Merge pull request #6 from ethereum-optimism/merge-op-ufm-2

feat: move op-ufm to this repo
2024-06-11 14:32:02 -07:00 · 2024-06-11 14:32:02 -07:00 · 0ab029a12d
commit 0ab029a12d
parent 64d4b1eacf 38b6f1b043
25 changed files with 2168 additions and 1 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@ -16,6 +16,7 @@ workflows:
          # <regex path-to-test> <parameter-to-set> <value-of-pipeline-parameter>
          mapping: |
            op-conductor-mon/.* run-build-op-conductor-mon true
+            op-ufm/.* run-build-op-ufm true
            .circleci/.* run-all true
            .github/.* run-all true

--- a/.circleci/continue_config.yml
+++ b/.circleci/continue_config.yml
@ -10,6 +10,9 @@ parameters:
  run-build-op-conductor-mon:
    type: boolean
    default: false
+  run-build-op-ufm:
+    type: boolean
+    default: false
  run-all:
    type: boolean
    default: false
@ -224,7 +227,11 @@ jobs:
      - run:
          name: run lint
          command: |
-            golangci-lint run -E goimports,sqlclosecheck,bodyclose,asciicheck,misspell,errorlint -e "errors.As" -e "errors.Is" --timeout "3m0s" ./...
+             if [ -f .golangci.yml ]; then
+              golangci-lint run -c .golangci.yml -E goimports,sqlclosecheck,bodyclose,asciicheck,misspell,errorlint -e "errors.As" -e "errors.Is" --timeout "3m0s" ./...
+             else
+              golangci-lint run -E goimports,sqlclosecheck,bodyclose,asciicheck,misspell,errorlint -e "errors.As" -e "errors.Is" --timeout "3m0s" ./...
+             fi
          working_directory: <<parameters.module>>

  go-test:
@ -357,3 +364,27 @@ workflows:
            - oplabs-gcr
          requires:
            - op-conductor-mon-docker-build
+  op-ufm:
+    when:
+      or: [<< pipeline.parameters.run-build-op-ufm >>, << pipeline.parameters.run-all >>]
+    jobs:
+      - go-lint:
+          name: op-conductor-mon-lint
+          module: op-ufm
+      - go-test:
+          name: op-conductor-mon-tests
+          module: op-ufm
+      - docker-build:
+          name: op-ufm-docker-build
+          docker_file: op-ufm/Dockerfile
+          docker_name: op-ufm
+          docker_tags: <<pipeline.git.revision>>,<<pipeline.git.branch>>
+          docker_context: .
+      - docker-publish:
+          name: op-ufm-docker-publish
+          docker_name: op-ufm
+          docker_tags: <<pipeline.git.revision>>,<<pipeline.git.branch>>
+          context:
+            - oplabs-gcr
+          requires:
+            - op-ufm-docker-build
--- a/op-ufm/.gitignore
+++ b/op-ufm/.gitignore
@ -0,0 +1,4 @@
+bin
+tls
+
+config.toml
--- a/op-ufm/.golangci.yml
+++ b/op-ufm/.golangci.yml
@ -0,0 +1,10 @@
+linters-settings:
+  staticcheck:
+    checks: ["all"]
+
+issues:
+  exclude-rules:
+    - path: "pkg/provider/roundtrip.go"
+      linters:
+        - staticcheck
+      text: "SA4006"
--- a/op-ufm/Dockerfile
+++ b/op-ufm/Dockerfile
@ -0,0 +1,30 @@
+FROM golang:1.21.1-alpine3.18 as builder
+
+ARG GITCOMMIT=docker
+ARG GITDATE=docker
+ARG GITVERSION=docker
+
+RUN apk add make jq git gcc musl-dev linux-headers
+
+COPY ./op-ufm /app
+
+WORKDIR /app
+
+RUN make ufm
+
+FROM alpine:3.18
+
+COPY --from=builder /app/entrypoint.sh /bin/entrypoint.sh
+COPY --from=builder /app/bin/ufm /bin/ufm
+
+RUN apk update && \
+    chmod +x /bin/entrypoint.sh
+
+RUN apk add ca-certificates jq curl bind-tools
+
+VOLUME /etc/ufm
+
+EXPOSE 8080
+
+ENTRYPOINT ["/bin/entrypoint.sh"]
+CMD ["/bin/ufm", "/etc/ufm/config.toml"]
--- a/op-ufm/Makefile
+++ b/op-ufm/Makefile
@ -0,0 +1,36 @@
+LDFLAGSSTRING +=-X main.GitCommit=$(GITCOMMIT)
+LDFLAGSSTRING +=-X main.GitDate=$(GITDATE)
+LDFLAGSSTRING +=-X main.GitVersion=$(GITVERSION)
+LDFLAGS := -ldflags "$(LDFLAGSSTRING)"
+
+ufm:
+	go build -v $(LDFLAGS) -o ./bin/ufm ./cmd/ufm
+.PHONY: ufm
+
+fmt:
+	go mod tidy
+	gofmt -w .
+.PHONY: fmt
+
+test:
+	go test -race -v ./...
+.PHONY: test
+
+lint:
+	go vet ./...
+.PHONY: lint
+
+tls:
+	kubectl get secrets op-ufm-client-tls -o yaml | yq '.data."tls.key"' | base64 --decode > tls/tls.key
+	kubectl get secrets op-ufm-client-tls -o yaml | yq '.data."tls.crt"' | base64 --decode > tls/tls.crt
+	kubectl get secrets op-ufm-client-tls -o yaml | yq '.data."ca.crt"' | base64 --decode > tls/ca.crt
+.PHONY: tls
+
+mod-tidy:
+	# Below GOPRIVATE line allows mod-tidy to be run immediately after
+	# releasing new versions. This bypasses the Go modules proxy, which
+	# can take a while to index new versions.
+	#
+	# See https://proxy.golang.org/ for more info.
+	export GOPRIVATE="github.com/ethereum-optimism" && go mod tidy
+.PHONY: mod-tidy
--- a/op-ufm/README.md
+++ b/op-ufm/README.md
@ -0,0 +1,23 @@
+# OP User Facing Monitoring
+
+This project simulates a synthetic user interacting with a OP Stack chain.
+
+It is intended to be used as a tool for monitoring
+the health of the network by measuring end-to-end transaction latency.
+
+
+## Metrics
+
+* Round-trip duration time to get transaction receipt (from creation timestamp)
+ 
+* First-seen duration time (from creation timestamp) 
+
+
+## Usage
+
+Run `make ufm` to build the binary. No additional dependencies are necessary.
+
+Copy `example.config.toml` to `config.toml` and edit the file to configure the service.
+
+Start the service with `ufm config.toml`.
