diff --git a/.circleci/config.yml b/.circleci/config.yml
index 39242f496cf4..856a79507bea 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -15,6 +15,6 @@ jobs:
     steps:
       - checkout # check out source code to working directory
       - run:
-          command: make bor
+          command: make all
       - run:
           command: make test
diff --git a/.github/workflows/dockerimage.yml b/.github/workflows/dockerimage.yml
new file mode 100644
index 000000000000..a357399dfbb8
--- /dev/null
+++ b/.github/workflows/dockerimage.yml
@@ -0,0 +1,25 @@
+name: Bor Docker Image CI
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+  
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build the Bor Docker image
+      env:
+        DOCKERHUB: ${{ secrets.DOCKERHUB }}
+        DOCKERHUB_KEY: ${{ secrets.DOCKERHUB_KEY }}
+      run: |
+        ls -l
+        echo "Docker login"
+        docker login -u $DOCKERHUB -p $DOCKERHUB_KEY
+        echo "running build"
+        docker build -t maticnetwork/bor:${GITHUB_REF/refs\/tags\//} .
+        echo "pushing image"
+        docker push maticnetwork/bor:${GITHUB_REF/refs\/tags\//}
+        echo "DONE!"
diff --git a/.github/workflows/linuxpackage.yml b/.github/workflows/linuxpackage.yml
new file mode 100644
index 000000000000..bdcb925e2f49
--- /dev/null
+++ b/.github/workflows/linuxpackage.yml
@@ -0,0 +1,76 @@
+name: Linux package
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.13
+
+      - name: Set up Ruby 2.6
+        uses: actions/setup-ruby@v1
+        with:
+          ruby-version: 2.6
+  
+      - name: Build package
+        run: |
+          set -x
+
+          sudo apt-get -yqq install libpq-dev build-essential
+          gem install --no-document fpm
+          fpm --version
+          
+          make bor
+
+          cat > bor.service <<- "EOF"
+          [Unit]
+          Description=bor
+          [Service]
+          WorkingDirectory=/etc/bor/
+          EnvironmentFile=/etc/bor/metadata
+          ExecStartPre=/bin/mkdir -p /var/log/matic-logs/
+          ExecStart=/bin/bash -c "/usr/bin/bor --datadir /etc/bor/dataDir --port '30303' --rpc --rpcaddr '0.0.0.0' --rpcvhosts '*' --rpccorsdomain '*' --rpcport '8545' --ipcpath /etc/bor/geth.ipc --rpcapi 'bor,db,eth,net,web3,txpool' --networkid ${NETWORK_ID} --gasprice '0' --keystore /etc/bor/dataDir/keystore --unlock ${VALIDATOR_ADDRESS} --password /etc/bor/dataDir/password.txt --allow-insecure-unlock --maxpeers 150 --mine > /var/log/matic-logs/bor.log 2>&1"
+          Type=simple
+          User=root
+          EOF
+
+          cat > after_install.sh <<- "EOF"
+          #!/bin/bash
+          touch /etc/bor/metadata
+          EOF
+
+          cat > metadata <<- "EOF"
+          NETWORK_ID=
+          VALIDATOR_ADDRESS=
+          EOF
+
+          fpm -s dir -t deb --deb-user root --deb-group root -n matic-bor -v ${GITHUB_REF/refs\/tags\//} \
+            --after-install after_install.sh \
+            bor.service=/etc/systemd/system/ \
+            build/bin/bor=/usr/bin/ \
+            metadata=/etc/bor/
+          
+          mkdir packages-${GITHUB_REF/refs\/tags\//}
+
+          mv matic-bor_${GITHUB_REF/refs\/tags\//}_amd64.deb packages-${GITHUB_REF/refs\/tags\//}/
+
+          ls packages-${GITHUB_REF/refs\/tags\//}/
+
+      - uses: jakejarvis/s3-sync-action@master
+        with:
+          args: --acl public-read
+        env:
+          AWS_S3_BUCKET: ${{ secrets.AWS_S3_BUCKET }}
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          AWS_REGION: 'us-east-1'   # optional: defaults to us-east-1
+          SOURCE_DIR: 'packages-${GITHUB_REF/refs\/tags\//}'
+          DEST_DIR: '${GITHUB_REF/refs\/tags\//}'
diff --git a/Dockerfile b/Dockerfile
index 0c0c7329501f..8af6ff3d5a07 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,15 @@
-# Build Geth in a stock Go builder container
+# Build Bor in a stock Go builder container
 FROM golang:1.12-alpine as builder
 
 RUN apk add --no-cache make gcc musl-dev linux-headers git
 
-ADD . /go-ethereum
-RUN cd /go-ethereum && make geth
+ADD . /bor
+RUN cd /bor && make bor
 
-# Pull Geth into a second stage deploy alpine container
+# Pull Bor into a second stage deploy alpine container
 FROM alpine:latest
 
 RUN apk add --no-cache ca-certificates
-COPY --from=builder /go-ethereum/build/bin/geth /usr/local/bin/
+COPY --from=builder /bor/build/bin/bor /usr/local/bin/
 
 EXPOSE 8545 8546 30303 30303/udp
\ No newline at end of file
diff --git a/Dockerfile.alltools b/Dockerfile.alltools
index a4adba9d5b99..9019ff51738e 100644
--- a/Dockerfile.alltools
+++ b/Dockerfile.alltools
@@ -1,15 +1,15 @@
-# Build Geth in a stock Go builder container
+# Build Bor in a stock Go builder container
 FROM golang:1.12-alpine as builder
 
 RUN apk add --no-cache make gcc musl-dev linux-headers git
 
-ADD . /go-ethereum
-RUN cd /go-ethereum && make all
+ADD . /bor
+RUN cd /bor && make all
 
 # Pull all binaries into a second stage deploy alpine container
 FROM alpine:latest
 
 RUN apk add --no-cache ca-certificates
-COPY --from=builder /go-ethereum/build/bin/* /usr/local/bin/
+COPY --from=builder /bor/build/bin/* /usr/local/bin/
 
 EXPOSE 8545 8546 30303 30303/udp
diff --git a/Makefile b/Makefile
index 93a7a3ee2a11..6a9bd8ce4f9d 100644
--- a/Makefile
+++ b/Makefile
@@ -10,30 +10,36 @@
 
 GOBIN = $(shell pwd)/build/bin
 GO ?= latest
+GORUN = go run
+GOPATH = $(shell go env GOPATH)
 
 bor:
-	build/env.sh go run build/ci.go install ./cmd/bor
+	$(GORUN) build/ci.go install ./cmd/bor
+	mkdir -p $(GOPATH)/bin/
+	cp $(GOBIN)/bor $(GOPATH)/bin/
 	@echo "Done building."
 	@echo "Run \"$(GOBIN)/bor\" to launch bor."
 
 all:
-	build/env.sh go run build/ci.go install
+	$(GORUN) build/ci.go install
+	mkdir -p $(GOPATH)/bin/
+	cp $(GOBIN)/* $(GOPATH)/bin/
 
 android:
-	build/env.sh go run build/ci.go aar --local
+	$(GORUN) build/ci.go aar --local
 	@echo "Done building."
 	@echo "Import \"$(GOBIN)/bor.aar\" to use the library."
 
 ios:
-	build/env.sh go run build/ci.go xcode --local
+	$(GORUN) build/ci.go xcode --local
 	@echo "Done building."
 	@echo "Import \"$(GOBIN)/bor.framework\" to use the library."
 
 test: bor
-	go test github.com/maticnetwork/bor/consensus/bor_test
+	go test github.com/maticnetwork/bor/consensus/bor/bor_test
 
 lint: ## Run linters.
-	build/env.sh go run build/ci.go lint
+	$(GORUN) build/ci.go lint
 
 clean:
 	./build/clean_go_build_cache.sh
@@ -63,12 +69,12 @@ bor-linux: bor-linux-386 bor-linux-amd64 bor-linux-arm bor-linux-mips64 bor-linu
 	@ls -ld $(GOBIN)/bor-linux-*
 
 bor-linux-386:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/386 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/386 -v ./cmd/bor
 	@echo "Linux 386 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep 386
 
 bor-linux-amd64:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/amd64 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/amd64 -v ./cmd/bor
 	@echo "Linux amd64 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep amd64
 
@@ -77,42 +83,42 @@ bor-linux-arm: bor-linux-arm-5 bor-linux-arm-6 bor-linux-arm-7 bor-linux-arm64
 	@ls -ld $(GOBIN)/bor-linux-* | grep arm
 
 bor-linux-arm-5:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/arm-5 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/arm-5 -v ./cmd/bor
 	@echo "Linux ARMv5 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep arm-5
 
 bor-linux-arm-6:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/arm-6 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/arm-6 -v ./cmd/bor
 	@echo "Linux ARMv6 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep arm-6
 
 bor-linux-arm-7:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/arm-7 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/arm-7 -v ./cmd/bor
 	@echo "Linux ARMv7 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep arm-7
 
 bor-linux-arm64:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/arm64 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/arm64 -v ./cmd/bor
 	@echo "Linux ARM64 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep arm64
 
 bor-linux-mips:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/mips --ldflags '-extldflags "-static"' -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/mips --ldflags '-extldflags "-static"' -v ./cmd/bor
 	@echo "Linux MIPS cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep mips
 
 bor-linux-mipsle:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/mipsle --ldflags '-extldflags "-static"' -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/mipsle --ldflags '-extldflags "-static"' -v ./cmd/bor
 	@echo "Linux MIPSle cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep mipsle
 
 bor-linux-mips64:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/mips64 --ldflags '-extldflags "-static"' -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/mips64 --ldflags '-extldflags "-static"' -v ./cmd/bor
 	@echo "Linux MIPS64 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep mips64
 
 bor-linux-mips64le:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=linux/mips64le --ldflags '-extldflags "-static"' -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=linux/mips64le --ldflags '-extldflags "-static"' -v ./cmd/bor
 	@echo "Linux MIPS64le cross compilation done:"
 	@ls -ld $(GOBIN)/bor-linux-* | grep mips64le
 
@@ -121,12 +127,12 @@ bor-darwin: bor-darwin-386 bor-darwin-amd64
 	@ls -ld $(GOBIN)/bor-darwin-*
 
 bor-darwin-386:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=darwin/386 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=darwin/386 -v ./cmd/bor
 	@echo "Darwin 386 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-darwin-* | grep 386
 
 bor-darwin-amd64:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=darwin/amd64 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=darwin/amd64 -v ./cmd/bor
 	@echo "Darwin amd64 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-darwin-* | grep amd64
 
@@ -135,11 +141,11 @@ bor-windows: bor-windows-386 bor-windows-amd64
 	@ls -ld $(GOBIN)/bor-windows-*
 
 bor-windows-386:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=windows/386 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=windows/386 -v ./cmd/bor
 	@echo "Windows 386 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-windows-* | grep 386
 
 bor-windows-amd64:
-	build/env.sh go run build/ci.go xgo -- --go=$(GO) --targets=windows/amd64 -v ./cmd/bor
+	$(GORUN) build/ci.go xgo -- --go=$(GO) --targets=windows/amd64 -v ./cmd/bor
 	@echo "Windows amd64 cross compilation done:"
 	@ls -ld $(GOBIN)/bor-windows-* | grep amd64
diff --git a/accounts/abi/abi.go b/accounts/abi/abi.go
index ba242b14e588..5a6cb007342e 100644
--- a/accounts/abi/abi.go
+++ b/accounts/abi/abi.go
@@ -114,12 +114,13 @@ func (abi ABI) UnpackIntoMap(v map[string]interface{}, name string, data []byte)
 // UnmarshalJSON implements json.Unmarshaler interface
 func (abi *ABI) UnmarshalJSON(data []byte) error {
 	var fields []struct {
-		Type      string
-		Name      string
-		Constant  bool
-		Anonymous bool
-		Inputs    []Argument
-		Outputs   []Argument
+		Type            string
+		Name            string
+		Constant        bool
+		StateMutability string
+		Anonymous       bool
+		Inputs          []Argument
+		Outputs         []Argument
 	}
 
