs
-			// emit codehash => code mappings for new contracts
+			// emit codehash => code mappings for code
 			codeHash := common.BytesToHash(val.Account.CodeHash)
 			code, err := sdb.stateCache.ContractCode(common.Hash{}, codeHash)
 			if err != nil {
-				return nil, nil, fmt.Errorf("failed to retrieve code for codehash %s\r\n error: %v", codeHash.String(), err)
+				return fmt.Errorf("failed to retrieve code for codehash %s\r\n error: %v", codeHash.String(), err)
 			}
-			codeAndCodeHashes = append(codeAndCodeHashes, sd.CodeAndCodeHash{
+			if err := codeOutput(sdtypes.CodeAndCodeHash{
 				Hash: codeHash,
 				Code: code,
-			})
+			}); err != nil {
+				return err
+			}
+		}
+		if err := output(diff); err != nil {
+			return err
 		}
-		accountDiffs = append(accountDiffs, diff)
 	}

-	return accountDiffs, codeAndCodeHashes, nil
+	return nil
 }

 // buildStorageNodesEventual builds the storage diff node objects for a created account
 // i.e. it returns all the storage nodes at this state, since there is no previous state
-func (sdb *builder) buildStorageNodesEventual(sr common.Hash, watchedStorageKeys []common.Hash, intermediateNodes bool) ([]sd.StorageNode, error) {
+func (sdb *builder) buildStorageNodesEventual(sr common.Hash, watchedStorageKeys []common.Hash, intermediateNodes bool, output sdtypes.StorageNodeSink) error {
 	if bytes.Equal(sr.Bytes(), emptyContractRoot.Bytes()) {
-		return nil, nil
+		return nil
 	}
-	log.Debug("Storage Root For Eventual Diff", "root", sr, sr.Hex())
+	log.Debug("Storage Root For Eventual Diff", "root", sr.Hex())
 	sTrie, err := sdb.stateCache.OpenTrie(sr)
 	if err != nil {
 		log.Info("error in build storage diff eventual", "error", err)
-		return nil, err
+		return err
 	}
 	it := sTrie.NodeIterator(make([]byte, 0))
-	return sdb.buildStorageNodesFromTrie(it, watchedStorageKeys, intermediateNodes)
+	err = sdb.buildStorageNodesFromTrie(it, watchedStorageKeys, intermediateNodes, output)
+	if err != nil {
+		return err
+	}
+	return nil
 }

 // buildStorageNodesFromTrie returns all the storage diff node objects in the provided node iterator
 // if any storage keys are provided it will only return those leaf nodes
 // including intermediate nodes can be turned on or off
-func (sdb *builder) buildStorageNodesFromTrie(it trie.NodeIterator, watchedStorageKeys []common.Hash, intermediateNodes bool) ([]sd.StorageNode, error) {
-	storageDiffs := make([]sd.StorageNode, 0)
+func (sdb *builder) buildStorageNodesFromTrie(it trie.NodeIterator, watchedStorageKeys []common.Hash, intermediateNodes bool, output sdtypes.StorageNodeSink) error {
 	for it.Next(true) {
-		// skip value nodes and null nodes
 		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
 			continue
 		}
 		node, nodeElements, err := resolveNode(it, sdb.stateCache.TrieDB())
 		if err != nil {
-			return nil, err
+			return err
 		}
 		switch node.NodeType {
-		case sd.Leaf:
+		case sdtypes.Leaf:
 			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
 			valueNodePath := append(node.Path, partialPath...)
 			encodedPath := trie.HexToCompact(valueNodePath)
 			leafKey := encodedPath[1:]
 			if isWatchedStorageKey(watchedStorageKeys, leafKey) {
-				storageDiffs = append(storageDiffs, sd.StorageNode{
+				if err := output(sdtypes.StorageNode{
 					NodeType:  node.NodeType,
 					Path:      node.Path,
 					NodeValue: node.NodeValue,
 					LeafKey:   leafKey,
-				})
+				}); err != nil {
+					return err
+				}
 			}
-		case sd.Extension, sd.Branch:
+		case sdtypes.Extension, sdtypes.Branch:
 			if intermediateNodes {
-				storageDiffs = append(storageDiffs, sd.StorageNode{
+				if err := output(sdtypes.StorageNode{
 					NodeType:  node.NodeType,
 					Path:      node.Path,
 					NodeValue: node.NodeValue,
-				})
+				}); err != nil {
+					return err
+				}
 			}
 		default:
-			return nil, fmt.Errorf("unexpected node type %s", node.NodeType)
+			return fmt.Errorf("unexpected node type %s", node.NodeType)
 		}
 	}
-	return storageDiffs, it.Error()
+	return it.Error()
 }