+
--- a/op-ufm/cmd/ufm/main.go
+++ b/op-ufm/cmd/ufm/main.go
@ -0,0 +1,84 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"golang.org/x/exp/slog"
+
+	"github.com/ethereum/go-ethereum/log"
+
+	oplog "github.com/ethereum-optimism/optimism/op-service/log"
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/config"
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/service"
+)
+
+var (
+	GitVersion = ""
+	GitCommit  = ""
+	GitDate    = ""
+)
+
+func main() {
+	oplog.SetGlobalLogHandler(slog.NewJSONHandler(
+		os.Stdout, &slog.HandlerOptions{Level: slog.LevelInfo}))
+
+	log.Info("initializing",
+		"version", GitVersion,
+		"commit", GitCommit,
+		"date", GitDate)
+
+	if len(os.Args) < 2 {
+		log.Crit("must specify a config file on the command line")
+	}
+	cfg := initConfig(os.Args[1])
+
+	ctx := context.Background()
+	svc := service.New(cfg)
+	svc.Start(ctx)
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
+	recvSig := <-sig
+	log.Info("caught signal, shutting down",
+		"signal", recvSig)
+
+	svc.Shutdown()
+}
+
+func initConfig(cfgFile string) *config.Config {
+	cfg, err := config.New(cfgFile)
+	if err != nil {
+		log.Crit("error reading config file",
+			"file", cfgFile,
+			"err", err)
+	}
+
+	// update log level from config
+	logLevel, err := oplog.LevelFromString(cfg.LogLevel)
+	if err != nil {
+		logLevel = log.LevelInfo
+		if cfg.LogLevel != "" {
+			log.Warn("invalid server.log_level",
+				"log_level", cfg.LogLevel)
+		}
+	}
+	oplog.SetGlobalLogHandler(slog.NewJSONHandler(
+		os.Stdout, &slog.HandlerOptions{Level: logLevel}))
+
+	// readable parsed config
+	jsonCfg, _ := json.MarshalIndent(cfg, "", "  ")
+	fmt.Printf("%s", string(jsonCfg))
+
+	err = cfg.Validate()
+	if err != nil {
+		log.Crit("invalid config",
+			"err", err)
+	}
+
+	return cfg
+}
--- a/op-ufm/entrypoint.sh
+++ b/op-ufm/entrypoint.sh
@ -0,0 +1,6 @@
+#!/bin/sh
+
+echo "Updating CA certificates."
+update-ca-certificates
+echo "Running CMD."
+exec "$@"
--- a/op-ufm/example.config.toml
+++ b/op-ufm/example.config.toml
@ -0,0 +1,83 @@
+# Log level.
+# Possible values: trace | debug | info | warn | error | crit
+# Default: debug
+log_level = "debug"
+
+[signer_service]
+# URL to the signer service
+url = "http://localhost:1234"
+tls_ca_cert = "tls/ca.crt"
+tls_cert = "tls/tls.crt"
+tls_key = "tls/tls.key"
+
+[healthz]
+# Whether or not to enable healthz endpoint
+enabled = true
+# Host for the healthz endpoint to listen on
+host = "0.0.0.0"
+# Port for the above.
+port = "8080"
+
+[metrics]
+# Whether or not to enable Prometheus metrics
+enabled = true
+# Host for the Prometheus metrics endpoint to listen on.
+host = "0.0.0.0"
+# Port for the above.
+port = "9761"
+
+[wallets.default]
+# OP Stack Chain ID
+# see https://community.optimism.io/docs/useful-tools/networks/
+chain_id = 420
+# Signer method to use
+# Possible values: signer | static
+signer_method = "static"
+# Address used to send transactions
+address = "0x0000000000000000000000000000000000000000"
+# For static signer method, the private key to use
+private_key = "0000000000000000000000000000000000000000000000000000000000000000"
+# Transaction value in wei
+tx_value = 100000000000000
+
+[providers.p1]
+# URL to the RPC provider
+url = "http://localhost:8551"
+# Read only providers are only used to check for transactions
+read_only = true
+# Interval to poll the provider for expected transactions
+read_interval = "10s"
+# Interval to submit new transactions to the provider
+send_interval = "30s"
+# Interval between send transaction when we get "already known" txpool err
+send_transaction_retry_interval = "100ms"
+# Max time to retry
+send_transaction_retry_timeout = "5s"
+# Interval between each send transaction to the same network
+send_transaction_cool_down = "30s"
+# Interval between receipt retrieval
+receipt_retrieval_interval = "500ms"
+# Max time to check for receipt
+receipt_retrieval_timeout = "2m"
+
+[providers.p2]
+# Uncomment to disable this provider
+# disabled=true
+# URL to the RPC provider
+url = "http://localhost:8552"
+# Read only providers are only used to check for transactions
+read_only = false
+# Interval to poll the provider for expected transactions
+read_interval = "10s"
+# Interval to submit new transactions to the provider
+send_interval = "30s"
+# Interval between send transaction when we get "already known" txpool err
+send_transaction_retry_interval = "100ms"
+# Max time to retry
+send_transaction_retry_timeout = "5s"
+# Interval between each send transaction to the same network
+send_transaction_cool_down = "30s"
+# Interval between receipt retrieval
+receipt_retrieval_interval = "500ms"
+# Max time to check for receipt
+receipt_retrieval_timeout = "2m"
--- a/op-ufm/go.mod
+++ b/op-ufm/go.mod
@ -0,0 +1,101 @@
+module github.com/ethereum-optimism/optimism/op-ufm
+
+go 1.21
+
+toolchain go1.21.6
+
+require (
+	cloud.google.com/go/kms v1.12.1
+	github.com/BurntSushi/toml v1.3.2
+	github.com/ethereum-optimism/optimism v1.7.7-0.20240529212843-af0999ccc31d
+	github.com/ethereum/go-ethereum v1.13.15
+	github.com/gorilla/mux v1.8.0
+	github.com/pkg/errors v0.9.1
+	github.com/prometheus/client_golang v1.19.0
+	github.com/rs/cors v1.9.0
+	golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3
+)
+
+require (
+	cloud.google.com/go/compute v1.20.1 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	cloud.google.com/go/iam v1.1.0 // indirect
+	github.com/DataDog/zstd v1.5.2 // indirect
+	github.com/Microsoft/go-winio v0.6.1 // indirect
+	github.com/VictoriaMetrics/fastcache v1.12.1 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/bits-and-blooms/bitset v1.10.0 // indirect
+	github.com/btcsuite/btcd/btcec/v2 v2.2.0 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cockroachdb/errors v1.11.1 // indirect
+	github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect
+	github.com/cockroachdb/pebble v0.0.0-20231018212520-f6cde3fc2fa4 // indirect
+	github.com/cockroachdb/redact v1.1.5 // indirect
+	github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect
+	github.com/consensys/bavard v0.1.13 // indirect
+	github.com/consensys/gnark-crypto v0.12.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/crate-crypto/go-ipa v0.0.0-20231025140028-3c0104f4b233 // indirect