 	if err := json.Unmarshal(data, &fields); err != nil {
@@ -142,9 +143,10 @@ func (abi *ABI) UnmarshalJSON(data []byte) error {
 				name = fmt.Sprintf("%s%d", field.Name, idx)
 				_, ok = abi.Methods[name]
 			}
+			isConst := field.Constant || field.StateMutability == "pure" || field.StateMutability == "view"
 			abi.Methods[name] = Method{
 				Name:    name,
-				Const:   field.Constant,
+				Const:   isConst,
 				Inputs:  field.Inputs,
 				Outputs: field.Outputs,
 			}
diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go
index 58c2c4a44d95..a161fb0c9501 100644
--- a/accounts/abi/bind/backends/simulated.go
+++ b/accounts/abi/bind/backends/simulated.go
@@ -510,6 +510,9 @@ func (fb *filterBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEve
 func (fb *filterBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
 	return fb.bc.SubscribeLogsEvent(ch)
 }
+func (fb *filterBackend) SubscribeStateEvent(ch chan<- core.NewStateChangeEvent) event.Subscription {
+	return fb.bc.SubscribeStateEvent(ch)
+}
 
 func (fb *filterBackend) BloomStatus() (uint64, uint64) { return 4096, 0 }
 func (fb *filterBackend) ServiceFilter(ctx context.Context, ms *bloombits.MatcherSession) {
diff --git a/build/ci.go b/build/ci.go
index cec9b00a0aa1..6ed0bf7f6ffa 100644
--- a/build/ci.go
+++ b/build/ci.go
@@ -58,6 +58,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/cespare/cp"
 	"github.com/maticnetwork/bor/internal/build"
 	"github.com/maticnetwork/bor/params"
 )
@@ -137,7 +138,20 @@ var (
 	// Note: yakkety is unsupported because it was officially deprecated on Launchpad.
 	// Note: zesty is unsupported because it was officially deprecated on Launchpad.
 	// Note: artful is unsupported because it was officially deprecated on Launchpad.
-	debDistros = []string{"trusty", "xenial", "bionic", "cosmic", "disco"}
+	// Note: cosmic is unsupported because it was officially deprecated on Launchpad.
+	debDistroGoBoots = map[string]string{
+		"trusty": "golang-1.11",
+		"xenial": "golang-go",
+		"bionic": "golang-go",
+		"disco":  "golang-go",
+		"eoan":   "golang-go",
+		"focal":  "golang-go",
+	}
+
+	debGoBootPaths = map[string]string{
+		"golang-1.11": "/usr/lib/go-1.11",
+		"golang-go":   "/usr/lib/go",
+	}
 )
 
 var GOBIN, _ = filepath.Abs(filepath.Join("build", "bin"))
@@ -201,9 +215,9 @@ func doInstall(cmdline []string) {
 		var minor int
 		fmt.Sscanf(strings.TrimPrefix(runtime.Version(), "go1."), "%d", &minor)
 
-		if minor < 9 {
+		if minor < 11 {
 			log.Println("You have Go version", runtime.Version())
-			log.Println("go-ethereum requires at least Go version 1.9 and cannot")
+			log.Println("go-ethereum requires at least Go version 1.11 and cannot")
 			log.Println("be compiled with an earlier version. Please upgrade your Go installation.")
 			os.Exit(1)
 		}
@@ -213,22 +227,18 @@ func doInstall(cmdline []string) {
 	if flag.NArg() > 0 {
 		packages = flag.Args()
 	}
-	packages = build.ExpandPackagesNoVendor(packages)
 
 	if *arch == "" || *arch == runtime.GOARCH {
 		goinstall := goTool("install", buildFlags(env)...)
+		if runtime.GOARCH == "arm64" {
+			goinstall.Args = append(goinstall.Args, "-p", "1")
+		}
 		goinstall.Args = append(goinstall.Args, "-v")
 		goinstall.Args = append(goinstall.Args, packages...)
 		build.MustRun(goinstall)
 		return
 	}
-	// If we are cross compiling to ARMv5 ARMv6 or ARMv7, clean any previous builds
-	if *arch == "arm" {
-		os.RemoveAll(filepath.Join(runtime.GOROOT(), "pkg", runtime.GOOS+"_arm"))
-		for _, path := range filepath.SplitList(build.GOPATH()) {
-			os.RemoveAll(filepath.Join(path, "pkg", runtime.GOOS+"_arm"))
-		}
-	}
+
 	// Seems we are cross compiling, work around forbidden GOBIN
 	goinstall := goToolArch(*arch, *cc, "install", buildFlags(env)...)
 	goinstall.Args = append(goinstall.Args, "-v")
@@ -278,7 +288,6 @@ func goTool(subcmd string, args ...string) *exec.Cmd {
 
 func goToolArch(arch string, cc string, subcmd string, args ...string) *exec.Cmd {
 	cmd := build.GoTool(subcmd, args...)
-	cmd.Env = []string{"GOPATH=" + build.GOPATH()}
 	if arch == "" || arch == runtime.GOARCH {
 		cmd.Env = append(cmd.Env, "GOBIN="+GOBIN)
 	} else {
@@ -289,7 +298,7 @@ func goToolArch(arch string, cc string, subcmd string, args ...string) *exec.Cmd
 		cmd.Env = append(cmd.Env, "CC="+cc)
 	}
 	for _, e := range os.Environ() {
-		if strings.HasPrefix(e, "GOPATH=") || strings.HasPrefix(e, "GOBIN=") {
+		if strings.HasPrefix(e, "GOBIN=") {
 			continue
 		}
 		cmd.Env = append(cmd.Env, e)
@@ -303,6 +312,7 @@ func goToolArch(arch string, cc string, subcmd string, args ...string) *exec.Cmd
 
 func doTest(cmdline []string) {
 	coverage := flag.Bool("coverage", false, "Whether to record code coverage")
+	verbose := flag.Bool("v", false, "Whether to log verbosely")
 	flag.CommandLine.Parse(cmdline)
 	env := build.Env()
 
@@ -310,7 +320,6 @@ func doTest(cmdline []string) {
 	if len(flag.CommandLine.Args()) > 0 {
 		packages = flag.CommandLine.Args()
 	}
-	packages = build.ExpandPackagesNoVendor(packages)
 
 	// Run the actual tests.
 	// Test a single package at a time. CI builders are slow
@@ -320,44 +329,46 @@ func doTest(cmdline []string) {
 	if *coverage {
 		gotest.Args = append(gotest.Args, "-covermode=atomic", "-cover")
 	}
+	if *verbose {
+		gotest.Args = append(gotest.Args, "-v")
+	}
 
 	gotest.Args = append(gotest.Args, packages...)
 	build.MustRun(gotest)
 }
 
-// runs gometalinter on requested packages
+// doLint runs golangci-lint on requested packages.
 func doLint(cmdline []string) {
+	var (
+		cachedir = flag.String("cachedir", "./build/cache", "directory for caching golangci-lint binary.")
+	)
 	flag.CommandLine.Parse(cmdline)
-
 	packages := []string{"./..."}
 	if len(flag.CommandLine.Args()) > 0 {
 		packages = flag.CommandLine.Args()
 	}
-	// Get metalinter and install all supported linters
-	build.MustRun(goTool("get", "gopkg.in/alecthomas/gometalinter.v2"))
-	build.MustRunCommand(filepath.Join(GOBIN, "gometalinter.v2"), "--install")
-
-	// Run fast linters batched together
-	configs := []string{
-		"--vendor",
-		"--tests",
-		"--deadline=2m",
-		"--disable-all",
-		"--enable=goimports",
-		"--enable=varcheck",
-		"--enable=vet",
-		"--enable=gofmt",
-		"--enable=misspell",
-		"--enable=goconst",
-		"--min-occurrences=6", // for goconst
-	}
-	build.MustRunCommand(filepath.Join(GOBIN, "gometalinter.v2"), append(configs, packages...)...)
-
-	// Run slow linters one by one
-	for _, linter := range []string{"unconvert", "gosimple"} {
-		configs = []string{"--vendor", "--tests", "--deadline=10m", "--disable-all", "--enable=" + linter}
-		build.MustRunCommand(filepath.Join(GOBIN, "gometalinter.v2"), append(configs, packages...)...)
+
+	linter := downloadLinter(*cachedir)
+	lflags := []string{"run", "--config", ".golangci.yml"}
+	build.MustRunCommand(linter, append(lflags, packages...)...)
+	fmt.Println("You have achieved perfection.")
+}
+
+// downloadLinter downloads and unpacks golangci-lint.
+func downloadLinter(cachedir string) string {
+	const version = "1.22.2"
+
+	csdb := build.MustLoadChecksums("build/checksums.txt")
+	base := fmt.Sprintf("golangci-lint-%s-%s-%s", version, runtime.GOOS, runtime.GOARCH)
+	url := fmt.Sprintf("https://github.com/golangci/golangci-lint/releases/download/v%s/%s.tar.gz", version, base)
+	archivePath := filepath.Join(cachedir, base+".tar.gz")
+	if err := csdb.DownloadFile(url, archivePath); err != nil {
+		log.Fatal(err)
 	}
+	if err := build.ExtractTarballArchive(archivePath, cachedir); err != nil {
+		log.Fatal(err)
+	}
+	return filepath.Join(cachedir, base, "golangci-lint")
 }
 
 // Release Packaging
@@ -460,11 +471,13 @@ func maybeSkipArchive(env build.Environment) {
 // Debian Packaging
 func doDebianSource(cmdline []string) {
 	var (
-		signer  = flag.String("signer", "", `Signing key name, also used as package author`)
-		upload  = flag.String("upload", "", `Where to upload the source package (usually "ethereum/ethereum")`)
-		sshUser = flag.String("sftp-user", "", `Username for SFTP upload (usually "geth-ci")`)
-		workdir = flag.String("workdir", "", `Output directory for packages (uses temp dir if unset)`)
-		now     = time.Now()
+		goversion = flag.String("goversion", "", `Go version to build with (will be included in the source package)`)
+		cachedir  = flag.String("cachedir", "./build/cache", `Filesystem path to cache the downloaded Go bundles at`)
+		signer    = flag.String("signer", "", `Signing key name, also used as package author`)
+		upload    = flag.String("upload", "", `Where to upload the source package (usually "ethereum/ethereum")`)
+		sshUser   = flag.String("sftp-user", "", `Username for SFTP upload (usually "geth-ci")`)
+		workdir   = flag.String("workdir", "", `Output directory for packages (uses temp dir if unset)`)
+		now       = time.Now()
 	)
 	flag.CommandLine.Parse(cmdline)
 	*workdir = makeWorkdir(*workdir)
@@ -478,12 +491,39 @@ func doDebianSource(cmdline []string) {
 		build.MustRun(gpg)
 	}
 
-	// Create Debian packages and upload them
+	// Download and verify the Go source package.
+	gobundle := downloadGoSources(*goversion, *cachedir)
+
+	// Download all the dependencies needed to build the sources and run the ci script
+	srcdepfetch := goTool("install", "-n", "./...")
+	srcdepfetch.Env = append(os.Environ(), "GOPATH="+filepath.Join(*workdir, "modgopath"))
+	build.MustRun(srcdepfetch)
+
+	cidepfetch := goTool("run", "./build/ci.go")
+	cidepfetch.Env = append(os.Environ(), "GOPATH="+filepath.Join(*workdir, "modgopath"))
+	cidepfetch.Run() // Command fails, don't care, we only need the deps to start it
+
+	// Create Debian packages and upload them.
 	for _, pkg := range debPackages {
-		for _, distro := range debDistros {
-			meta := newDebMetadata(distro, *signer, env, now, pkg.Name, pkg.Version, pkg.Executables)
+		for distro, goboot := range debDistroGoBoots {
+			// Prepare the debian package with the go-ethereum sources.
+			meta := newDebMetadata(distro, goboot, *signer, env, now, pkg.Name, pkg.Version, pkg.Executables)
 			pkgdir := stageDebianSource(*workdir, meta)
-			debuild := exec.Command("debuild", "-S", "-sa", "-us", "-uc", "-d", "-Zxz")
+
+			// Add Go source code
+			if err := build.ExtractTarballArchive(gobundle, pkgdir); err != nil {
+				log.Fatalf("Failed to extract Go sources: %v", err)
+			}
+			if err := os.Rename(filepath.Join(pkgdir, "go"), filepath.Join(pkgdir, ".go")); err != nil {
+				log.Fatalf("Failed to rename Go source folder: %v", err)
+			}
+			// Add all dependency modules in compressed form
+			os.MkdirAll(filepath.Join(pkgdir, ".mod", "cache"), 0755)
+			if err := cp.CopyAll(filepath.Join(pkgdir, ".mod", "cache", "download"), filepath.Join(*workdir, "modgopath", "pkg", "mod", "cache", "download")); err != nil {
+				log.Fatalf("Failed to copy Go module dependencies: %v", err)
+			}
+			// Run the packaging and upload to the PPA
+			debuild := exec.Command("debuild", "-S", "-sa", "-us", "-uc", "-d", "-Zxz", "-nc")
 			debuild.Dir = pkgdir
 			build.MustRun(debuild)
 