 // buildStorageNodesIncremental builds the storage diff node objects for all nodes that exist in a different state at B than A
-func (sdb *builder) buildStorageNodesIncremental(oldSR common.Hash, newSR common.Hash, watchedStorageKeys []common.Hash, intermediateNodes bool) ([]sd.StorageNode, error) {
+func (sdb *builder) buildStorageNodesIncremental(oldSR common.Hash, newSR common.Hash, watchedStorageKeys []common.Hash, intermediateNodes bool, output sdtypes.StorageNodeSink) error {
 	if bytes.Equal(newSR.Bytes(), oldSR.Bytes()) {
-		return nil, nil
+		return nil
 	}
 	log.Debug("Storage Roots for Incremental Diff", "old", oldSR.Hex(), "new", newSR.Hex())
 	oldTrie, err := sdb.stateCache.OpenTrie(oldSR)
 	if err != nil {
-		return nil, err
+		return err
 	}
 	newTrie, err := sdb.stateCache.OpenTrie(newSR)
 	if err != nil {
-		return nil, err
+		return err
 	}

-	createdOrUpdatedStorage, diffPathsAtB, err := sdb.createdAndUpdatedStorage(oldTrie.NodeIterator([]byte{}), newTrie.NodeIterator([]byte{}), watchedStorageKeys, intermediateNodes)
+	diffPathsAtB, err := sdb.createdAndUpdatedStorage(oldTrie.NodeIterator([]byte{}), newTrie.NodeIterator([]byte{}), watchedStorageKeys, intermediateNodes, output)
 	if err != nil {
-		return nil, err
+		return err
 	}
-	deletedStorage, err := sdb.deletedOrUpdatedStorage(oldTrie.NodeIterator([]byte{}), newTrie.NodeIterator([]byte{}), diffPathsAtB, watchedStorageKeys, intermediateNodes)
+	err = sdb.deletedOrUpdatedStorage(oldTrie.NodeIterator([]byte{}), newTrie.NodeIterator([]byte{}), diffPathsAtB, watchedStorageKeys, intermediateNodes, output)
 	if err != nil {
-		return nil, err
+		return err
 	}
-	return append(createdOrUpdatedStorage, deletedStorage...), nil
+	return nil
 }