+	github.com/crate-crypto/go-kzg-4844 v0.7.0 // indirect
+	github.com/deckarep/golang-set/v2 v2.1.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 // indirect
+	github.com/ethereum-optimism/superchain-registry/superchain v0.0.0-20240522134500-19555bdbdc95 // indirect
+	github.com/ethereum/c-kzg-4844 v0.4.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/gballet/go-verkle v0.1.1-0.20231031103413-a67434b50f46 // indirect
+	github.com/getsentry/sentry-go v0.18.0 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
+	github.com/gofrs/flock v0.8.1 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/s2a-go v0.1.4 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.2.5 // indirect
+	github.com/googleapis/gax-go/v2 v2.12.0 // indirect
+	github.com/gorilla/websocket v1.5.1 // indirect
+	github.com/holiman/bloomfilter/v2 v2.0.3 // indirect
+	github.com/holiman/uint256 v1.2.4 // indirect
+	github.com/klauspost/compress v1.17.6 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mattn/go-runewidth v0.0.14 // indirect
+	github.com/mmcloughlin/addchain v0.4.0 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.48.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/rivo/uniseg v0.4.3 // indirect
+	github.com/rogpeppe/go-internal v1.10.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/shirou/gopsutil v3.21.11+incompatible // indirect
+	github.com/supranational/blst v0.3.11 // indirect
+	github.com/syndtr/goleveldb v1.0.1-0.20220614013038-64ee5596c38a // indirect
+	github.com/tklauser/go-sysconf v0.3.12 // indirect
+	github.com/tklauser/numcpus v0.6.1 // indirect
+	github.com/urfave/cli/v2 v2.27.1 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	github.com/yusufpapurcu/wmi v1.2.3 // indirect
+	go.opencensus.io v0.24.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/mod v0.14.0 // indirect
+	golang.org/x/net v0.23.0 // indirect
+	golang.org/x/oauth2 v0.16.0 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/term v0.20.0 // indirect
+	golang.org/x/text v0.15.0 // indirect
+	golang.org/x/tools v0.17.0 // indirect
+	google.golang.org/api v0.132.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20230706204954-ccb25ca9f130 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20230706204954-ccb25ca9f130 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
+	google.golang.org/grpc v1.56.3 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	rsc.io/tmplfunc v0.0.3 // indirect
+)
+
+replace github.com/ethereum/go-ethereum => github.com/ethereum-optimism/op-geth v1.101315.1-rc.5
--- a/op-ufm/go.sum
+++ b/op-ufm/go.sum
@ -0,0 +1,461 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.110.4 h1:1JYyxKMN9hd5dR2MYTPWkGUgcoxVVhg0LKNKEo0qvmk=
+cloud.google.com/go v0.110.4/go.mod h1:+EYjdK8e5RME/VY/qLCAtuyALQ9q67dvuum8i+H5xsI=
+cloud.google.com/go/compute v1.20.1 h1:6aKEtlUiwEpJzM001l0yFkpXmUVXaN8W+fbkb2AZNbg=
+cloud.google.com/go/compute v1.20.1/go.mod h1:4tCnrn48xsqlwSAiLf1HXMQk8CONslYbdiEZc9FEIbM=
+cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
+cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
+cloud.google.com/go/iam v1.1.0 h1:67gSqaPukx7O8WLLHMa0PNs3EBGd2eE4d+psbO/CO94=
+cloud.google.com/go/iam v1.1.0/go.mod h1:nxdHjaKfCr7fNYx/HJMM8LgiMugmveWlkatear5gVyk=
+cloud.google.com/go/kms v1.12.1 h1:xZmZuwy2cwzsocmKDOPu4BL7umg8QXagQx6fKVmf45U=
+cloud.google.com/go/kms v1.12.1/go.mod h1:c9J991h5DTl+kg7gi3MYomh12YEENGrf48ee/N/2CDM=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
+github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/DataDog/zstd v1.5.2 h1:vUG4lAyuPCXO0TLbXvPv7EB7cNK1QV/luu55UHLrrn8=
+github.com/DataDog/zstd v1.5.2/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
+github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow=
+github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
+github.com/VictoriaMetrics/fastcache v1.12.1 h1:i0mICQuojGDL3KblA7wUNlY5lOK6a4bwt3uRKnkZU40=
+github.com/VictoriaMetrics/fastcache v1.12.1/go.mod h1:tX04vaqcNoQeGLD+ra5pU5sWkuxnzWhEzLwhP9w653o=
+github.com/allegro/bigcache v1.2.1-0.20190218064605-e24eb225f156/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2ucNfQESPXM=
+github.com/allegro/bigcache v1.2.1 h1:hg1sY1raCwic3Vnsvje6TT7/pnZba83LeFck5NrFKSc=
+github.com/allegro/bigcache v1.2.1/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2ucNfQESPXM=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
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--- a/op-ufm/pkg/config/config.go
+++ b/op-ufm/pkg/config/config.go
@ -0,0 +1,171 @@
+package config
+
+import (
+	"math/big"
+
+	"github.com/BurntSushi/toml"
+	"github.com/pkg/errors"
+)
+
+type Config struct {
+	LogLevel string `toml:"log_level"`
+
+	Signer  SignerServiceConfig `toml:"signer_service"`
+	Metrics MetricsConfig       `toml:"metrics"`
+	Healthz HealthzConfig       `toml:"healthz"`
+
+	Wallets   map[string]*WalletConfig   `toml:"wallets"`
+	Providers map[string]*ProviderConfig `toml:"providers"`
+}
+
+type SignerServiceConfig struct {
+	URL       string `toml:"url"`
+	TLSCaCert string `toml:"tls_ca_cert"`
+	TLSCert   string `toml:"tls_cert"`
+	TLSKey    string `toml:"tls_key"`
+}
+
+type MetricsConfig struct {
+	Enabled bool   `toml:"enabled"`
+	Debug   bool   `toml:"debug"`
+	Host    string `toml:"host"`
+	Port    string `toml:"port"`
+}
+
+type HealthzConfig struct {
+	Enabled bool   `toml:"enabled"`
+	Host    string `toml:"host"`
+	Port    string `toml:"port"`
+}
+
+type WalletConfig struct {
+	ChainID big.Int `toml:"chain_id"`
+
+	// signer | static
+	SignerMethod string `toml:"signer_method"`
+	Address      string `toml:"address"`
+	// private key is used for static signing
+	PrivateKey string `toml:"private_key"`
+
+	// transaction parameters
+	TxValue big.Int `toml:"tx_value"`
+}
+
+type ProviderConfig struct {
+	Network string `toml:"network"`
+	URL     string `toml:"url"`
+
+	ReadOnly     bool         `toml:"read_only"`
+	ReadInterval TOMLDuration `toml:"read_interval"`
+
+	SendInterval                 TOMLDuration `toml:"send_interval"`
+	SendTransactionRetryInterval TOMLDuration `toml:"send_transaction_retry_interval"`
+	SendTransactionRetryTimeout  TOMLDuration `toml:"send_transaction_retry_timeout"`