@@ -503,6 +543,17 @@ func doDebianSource(cmdline []string) {
 	}
 }
 
+func downloadGoSources(version string, cachedir string) string {
+	csdb := build.MustLoadChecksums("build/checksums.txt")
+	file := fmt.Sprintf("go%s.src.tar.gz", version)
+	url := "https://dl.google.com/go/" + file
+	dst := filepath.Join(cachedir, file)
+	if err := csdb.DownloadFile(url, dst); err != nil {
+		log.Fatal(err)
+	}
+	return dst
+}
+
 func ppaUpload(workdir, ppa, sshUser string, files []string) {
 	p := strings.Split(ppa, "/")
 	if len(p) != 2 {
@@ -562,7 +613,9 @@ type debPackage struct {
 }
 
 type debMetadata struct {
-	Env build.Environment
+	Env           build.Environment
+	GoBootPackage string
+	GoBootPath    string
 
 	PackageName string
 
@@ -591,19 +644,21 @@ func (d debExecutable) Package() string {
 	return d.BinaryName
 }
 
-func newDebMetadata(distro, author string, env build.Environment, t time.Time, name string, version string, exes []debExecutable) debMetadata {
+func newDebMetadata(distro, goboot, author string, env build.Environment, t time.Time, name string, version string, exes []debExecutable) debMetadata {
 	if author == "" {
 		// No signing key, use default author.
 		author = "Ethereum Builds <fjl@ethereum.org>"
 	}
 	return debMetadata{
-		PackageName: name,
-		Env:         env,
-		Author:      author,
-		Distro:      distro,
-		Version:     version,
-		Time:        t.Format(time.RFC1123Z),
-		Executables: exes,
+		GoBootPackage: goboot,
+		GoBootPath:    debGoBootPaths[goboot],
+		PackageName:   name,
+		Env:           env,
+		Author:        author,
+		Distro:        distro,
+		Version:       version,
+		Time:          t.Format(time.RFC1123Z),
+		Executables:   exes,
 	}
 }
 
@@ -668,7 +723,6 @@ func stageDebianSource(tmpdir string, meta debMetadata) (pkgdir string) {
 	if err := os.Mkdir(pkgdir, 0755); err != nil {
 		log.Fatal(err)
 	}
-
 	// Copy the source code.
 	build.MustRunCommand("git", "checkout-index", "-a", "--prefix", pkgdir+string(filepath.Separator))
 
@@ -686,7 +740,6 @@ func stageDebianSource(tmpdir string, meta debMetadata) (pkgdir string) {
 		build.Render("build/deb/"+meta.PackageName+"/deb.install", install, 0644, exe)
 		build.Render("build/deb/"+meta.PackageName+"/deb.docs", docs, 0644, exe)
 	}
-
 	return pkgdir
 }
 
@@ -715,7 +768,7 @@ func doWindowsInstaller(cmdline []string) {
 			continue
 		}
 		allTools = append(allTools, filepath.Base(file))
-		if filepath.Base(file) == "geth.exe" {
+		if filepath.Base(file) == "bor.exe" {
 			gethTool = file
 		} else {
 			devTools = append(devTools, file)
@@ -729,14 +782,17 @@ func doWindowsInstaller(cmdline []string) {
 		"Geth":     gethTool,
 		"DevTools": devTools,
 	}
-	build.Render("build/nsis.geth.nsi", filepath.Join(*workdir, "geth.nsi"), 0644, nil)
+	build.Render("build/nsis.bor.nsi", filepath.Join(*workdir, "bor.nsi"), 0644, nil)
 	build.Render("build/nsis.install.nsh", filepath.Join(*workdir, "install.nsh"), 0644, templateData)
 	build.Render("build/nsis.uninstall.nsh", filepath.Join(*workdir, "uninstall.nsh"), 0644, allTools)
 	build.Render("build/nsis.pathupdate.nsh", filepath.Join(*workdir, "PathUpdate.nsh"), 0644, nil)
 	build.Render("build/nsis.envvarupdate.nsh", filepath.Join(*workdir, "EnvVarUpdate.nsh"), 0644, nil)
-	build.CopyFile(filepath.Join(*workdir, "SimpleFC.dll"), "build/nsis.simplefc.dll", 0755)
-	build.CopyFile(filepath.Join(*workdir, "COPYING"), "COPYING", 0755)
-
+	if err := cp.CopyFile(filepath.Join(*workdir, "SimpleFC.dll"), "build/nsis.simplefc.dll"); err != nil {
+		log.Fatal("Failed to copy SimpleFC.dll: %v", err)
+	}
+	if err := cp.CopyFile(filepath.Join(*workdir, "COPYING"), "COPYING"); err != nil {
+		log.Fatal("Failed to copy copyright note: %v", err)
+	}
 	// Build the installer. This assumes that all the needed files have been previously
 	// built (don't mix building and packaging to keep cross compilation complexity to a
 	// minimum).
@@ -744,16 +800,15 @@ func doWindowsInstaller(cmdline []string) {
 	if env.Commit != "" {
 		version[2] += "-" + env.Commit[:8]
 	}
-	installer, _ := filepath.Abs("geth-" + archiveBasename(*arch, params.ArchiveVersion(env.Commit)) + ".exe")
+	installer, _ := filepath.Abs("bor-" + archiveBasename(*arch, params.ArchiveVersion(env.Commit)) + ".exe")
 	build.MustRunCommand("makensis.exe",
 		"/DOUTPUTFILE="+installer,
 		"/DMAJORVERSION="+version[0],
 		"/DMINORVERSION="+version[1],
 		"/DBUILDVERSION="+version[2],
 		"/DARCH="+*arch,
-		filepath.Join(*workdir, "geth.nsi"),
+		filepath.Join(*workdir, "bor.nsi"),
 	)
-
 	// Sign and publish installer.
 	if err := archiveUpload(installer, *upload, *signer); err != nil {
 		log.Fatal(err)
@@ -826,7 +881,6 @@ func gomobileTool(subcmd string, args ...string) *exec.Cmd {
 	cmd := exec.Command(filepath.Join(GOBIN, "gomobile"), subcmd)
 	cmd.Args = append(cmd.Args, args...)
 	cmd.Env = []string{
-		"GOPATH=" + build.GOPATH(),
 		"PATH=" + GOBIN + string(os.PathListSeparator) + os.Getenv("PATH"),
 	}
 	for _, e := range os.Environ() {
@@ -899,7 +953,7 @@ func doXCodeFramework(cmdline []string) {
 	// Build the iOS XCode framework
 	build.MustRun(goTool("get", "golang.org/x/mobile/cmd/gomobile", "golang.org/x/mobile/cmd/gobind"))
 	build.MustRun(gomobileTool("init"))
-	bind := gomobileTool("bind", "-ldflags", "-s -w", "--target", "ios", "--tags", "ios", "-v", "github.com/maticnetwork/bor/mobile")
+	bind := gomobileTool("bind", "-ldflags", "-s -w", "--target", "ios", "-v", "github.com/maticnetwork/bor/mobile")
 
 	if *local {
 		// If we're building locally, use the build folder and stop afterwards
@@ -907,7 +961,7 @@ func doXCodeFramework(cmdline []string) {
 		build.MustRun(bind)
 		return
 	}
-	archive := "geth-" + archiveBasename("ios", params.ArchiveVersion(env.Commit))
+	archive := "bor-" + archiveBasename("ios", params.ArchiveVersion(env.Commit))
 	if err := os.Mkdir(archive, os.ModePerm); err != nil {
 		log.Fatal(err)
 	}
@@ -1014,16 +1068,10 @@ func doXgo(cmdline []string) {
 
 func xgoTool(args []string) *exec.Cmd {
 	cmd := exec.Command(filepath.Join(GOBIN, "xgo"), args...)
-	cmd.Env = []string{
-		"GOPATH=" + build.GOPATH(),
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, []string{
 		"GOBIN=" + GOBIN,
-	}
-	for _, e := range os.Environ() {
-		if strings.HasPrefix(e, "GOPATH=") || strings.HasPrefix(e, "GOBIN=") {
-			continue
-		}
-		cmd.Env = append(cmd.Env, e)
-	}
+	}...)
 	return cmd
 }
 
diff --git a/build/env.sh b/build/env.sh
deleted file mode 100755
index acbc70c57638..000000000000
--- a/build/env.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/sh
-
-set -e
-
-if [ ! -f "build/env.sh" ]; then
-    echo "$0 must be run from the root of the repository."
-    exit 2
-fi
-
-# Create fake Go workspace if it doesn't exist yet.
-workspace="$PWD/build/_workspace"
-root="$PWD"
-ethdir="$workspace/src/github.com/maticnetwork"
-if [ ! -L "$ethdir/bor" ]; then
-    mkdir -p "$ethdir"
-    cd "$ethdir"
-    ln -s ../../../../../. bor
-    cd "$root"
-fi
-
-# Set up the environment to use the workspace.
-GOPATH="$workspace"
-export GOPATH
-
-# Run the command inside the workspace.
-cd "$ethdir/bor"
-PWD="$ethdir/bor"
-
-# Launch the arguments with the configured environment.
-exec "$@"
diff --git a/cmd/bor/chaincmd.go b/cmd/bor/chaincmd.go
index 0f7c71a175a7..bbb8792a16e8 100644
--- a/cmd/bor/chaincmd.go
+++ b/cmd/bor/chaincmd.go
@@ -61,7 +61,7 @@ It expects the genesis file as argument.`,
 		Action:    utils.MigrateFlags(importChain),
 		Name:      "import",
 		Usage:     "Import a blockchain file",
-		ArgsUsage: "<filename> (<filename 2> ... <filename N>) ",
+		ArgsUsage: "<filename> (<filename 2> ... <filename N>) <genesisPath>",
 		Flags: []cli.Flag{
 			utils.DataDirFlag,
 			utils.CacheFlag,
@@ -228,8 +228,8 @@ func initGenesis(ctx *cli.Context) error {
 }
 
 func importChain(ctx *cli.Context) error {
-	if len(ctx.Args()) < 1 {
-		utils.Fatalf("This command requires an argument.")
+	if len(ctx.Args()) < 2 {
+		utils.Fatalf("This command requires atleast 2 arguments.")
 	}
 	stack := makeFullNode(ctx)
 	defer stack.Close()
@@ -255,12 +255,13 @@ func importChain(ctx *cli.Context) error {
 	// Import the chain
 	start := time.Now()
 
-	if len(ctx.Args()) == 1 {
+	// ArgsUsage: "<filename> (<filename 2> ... <filename N>) <genesisPath>",
+	if len(ctx.Args()) == 2 {
 		if err := utils.ImportChain(chain, ctx.Args().First()); err != nil {
 			log.Error("Import error", "err", err)
 		}
 	} else {
-		for _, arg := range ctx.Args() {
+		for _, arg := range ctx.Args()[:len(ctx.Args())-1] {
 			if err := utils.ImportChain(chain, arg); err != nil {
 				log.Error("Import error", "file", arg, "err", err)
 			}
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 920071cf736d..94f79edc6605 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -19,6 +19,7 @@ package utils
 
 import (
 	"crypto/ecdsa"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io/ioutil"
@@ -34,6 +35,7 @@ import (
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/common/fdlimit"
 	"github.com/maticnetwork/bor/consensus"
+
 	"github.com/maticnetwork/bor/consensus/bor"
 	"github.com/maticnetwork/bor/consensus/clique"
 	"github.com/maticnetwork/bor/consensus/ethash"
@@ -47,6 +49,8 @@ import (
 	"github.com/maticnetwork/bor/ethdb"
 	"github.com/maticnetwork/bor/ethstats"
 	"github.com/maticnetwork/bor/graphql"
+
+	pcsclite "github.com/gballet/go-libpcsclite"
 	"github.com/maticnetwork/bor/les"
 	"github.com/maticnetwork/bor/log"
 	"github.com/maticnetwork/bor/metrics"
@@ -61,7 +65,6 @@ import (
 	"github.com/maticnetwork/bor/params"
 	"github.com/maticnetwork/bor/rpc"
 	whisper "github.com/maticnetwork/bor/whisper/whisperv6"
-	pcsclite "github.com/gballet/go-libpcsclite"
 	cli "gopkg.in/urfave/cli.v1"
 )
 