-func (sdb *builder) createdAndUpdatedStorage(a, b trie.NodeIterator, watchedKeys []common.Hash, intermediateNodes bool) ([]sd.StorageNode, map[string]bool, error) {
-	createdOrUpdatedStorage := make([]sd.StorageNode, 0)
+func (sdb *builder) createdAndUpdatedStorage(a, b trie.NodeIterator, watchedKeys []common.Hash, intermediateNodes bool, output sdtypes.StorageNodeSink) (map[string]bool, error) {
 	diffPathsAtB := make(map[string]bool)
 	it, _ := trie.NewDifferenceIterator(a, b)
 	for it.Next(true) {
-		// skip value nodes and null nodes
-		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
-			continue
-		}
-		node, nodeElements, err := resolveNode(it, sdb.stateCache.TrieDB())
-		if err != nil {
-			return nil, nil, err
-		}
-		switch node.NodeType {
-		case sd.Leaf:
-			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
-			valueNodePath := append(node.Path, partialPath...)
-			encodedPath := trie.HexToCompact(valueNodePath)
-			leafKey := encodedPath[1:]
-			if isWatchedStorageKey(watchedKeys, leafKey) {
-				createdOrUpdatedStorage = append(createdOrUpdatedStorage, sd.StorageNode{
-					NodeType:  node.NodeType,
-					Path:      node.Path,
-					NodeValue: node.NodeValue,
-					LeafKey:   leafKey,
-				})
-			}
-		case sd.Extension, sd.Branch:
-			if intermediateNodes {
-				createdOrUpdatedStorage = append(createdOrUpdatedStorage, sd.StorageNode{
-					NodeType:  node.NodeType,
-					Path:      node.Path,
-					NodeValue: node.NodeValue,
-				})
-			}
-		default:
-			return nil, nil, fmt.Errorf("unexpected node type %s", node.NodeType)
-		}
-		diffPathsAtB[common.Bytes2Hex(node.Path)] = true
-	}
-	return createdOrUpdatedStorage, diffPathsAtB, it.Error()
-}
-
-func (sdb *builder) deletedOrUpdatedStorage(a, b trie.NodeIterator, diffPathsAtB map[string]bool, watchedKeys []common.Hash, intermediateNodes bool) ([]sd.StorageNode, error) {
-	deletedStorage := make([]sd.StorageNode, 0)
-	it, _ := trie.NewDifferenceIterator(b, a)
-	for it.Next(true) {
-		// skip value nodes and null nodes
 		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
 			continue
 		}
@@ -640,6 +670,50 @@ func (sdb *builder) deletedOrUpdatedStorage(a, b trie.NodeIterator, diffPathsAtB
 		if err != nil {
 			return nil, err
 		}
+		switch node.NodeType {
+		case sdtypes.Leaf:
+			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
+			valueNodePath := append(node.Path, partialPath...)
+			encodedPath := trie.HexToCompact(valueNodePath)
+			leafKey := encodedPath[1:]
+			if isWatchedStorageKey(watchedKeys, leafKey) {
+				if err := output(sdtypes.StorageNode{
+					NodeType:  node.NodeType,
+					Path:      node.Path,
+					NodeValue: node.NodeValue,
+					LeafKey:   leafKey,
+				}); err != nil {
+					return nil, err
+				}
+			}
+		case sdtypes.Extension, sdtypes.Branch:
+			if intermediateNodes {
+				if err := output(sdtypes.StorageNode{
+					NodeType:  node.NodeType,
+					Path:      node.Path,
+					NodeValue: node.NodeValue,
+				}); err != nil {
+					return nil, err
+				}
+			}
+		default:
+			return nil, fmt.Errorf("unexpected node type %s", node.NodeType)
+		}
+		diffPathsAtB[common.Bytes2Hex(node.Path)] = true
+	}
+	return diffPathsAtB, it.Error()
+}
+
+func (sdb *builder) deletedOrUpdatedStorage(a, b trie.NodeIterator, diffPathsAtB map[string]bool, watchedKeys []common.Hash, intermediateNodes bool, output sdtypes.StorageNodeSink) error {
+	it, _ := trie.NewDifferenceIterator(b, a)
+	for it.Next(true) {
+		if it.Leaf() || bytes.Equal(nullHashBytes, it.Hash().Bytes()) {
+			continue
+		}
+		node, nodeElements, err := resolveNode(it, sdb.stateCache.TrieDB())
+		if err != nil {
+			return err
+		}
 		// if this node path showed up in diffPathsAtB
 		// that means this node was updated at B and we already have the updated diff for it
 		// otherwise that means this node was deleted in B and we need to add a "removed" diff to represent that event
@@ -647,31 +721,36 @@ func (sdb *builder) deletedOrUpdatedStorage(a, b trie.NodeIterator, diffPathsAtB
 			continue
 		}
 		switch node.NodeType {
-		case sd.Leaf:
+		case sdtypes.Leaf:
 			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
 			valueNodePath := append(node.Path, partialPath...)
 			encodedPath := trie.HexToCompact(valueNodePath)
 			leafKey := encodedPath[1:]
 			if isWatchedStorageKey(watchedKeys, leafKey) {
-				deletedStorage = append(deletedStorage, sd.StorageNode{
-					NodeType:  sd.Removed,
+				if err := output(sdtypes.StorageNode{
+					NodeType:  sdtypes.Removed,
 					Path:      node.Path,
 					NodeValue: []byte{},
-				})
+					LeafKey:   leafKey,
+				}); err != nil {
+					return err
+				}
 			}
-		case sd.Extension, sd.Branch:
+		case sdtypes.Extension, sdtypes.Branch:
 			if intermediateNodes {
-				deletedStorage = append(deletedStorage, sd.StorageNode{
-					NodeType:  sd.Removed,
+				if err := output(sdtypes.StorageNode{
+					NodeType:  sdtypes.Removed,
 					Path:      node.Path,
 					NodeValue: []byte{},
-				})
+				}); err != nil {
+					return err
+				}
 			}
 		default:
-			return nil, fmt.Errorf("unexpected node type %s", node.NodeType)
+			return fmt.Errorf("unexpected node type %s", node.NodeType)
 		}
 	}
-	return deletedStorage, it.Error()
+	return it.Error()
 }