+	SendTransactionCoolDown      TOMLDuration `toml:"send_transaction_cool_down"`
+	ReceiptRetrievalInterval     TOMLDuration `toml:"receipt_retrieval_interval"`
+	ReceiptRetrievalTimeout      TOMLDuration `toml:"receipt_retrieval_timeout"`
+
+	Wallet string `toml:"wallet"`
+}
+
+func New(file string) (*Config, error) {
+	cfg := &Config{}
+	if _, err := toml.DecodeFile(file, cfg); err != nil {
+		return nil, err
+	}
+	return cfg, nil
+}
+
+func (c *Config) Validate() error {
+	if c.Metrics.Enabled {
+		if c.Metrics.Host == "" || c.Metrics.Port == "" {
+			return errors.New("metrics is enabled but host or port are missing")
+		}
+	}
+	if c.Healthz.Enabled {
+		if c.Healthz.Host == "" || c.Healthz.Port == "" {
+			return errors.New("healthz is enabled but host or port are missing")
+		}
+	}
+
+	if len(c.Wallets) == 0 {
+		return errors.New("at least one wallet must be set")
+	}
+
+	if len(c.Providers) == 0 {
+		return errors.New("at least one provider must be set")
+	}
+
+	for name, wallet := range c.Wallets {
+		if wallet.ChainID.BitLen() == 0 {
+			return errors.Errorf("wallet [%s] chain_id is missing", name)
+		}
+		if wallet.SignerMethod != "signer" && wallet.SignerMethod != "static" {
+			return errors.Errorf("wallet [%s] signer_method is invalid", name)
+		}
+		if wallet.SignerMethod == "signer" {
+			if c.Signer.URL == "" {
+				return errors.New("signer url is missing")
+			}
+			if c.Signer.TLSCaCert == "" {
+				return errors.New("signer tls_ca_cert is missing")
+			}
+			if c.Signer.TLSCert == "" {
+				return errors.New("signer tls_cert is missing")
+			}
+			if c.Signer.TLSKey == "" {
+				return errors.New("signer tls_key is missing")
+			}
+		}
+		if wallet.SignerMethod == "static" {
+			if wallet.PrivateKey == "" {
+				return errors.Errorf("wallet [%s] private_key is missing", name)
+			}
+		}
+		if wallet.Address == "" {
+			return errors.Errorf("wallet [%s] address is missing", name)
+		}
+		if wallet.TxValue.BitLen() == 0 {
+			return errors.Errorf("wallet [%s] tx_value is missing", name)
+		}
+	}
+
+	for name, provider := range c.Providers {
+		if provider.URL == "" {
+			return errors.Errorf("provider [%s] url is missing", name)
+		}
+		if provider.ReadInterval == 0 {
+			return errors.Errorf("provider [%s] read_interval is missing", name)
+		}
+		if provider.SendInterval == 0 {
+			return errors.Errorf("provider [%s] send_interval is missing", name)
+		}
+		if provider.SendTransactionRetryInterval == 0 {
+			return errors.Errorf("provider [%s] send_transaction_retry_interval is missing", name)
+		}
+		if provider.SendTransactionRetryTimeout == 0 {
+			return errors.Errorf("provider [%s] send_transaction_retry_timeout is missing", name)
+		}
+		if provider.SendTransactionCoolDown == 0 {
+			return errors.Errorf("provider [%s] send_transaction_cool_down is missing", name)
+		}
+		if provider.ReceiptRetrievalInterval == 0 {
+			return errors.Errorf("provider [%s] receipt_retrieval_interval is missing", name)
+		}
+		if provider.ReceiptRetrievalTimeout == 0 {
+			return errors.Errorf("provider [%s] receipt_retrieval_timeout is missing", name)
+		}
+		if provider.Wallet == "" {
+			return errors.Errorf("provider [%s] wallet is missing", name)
+		}
+		if _, ok := c.Wallets[provider.Wallet]; !ok {
+			return errors.Errorf("provider [%s] has an invalid wallet [%s]", name, provider.Wallet)
+		}
+	}
+
+	if c.LogLevel == "" {
+		c.LogLevel = "debug"
+	}
+
+	return nil
+}
--- a/op-ufm/pkg/config/toml_duration.go
+++ b/op-ufm/pkg/config/toml_duration.go
@ -0,0 +1,15 @@
+package config
+
+import "time"
+
+type TOMLDuration time.Duration
+
+func (t *TOMLDuration) UnmarshalText(b []byte) error {
+	d, err := time.ParseDuration(string(b))
+	if err != nil {
+		return err
+	}
+
+	*t = TOMLDuration(d)
+	return nil
+}
--- a/op-ufm/pkg/metrics/clients/eth.go
+++ b/op-ufm/pkg/metrics/clients/eth.go
@ -0,0 +1,123 @@
+package clients
+
+import (
+	"context"
+	"math/big"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics"
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/txpool"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethclient"
+)
+
+type InstrumentedEthClient struct {
+	c            *ethclient.Client
+	providerName string
+}
+
+func Dial(providerName string, url string) (*InstrumentedEthClient, error) {
+	start := time.Now()
+	c, err := ethclient.Dial(url)
+	if err != nil {
+		metrics.RecordErrorDetails(providerName, "ethclient.Dial", err)
+		return nil, err
+	}
+	metrics.RecordRPCLatency(providerName, "ethclient", "Dial", time.Since(start))
+	return &InstrumentedEthClient{c: c, providerName: providerName}, nil
+}
+
+func (i *InstrumentedEthClient) TransactionByHash(ctx context.Context, hash common.Hash) (*types.Transaction, bool, error) {
+	start := time.Now()
+	tx, isPending, err := i.c.TransactionByHash(ctx, hash)
+	if err != nil {
+		if !i.ignorableErrors(err) {
+			metrics.RecordErrorDetails(i.providerName, "ethclient.TransactionByHash", err)
+		}
+		return nil, false, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "TransactionByHash", time.Since(start))
+	return tx, isPending, err
+}
+
+func (i *InstrumentedEthClient) PendingNonceAt(ctx context.Context, address string) (uint64, error) {
+	start := time.Now()
+	nonce, err := i.c.PendingNonceAt(ctx, common.HexToAddress(address))
+	if err != nil {
+		metrics.RecordErrorDetails(i.providerName, "ethclient.PendingNonceAt", err)
+		return 0, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "PendingNonceAt", time.Since(start))
+	return nonce, err
+}
+
+func (i *InstrumentedEthClient) TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error) {
+	start := time.Now()
+	receipt, err := i.c.TransactionReceipt(ctx, txHash)
+	if err != nil {
+		if !i.ignorableErrors(err) {
+			metrics.RecordErrorDetails(i.providerName, "ethclient.TransactionReceipt", err)
+		}
+		return nil, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "TransactionReceipt", time.Since(start))
+	return receipt, err
+}
+
+func (i *InstrumentedEthClient) SendTransaction(ctx context.Context, tx *types.Transaction) error {
+	start := time.Now()
+	err := i.c.SendTransaction(ctx, tx)
+	if err != nil {
+		if !i.ignorableErrors(err) {