@@ -1658,19 +1661,63 @@ func MakeGenesis(ctx *cli.Context) *core.Genesis {
 	return genesis
 }
 
+func getGenesis(genesisPath string) *core.Genesis {
+	log.Info("Reading genesis at ", "file", genesisPath)
+	file, _ := os.Open(genesisPath)
+	defer file.Close()
+
+	genesis := new(core.Genesis)
+	json.NewDecoder(file).Decode(genesis)
+	return genesis
+}
+
 // MakeChain creates a chain manager from set command line flags.
 func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chainDb ethdb.Database) {
+	// expecting the last argument to be the genesis file
+	genesis := getGenesis(ctx.Args().Get(len(ctx.Args()) - 1))
+
 	var err error
 	chainDb = MakeChainDatabase(ctx, stack)
-	config, _, err := core.SetupGenesisBlock(chainDb, MakeGenesis(ctx))
+	config, _, err := core.SetupGenesisBlock(chainDb, genesis)
 	if err != nil {
 		Fatalf("%v", err)
 	}
+
 	var engine consensus.Engine
+	var ethereum *eth.Ethereum
 	if config.Clique != nil {
 		engine = clique.New(config.Clique, chainDb)
 	} else if config.Bor != nil {
-		engine = bor.New(config, chainDb, nil)
+		cfg := &eth.Config{Genesis: genesis}
+		workspace, err := ioutil.TempDir("", "console-tester-")
+		if err != nil {
+			Fatalf("failed to create temporary keystore: %v", err)
+		}
+
+		// Create a networkless protocol stack and start an Ethereum service within
+		stack, err := node.New(&node.Config{DataDir: workspace, UseLightweightKDF: true, Name: "console-tester"})
+		if err != nil {
+			Fatalf("failed to create node: %v", err)
+		}
+		err = stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
+			s, err := eth.New(ctx, cfg)
+			return s, err
+		})
+		if err != nil {
+			Fatalf("failed to register Ethereum protocol: %v", err)
+		}
+
+		// Start the node and assemble the JavaScript console around it
+		if err = stack.Start(); err != nil {
+			Fatalf("failed to start test stack: %v", err)
+		}
+		_, err = stack.Attach()
+		if err != nil {
+			Fatalf("failed to attach to node: %v", err)
+		}
+
+		stack.Service(&ethereum)
+		engine = ethereum.Engine().(*bor.Bor)
 	} else {
 		engine = ethash.NewFaker()
 		if !ctx.GlobalBool(FakePoWFlag.Name) {
@@ -1702,6 +1749,9 @@ func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chai
 	}
 	vmcfg := vm.Config{EnablePreimageRecording: ctx.GlobalBool(VMEnableDebugFlag.Name)}
 	chain, err = core.NewBlockChain(chainDb, cache, config, engine, vmcfg, nil)
+	if ethereum != nil {
+		ethereum.SetBlockchain(chain)
+	}
 	if err != nil {
 		Fatalf("Can't create BlockChain: %v", err)
 	}
diff --git a/consensus/bor/bor.go b/consensus/bor/bor.go
index d84288d42900..bd55a745e7c9 100644
--- a/consensus/bor/bor.go
+++ b/consensus/bor/bor.go
@@ -30,6 +30,7 @@ import (
 	"github.com/maticnetwork/bor/core/vm"
 	"github.com/maticnetwork/bor/crypto"
 	"github.com/maticnetwork/bor/ethdb"
+	"github.com/maticnetwork/bor/event"
 	"github.com/maticnetwork/bor/internal/ethapi"
 	"github.com/maticnetwork/bor/log"
 	"github.com/maticnetwork/bor/params"
@@ -245,6 +246,8 @@ type Bor struct {
 	stateReceiverABI abi.ABI
 	HeimdallClient   IHeimdallClient
 
+	stateDataFeed event.Feed
+	scope         event.SubscriptionScope
 	// The fields below are for testing only
 	fakeDiff bool // Skip difficulty verifications
 }
@@ -1201,6 +1204,16 @@ func (c *Bor) CommitStates(
 			"txHash", eventRecord.TxHash,
 			"chainID", eventRecord.ChainID,
 		)
+		stateData := types.StateData{
+			Did:      eventRecord.ID,
+			Contract: eventRecord.Contract,
+			Data:     hex.EncodeToString(eventRecord.Data),
+			TxHash:   eventRecord.TxHash,
+		}
+
+		go func() {
+			c.stateDataFeed.Send(core.NewStateChangeEvent{StateData: &stateData})
+		}()
 
 		recordBytes, err := rlp.EncodeToBytes(eventRecord)
 		if err != nil {
@@ -1226,6 +1239,11 @@ func (c *Bor) CommitStates(
 	return nil
 }
 
+// SubscribeStateEvent registers a subscription of ChainSideEvent.
+func (c *Bor) SubscribeStateEvent(ch chan<- core.NewStateChangeEvent) event.Subscription {
+	return c.scope.Track(c.stateDataFeed.Subscribe(ch))
+}
+
 func (c *Bor) SetHeimdallClient(h IHeimdallClient) {
 	c.HeimdallClient = h
 }
@@ -1253,6 +1271,10 @@ func (c *Bor) IsValidatorAction(chain consensus.ChainReader, from common.Address
 func isProposeSpanAction(tx *types.Transaction, validatorContract string) bool {
 	// keccak256('proposeSpan()').slice(0, 4)
 	proposeSpanSig, _ := hex.DecodeString("4b0e4d17")
+	if tx.Data() == nil || len(tx.Data()) < 4 {
+		return false
+	}
+
 	return bytes.Compare(proposeSpanSig, tx.Data()[:4]) == 0 &&
 		tx.To().String() == validatorContract
 }
@@ -1260,6 +1282,10 @@ func isProposeSpanAction(tx *types.Transaction, validatorContract string) bool {
 func isProposeStateAction(tx *types.Transaction, stateReceiverContract string) bool {
 	// keccak256('proposeState(uint256)').slice(0, 4)
 	proposeStateSig, _ := hex.DecodeString("ede01f17")
+	if tx.Data() == nil || len(tx.Data()) < 4 {
+		return false
+	}
+
 	return bytes.Compare(proposeStateSig, tx.Data()[:4]) == 0 &&
 		tx.To().String() == stateReceiverContract
 }
diff --git a/consensus/bor_test/bor_test.go b/consensus/bor/bor_test/bor_test.go
similarity index 51%
rename from consensus/bor_test/bor_test.go
rename to consensus/bor/bor_test/bor_test.go
index 88eb9245b556..ce1585f6f2f8 100644
--- a/consensus/bor_test/bor_test.go
+++ b/consensus/bor/bor_test/bor_test.go
@@ -1,41 +1,20 @@
-package bor_test
+package bortest
 
 import (
 	"encoding/hex"
-	"encoding/json"
-	"io/ioutil"
 	"math/big"
 	"testing"
 
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/consensus/bor"
-	"github.com/maticnetwork/bor/core"
 	"github.com/maticnetwork/bor/core/rawdb"
-	"github.com/maticnetwork/bor/core/state"
-	"github.com/maticnetwork/bor/crypto/secp256k1"
 	"github.com/stretchr/testify/assert"
 
 	"github.com/maticnetwork/bor/core/types"
-	"github.com/maticnetwork/bor/crypto"
-	"github.com/maticnetwork/bor/eth"
 
-	"github.com/maticnetwork/bor/ethdb"
 	"github.com/maticnetwork/bor/mocks"
-	"github.com/maticnetwork/bor/node"
 )
 