 // isWatchedAddress is used to check if a state account corresponds to one of the addresses the builder is configured to watch
@@ -25,6 +25,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/trie"
 )

 // LvlDBReader exposes the necessary read functions on lvldb
@@ -34,16 +35,24 @@ type LvlDBReader struct {
 	chainConfig *params.ChainConfig
 }

+// ReaderConfig struct for initializing a LvlDBReader
+type ReaderConfig struct {
+	TrieConfig        *trie.Config
+	ChainConfig       *params.ChainConfig
+	Path, AncientPath string
+	DBCacheSize       int
+}
+
 // NewLvlDBReader creates a new LvlDBReader
-func NewLvlDBReader(path, ancient string, chainConfig *params.ChainConfig) (*LvlDBReader, error) {
-	edb, err := rawdb.NewLevelDBDatabaseWithFreezer(path, 1024, 256, ancient, "eth-statediff-service")
+func NewLvlDBReader(conf ReaderConfig) (*LvlDBReader, error) {
+	edb, err := rawdb.NewLevelDBDatabaseWithFreezer(conf.Path, conf.DBCacheSize, 256, conf.AncientPath, "eth-statediff-service", true)
 	if err != nil {
 		return nil, err
 	}
 	return &LvlDBReader{
 		ethDB:       edb,
-		stateDB:     state.NewDatabase(edb),
-		chainConfig: chainConfig,
+		stateDB:     state.NewDatabaseWithConfig(edb, conf.TrieConfig),
+		chainConfig: conf.ChainConfig,
 	}, nil
 }

@@ -29,7 +29,10 @@ import (
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/rpc"
 	sd "github.com/ethereum/go-ethereum/statediff"
+	sdtypes "github.com/ethereum/go-ethereum/statediff/types"
 	"github.com/sirupsen/logrus"
+
+	ind "github.com/ethereum/go-ethereum/statediff/indexer"
 )

 // lvlDBReader are the db interfaces required by the statediffing service
@@ -43,20 +46,23 @@ type lvlDBReader interface {

 // IService is the state-diffing service interface
 type IService interface {
-	// APIs(), Protocols(), Start() and Stop()
-	node.Service
+	// Start() and Stop()
+	node.Lifecycle
+	// For node service registration
+	APIs() []rpc.API
+	Protocols() []p2p.Protocol
 	// Main event loop for processing state diffs
 	Loop(wg *sync.WaitGroup)
 	// Method to get state diff object at specific block
 	StateDiffAt(blockNumber uint64, params sd.Params) (*sd.Payload, error)
+	// Method to get state diff object at specific block
+	StateDiffFor(blockHash common.Hash, params sd.Params) (*sd.Payload, error)
 	// Method to get state trie object at specific block
 	StateTrieAt(blockNumber uint64, params sd.Params) (*sd.Payload, error)
-}
-
-// Server configuration
-type Config struct {
-	// Number of goroutines to use
-	Workers uint
+	// Method to write state diff object directly to DB
+	WriteStateDiffAt(blockNumber uint64, params sd.Params) error
+	// Method to get state trie object at specific block
+	WriteStateDiffFor(blockHash common.Hash, params sd.Params) error
 }

 // Service is the underlying struct for the state diffing service
@@ -67,11 +73,13 @@ type Service struct {
 	lvlDBReader lvlDBReader
 	// Used to signal shutdown of the service
 	QuitChan chan bool
+	// Interface for publishing statediffs as PG-IPLD objects
+	indexer ind.Indexer
 }