+			metrics.RecordErrorDetails(i.providerName, "ethclient.SendTransaction", err)
+		}
+		return err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "SendTransaction", time.Since(start))
+	return err
+}
+
+func (i *InstrumentedEthClient) EstimateGas(ctx context.Context, msg ethereum.CallMsg) (uint64, error) {
+	start := time.Now()
+	gas, err := i.c.EstimateGas(ctx, msg)
+	if err != nil {
+		metrics.RecordErrorDetails(i.providerName, "ethclient.EstimateGas", err)
+		return 0, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "EstimateGas", time.Since(start))
+	return gas, err
+}
+
+func (i *InstrumentedEthClient) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
+	start := time.Now()
+	gasTipCap, err := i.c.SuggestGasTipCap(ctx)
+	if err != nil {
+		metrics.RecordErrorDetails(i.providerName, "ethclient.SuggestGasTipCap", err)
+		return nil, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "SuggestGasTipCap", time.Since(start))
+	return gasTipCap, err
+}
+
+func (i *InstrumentedEthClient) HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error) {
+	start := time.Now()
+	header, err := i.c.HeaderByNumber(ctx, number)
+	if err != nil {
+		metrics.RecordErrorDetails(i.providerName, "ethclient.HeaderByNumber", err)
+		return nil, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "ethclient", "HeaderByNumber", time.Since(start))
+	return header, err
+}
+
+func (i *InstrumentedEthClient) ignorableErrors(err error) bool {
+	msg := err.Error()
+	// we dont use errors.Is because eth client actually uses errors.New,
+	// therefore creating an incomparable instance :(
+	return msg == ethereum.NotFound.Error() ||
+		msg == txpool.ErrAlreadyKnown.Error() ||
+		msg == core.ErrNonceTooLow.Error()
+}
--- a/op-ufm/pkg/metrics/clients/signer.go
+++ b/op-ufm/pkg/metrics/clients/signer.go
@ -0,0 +1,42 @@
+package clients
+
+import (
+	"context"
+	"math/big"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics"
+	"github.com/ethereum/go-ethereum/common"
+
+	signer "github.com/ethereum-optimism/optimism/op-service/signer"
+	optls "github.com/ethereum-optimism/optimism/op-service/tls"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/log"
+)
+
+type InstrumentedSignerClient struct {
+	c            *signer.SignerClient
+	providerName string
+}
+
+func NewSignerClient(providerName string, logger log.Logger, endpoint string, tlsConfig optls.CLIConfig) (*InstrumentedSignerClient, error) {
+	start := time.Now()
+	c, err := signer.NewSignerClient(logger, endpoint, tlsConfig)
+	if err != nil {
+		metrics.RecordErrorDetails(providerName, "signer.NewSignerClient", err)
+		return nil, err
+	}
+	metrics.RecordRPCLatency(providerName, "signer", "NewSignerClient", time.Since(start))
+	return &InstrumentedSignerClient{c: c, providerName: providerName}, nil
+}
+
+func (i *InstrumentedSignerClient) SignTransaction(ctx context.Context, chainId *big.Int, from *common.Address, tx *types.Transaction) (*types.Transaction, error) {
+	start := time.Now()
+	tx, err := i.c.SignTransaction(ctx, chainId, *from, tx)
+	if err != nil {
+		metrics.RecordErrorDetails(i.providerName, "signer.SignTransaction", err)
+		return nil, err
+	}
+	metrics.RecordRPCLatency(i.providerName, "signer", "SignTransaction", time.Since(start))
+	return tx, err
+}
--- a/op-ufm/pkg/metrics/metrics.go
+++ b/op-ufm/pkg/metrics/metrics.go
@ -0,0 +1,166 @@
+package metrics
+
+import (
+	fmt "fmt"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+const (
+	MetricsNamespace = "ufm"
+)
+
+var (
+	Debug bool
+
+	errorsTotal = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "errors_total",
+		Help:      "Count of errors",
+	}, []string{
+		"provider",
+		"error",
+	})
+
+	rpcLatency = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "rpc_latency",
+		Help:      "RPC latency per provider, client and method (ms)",
+	}, []string{
+		"provider",
+		"client",
+		"method",
+	})
+
+	roundTripLatency = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "roundtrip_latency",
+		Help:      "Round trip latency per provider (ms)",
+	}, []string{
+		"provider",
+	})
+
+	gasUsed = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "gas_used",
+		Help:      "Gas used per provider",
+	}, []string{
+		"provider",
+	})
+
+	firstSeenLatency = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "first_seen_latency",
+		Help:      "First seen latency latency per provider (ms)",
+	}, []string{
+		"provider_source",
+		"provider_seen",
+	})
+
+	providerToProviderLatency = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "provider_to_provider_latency",
+		Help:      "Provider to provider latency (ms)",
+	}, []string{
+		"provider_source",
+		"provider_seen",
+	})
+
+	networkTransactionsInFlight = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: MetricsNamespace,
+		Name:      "transactions_inflight",
+		Help:      "Transactions in flight, per network",
+	}, []string{
+		"network",
+	})
+)
+
+var nonAlphanumericRegex = regexp.MustCompile(`[^a-zA-Z ]+`)
+
+func RecordError(provider string, errorLabel string) {
+	if Debug {
+		log.Debug("metric inc",
+			"m", "errors_total",
+			"provider", provider,
+			"error", errorLabel)
+	}
+	errorsTotal.WithLabelValues(provider, errorLabel).Inc()
+}
+
+// RecordErrorDetails concats the error message to the label removing non-alpha chars
+func RecordErrorDetails(provider string, label string, err error) {
+	errClean := nonAlphanumericRegex.ReplaceAllString(err.Error(), "")
+	errClean = strings.ReplaceAll(errClean, " ", "_")
+	errClean = strings.ReplaceAll(errClean, "__", "_")
+	label = fmt.Sprintf("%s.%s", label, errClean)
+	RecordError(provider, label)
+}
+
+func RecordRPCLatency(provider string, client string, method string, latency time.Duration) {
+	if Debug {
+		log.Debug("metric set",
+			"m", "rpc_latency",
+			"provider", provider,
+			"client", client,
+			"method", method,
+			"latency", latency)
+	}
+	rpcLatency.WithLabelValues(provider, client, method).Set(float64(latency.Milliseconds()))
+}
+
+func RecordRoundTripLatency(provider string, latency time.Duration) {
+	if Debug {
+		log.Debug("metric set",
+			"m", "roundtrip_latency",
+			"provider", provider,
+			"latency", latency)
+	}
+	roundTripLatency.WithLabelValues(provider).Set(float64(latency.Milliseconds()))