-var (
-	extraSeal = 65 // Fixed number of extra-data suffix bytes reserved for signer seal
-	privKey   = "b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291"
-	key, _    = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
-	addr      = crypto.PubkeyToAddress(key.PublicKey) // 0x71562b71999873DB5b286dF957af199Ec94617F7
-)
-
-type initializeData struct {
-	genesis  *core.Genesis
-	ethereum *eth.Ethereum
-}
-
 func TestCommitSpan(t *testing.T) {
 	init := buildEthereumInstance(t, rawdb.NewMemoryDatabase())
 	chain := init.ethereum.BlockChain()
@@ -150,104 +129,3 @@ func TestIsValidatorAction(t *testing.T) {
 		assert.True(t, _bor.IsValidatorAction(chain, _addr, tx))
 	}
 }
-
-func buildEthereumInstance(t *testing.T, db ethdb.Database) *initializeData {
-	genesisData, err := ioutil.ReadFile("genesis.json")
-	if err != nil {
-		t.Fatalf("%s", err)
-	}
-	gen := &core.Genesis{}
-	if err := json.Unmarshal(genesisData, gen); err != nil {
-		t.Fatalf("%s", err)
-	}
-	ethConf := &eth.Config{
-		Genesis: gen,
-	}
-	ethConf.Genesis.MustCommit(db)
-
-	// Create a temporary storage for the node keys and initialize it
-	workspace, err := ioutil.TempDir("", "console-tester-")
-	if err != nil {
-		t.Fatalf("failed to create temporary keystore: %v", err)
-	}
-
-	// Create a networkless protocol stack and start an Ethereum service within
-	stack, err := node.New(&node.Config{DataDir: workspace, UseLightweightKDF: true, Name: "console-tester"})
-	if err != nil {
-		t.Fatalf("failed to create node: %v", err)
-	}
-	err = stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
-		s, err := eth.New(ctx, ethConf)
-		return s, err
-	})
-	if err != nil {
-		t.Fatalf("failed to register Ethereum protocol: %v", err)
-	}
-
-	// Start the node and assemble the JavaScript console around it
-	if err = stack.Start(); err != nil {
-		t.Fatalf("failed to start test stack: %v", err)
-	}
-	_, err = stack.Attach()
-	if err != nil {
-		t.Fatalf("failed to attach to node: %v", err)
-	}
-
-	var ethereum *eth.Ethereum
-	stack.Service(&ethereum)
-	ethConf.Genesis.MustCommit(ethereum.ChainDb())
-	return &initializeData{
-		genesis:  gen,
-		ethereum: ethereum,
-	}
-}
-
-func insertNewBlock(t *testing.T, _bor *bor.Bor, chain *core.BlockChain, header *types.Header, statedb *state.StateDB, privKey []byte) {
-	_, err := _bor.FinalizeAndAssemble(chain, header, statedb, nil, nil, nil)
-	if err != nil {
-		t.Fatalf("%s", err)
-	}
-
-	sig, err := secp256k1.Sign(crypto.Keccak256(bor.BorRLP(header)), privKey)
-	if err != nil {
-		t.Fatalf("%s", err)
-	}
-	copy(header.Extra[len(header.Extra)-extraSeal:], sig)
-
-	block := types.NewBlockWithHeader(header)
-	if _, err := chain.InsertChain([]*types.Block{block}); err != nil {
-		t.Fatalf("%s", err)
-	}
-}
-
-func buildMinimalNextHeader(t *testing.T, block *types.Block, period uint64) *types.Header {
-	header := block.Header()
-	header.Number.Add(header.Number, big.NewInt(1))
-	header.ParentHash = block.Hash()
-	header.Time += (period + 1)
-	header.Extra = make([]byte, 97) // vanity (32) + extraSeal (65)
-	_key, _ := hex.DecodeString(privKey)
-	sig, err := secp256k1.Sign(crypto.Keccak256(bor.BorRLP(header)), _key)
-	if err != nil {
-		t.Fatalf("%s", err)
-	}
-	copy(header.Extra[len(header.Extra)-extraSeal:], sig)
-	return header
-}
-
-func loadSpanFromFile(t *testing.T) (*bor.ResponseWithHeight, *bor.HeimdallSpan) {
-	spanData, err := ioutil.ReadFile("span.json")
-	if err != nil {
-		t.Fatalf("%s", err)
-	}
-	res := &bor.ResponseWithHeight{}
-	if err := json.Unmarshal(spanData, res); err != nil {
-		t.Fatalf("%s", err)
-	}
-
-	heimdallSpan := &bor.HeimdallSpan{}
-	if err := json.Unmarshal(res.Result, heimdallSpan); err != nil {
-		t.Fatalf("%s", err)
-	}
-	return res, heimdallSpan
-}
diff --git a/consensus/bor_test/genesis.json b/consensus/bor/bor_test/genesis.json
similarity index 100%
rename from consensus/bor_test/genesis.json
rename to consensus/bor/bor_test/genesis.json
diff --git a/consensus/bor/bor_test/helper.go b/consensus/bor/bor_test/helper.go
new file mode 100644
index 000000000000..54ab949983a9
--- /dev/null
+++ b/consensus/bor/bor_test/helper.go
@@ -0,0 +1,132 @@
+package bortest
+
+import (
+	"encoding/hex"
+	"encoding/json"
+	"io/ioutil"
+	"math/big"
+	"testing"
+
+	"github.com/maticnetwork/bor/consensus/bor"
+	"github.com/maticnetwork/bor/core"
+	"github.com/maticnetwork/bor/core/state"
+	"github.com/maticnetwork/bor/core/types"
+	"github.com/maticnetwork/bor/crypto"
+	"github.com/maticnetwork/bor/crypto/secp256k1"
+	"github.com/maticnetwork/bor/eth"
+	"github.com/maticnetwork/bor/ethdb"
+	"github.com/maticnetwork/bor/node"
+)
+
+var (
+	extraSeal = 65 // Fixed number of extra-data suffix bytes reserved for signer seal
+	privKey   = "b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291"
+	key, _    = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
+	addr      = crypto.PubkeyToAddress(key.PublicKey) // 0x71562b71999873DB5b286dF957af199Ec94617F7
+)
+
+type initializeData struct {
+	genesis  *core.Genesis
+	ethereum *eth.Ethereum
+}
+
+func buildEthereumInstance(t *testing.T, db ethdb.Database) *initializeData {
+	genesisData, err := ioutil.ReadFile("genesis.json")
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+	gen := &core.Genesis{}
+	if err := json.Unmarshal(genesisData, gen); err != nil {
+		t.Fatalf("%s", err)
+	}
+	ethConf := &eth.Config{
+		Genesis: gen,
+	}
+	ethConf.Genesis.MustCommit(db)
+
+	// Create a temporary storage for the node keys and initialize it
+	workspace, err := ioutil.TempDir("", "console-tester-")
+	if err != nil {
+		t.Fatalf("failed to create temporary keystore: %v", err)
+	}
+
+	// Create a networkless protocol stack and start an Ethereum service within
+	stack, err := node.New(&node.Config{DataDir: workspace, UseLightweightKDF: true, Name: "console-tester"})
+	if err != nil {
+		t.Fatalf("failed to create node: %v", err)
+	}
+	err = stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
+		s, err := eth.New(ctx, ethConf)
+		return s, err
+	})
+	if err != nil {
+		t.Fatalf("failed to register Ethereum protocol: %v", err)
+	}
+
+	// Start the node and assemble the JavaScript console around it
+	if err = stack.Start(); err != nil {
+		t.Fatalf("failed to start test stack: %v", err)
+	}
+	_, err = stack.Attach()
+	if err != nil {
+		t.Fatalf("failed to attach to node: %v", err)
+	}
+
+	var ethereum *eth.Ethereum
+	stack.Service(&ethereum)
+	ethConf.Genesis.MustCommit(ethereum.ChainDb())
+	return &initializeData{
+		genesis:  gen,
+		ethereum: ethereum,
+	}
+}
+
+func insertNewBlock(t *testing.T, _bor *bor.Bor, chain *core.BlockChain, header *types.Header, statedb *state.StateDB, privKey []byte) {
+	_, err := _bor.FinalizeAndAssemble(chain, header, statedb, nil, nil, nil)
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+
+	sig, err := secp256k1.Sign(crypto.Keccak256(bor.BorRLP(header)), privKey)
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+	copy(header.Extra[len(header.Extra)-extraSeal:], sig)
+
+	block := types.NewBlockWithHeader(header)
+	if _, err := chain.InsertChain([]*types.Block{block}); err != nil {
+		t.Fatalf("%s", err)
+	}
+}
+
+func buildMinimalNextHeader(t *testing.T, block *types.Block, period uint64) *types.Header {
+	header := block.Header()
+	header.Number.Add(header.Number, big.NewInt(1))
+	header.ParentHash = block.Hash()
+	header.Time += (period + 1)
+	header.Extra = make([]byte, 97) // vanity (32) + extraSeal (65)
+	_key, _ := hex.DecodeString(privKey)
+	sig, err := secp256k1.Sign(crypto.Keccak256(bor.BorRLP(header)), _key)
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+	copy(header.Extra[len(header.Extra)-extraSeal:], sig)
+	return header
+}
+
+func loadSpanFromFile(t *testing.T) (*bor.ResponseWithHeight, *bor.HeimdallSpan) {
+	spanData, err := ioutil.ReadFile("span.json")
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+	res := &bor.ResponseWithHeight{}
+	if err := json.Unmarshal(spanData, res); err != nil {
+		t.Fatalf("%s", err)
+	}
+
+	heimdallSpan := &bor.HeimdallSpan{}
+	if err := json.Unmarshal(res.Result, heimdallSpan); err != nil {
+		t.Fatalf("%s", err)
+	}
+	return res, heimdallSpan
+}
diff --git a/consensus/bor_test/span.json b/consensus/bor/bor_test/span.json
similarity index 100%
rename from consensus/bor_test/span.json
rename to consensus/bor/bor_test/span.json
diff --git a/consensus/bor/rest.go b/consensus/bor/rest.go
index 6129037fc38d..9c525d6df6c5 100644
--- a/consensus/bor/rest.go
+++ b/consensus/bor/rest.go
@@ -25,18 +25,13 @@ type IHeimdallClient interface {
 }
 
 type HeimdallClient struct {
-	u      *url.URL
-	client http.Client
+	urlString string
+	client    http.Client
 }
 
 func NewHeimdallClient(urlString string) (*HeimdallClient, error) {
-	u, err := url.Parse(urlString)
-	if err != nil {
-		return nil, err
-	}
-
 	h := &HeimdallClient{
-		u: u,
+		urlString: urlString,
 		client: http.Client{
 			Timeout: time.Duration(5 * time.Second),
 		},
@@ -45,35 +40,46 @@ func NewHeimdallClient(urlString string) (*HeimdallClient, error) {
 }
 
 func (h *HeimdallClient) Fetch(paths ...string) (*ResponseWithHeight, error) {
+	u, err := url.Parse(h.urlString)
+	if err != nil {
+		return nil, err
+	}
+
 	for _, e := range paths {
 		if e != "" {
-			h.u.Path = path.Join(h.u.Path, e)
+			u.Path = path.Join(u.Path, e)
 		}
 	}
-	return h.internalFetch()
+
+	return h.internalFetch(u)
 }
 
 // FetchWithRetry returns data from heimdall with retry
 func (h *HeimdallClient) FetchWithRetry(paths ...string) (*ResponseWithHeight, error) {
+	u, err := url.Parse(h.urlString)
+	if err != nil {
+		return nil, err
+	}
+
 	for _, e := range paths {
 		if e != "" {
-			h.u.Path = path.Join(h.u.Path, e)
+			u.Path = path.Join(u.Path, e)
 		}
 	}
 
 	for {
-		res, err := h.internalFetch()
+		res, err := h.internalFetch(u)
 		if err == nil && res != nil {
 			return res, nil
 		}
-		log.Info("Retrying again in 5 seconds for next Heimdall span", "path", h.u.Path)
+		log.Info("Retrying again in 5 seconds for next Heimdall span", "path", u.Path)
 		time.Sleep(5 * time.Second)
 	}
 }
 
 // internal fetch method
-func (h *HeimdallClient) internalFetch() (*ResponseWithHeight, error) {
-	res, err := h.client.Get(h.u.String())
+func (h *HeimdallClient) internalFetch(u *url.URL) (*ResponseWithHeight, error) {
+	res, err := h.client.Get(u.String())
 	if err != nil {
 		return nil, err
 	}
diff --git a/core/blockchain.go b/core/blockchain.go
index 34bbd400efde..e90ffbb30eac 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -27,6 +27,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/hashicorp/golang-lru"
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/common/mclock"
 	"github.com/maticnetwork/bor/common/prque"
@@ -42,7 +43,6 @@ import (
 	"github.com/maticnetwork/bor/params"
 	"github.com/maticnetwork/bor/rlp"
 	"github.com/maticnetwork/bor/trie"
-	"github.com/hashicorp/golang-lru"
 )
 
 var (
@@ -142,6 +142,7 @@ type BlockChain struct {
 	chainHeadFeed event.Feed
 	logsFeed      event.Feed
 	blockProcFeed event.Feed
+	stateDataFeed event.Feed
 	scope         event.SubscriptionScope
 	genesisBlock  *types.Block
 
@@ -2177,6 +2178,11 @@ func (bc *BlockChain) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscript
 	return bc.scope.Track(bc.logsFeed.Subscribe(ch))
 }
 
+// SubscribeStateEvent registers a subscription of ChainSideEvent.
+func (bc *BlockChain) SubscribeStateEvent(ch chan<- NewStateChangeEvent) event.Subscription {
+	return bc.scope.Track(bc.stateDataFeed.Subscribe(ch))
+}
+
 // SubscribeBlockProcessingEvent registers a subscription of bool where true means
 // block processing has started while false means it has stopped.
 func (bc *BlockChain) SubscribeBlockProcessingEvent(ch chan<- bool) event.Subscription {
diff --git a/core/events.go b/core/events.go
index ba12738fa169..71a23100393b 100644
--- a/core/events.go
+++ b/core/events.go
@@ -41,6 +41,10 @@ type ChainEvent struct {
 	Logs  []*types.Log
 }
 
+type NewStateChangeEvent struct {
+	StateData *types.StateData
+}
+
 type ChainSideEvent struct {
 	Block *types.Block
 }
diff --git a/core/types/transaction.go b/core/types/transaction.go
index b19901c8ec2a..1481229b5ca2 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -60,6 +60,14 @@ type txdata struct {
 	Hash *common.Hash `json:"hash" rlp:"-"`
 }
 
+// State represents state received from Ethereum Blockchain
+type StateData struct {
+	Did      uint64
+	Contract common.Address
+	Data     string
+	TxHash   common.Hash
+}
+
 type txdataMarshaling struct {
 	AccountNonce hexutil.Uint64
 	Price        *hexutil.Big
diff --git a/eth/api_backend.go b/eth/api_backend.go
index dbb57207d6b7..ff03d1a91e05 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -24,6 +24,7 @@ import (
 	"github.com/maticnetwork/bor/accounts"
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/common/math"
+	"github.com/maticnetwork/bor/consensus/bor"
 	"github.com/maticnetwork/bor/core"
 	"github.com/maticnetwork/bor/core/bloombits"
 	"github.com/maticnetwork/bor/core/rawdb"
@@ -155,6 +156,11 @@ func (b *EthAPIBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) e
 	return b.eth.BlockChain().SubscribeChainSideEvent(ch)
 }
 
+func (b *EthAPIBackend) SubscribeStateEvent(ch chan<- core.NewStateChangeEvent) event.Subscription {
+	engine := b.eth.Engine()
+	return engine.(*bor.Bor).SubscribeStateEvent(ch)
+}
+
 func (b *EthAPIBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
 	return b.eth.BlockChain().SubscribeLogsEvent(ch)
 }
diff --git a/eth/backend.go b/eth/backend.go
index ac5b3ba9aa3c..edb253111f2b 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -231,6 +231,10 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 	return eth, nil
 }
 
+func (s *Ethereum) SetBlockchain(blockchain *core.BlockChain) {
+	s.blockchain = blockchain
+}
+
 func makeExtraData(extra []byte) []byte {
 	if len(extra) == 0 {
 		// create default extradata
diff --git a/eth/filters/api.go b/eth/filters/api.go
index addbece2aa51..d7d382d9e8a8 100644
--- a/eth/filters/api.go
+++ b/eth/filters/api.go
@@ -17,6 +17,7 @@
 package filters
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
@@ -215,7 +216,6 @@ func (api *PublicFilterAPI) NewHeads(ctx context.Context) (*rpc.Subscription, er
 	go func() {
 		headers := make(chan *types.Header)
 		headersSub := api.events.SubscribeNewHeads(headers)
-
 		for {
 			select {
 			case h := <-headers:
@@ -233,6 +233,38 @@ func (api *PublicFilterAPI) NewHeads(ctx context.Context) (*rpc.Subscription, er
 	return rpcSub, nil
 }
 
