chore: add local sequencer and docker file

.gitignore

@@ -0,0 +1 @@
+build/

Dockerfile

@@ -0,0 +1,21 @@
+FROM --platform=$BUILDPLATFORM golang:1.23-alpine AS build-env
+
+# Set working directory for the build
+WORKDIR /src
+
+COPY . .
+
+RUN go mod tidy -compat=1.19 && \
+    go build /src/cmd/local-sequencer/main.go
+
+# Final image
+FROM alpine:3.18.3
+
+WORKDIR /root
+
+# Copy over binaries from the build-env
+COPY --from=build-env /src/main /usr/bin/local-sequencer
+
+EXPOSE 7980
+
+CMD ["local-sequencer", "-listen-all"]

Makefile

@@ -1,3 +1,4 @@
+LDFLAGS=-ldflags="-X '$(versioningPath).buildTime=$(shell date)' -X '$(versioningPath).lastCommit=$(shell git rev-parse HEAD)' -X '$(versioningPath).semanticVersion=$(shell git describe --tags --dirty=-dev 2>/dev/null || git rev-parse --abbrev-ref HEAD)'"
 DOCKER := $(shell which docker)
 DOCKER_BUF := $(DOCKER) run --rm -v $(CURDIR):/workspace --workdir /workspace bufbuild/buf
 
@@ -7,6 +8,12 @@ pkgs := $(shell go list ./...)
 run := .
 count := 1
 
+## build: Build local-da binary.
+build:
+	@echo "--> Building local-sequencer"
+	@go build -o build/ ${LDFLAGS} ./...
+.PHONY: build
+
 ## help: Show this help message
 help: Makefile
 	@echo " Choose a command run in "$(PROJECTNAME)":"
@@ -40,6 +47,7 @@ lint: vet
 	@golangci-lint run
 	@echo "--> Running markdownlint"
 	@markdownlint --config .markdownlint.yaml '**/*.md'
+	@hadolint Dockerfile
 	@echo "--> Running yamllint"
 	@yamllint --no-warnings . -c .yamllint.yml
 

cmd/local-sequencer/main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/rollkit/go-sequencing/proxy/grpc"
+	"github.com/rollkit/go-sequencing/test"
+)
+
+const (
+	defaultHost     = "localhost"
+	defaultPort     = "50051"
+	defaultRollupId = "rollup-id"
+)
+
+func main() {
+	var (
+		host      string
+		port      string
+		rollupId  string
+		listenAll bool
+	)
+	flag.StringVar(&port, "port", defaultPort, "listening port")
+	flag.StringVar(&host, "host", defaultHost, "listening address")
+	flag.StringVar(&rollupId, "rollup-id", defaultRollupId, "rollup id")
+	flag.BoolVar(&listenAll, "listen-all", false, "listen on all network interfaces (0.0.0.0) instead of just localhost")
+	flag.Parse()
+
+	if listenAll {
+		host = "0.0.0.0"
+	}
+
+	d := test.NewDummySequencer([]byte(rollupId))
+	srv := grpc.NewServer(d, d, d)
+	log.Printf("Listening on: %s:%s", host, port)
+
+	listenAddress := fmt.Sprintf("%s:%s", host, port)
+	lis, err := net.Listen("tcp", listenAddress)
+	if err != nil {
+		log.Fatal("error while serving:", err)
+	}
+	go func() {
+		_ = srv.Serve(lis)
+	}()
+
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt, syscall.SIGINT)
+	<-interrupt
+	fmt.Println("\nCtrl+C pressed. Exiting...")
+	os.Exit(0)
+}