+}
+
+func RecordGasUsed(provider string, val uint64) {
+	if Debug {
+		log.Debug("metric add",
+			"m", "gas_used",
+			"provider", provider,
+			"val", val)
+	}
+	gasUsed.WithLabelValues(provider).Set(float64(val))
+}
+
+func RecordFirstSeenLatency(providerSource string, providerSeen string, latency time.Duration) {
+	if Debug {
+		log.Debug("metric set",
+			"m", "first_seen_latency",
+			"provider_source", providerSource,
+			"provider_seen", providerSeen,
+			"latency", latency)
+	}
+	firstSeenLatency.WithLabelValues(providerSource, providerSeen).Set(float64(latency.Milliseconds()))
+}
+
+func RecordProviderToProviderLatency(providerSource string, providerSeen string, latency time.Duration) {
+	if Debug {
+		log.Debug("metric set",
+			"m", "provider_to_provider_latency",
+			"provider_source", providerSource,
+			"provider_seen", providerSeen,
+			"latency", latency)
+	}
+	providerToProviderLatency.WithLabelValues(providerSource, providerSeen).Set(float64(latency.Milliseconds()))
+}
+
+func RecordTransactionsInFlight(network string, count int) {
+	if Debug {
+		log.Debug("metric set",
+			"m", "transactions_inflight",
+			"network", network,
+			"count", count)
+	}
+	networkTransactionsInFlight.WithLabelValues(network).Set(float64(count))
+}
--- a/op-ufm/pkg/provider/heartbeat.go
+++ b/op-ufm/pkg/provider/heartbeat.go
@ -0,0 +1,104 @@
+package provider
+
+import (
+	"context"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics"
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics/clients"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/pkg/errors"
+)
+
+// Heartbeat polls for expected in-flight transactions
+func (p *Provider) Heartbeat(ctx context.Context) {
+	log.Debug("heartbeat",
+		"provider", p.name,
+		"count", len(p.txPool.Transactions))
+
+	metrics.RecordTransactionsInFlight(p.config.Network, len(p.txPool.Transactions))
+
+	// let's exclude transactions already seen by this provider, or originated by it
+	expectedTransactions := make([]*TransactionState, 0, len(p.txPool.Transactions))
+	alreadySeen := 0
+	for _, st := range p.txPool.Transactions {
+		if st.ProviderSource == p.name {
+			continue
+		}
+		if _, exist := st.SeenBy[p.name]; exist {
+			alreadySeen++
+			continue
+		}
+		expectedTransactions = append(expectedTransactions, st)
+	}
+
+	if len(expectedTransactions) == 0 {
+		log.Debug("no expected txs",
+			"count", len(p.txPool.Transactions),
+			"provider", p.name,
+			"alreadySeen", alreadySeen)
+		return
+	}
+
+	client, err := clients.Dial(p.name, p.config.URL)
+	if err != nil {
+		log.Error("cant dial to provider",
+			"provider", p.name,
+			"url", p.config.URL,
+			"err", err)
+	}
+
+	log.Debug("checking in-flight tx",
+		"count", len(p.txPool.Transactions),
+		"provider", p.name,
+		"alreadySeen", alreadySeen)
+	for _, st := range expectedTransactions {
+		hash := st.Hash.Hex()
+
+		_, isPending, err := client.TransactionByHash(ctx, st.Hash)
+		if err != nil && !errors.Is(err, ethereum.NotFound) {
+			log.Error("cant check transaction",
+				"provider", p.name,
+				"hash", hash,
+				"url", p.config.URL,
+				"err", err)
+			continue
+		}
+
+		log.Debug("got transaction",
+			"provider", p.name,
+			"hash", hash,
+			"isPending", isPending)
+
+		// mark transaction as seen by this provider
+		st.M.Lock()
+		latency := time.Since(st.SentAt)
+		if st.FirstSeen.IsZero() {
+			st.FirstSeen = time.Now()
+			metrics.RecordFirstSeenLatency(st.ProviderSource, p.name, latency)
+			log.Info("transaction first seen",
+				"hash", hash,
+				"firstSeenLatency", latency,
+				"providerSource", st.ProviderSource,
+				"providerSeen", p.name)
+		}
+		if _, exist := st.SeenBy[p.name]; !exist {
+			st.SeenBy[p.name] = time.Now()
+			metrics.RecordProviderToProviderLatency(st.ProviderSource, p.name, latency)
+		}
+		st.M.Unlock()
+
+		// check if transaction have been seen by all providers
+		p.txPool.M.Lock()
+		if len(st.SeenBy) == p.txPool.Expected {
+			log.Debug("transaction seen by all",
+				"hash", hash,
+				"expected", p.txPool.Expected,
+				"seenBy", len(st.SeenBy))
+			delete(p.txPool.Transactions, st.Hash.Hex())
+		}
+		p.txPool.M.Unlock()
+	}
+}
--- a/op-ufm/pkg/provider/provider.go
+++ b/op-ufm/pkg/provider/provider.go
@ -0,0 +1,72 @@
+package provider
+
+import (
+	"context"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/config"
+)
+
+type Provider struct {
+	name         string
+	config       *config.ProviderConfig
+	signerConfig *config.SignerServiceConfig
+	walletConfig *config.WalletConfig
+	txPool       *NetworkTransactionPool
+
+	cancelFunc context.CancelFunc
+}
+
+func New(name string, cfg *config.ProviderConfig,
+	signerConfig *config.SignerServiceConfig,
+	walletConfig *config.WalletConfig,
+	txPool *NetworkTransactionPool) *Provider {
+	p := &Provider{
+		name:         name,
+		config:       cfg,
+		signerConfig: signerConfig,
+		walletConfig: walletConfig,
+		txPool:       txPool,
+	}
+	return p
+}
+
+func (p *Provider) Start(ctx context.Context) {
+	providerCtx, cancelFunc := context.WithCancel(ctx)
+	p.cancelFunc = cancelFunc
+
+	schedule(providerCtx, time.Duration(p.config.ReadInterval), p.Heartbeat)
+	if !p.config.ReadOnly {
+		schedule(providerCtx, time.Duration(p.config.SendInterval), p.RoundTrip)
+	}
+}
+
+func (p *Provider) Shutdown() {
+	if p.cancelFunc != nil {
+		p.cancelFunc()
+	}
+}
+
+func (p *Provider) Name() string {
+	return p.name
+}
+
+func (p *Provider) URL() string {
+	return p.config.URL
+}
+
+func schedule(ctx context.Context, interval time.Duration, handler func(ctx context.Context)) {
+	go func() {
+		for {
+			timer := time.NewTimer(interval)
+			handler(ctx)
+
+			select {
+			case <-timer.C:
+			case <-ctx.Done():
+				timer.Stop()
+				return
+			}
+		}
+	}()
+}
--- a/op-ufm/pkg/provider/roundtrip.go
+++ b/op-ufm/pkg/provider/roundtrip.go
@ -0,0 +1,312 @@
+package provider
+
+import (
+	"context"
+	"math/big"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics"
+	iclients "github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics/clients"
+	"github.com/ethereum/go-ethereum/core"
+
+	"github.com/ethereum-optimism/optimism/op-service/tls"