+// NewDeposits send a notification each time a new deposit received from bridge.
+func (api *PublicFilterAPI) NewDeposits(ctx context.Context, crit ethereum.FilterState) (*rpc.Subscription, error) {
+	notifier, supported := rpc.NotifierFromContext(ctx)
+	if !supported {
+		return &rpc.Subscription{}, rpc.ErrNotificationsUnsupported
+	}
+
+	rpcSub := notifier.CreateSubscription()
+	go func() {
+		stateData := make(chan *types.StateData)
+		stateDataSub := api.events.SubscribeNewDeposits(stateData)
+
+		for {
+			select {
+			case h := <-stateData:
+				if crit.Did == h.Did || bytes.Compare(crit.Contract.Bytes(), h.Contract.Bytes()) == 0 ||
+					(crit.Did == 0 && crit.Contract == common.Address{}) {
+					notifier.Notify(rpcSub.ID, h)
+				}
+			case <-rpcSub.Err():
+				stateDataSub.Unsubscribe()
+				return
+			case <-notifier.Closed():
+				stateDataSub.Unsubscribe()
+				return
+			}
+		}
+	}()
+
+	return rpcSub, nil
+}
+
 // Logs creates a subscription that fires for all new log that match the given filter criteria.
 func (api *PublicFilterAPI) Logs(ctx context.Context, crit FilterCriteria) (*rpc.Subscription, error) {
 	notifier, supported := rpc.NotifierFromContext(ctx)
diff --git a/eth/filters/filter.go b/eth/filters/filter.go
index a32a902bd0a5..547040eb3575 100644
--- a/eth/filters/filter.go
+++ b/eth/filters/filter.go
@@ -40,6 +40,7 @@ type Backend interface {
 
 	SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription
 	SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
+	SubscribeStateEvent(ch chan<- core.NewStateChangeEvent) event.Subscription
 	SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription
 	SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription
 
diff --git a/eth/filters/filter_system.go b/eth/filters/filter_system.go
index fd947eb0dce1..deff4faea078 100644
--- a/eth/filters/filter_system.go
+++ b/eth/filters/filter_system.go
@@ -53,6 +53,10 @@ const (
 	PendingTransactionsSubscription
 	// BlocksSubscription queries hashes for blocks that are imported
 	BlocksSubscription
+
+	//StateSubscription to listen main chain state
+	StateSubscription
+
 	// LastSubscription keeps track of the last index
 	LastIndexSubscription
 )
@@ -68,6 +72,8 @@ const (
 	logsChanSize = 10
 	// chainEvChanSize is the size of channel listening to ChainEvent.
 	chainEvChanSize = 10
+	// stateEvChanSize is the size of channel listening to ChainEvent.
+	stateEvChanSize = 10
 )
 
 var (
@@ -82,6 +88,7 @@ type subscription struct {
 	logs      chan []*types.Log
 	hashes    chan []common.Hash
 	headers   chan *types.Header
+	stateData chan *types.StateData
 	installed chan struct{} // closed when the filter is installed
 	err       chan error    // closed when the filter is uninstalled
 }
@@ -99,15 +106,18 @@ type EventSystem struct {
 	logsSub       event.Subscription         // Subscription for new log event
 	rmLogsSub     event.Subscription         // Subscription for removed log event
 	chainSub      event.Subscription         // Subscription for new chain event
+	stateSub      event.Subscription         // Subscription for new state change event
 	pendingLogSub *event.TypeMuxSubscription // Subscription for pending log event
 
 	// Channels
-	install   chan *subscription         // install filter for event notification
-	uninstall chan *subscription         // remove filter for event notification
-	txsCh     chan core.NewTxsEvent      // Channel to receive new transactions event
-	logsCh    chan []*types.Log          // Channel to receive new log event
-	rmLogsCh  chan core.RemovedLogsEvent // Channel to receive removed log event
-	chainCh   chan core.ChainEvent       // Channel to receive new chain event
+	install   chan *subscription            // install filter for event notification
+	uninstall chan *subscription            // remove filter for event notification
+	txsCh     chan core.NewTxsEvent         // Channel to receive new transactions event
+	logsCh    chan []*types.Log             // Channel to receive new log event
+	rmLogsCh  chan core.RemovedLogsEvent    // Channel to receive removed log event
+	chainCh   chan core.ChainEvent          // Channel to receive new chain event
+	stateCh   chan core.NewStateChangeEvent // Channel to receive deposit state change event
+
 }
 
 // NewEventSystem creates a new manager that listens for event on the given mux,
@@ -127,6 +137,7 @@ func NewEventSystem(mux *event.TypeMux, backend Backend, lightMode bool) *EventS
 		logsCh:    make(chan []*types.Log, logsChanSize),
 		rmLogsCh:  make(chan core.RemovedLogsEvent, rmLogsChanSize),
 		chainCh:   make(chan core.ChainEvent, chainEvChanSize),
+		stateCh:   make(chan core.NewStateChangeEvent, stateEvChanSize),
 	}
 
 	// Subscribe events
@@ -134,12 +145,13 @@ func NewEventSystem(mux *event.TypeMux, backend Backend, lightMode bool) *EventS
 	m.logsSub = m.backend.SubscribeLogsEvent(m.logsCh)
 	m.rmLogsSub = m.backend.SubscribeRemovedLogsEvent(m.rmLogsCh)
 	m.chainSub = m.backend.SubscribeChainEvent(m.chainCh)
+	m.stateSub = m.backend.SubscribeStateEvent(m.stateCh)
 	// TODO(rjl493456442): use feed to subscribe pending log event
 	m.pendingLogSub = m.mux.Subscribe(core.PendingLogsEvent{})
 
 	// Make sure none of the subscriptions are empty
 	if m.txsSub == nil || m.logsSub == nil || m.rmLogsSub == nil || m.chainSub == nil ||
-		m.pendingLogSub.Closed() {
+		m.stateSub == nil || m.pendingLogSub.Closed() {
 		log.Crit("Subscribe for event system failed")
 	}
 
@@ -292,6 +304,23 @@ func (es *EventSystem) SubscribeNewHeads(headers chan *types.Header) *Subscripti
 		logs:      make(chan []*types.Log),
 		hashes:    make(chan []common.Hash),
 		headers:   headers,
+		stateData: make(chan *types.StateData),
+		installed: make(chan struct{}),
+		err:       make(chan error),
+	}
+	return es.subscribe(sub)
+}
+
+// SubscribeNewDeposits creates a subscription that writes details about the new state sync events (from mainchain to Bor)
+func (es *EventSystem) SubscribeNewDeposits(stateData chan *types.StateData) *Subscription {
+	sub := &subscription{
+		id:        rpc.NewID(),
+		typ:       StateSubscription,
+		created:   time.Now(),
+		logs:      make(chan []*types.Log),
+		hashes:    make(chan []common.Hash),
+		headers:   make(chan *types.Header),
+		stateData: stateData,
 		installed: make(chan struct{}),
 		err:       make(chan error),
 	}
@@ -355,6 +384,10 @@ func (es *EventSystem) broadcast(filters filterIndex, ev interface{}) {
 		for _, f := range filters[PendingTransactionsSubscription] {
 			f.hashes <- hashes
 		}
+	case core.NewStateChangeEvent:
+		for _, f := range filters[StateSubscription] {
+			f.stateData <- e.StateData
+		}
 	case core.ChainEvent:
 		for _, f := range filters[BlocksSubscription] {
 			f.headers <- e.Block.Header()
@@ -471,6 +504,8 @@ func (es *EventSystem) eventLoop() {
 			es.broadcast(index, ev)
 		case ev := <-es.chainCh:
 			es.broadcast(index, ev)
+		case ev := <-es.stateCh:
+			es.broadcast(index, ev)
 		case ev, active := <-es.pendingLogSub.Chan():
 			if !active { // system stopped
 				return
diff --git a/ethclient/ethclient.go b/ethclient/ethclient.go
index ad8acaafa2d6..5d349a289b86 100644
--- a/ethclient/ethclient.go
+++ b/ethclient/ethclient.go
@@ -24,7 +24,7 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/maticnetwork/bor"
+	ethereum "github.com/maticnetwork/bor"
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/common/hexutil"
 	"github.com/maticnetwork/bor/core/types"
@@ -324,6 +324,11 @@ func (ec *Client) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header)
 	return ec.c.EthSubscribe(ctx, ch, "newHeads")
 }
 
+// SubscribeNewDeposit subscribes to new state sync events
+func (ec *Client) SubscribeNewDeposit(ctx context.Context, ch chan<- *types.StateData) (ethereum.Subscription, error) {
+	return ec.c.EthSubscribe(ctx, ch, "newDeposits", nil)
+}
+
 // State Access
 
 // NetworkID returns the network ID (also known as the chain ID) for this chain.
diff --git a/ethclient/ethclient_test.go b/ethclient/ethclient_test.go
index c9364e2d8c43..504a77a9706a 100644
--- a/ethclient/ethclient_test.go
+++ b/ethclient/ethclient_test.go
@@ -25,7 +25,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/maticnetwork/bor"
+	bor "github.com/maticnetwork/bor"
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/consensus/ethash"
 	"github.com/maticnetwork/bor/core"
@@ -39,17 +39,17 @@ import (
 
 // Verify that Client implements the ethereum interfaces.
 var (
-	_ = ethereum.ChainReader(&Client{})
-	_ = ethereum.TransactionReader(&Client{})
-	_ = ethereum.ChainStateReader(&Client{})
-	_ = ethereum.ChainSyncReader(&Client{})
-	_ = ethereum.ContractCaller(&Client{})
-	_ = ethereum.GasEstimator(&Client{})
-	_ = ethereum.GasPricer(&Client{})
-	_ = ethereum.LogFilterer(&Client{})
-	_ = ethereum.PendingStateReader(&Client{})
-	// _ = ethereum.PendingStateEventer(&Client{})
-	_ = ethereum.PendingContractCaller(&Client{})
+	_ = bor.ChainReader(&Client{})
+	_ = bor.TransactionReader(&Client{})
+	_ = bor.ChainStateReader(&Client{})
+	_ = bor.ChainSyncReader(&Client{})
+	_ = bor.ContractCaller(&Client{})
+	_ = bor.GasEstimator(&Client{})
+	_ = bor.GasPricer(&Client{})
+	_ = bor.LogFilterer(&Client{})
+	_ = bor.PendingStateReader(&Client{})
+	// _ = bor.PendingStateEventer(&Client{})
+	_ = bor.PendingContractCaller(&Client{})
 )
 
 func TestToFilterArg(t *testing.T) {
@@ -63,13 +63,13 @@ func TestToFilterArg(t *testing.T) {
 
 	for _, testCase := range []struct {
 		name   string
-		input  ethereum.FilterQuery
+		input  bor.FilterQuery
 		output interface{}
 		err    error
 	}{
 		{
 			"without BlockHash",
-			ethereum.FilterQuery{
+			bor.FilterQuery{
 				Addresses: addresses,
 				FromBlock: big.NewInt(1),
 				ToBlock:   big.NewInt(2),
@@ -85,7 +85,7 @@ func TestToFilterArg(t *testing.T) {
 		},
 		{
 			"with nil fromBlock and nil toBlock",
-			ethereum.FilterQuery{
+			bor.FilterQuery{
 				Addresses: addresses,
 				Topics:    [][]common.Hash{},
 			},
@@ -99,7 +99,7 @@ func TestToFilterArg(t *testing.T) {
 		},
 		{
 			"with blockhash",
-			ethereum.FilterQuery{
+			bor.FilterQuery{
 				Addresses: addresses,
 				BlockHash: &blockHash,
 				Topics:    [][]common.Hash{},
@@ -113,7 +113,7 @@ func TestToFilterArg(t *testing.T) {
 		},
 		{
 			"with blockhash and from block",
-			ethereum.FilterQuery{
+			bor.FilterQuery{
 				Addresses: addresses,
 				BlockHash: &blockHash,
 				FromBlock: big.NewInt(1),
@@ -124,7 +124,7 @@ func TestToFilterArg(t *testing.T) {
 		},
 		{
 			"with blockhash and to block",
-			ethereum.FilterQuery{
+			bor.FilterQuery{
 				Addresses: addresses,
 				BlockHash: &blockHash,
 				ToBlock:   big.NewInt(1),
@@ -135,7 +135,7 @@ func TestToFilterArg(t *testing.T) {
 		},
 		{
 			"with blockhash and both from / to block",
-			ethereum.FilterQuery{
+			bor.FilterQuery{
 				Addresses: addresses,
 				BlockHash: &blockHash,
 				FromBlock: big.NewInt(1),
diff --git a/go.mod b/go.mod
index b9b765a52cea..ca433a71c6e8 100644
--- a/go.mod
+++ b/go.mod
@@ -3,11 +3,12 @@ module github.com/maticnetwork/bor
 go 1.13
 