 // NewStateDiffService creates a new Service
-func NewStateDiffService(lvlDBReader lvlDBReader, cfg Config) (*Service, error) {
-	builder, err := NewBuilder(lvlDBReader.StateDB(), cfg.Workers)
+func NewStateDiffService(lvlDBReader lvlDBReader, indexer ind.Indexer, workers uint) (*Service, error) {
+	builder, err := NewBuilder(lvlDBReader.StateDB(), workers)
 	if err != nil {
 		return nil, err
 	}
@@ -79,6 +87,7 @@ func NewStateDiffService(lvlDBReader lvlDBReader, cfg Config) (*Service, error)
 		lvlDBReader: lvlDBReader,
 		Builder:     builder,
 		QuitChan:    make(chan bool),
+		indexer:     indexer,
 	}, nil
 }

@@ -130,6 +139,24 @@ func (sds *Service) StateDiffAt(blockNumber uint64, params sd.Params) (*sd.Paylo
 	return sds.processStateDiff(currentBlock, parentBlock.Root(), params)
 }

+// StateDiffFor returns a state diff object payload for the specific blockhash
+// This operation cannot be performed back past the point of db pruning; it requires an archival node for historical data
+func (sds *Service) StateDiffFor(blockHash common.Hash, params sd.Params) (*sd.Payload, error) {
+	currentBlock, err := sds.lvlDBReader.GetBlockByHash(blockHash)
+	if err != nil {
+		return nil, err
+	}
+	logrus.Info(fmt.Sprintf("sending state diff at block %s", blockHash.Hex()))
+	if currentBlock.NumberU64() == 0 {
+		return sds.processStateDiff(currentBlock, common.Hash{}, params)
+	}
+	parentBlock, err := sds.lvlDBReader.GetBlockByHash(currentBlock.ParentHash())
+	if err != nil {
+		return nil, err
+	}
+	return sds.processStateDiff(currentBlock, parentBlock.Root(), params)
+}
+
 // processStateDiff method builds the state diff payload from the current block, parent state root, and provided params
 func (sds *Service) processStateDiff(currentBlock *types.Block, parentRoot common.Hash, params sd.Params) (*sd.Payload, error) {
 	stateDiff, err := sds.Builder.BuildStateDiffObject(sd.Args{
@@ -206,7 +233,7 @@ func (sds *Service) processStateTrie(block *types.Block, params sd.Params) (*sd.
 }