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/txpool"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/pkg/errors"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/log"
+)
+
+// RoundTrip send a new transaction to measure round trip latency
+func (p *Provider) RoundTrip(ctx context.Context) {
+	log.Debug("RoundTrip",
+		"provider", p.name)
+
+	client, err := iclients.Dial(p.name, p.config.URL)
+	if err != nil {
+		log.Error("cant dial to provider",
+			"provider", p.name,
+			"url", p.config.URL,
+			"err", err)
+		return
+	}
+
+	p.txPool.ExclusiveSend.Lock()
+	defer p.txPool.ExclusiveSend.Unlock()
+
+	// lint:ignore SA4006 txHash is set and used within tx sending loop
+	txHash := common.Hash{}
+	attempt := 0
+	nonce := uint64(0)
+
+	// used for timeout
+	firstAttemptAt := time.Now()
+	// used for actual round trip time (disregard retry time)
+	var roundTripStartedAt time.Time
+	for {
+
+		// sleep until we get a clear to send
+		for {
+			coolDown := time.Duration(p.config.SendTransactionCoolDown) - time.Since(p.txPool.LastSend)
+			if coolDown > 0 {
+				time.Sleep(coolDown)
+			} else {
+				break
+			}
+		}
+
+		from, tx, err := p.createTx(ctx, client, nonce)
+		if err != nil {
+			log.Error("cant create tx",
+				"provider", p.name,
+				"nonce", nonce,
+				"err", err)
+			return
+		}
+		nonce = tx.Nonce()
+
+		signedTx, err := p.sign(ctx, from, tx)
+		if err != nil {
+			log.Error("cant sign tx",
+				"provider", p.name,
+				"tx", tx,
+				"err", err)
+			return
+		}
+		txHash = signedTx.Hash()
+
+		roundTripStartedAt = time.Now()
+		err = client.SendTransaction(ctx, signedTx)
+		if err != nil {
+			if err.Error() == txpool.ErrAlreadyKnown.Error() ||
+				err.Error() == txpool.ErrReplaceUnderpriced.Error() ||
+				err.Error() == core.ErrNonceTooLow.Error() {
+
+				log.Warn("cant send transaction (retryable)",
+					"provider", p.name,
+					"err", err,
+					"nonce", nonce)
+
+				if time.Since(firstAttemptAt) >= time.Duration(p.config.SendTransactionRetryTimeout) {
+					log.Error("send transaction timed out (known already)",
+						"provider", p.name,
+						"hash", txHash.Hex(),
+						"nonce", nonce,
+						"elapsed", time.Since(firstAttemptAt),
+						"attempt", attempt)
+					metrics.RecordErrorDetails(p.name, "send.timeout", err)
+					return
+				}
+
+				log.Warn("tx already known, incrementing nonce and trying again",
+					"provider", p.name,
+					"nonce", nonce)
+				time.Sleep(time.Duration(p.config.SendTransactionRetryInterval))
+
+				nonce++
+				attempt++
+				if attempt%10 == 0 {
+					log.Debug("retrying send transaction...",
+						"provider", p.name,
+						"attempt", attempt,
+						"nonce", nonce,
+						"elapsed", time.Since(firstAttemptAt))
+				}
+			} else {
+				log.Error("cant send transaction",
+					"provider", p.name,
+					"nonce", nonce,
+					"err", err)
+				metrics.RecordErrorDetails(p.name, "ethclient.SendTransaction", err)
+				return
+			}
+		} else {
+			break
+		}
+	}
+
+	log.Info("transaction sent",
+		"provider", p.name,
+		"hash", txHash.Hex(),
+		"nonce", nonce)
+
+	// add to pool
+	sentAt := time.Now()
+	p.txPool.M.Lock()
+	p.txPool.Transactions[txHash.Hex()] = &TransactionState{
+		Hash:           txHash,
+		ProviderSource: p.name,
+		SentAt:         sentAt,
+		SeenBy:         make(map[string]time.Time),
+	}
+	p.txPool.LastSend = sentAt
+	p.txPool.M.Unlock()
+
+	var receipt *types.Receipt
+	attempt = 0
+	for receipt == nil {
+		if time.Since(sentAt) >= time.Duration(p.config.ReceiptRetrievalTimeout) {
+			log.Error("receipt retrieval timed out",
+				"provider", p.name,
+				"hash", txHash,
+				"nonce", nonce,
+				"elapsed", time.Since(sentAt))
+			metrics.RecordErrorDetails(p.name, "receipt.timeout", err)
+			return
+		}
+		time.Sleep(time.Duration(p.config.ReceiptRetrievalInterval))
+		if attempt%10 == 0 {
+			log.Debug("checking for receipt...",
+				"provider", p.name,
+				"hash", txHash,
+				"nonce", nonce,
+				"attempt", attempt,
+				"elapsed", time.Since(sentAt))
+		}
+		receipt, err = client.TransactionReceipt(ctx, txHash)
+		if err != nil && !errors.Is(err, ethereum.NotFound) {
+			log.Error("cant get receipt for transaction",
+				"provider", p.name,
+				"hash", txHash.Hex(),
+				"nonce", nonce,
+				"err", err)
+			return
+		}
+		attempt++
+	}
+
+	roundTripLatency := time.Since(roundTripStartedAt)
+
+	metrics.RecordRoundTripLatency(p.name, roundTripLatency)
+	metrics.RecordGasUsed(p.name, receipt.GasUsed)
+
+	log.Info("got transaction receipt",
+		"hash", txHash.Hex(),
+		"nonce", nonce,
+		"roundTripLatency", roundTripLatency,
+		"provider", p.name,
+		"blockNumber", receipt.BlockNumber,
+		"blockHash", receipt.BlockHash,
+		"gasUsed", receipt.GasUsed)
+}
+
+func (p *Provider) createTx(ctx context.Context, client *iclients.InstrumentedEthClient, nonce uint64) (*common.Address, *types.Transaction, error) {
+	var err error
+	if nonce == 0 {
+		nonce, err = client.PendingNonceAt(ctx, p.walletConfig.Address)
+		if err != nil {
+			log.Error("cant get nonce",
+				"provider", p.name,
+				"nonce", nonce,
+				"err", err)
+			return nil, nil, err
+		}
+	}
+
+	gasTipCap, err := client.SuggestGasTipCap(ctx)
+	if err != nil {
+		log.Error("cant get gas tip cap",
+			"provider", p.name,
+			"err", err)
+		return nil, nil, err
+	}
+
+	// adjust gas tip cap by 110%
+	const GasTipCapAdjustmentMultiplier = 110
+	const GasTipCapAdjustmentDivisor = 100
+	gasTipCap = new(big.Int).Mul(gasTipCap, big.NewInt(GasTipCapAdjustmentMultiplier))
+	gasTipCap = new(big.Int).Div(gasTipCap, big.NewInt(GasTipCapAdjustmentDivisor))
+
+	head, err := client.HeaderByNumber(ctx, nil)
+	if err != nil {
+		log.Error("cant get base fee from head",
+			"provider", p.name,
+			"err", err)
+		return nil, nil, err
+	}
+	baseFee := head.BaseFee
+
+	gasFeeCap := new(big.Int).Add(
+		gasTipCap,
+		new(big.Int).Mul(baseFee, big.NewInt(2)))
+
+	addr := common.HexToAddress(p.walletConfig.Address)
+	var data []byte
+	dynamicTx := &types.DynamicFeeTx{
+		ChainID:   &p.walletConfig.ChainID,
+		Nonce:     nonce,
+		GasFeeCap: gasFeeCap,
+		GasTipCap: gasTipCap,
+		To:        &addr,
+		Value:     &p.walletConfig.TxValue,
+		Data:      data,
+	}
+
+	gas, err := client.EstimateGas(ctx, ethereum.CallMsg{
+		From:      addr,