 require (
-	github.com/Azure/azure-pipeline-go v0.0.0-20180607212504-7571e8eb0876 // indirect
-	github.com/Azure/azure-storage-blob-go v0.0.0-20180712005634-eaae161d9d5e
+	github.com/Azure/azure-pipeline-go v0.2.2 // indirect
+	github.com/Azure/azure-storage-blob-go v0.7.0
+	github.com/Azure/go-autorest/autorest/adal v0.8.0 // indirect
 	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
 	github.com/allegro/bigcache v1.2.1-0.20190218064605-e24eb225f156
-	github.com/apilayer/freegeoip v3.5.1-0.20180702111401-3f942d1392f6+incompatible
+	github.com/apilayer/freegeoip v3.5.0+incompatible
 	github.com/aristanetworks/goarista v0.0.0-20170210015632-ea17b1a17847
 	github.com/btcsuite/btcd v0.0.0-20171128150713-2e60448ffcc6
 	github.com/cespare/cp v0.1.0
@@ -21,49 +22,52 @@ require (
 	github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff
 	github.com/go-ole/go-ole v1.2.1 // indirect
 	github.com/go-stack/stack v1.8.0
-	github.com/golang/protobuf v1.3.2-0.20190517061210-b285ee9cfc6c
+	github.com/golang/protobuf v1.3.5
 	github.com/golang/snappy v0.0.1
-	github.com/google/go-cmp v0.4.0 // indirect
-	github.com/graph-gophers/graphql-go v0.0.0-20200309224638-dae41bde9ef9
+	github.com/google/go-cmp v0.3.1 // indirect
+	github.com/graph-gophers/graphql-go v0.0.0-20191115155744-f33e81362277
 	github.com/hashicorp/golang-lru v0.0.0-20160813221303-0a025b7e63ad
-	github.com/howeyc/fsnotify v0.9.1-0.20151003194602-f0c08ee9c607 // indirect
+	github.com/howeyc/fsnotify v0.9.0 // indirect
 	github.com/huin/goupnp v0.0.0-20161224104101-679507af18f3
 	github.com/influxdata/influxdb v1.2.3-0.20180221223340-01288bdb0883
 	github.com/jackpal/go-nat-pmp v1.0.2-0.20160603034137-1fa385a6f458
 	github.com/julienschmidt/httprouter v1.1.1-0.20170430222011-975b5c4c7c21
-	github.com/karalabe/usb v0.0.0-20191104083709-911d15fe12a9
+	github.com/karalabe/usb v0.0.0-20190919080040-51dc0efba356
+	github.com/kr/pretty v0.1.0 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.0
 	github.com/mattn/go-isatty v0.0.5-0.20180830101745-3fb116b82035
+	github.com/mattn/go-runewidth v0.0.4 // indirect
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
 	github.com/naoina/go-stringutil v0.1.0 // indirect
 	github.com/naoina/toml v0.1.2-0.20170918210437-9fafd6967416
 	github.com/olekukonko/tablewriter v0.0.2-0.20190409134802-7e037d187b0c
-	github.com/oschwald/maxminddb-golang v1.3.1-0.20180819230143-277d39ecb83e // indirect
+	github.com/onsi/ginkgo v1.10.3 // indirect
+	github.com/onsi/gomega v1.7.1 // indirect
+	github.com/oschwald/maxminddb-golang v1.6.0 // indirect
 	github.com/pborman/uuid v0.0.0-20170112150404-1b00554d8222
 	github.com/peterh/liner v1.1.1-0.20190123174540-a2c9a5303de7
-	github.com/pkg/errors v0.8.1-0.20171216070316-e881fd58d78e // indirect
+	github.com/pkg/errors v0.8.1 // indirect
 	github.com/prometheus/tsdb v0.6.2-0.20190402121629-4f204dcbc150
 	github.com/rjeczalik/notify v0.9.1
-	github.com/robertkrimen/otto v0.0.0-20170205013659-6a77b7cbc37d
+	github.com/robertkrimen/otto v0.0.0-20191219234010-c382bd3c16ff
 	github.com/rs/cors v0.0.0-20160617231935-a62a804a8a00
 	github.com/rs/xhandler v0.0.0-20160618193221-ed27b6fd6521 // indirect
 	github.com/status-im/keycard-go v0.0.0-20190316090335-8537d3370df4
 	github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570
 	github.com/steakknife/hamming v0.0.0-20180906055917-c99c65617cd3 // indirect
-	github.com/stretchr/objx v0.2.0 // indirect
-	github.com/stretchr/testify v1.3.0
-	github.com/syndtr/goleveldb v1.0.1-0.20190318030020-c3a204f8e965
+	github.com/stretchr/testify v1.4.0
+	github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d
 	github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef
 	github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208
-	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
-	golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3
-	golang.org/x/sync v0.0.0-20181108010431-42b317875d0f
-	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
-	golang.org/x/text v0.3.1-0.20190405145017-31e7599a6c37
-	gopkg.in/check.v1 v1.0.0-20161208181325-20d25e280405
+	golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4
+	golang.org/x/net v0.0.0-20200301022130-244492dfa37a
+	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
+	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
+	golang.org/x/text v0.3.2
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
 	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce
-	gopkg.in/olebedev/go-duktape.v3 v3.0.0-20190213234257-ec84240a7772
+	gopkg.in/olebedev/go-duktape.v3 v3.0.0-20200316214253-d7b0ff38cac9
 	gopkg.in/sourcemap.v1 v1.0.5 // indirect
 	gopkg.in/urfave/cli.v1 v1.20.0
 	gotest.tools v2.2.0+incompatible // indirect
diff --git a/go.sum b/go.sum
index c946c411bc40..c51ed2d8e957 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,24 @@
-github.com/Azure/azure-pipeline-go v0.0.0-20180607212504-7571e8eb0876 h1:3c3mGlhASTJh6H6Ba9EHv2FDSmEUyJuJHR6UD7b+YuE=
-github.com/Azure/azure-pipeline-go v0.0.0-20180607212504-7571e8eb0876/go.mod h1:XA1kFWRVhSK+KNFiOhfv83Fv8L9achrP7OxIzeTn1Yg=
-github.com/Azure/azure-storage-blob-go v0.0.0-20180712005634-eaae161d9d5e h1:Ix5oKbq0MlolI+T4EPCL9sddfEw6LgRMpC+qx0Kz5/E=
-github.com/Azure/azure-storage-blob-go v0.0.0-20180712005634-eaae161d9d5e/go.mod h1:x2mtS6O3mnMEZOJp7d7oldh8IvatBrMfReiyQ+cKgKY=
+github.com/Azure/azure-pipeline-go v0.2.1/go.mod h1:UGSo8XybXnIGZ3epmeBw7Jdz+HiUVpqIlpz/HKHylF4=
+github.com/Azure/azure-pipeline-go v0.2.2 h1:6oiIS9yaG6XCCzhgAgKFfIWyo4LLCiDhZot6ltoThhY=
+github.com/Azure/azure-pipeline-go v0.2.2/go.mod h1:4rQ/NZncSvGqNkkOsNpOU1tgoNuIlp9AfUH5G1tvCHc=
+github.com/Azure/azure-storage-blob-go v0.7.0 h1:MuueVOYkufCxJw5YZzF842DY2MBsp+hLuh2apKY0mck=
+github.com/Azure/azure-storage-blob-go v0.7.0/go.mod h1:f9YQKtsG1nMisotuTPpO0tjNuEjKRYAcJU8/ydDI++4=
+github.com/Azure/go-autorest/autorest v0.9.0 h1:MRvx8gncNaXJqOoLmhNjUAKh33JJF8LyxPhomEtOsjs=
+github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
+github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
+github.com/Azure/go-autorest/autorest/adal v0.8.0 h1:CxTzQrySOxDnKpLjFJeZAS5Qrv/qFPkgLjx5bOAi//I=
+github.com/Azure/go-autorest/autorest/adal v0.8.0/go.mod h1:Z6vX6WXXuyieHAXwMj0S6HY6e6wcHn37qQMBQlvY3lc=
+github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
+github.com/Azure/go-autorest/autorest/date v0.2.0 h1:yW+Zlqf26583pE43KhfnhFcdmSWlm5Ew6bxipnr/tbM=
+github.com/Azure/go-autorest/autorest/date v0.2.0/go.mod h1:vcORJHLJEh643/Ioh9+vPmf1Ij9AEBM5FuBIXLmIy0g=
+github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/mocks v0.3.0 h1:qJumjCaCudz+OcqE9/XtEPfvtOjOmKaui4EOpFI6zZc=
+github.com/Azure/go-autorest/autorest/mocks v0.3.0/go.mod h1:a8FDP3DYzQ4RYfVAxAN3SVSiiO77gL2j2ronKKP0syM=
+github.com/Azure/go-autorest/logger v0.1.0 h1:ruG4BSDXONFRrZZJ2GUXDiUyVpayPmb1GnWeHDdaNKY=
+github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
+github.com/Azure/go-autorest/tracing v0.5.0 h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=
+github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 h1:fLjPD/aNc3UIOA6tDi6QXUemppXK3P9BI7mr2hd6gx8=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
@@ -9,8 +26,8 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/allegro/bigcache v1.2.1-0.20190218064605-e24eb225f156 h1:eMwmnE/GDgah4HI848JfFxHt+iPb26b4zyfspmqY0/8=
 github.com/allegro/bigcache v1.2.1-0.20190218064605-e24eb225f156/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2ucNfQESPXM=
-github.com/apilayer/freegeoip v3.5.1-0.20180702111401-3f942d1392f6+incompatible h1:Zwy9nfhT7doqRUFGg9Qj+mgsXu8509CBKWO6t9IjfQs=
-github.com/apilayer/freegeoip v3.5.1-0.20180702111401-3f942d1392f6+incompatible/go.mod h1:CUfFqErhFhXneJendyQ/rRcuA8kH8JxHvYnbOozmlCU=
+github.com/apilayer/freegeoip v3.5.0+incompatible h1:z1u2gv0/rsSi/HqMDB436AiUROXXim7st5DOg4Ikl4A=
+github.com/apilayer/freegeoip v3.5.0+incompatible/go.mod h1:CUfFqErhFhXneJendyQ/rRcuA8kH8JxHvYnbOozmlCU=
 github.com/aristanetworks/goarista v0.0.0-20170210015632-ea17b1a17847 h1:rtI0fD4oG/8eVokGVPYJEW1F88p1ZNgXiEIs9thEE4A=
 github.com/aristanetworks/goarista v0.0.0-20170210015632-ea17b1a17847/go.mod h1:D/tb0zPVXnP7fmsLZjtdUhSsumbK/ij54UXjjVgMGxQ=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
@@ -18,12 +35,15 @@ github.com/btcsuite/btcd v0.0.0-20171128150713-2e60448ffcc6 h1:Eey/GGQ/E5Xp1P2Ly
 github.com/btcsuite/btcd v0.0.0-20171128150713-2e60448ffcc6/go.mod h1:Dmm/EzmjnCiweXmzRIAiUWCInVmPgjkzgv5k4tVyXiQ=
 github.com/cespare/cp v0.1.0 h1:SE+dxFebS7Iik5LK0tsi1k9ZCxEaFX4AjQmoyA+1dJk=
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@@ -49,18 +69,18 @@ github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
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@@ -71,18 +91,27 @@ github.com/jackpal/go-nat-pmp v1.0.2-0.20160603034137-1fa385a6f458 h1:6OvNmYgJye
 github.com/jackpal/go-nat-pmp v1.0.2-0.20160603034137-1fa385a6f458/go.mod h1:QPH045xvCAeXUZOxsnwmrtiCoxIr9eob+4orBN1SBKc=
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 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
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@@ -96,19 +125,23 @@ github.com/olekukonko/tablewriter v0.0.2-0.20190409134802-7e037d187b0c/go.mod h1
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@@ -119,8 +152,8 @@ github.com/prometheus/tsdb v0.6.2-0.20190402121629-4f204dcbc150 h1:ZeU+auZj1iNzN
 github.com/prometheus/tsdb v0.6.2-0.20190402121629-4f204dcbc150/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
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@@ -132,54 +165,62 @@ github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570 h1:gIlAHnH1
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 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=
-github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
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 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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 github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef h1:wHSqTBrZW24CsNJDfeh9Ex6Pm0Rcpc7qrgKBiL44vF4=
 github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef/go.mod h1:sJ5fKU0s6JVwZjjcUEX2zFOnvq0ASQ2K9Zr6cf67kNs=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 h1:1cngl9mPEoITZG8s8cVcUy5CeIBYhEESkOB7m6Gmkrk=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208/go.mod h1:IotVbo4F+mw0EzQ08zFqg7pK3FebNXpaMsRy2RT+Ees=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4 h1:QmwruyY+bKbDDL0BaglrbZABEali68eoMFhTZpCjYVA=
+golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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+golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f h1:Bl/8QSvNqXvPGPGXa2z5xUTmV7VDcZyvRZ+QQXkXTZQ=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.1-0.20190405145017-31e7599a6c37 h1:GyWqpHjbqJPzmv9GUT0BJbxVkiMfYpHH+D/1FkwOlWA=
-golang.org/x/text v0.3.1-0.20190405145017-31e7599a6c37/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20161208181325-20d25e280405 h1:829vOVxxusYHC+IqBtkX5mbKtsY9fheQiQn0MZRVLfQ=
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 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce h1:+JknDZhAj8YMt7GC73Ei8pv4MzjDUNPHgQWJdtMAaDU=
 gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce/go.mod h1:5AcXVHNjg+BDxry382+8OKon8SEWiKktQR07RKPsv1c=
-gopkg.in/olebedev/go-duktape.v3 v3.0.0-20190213234257-ec84240a7772 h1:hhsSf/5z74Ck/DJYc+R8zpq8KGm7uJvpdLRQED/IedA=
-gopkg.in/olebedev/go-duktape.v3 v3.0.0-20190213234257-ec84240a7772/go.mod h1:uAJfkITjFhyEEuUfm7bsmCZRbW5WRq8s9EY8HZ6hCns=
+gopkg.in/olebedev/go-duktape.v3 v3.0.0-20200316214253-d7b0ff38cac9 h1:ITeyKbRetrVzqR3U1eY+ywgp7IBspGd1U/bkwd1gWu4=
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 gopkg.in/sourcemap.v1 v1.0.5 h1:inv58fC9f9J3TK2Y2R1NPntXEn3/wjWHkonhIUODNTI=
 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 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+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 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
diff --git a/interfaces.go b/interfaces.go
index 3aaed80b8807..4c8ce56d9dfb 100644
--- a/interfaces.go
+++ b/interfaces.go
@@ -150,6 +150,11 @@ type FilterQuery struct {
 	Topics [][]common.Hash
 }
 