 // Start is used to begin the service
-func (sds *Service) Start(*p2p.Server) error {
+func (sds *Service) Start() error {
 	logrus.Info("starting statediff service")
 	go sds.Loop(new(sync.WaitGroup))
 	return nil
@@ -218,3 +245,79 @@ func (sds *Service) Stop() error {
 	close(sds.QuitChan)
 	return nil
 }
+
+// WriteStateDiffAt writes a state diff at the specific blockheight directly to the database
+// This operation cannot be performed back past the point of db pruning; it requires an archival node
+// for historical data
+func (sds *Service) WriteStateDiffAt(blockNumber uint64, params sd.Params) error {
+	logrus.Info(fmt.Sprintf("Writing state diff at block %d", blockNumber))
+	currentBlock, err := sds.lvlDBReader.GetBlockByNumber(blockNumber)
+	if err != nil {
+		return err
+	}
+	parentRoot := common.Hash{}
+	if blockNumber != 0 {
+		parentBlock, err := sds.lvlDBReader.GetBlockByHash(currentBlock.ParentHash())
+		if err != nil {
+			return err
+		}
+		parentRoot = parentBlock.Root()
+	}
+	return sds.writeStateDiff(currentBlock, parentRoot, params)
+}
+
+// WriteStateDiffFor writes a state diff for the specific blockHash directly to the database
+// This operation cannot be performed back past the point of db pruning; it requires an archival node
+// for historical data
+func (sds *Service) WriteStateDiffFor(blockHash common.Hash, params sd.Params) error {
+	logrus.Info(fmt.Sprintf("Writing state diff for block %s", blockHash.Hex()))
+	currentBlock, err := sds.lvlDBReader.GetBlockByHash(blockHash)
+	if err != nil {
+		return err
+	}
+	parentRoot := common.Hash{}
+	if currentBlock.NumberU64() != 0 {
+		parentBlock, err := sds.lvlDBReader.GetBlockByHash(currentBlock.ParentHash())
+		if err != nil {
+			return err
+		}
+		parentRoot = parentBlock.Root()
+	}
+	return sds.writeStateDiff(currentBlock, parentRoot, params)
+}
+
+// Writes a state diff from the current block, parent state root, and provided params
+func (sds *Service) writeStateDiff(block *types.Block, parentRoot common.Hash, params sd.Params) error {
+	var totalDifficulty *big.Int
+	var receipts types.Receipts
+	var err error
+	if params.IncludeTD {
+		totalDifficulty, err = sds.lvlDBReader.GetTdByHash(block.Hash())
+	}
+	if err != nil {
+		return err
+	}
+	if params.IncludeReceipts {
+		receipts, err = sds.lvlDBReader.GetReceiptsByHash(block.Hash())
+	}
+	if err != nil {
+		return err
+	}
+
+	tx, err := sds.indexer.PushBlock(block, receipts, totalDifficulty)
+	if err != nil {
+		return err
+	}
+	// defer handling of commit/rollback for any return case
+	output := func(node sdtypes.StateNode) error {
+		return sds.indexer.PushStateNode(tx, node)
+	}
+	codeOutput := func(c sdtypes.CodeAndCodeHash) error {
+		return sds.indexer.PushCodeAndCodeHash(tx, c)
+	}
+	err = sds.Builder.WriteStateDiffObject(sd.StateRoots{
+		NewStateRoot: block.Root(),
+		OldStateRoot: parentRoot,
+	}, params, output, codeOutput)
+	return tx.Close(err)
+}
@@ -32,8 +32,9 @@ import (
 // the returned hash chain is ordered head->parent.
 func MakeChain(n int, parent *types.Block, chainGen func(int, *core.BlockGen)) ([]*types.Block, *core.BlockChain) {
 	config := params.TestChainConfig
+	config.LondonBlock.Set(big.NewInt(10))
 	blocks, _ := core.GenerateChain(config, parent, ethash.NewFaker(), Testdb, n, chainGen)
-	chain, _ := core.NewBlockChain(Testdb, nil, params.TestChainConfig, ethash.NewFaker(), vm.Config{}, nil)
+	chain, _ := core.NewBlockChain(Testdb, nil, params.TestChainConfig, ethash.NewFaker(), vm.Config{}, nil, nil)
 	return blocks, chain
 }

@@ -1,128 +0,0 @@
-// Copyright 2019 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package mocks
-
-import (
-	"errors"
-	"math/big"
-	"time"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/core"
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/event"
-)
-
-// BlockChain is a mock blockchain for testing
-type BlockChain struct {
-	HashesLookedUp         []common.Hash
-	blocksToReturnByHash   map[common.Hash]*types.Block
-	blocksToReturnByNumber map[uint64]*types.Block
-	callCount              int
-	ChainEvents            []core.ChainEvent
-	Receipts               map[common.Hash]types.Receipts
-	TDByHash               map[common.Hash]*big.Int
-}
-
-// SetBlocksForHashes mock method
-func (blockChain *BlockChain) SetBlocksForHashes(blocks map[common.Hash]*types.Block) {
-	if blockChain.blocksToReturnByHash == nil {
-		blockChain.blocksToReturnByHash = make(map[common.Hash]*types.Block)
-	}
-	blockChain.blocksToReturnByHash = blocks
-}
-
-// GetBlockByHash mock method
-func (blockChain *BlockChain) GetBlockByHash(hash common.Hash) *types.Block {
-	blockChain.HashesLookedUp = append(blockChain.HashesLookedUp, hash)
-
-	var block *types.Block
-	if len(blockChain.blocksToReturnByHash) > 0 {
-		block = blockChain.blocksToReturnByHash[hash]
-	}
-
-	return block
-}
-
-// SetChainEvents mock method
-func (blockChain *BlockChain) SetChainEvents(chainEvents []core.ChainEvent) {
-	blockChain.ChainEvents = chainEvents
-}
-
-// SubscribeChainEvent mock method
-func (blockChain *BlockChain) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
-	subErr := errors.New("subscription error")
-
-	var eventCounter int
-	subscription := event.NewSubscription(func(quit <-chan struct{}) error {
-		for _, chainEvent := range blockChain.ChainEvents {
-			if eventCounter > 1 {
-				time.Sleep(250 * time.Millisecond)
-				return subErr
-			}
-			select {
-			case ch <- chainEvent:
-			case <-quit:
-				return nil
-			}
-			eventCounter++
-		}
-		return nil
-	})
-
-	return subscription
-}
-
-// SetReceiptsForHash test method
-func (blockChain *BlockChain) SetReceiptsForHash(hash common.Hash, receipts types.Receipts) {
-	if blockChain.Receipts == nil {
-		blockChain.Receipts = make(map[common.Hash]types.Receipts)
-	}
-	blockChain.Receipts[hash] = receipts
-}
-
-// GetReceiptsByHash mock method
-func (blockChain *BlockChain) GetReceiptsByHash(hash common.Hash) types.Receipts {
-	return blockChain.Receipts[hash]
-}
-
-// SetBlockForNumber test method
-func (blockChain *BlockChain) SetBlockForNumber(block *types.Block, number uint64) {
-	if blockChain.blocksToReturnByNumber == nil {
-		blockChain.blocksToReturnByNumber = make(map[uint64]*types.Block)
-	}
-	blockChain.blocksToReturnByNumber[number] = block
-}
-
-// GetBlockByNumber mock method
-func (blockChain *BlockChain) GetBlockByNumber(number uint64) *types.Block {
-	return blockChain.blocksToReturnByNumber[number]
-}
-
-// GetTdByHash mock method
-func (blockChain *BlockChain) GetTdByHash(hash common.Hash) *big.Int {
-	return blockChain.TDByHash[hash]
-}
-
-func (blockChain *BlockChain) SetTdByHash(hash common.Hash, td *big.Int) {
-	if blockChain.TDByHash == nil {
-		blockChain.TDByHash = make(map[common.Hash]*big.Int)
-	}
-	blockChain.TDByHash[hash] = td
-}
-
-func (blockChain *BlockChain) UnlockTrie(root common.Hash) {}
@@ -1,57 +0,0 @@
-// Copyright 2019 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package mocks
-
-import (
-	"github.com/ethereum/go-ethereum/core/types"
-	statediff "github.com/vulcanize/eth-statediff-service/pkg"
-)
-
-// Builder is a mock state diff builder
-type Builder struct {
-	Args         statediff.Args
-	Params       statediff.Params
-	stateDiff    statediff.StateObject
-	block        *types.Block
-	stateTrie    statediff.StateObject
-	builderError error
-}
-
-// BuildStateDiffObject mock method
-func (builder *Builder) BuildStateDiffObject(args statediff.Args, params statediff.Params) (statediff.StateObject, error) {
-	builder.Args = args
-	builder.Params = params
-
-	return builder.stateDiff, builder.builderError
-}
-
-// BuildStateTrieObject mock method
-func (builder *Builder) BuildStateTrieObject(block *types.Block) (statediff.StateObject, error) {
-	builder.block = block
-
-	return builder.stateTrie, builder.builderError
-}
-
-// SetStateDiffToBuild mock method
-func (builder *Builder) SetStateDiffToBuild(stateDiff statediff.StateObject) {
-	builder.stateDiff = stateDiff
-}
-
-// SetBuilderError mock method
-func (builder *Builder) SetBuilderError(err error) {
-	builder.builderError = err
-}
@@ -18,7 +18,6 @@ package testhelpers

 import (
 	"math/big"
-	"math/rand"

 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
@@ -42,12 +41,7 @@ func AddressToEncodedPath(address common.Address) []byte {
 // Test variables
 var (
 	EvenLeafFlag = []byte{byte(2) << 4}
-	BlockNumber  = big.NewInt(rand.Int63())
-	BlockHash    = "0xfa40fbe2d98d98b3363a778d52f2bcd29d6790b9b3f3cab2b167fd12d3550f73"
 	NullCodeHash = crypto.Keccak256Hash([]byte{})
-	StoragePath  = common.HexToHash("0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470").Bytes()
-	StorageKey   = common.HexToHash("0000000000000000000000000000000000000000000000000000000000000001").Bytes()
-	StorageValue = common.Hex2Bytes("0x03")
 	NullHash     = common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000")

 	Testdb          = rawdb.NewMemoryDatabase()
@@ -20,8 +20,8 @@
 package statediff

 import (
-	"github.com/ethereum/go-ethereum/core/state"
-	sd "github.com/ethereum/go-ethereum/statediff"
+	"github.com/ethereum/go-ethereum/core/types"
+	sd "github.com/ethereum/go-ethereum/statediff/types"
 )