+type FilterState struct {
+	Did      uint64
+	Contract common.Address
+}
+
 // LogFilterer provides access to contract log events using a one-off query or continuous
 // event subscription.
 //
diff --git a/internal/build/archive.go b/internal/build/archive.go
index ac680ba63de8..a00258d99903 100644
--- a/internal/build/archive.go
+++ b/internal/build/archive.go
@@ -183,3 +183,48 @@ func (a *TarballArchive) Close() error {
 	}
 	return a.file.Close()
 }
+
+func ExtractTarballArchive(archive string, dest string) error {
+	// We're only interested in gzipped archives, wrap the reader now
+	ar, err := os.Open(archive)
+	if err != nil {
+		return err
+	}
+	defer ar.Close()
+
+	gzr, err := gzip.NewReader(ar)
+	if err != nil {
+		return err
+	}
+	defer gzr.Close()
+
+	// Iterate over all the files in the tarball
+	tr := tar.NewReader(gzr)
+	for {
+		// Fetch the next tarball header and abort if needed
+		header, err := tr.Next()
+		if err != nil {
+			if err == io.EOF {
+				return nil
+			}
+			return err
+		}
+		// Figure out the target and create it
+		target := filepath.Join(dest, header.Name)
+
+		switch header.Typeflag {
+		case tar.TypeReg:
+			if err := os.MkdirAll(filepath.Dir(target), 0755); err != nil {
+				return err
+			}
+			file, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
+			if err != nil {
+				return err
+			}
+			if _, err := io.Copy(file, tr); err != nil {
+				return err
+			}
+			file.Close()
+		}
+	}
+}
diff --git a/internal/build/azure.go b/internal/build/azure.go
index 086dff2c4a8a..786284265082 100644
--- a/internal/build/azure.go
+++ b/internal/build/azure.go
@@ -22,7 +22,7 @@ import (
 	"net/url"
 	"os"
 
-	"github.com/Azure/azure-storage-blob-go/2018-03-28/azblob"
+	"github.com/Azure/azure-storage-blob-go/azblob"
 )
 
 // AzureBlobstoreConfig is an authentication and configuration struct containing
@@ -45,7 +45,11 @@ func AzureBlobstoreUpload(path string, name string, config AzureBlobstoreConfig)
 		return nil
 	}
 	// Create an authenticated client against the Azure cloud
-	credential := azblob.NewSharedKeyCredential(config.Account, config.Token)
+	credential, err := azblob.NewSharedKeyCredential(config.Account, config.Token)
+	if err != nil {
+		return err
+	}
+
 	pipeline := azblob.NewPipeline(credential, azblob.PipelineOptions{})
 
 	u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", config.Account))
@@ -67,7 +71,11 @@ func AzureBlobstoreUpload(path string, name string, config AzureBlobstoreConfig)
 
 // AzureBlobstoreList lists all the files contained within an azure blobstore.
 func AzureBlobstoreList(config AzureBlobstoreConfig) ([]azblob.BlobItem, error) {
-	credential := azblob.NewSharedKeyCredential(config.Account, config.Token)
+	credential, err := azblob.NewSharedKeyCredential(config.Account, config.Token)
+	if err != nil {
+		return nil, err
+	}
+
 	pipeline := azblob.NewPipeline(credential, azblob.PipelineOptions{})
 
 	u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", config.Account))
@@ -95,7 +103,11 @@ func AzureBlobstoreDelete(config AzureBlobstoreConfig, blobs []azblob.BlobItem)
 		return nil
 	}
 	// Create an authenticated client against the Azure cloud
-	credential := azblob.NewSharedKeyCredential(config.Account, config.Token)
+	credential, err := azblob.NewSharedKeyCredential(config.Account, config.Token)
+	if err != nil {
+		return err
+	}
+
 	pipeline := azblob.NewPipeline(credential, azblob.PipelineOptions{})
 
 	u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", config.Account))
diff --git a/internal/build/download.go b/internal/build/download.go
new file mode 100644
index 000000000000..0ed0b5e130d1
--- /dev/null
+++ b/internal/build/download.go
@@ -0,0 +1,151 @@
+// 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 build
+
+import (
+	"bufio"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// ChecksumDB keeps file checksums.
+type ChecksumDB struct {
+	allChecksums []string
+}
+
+// MustLoadChecksums loads a file containing checksums.
+func MustLoadChecksums(file string) *ChecksumDB {
+	content, err := ioutil.ReadFile(file)
+	if err != nil {
+		log.Fatal("can't load checksum file: " + err.Error())
+	}
+	return &ChecksumDB{strings.Split(string(content), "\n")}
+}
+
+// Verify checks whether the given file is valid according to the checksum database.
+func (db *ChecksumDB) Verify(path string) error {
+	fd, err := os.Open(path)
+	if err != nil {
+		return err
+	}
+	defer fd.Close()
+
+	h := sha256.New()
+	if _, err := io.Copy(h, bufio.NewReader(fd)); err != nil {
+		return err
+	}
+	fileHash := hex.EncodeToString(h.Sum(nil))
+	if !db.findHash(filepath.Base(path), fileHash) {
+		return fmt.Errorf("invalid file hash %s", fileHash)
+	}
+	return nil
+}
+
+func (db *ChecksumDB) findHash(basename, hash string) bool {
+	want := hash + "  " + basename
+	for _, line := range db.allChecksums {
+		if strings.TrimSpace(line) == want {
+			return true
+		}
+	}
+	return false
+}
+
+// DownloadFile downloads a file and verifies its checksum.
+func (db *ChecksumDB) DownloadFile(url, dstPath string) error {
+	if err := db.Verify(dstPath); err == nil {
+		fmt.Printf("%s is up-to-date\n", dstPath)
+		return nil
+	}
+	fmt.Printf("%s is stale\n", dstPath)
+	fmt.Printf("downloading from %s\n", url)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return fmt.Errorf("download error: %v", err)
+	} else if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("download error: status %d", resp.StatusCode)
+	}
+	defer resp.Body.Close()
+	if err := os.MkdirAll(filepath.Dir(dstPath), 0755); err != nil {
+		return err
+	}
+	fd, err := os.OpenFile(dstPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+	dst := newDownloadWriter(fd, resp.ContentLength)
+	_, err = io.Copy(dst, resp.Body)
+	dst.Close()
+	if err != nil {
+		return err
+	}
+
+	return db.Verify(dstPath)
+}
+
+type downloadWriter struct {
+	file    *os.File
+	dstBuf  *bufio.Writer
+	size    int64
+	written int64
+	lastpct int64
+}
+
+func newDownloadWriter(dst *os.File, size int64) *downloadWriter {
+	return &downloadWriter{
+		file:   dst,
+		dstBuf: bufio.NewWriter(dst),
+		size:   size,
+	}
+}
+
+func (w *downloadWriter) Write(buf []byte) (int, error) {
+	n, err := w.dstBuf.Write(buf)
+
+	// Report progress.
+	w.written += int64(n)
+	pct := w.written * 10 / w.size * 10
+	if pct != w.lastpct {
+		if w.lastpct != 0 {
+			fmt.Print("...")
+		}
+		fmt.Print(pct, "%")
+		w.lastpct = pct
+	}
+	return n, err
+}
+
+func (w *downloadWriter) Close() error {
+	if w.lastpct > 0 {
+		fmt.Println() // Finish the progress line.
+	}
+	flushErr := w.dstBuf.Flush()
+	closeErr := w.file.Close()
+	if flushErr != nil {
+		return flushErr
+	}
+	return closeErr
+}
diff --git a/internal/ethapi/backend.go b/internal/ethapi/backend.go
index 986912b16386..e0deeab81fdb 100644
--- a/internal/ethapi/backend.go
+++ b/internal/ethapi/backend.go
@@ -59,6 +59,7 @@ type Backend interface {
 	GetTd(blockHash common.Hash) *big.Int
 	GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error)
 	SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
+	SubscribeStateEvent(ch chan<- core.NewStateChangeEvent) event.Subscription
 	SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
 	SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription
 
diff --git a/les/api_backend.go b/les/api_backend.go
index 8333fdd8c37f..5c8ec82d8812 100644
--- a/les/api_backend.go
+++ b/les/api_backend.go
@@ -24,6 +24,7 @@ import (
 	"github.com/maticnetwork/bor/accounts"
 	"github.com/maticnetwork/bor/common"
 	"github.com/maticnetwork/bor/common/math"
+	"github.com/maticnetwork/bor/consensus/bor"
 	"github.com/maticnetwork/bor/core"
 	"github.com/maticnetwork/bor/core/bloombits"
 	"github.com/maticnetwork/bor/core/rawdb"
@@ -164,6 +165,11 @@ func (b *LesApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) e
 	return b.eth.blockchain.SubscribeChainSideEvent(ch)
 }
 
+func (b *LesApiBackend) SubscribeStateEvent(ch chan<- core.NewStateChangeEvent) event.Subscription {
+	engine := b.eth.Engine()
+	return engine.(*bor.Bor).SubscribeStateEvent(ch)
+}
+
 func (b *LesApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
 	return b.eth.blockchain.SubscribeLogsEvent(ch)
 }
diff --git a/les/backend.go b/les/backend.go
index 4481bd676ebf..fc995dd58fc4 100644
--- a/les/backend.go
+++ b/les/backend.go
@@ -28,6 +28,7 @@ import (
 	"github.com/maticnetwork/bor/common/hexutil"
 	"github.com/maticnetwork/bor/common/mclock"
 	"github.com/maticnetwork/bor/consensus"
+	"github.com/maticnetwork/bor/consensus/bor"
 	"github.com/maticnetwork/bor/core"
 	"github.com/maticnetwork/bor/core/bloombits"
 	"github.com/maticnetwork/bor/core/rawdb"
@@ -59,6 +60,7 @@ type LightEthereum struct {
 	peers      *peerSet
 	txPool     *light.TxPool
 	blockchain *light.LightChain
+	bor        *bor.Bor
 	serverPool *serverPool
 	reqDist    *requestDistributor
 	retriever  *retrieveManager