 // AccountMap is a mapping of hex encoded path => account wrapper
@@ -29,7 +29,7 @@ type AccountMap map[string]accountWrapper

 // accountWrapper is used to temporary associate the unpacked node with its raw values
 type accountWrapper struct {
-	Account   *state.Account
+	Account   *types.StateAccount
 	NodeType  sd.NodeType
 	Path      []byte
 	NodeValue []byte
Author	SHA1	Message	Date
Ian Norden	26a88f06e7	Merge pull request #33 from vulcanize/update fix CLI bug	2021-10-20 16:28:39 -05:00
i-norden	0dcec4ec8e	fix CLI bug	2021-10-20 16:25:52 -05:00
Ian Norden	4cbaa630c7	Merge pull request #30 from vulcanize/updates Updates	2021-10-19 17:25:50 -05:00
i-norden	fb37ee9881	cli and toml bindings; fix unit tests; remove unused code	2021-10-19 16:49:04 -05:00
i-norden	01d0c21fd5	make cache configurable	2021-10-19 16:19:44 -05:00
Arijit Das	64e80eeb6a	Merge pull request #28 from vulcanize/range-endpoint Add RPC endpoint to write statediff.	2021-10-19 20:03:59 +05:30
Arijit Das	05b90107ca	Add RPC endpoint to write statediff.	2021-10-19 17:27:51 +05:30
Arijit Das	c4b95cc1b7	Merge pull request #27 from vulcanize/upgrade-geth Upgrade geth to v1.10.10.	2021-10-19 11:44:40 +05:30
Arijit Das	7b9ca9b519	Update go.mod	2021-10-19 11:41:23 +05:30
Arijit Das	b09e58c22a	Upgrade geth to v1.10.9.	2021-10-14 12:17:38 +05:30
Ian Norden	450ff197a2	Merge pull request #20 from vulcanize/update update to use v1.10.1-statediff-0.0.16	2021-03-24 18:54:46 -05:00
Ian Norden	41e2ae176f	update to use v1.10.1-statediff-0.0.16; including fix for missing leaf keys in 'removed node' entries	2021-03-24 17:46:20 -05:00
Ian Norden	fa0be51041	Merge pull request #19 from vulcanize/updates Replicate latest statediffing geth updates here	2021-03-01 09:47:18 -06:00
Ian Norden	0315a31dd2	add endpoints for fetching/writing statediff by blockhash	2021-02-27 12:39:16 -06:00
Ian Norden	017daffb5a	update to v1.9.25-statediff-v0.0.15	2021-02-27 12:39:03 -06:00
Roy Crihfield	d3bed86fff	Write directly to postgres (#16 ) * Write directly to PostgreSQL (port from geth statediff) * Refactors for Node API change * add namespacing to avoid name conflicts	2020-12-03 11:04:14 +08:00
roysc	d61113ad12	doc headers	2020-12-03 10:08:20 +08:00
roysc	7a6b866163	docs, tweaks, fixes	2020-11-26 18:57:54 +08:00
roysc	bd5d2992fa	fix import add namespacing to avoid name conflicts	2020-11-17 09:37:36 +08:00
roysc	d886579f3d	go.sum	2020-11-16 18:16:01 +08:00
roysc	a93eb3ce35	fix http server	2020-11-16 18:15:53 +08:00
roysc	abff9bf045	refactors geth Node api change sd ctor refactor	2020-11-16 17:49:59 +08:00
roysc	ca8b3066d1	Write directly to PostgreSQL (port from geth statediff)	2020-11-15 15:18:34 +08:00
Ian Norden	294568da4e	Merge pull request #14 from vulcanize/github_actions GitHub actions	2020-11-09 12:53:37 -06:00
Ian Norden	a5eea3f428	fix Dockerfile	2020-11-09 12:49:33 -06:00
Ian Norden	05328a1763	Makefile	2020-11-09 12:19:31 -06:00
Ian Norden	4901b3d35b	github actions integration	2020-11-09 12:15:50 -06:00
Ian Norden	f0a631109e	env variables for server paths	2020-11-09 12:15:50 -06:00