+		To:        &addr,
+		GasFeeCap: gasFeeCap,
+		GasTipCap: gasTipCap,
+		Data:      dynamicTx.Data,
+		Value:     dynamicTx.Value,
+	})
+	if err != nil {
+		log.Error("cant estimate gas",
+			"provider", p.name,
+			"err", err)
+		return nil, nil, err
+	}
+	dynamicTx.Gas = gas
+	tx := types.NewTx(dynamicTx)
+
+	log.Info("tx created",
+		"provider", p.name,
+		"from", addr,
+		"to", dynamicTx.To,
+		"nonce", dynamicTx.Nonce,
+		"value", dynamicTx.Value,
+		"gas", dynamicTx.Gas,
+		"gasTipCap", dynamicTx.GasTipCap,
+		"gasFeeCap", dynamicTx.GasFeeCap,
+	)
+
+	return &addr, tx, nil
+}
+
+func (p *Provider) sign(ctx context.Context, from *common.Address, tx *types.Transaction) (*types.Transaction, error) {
+	if p.walletConfig.SignerMethod == "static" {
+		log.Debug("using static signer")
+		privateKey, err := crypto.HexToECDSA(p.walletConfig.PrivateKey)
+		if err != nil {
+			log.Error("failed to parse private key", "err", err)
+			return nil, err
+		}
+		return types.SignTx(tx, types.LatestSignerForChainID(&p.walletConfig.ChainID), privateKey)
+	} else if p.walletConfig.SignerMethod == "signer" {
+		tlsConfig := tls.CLIConfig{
+			TLSCaCert: p.signerConfig.TLSCaCert,
+			TLSCert:   p.signerConfig.TLSCert,
+			TLSKey:    p.signerConfig.TLSKey,
+		}
+		client, err := iclients.NewSignerClient(p.name, log.Root(), p.signerConfig.URL, tlsConfig)
+		if err != nil || client == nil {
+			log.Error("failed to create signer client", "err", err)
+		}
+
+		if client == nil {
+			return nil, errors.New("could not initialize signer client")
+		}
+
+		signedTx, err := client.SignTransaction(ctx, &p.walletConfig.ChainID, from, tx)
+		if err != nil {
+			return nil, err
+		}
+
+		return signedTx, nil
+	} else {
+		return nil, errors.New("invalid signer method")
+	}
+}
--- a/op-ufm/pkg/provider/tx_pool.go
+++ b/op-ufm/pkg/provider/tx_pool.go
@ -0,0 +1,40 @@
+package provider
+
+import (
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// TransactionPool is used locally to share transactions between providers under the same pool
+type TransactionPool map[string]*NetworkTransactionPool
+
+// NetworkTransactionPool is used locally to share transactions between providers under the same network
+type NetworkTransactionPool struct {
+	M            sync.Mutex
+	Transactions map[string]*TransactionState
+	Expected     int
+
+	// Last time a transaction was sent
+	LastSend time.Time
+	// Prevents concurrent transaction send
+	ExclusiveSend sync.Mutex
+}
+
+type TransactionState struct {
+	// Transaction hash
+	Hash common.Hash
+
+	// Mutex
+	M sync.Mutex
+
+	SentAt         time.Time
+	ProviderSource string
+
+	FirstSeen time.Time
+
+	// Map of providers that have seen this transaction, and when
+	// Once all providers have seen the transaction it is removed from the pool
+	SeenBy map[string]time.Time
+}
--- a/op-ufm/pkg/service/healthz_server.go
+++ b/op-ufm/pkg/service/healthz_server.go
@ -0,0 +1,42 @@
+package service
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/rs/cors"
+
+	"github.com/ethereum/go-ethereum/log"
+)
+
+type HealthzServer struct {
+	ctx    context.Context
+	server *http.Server
+}
+
+func (h *HealthzServer) Start(ctx context.Context, addr string) error {
+	hdlr := mux.NewRouter()
+	hdlr.HandleFunc("/healthz", h.Handle).Methods("GET")
+	c := cors.New(cors.Options{
+		AllowedOrigins: []string{"*"},
+	})
+	server := &http.Server{
+		Handler: c.Handler(hdlr),
+		Addr:    addr,
+	}
+	h.server = server
+	h.ctx = ctx
+	return h.server.ListenAndServe()
+}
+
+func (h *HealthzServer) Shutdown() error {
+	return h.server.Shutdown(h.ctx)
+}
+
+func (h *HealthzServer) Handle(w http.ResponseWriter, r *http.Request) {
+	_, err := w.Write([]byte("OK"))
+	if err != nil {
+		log.Error("error handling HealthzServer response")
+	}
+}
--- a/op-ufm/pkg/service/metrics_server.go
+++ b/op-ufm/pkg/service/metrics_server.go
@ -0,0 +1,27 @@
+package service
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+type MetricsServer struct {
+	ctx    context.Context
+	server *http.Server
+}
+
+func (m *MetricsServer) Start(ctx context.Context, addr string) error {
+	server := &http.Server{
+		Handler: promhttp.Handler(),
+		Addr:    addr,
+	}
+	m.server = server
+	m.ctx = ctx
+	return m.server.ListenAndServe()
+}
+
+func (m *MetricsServer) Shutdown() error {
+	return m.server.Shutdown(m.ctx)
+}
--- a/op-ufm/pkg/service/service.go
+++ b/op-ufm/pkg/service/service.go
@ -0,0 +1,111 @@
+package service
+
+import (
+	"context"
+	"net"
+
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/config"
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/metrics"
+	"github.com/ethereum-optimism/optimism/op-ufm/pkg/provider"
+
+	"github.com/ethereum/go-ethereum/log"
+)
+
+type Service struct {
+	Config    *config.Config
+	Healthz   *HealthzServer
+	Metrics   *MetricsServer
+	Providers map[string]*provider.Provider
+}
+
+func New(cfg *config.Config) *Service {
+	s := &Service{
+		Config:    cfg,
+		Healthz:   &HealthzServer{},
+		Metrics:   &MetricsServer{},
+		Providers: make(map[string]*provider.Provider, len(cfg.Providers)),
+	}
+	return s
+}
+
+func (s *Service) Start(ctx context.Context) {
+	log.Info("service starting")
+	if s.Config.Healthz.Enabled {
+		addr := net.JoinHostPort(s.Config.Healthz.Host, s.Config.Healthz.Port)
+		log.Info("starting healthz server",
+			"addr", addr)
+		go func() {
+			if err := s.Healthz.Start(ctx, addr); err != nil {
+				log.Error("error starting healthz server",
+					"err", err)
+			}
+		}()
+	}
+
+	metrics.Debug = s.Config.Metrics.Debug
+	if s.Config.Metrics.Enabled {
+		addr := net.JoinHostPort(s.Config.Metrics.Host, s.Config.Metrics.Port)
+		log.Info("starting metrics server",
+			"addr", addr)
+		go func() {
+			if err := s.Metrics.Start(ctx, addr); err != nil {
+				log.Error("error starting metrics server",
+					"err", err)
+			}
+		}()
+	}
+
+	// map networks to its providers
+	networks := make(map[string][]string)
+	for name, providerConfig := range s.Config.Providers {
+		networks[providerConfig.Network] = append(networks[providerConfig.Network], name)
+	}
+
+	txpool := &provider.TransactionPool{}
+	for name, providers := range networks {
+		if len(providers) == 1 {
+			log.Warn("can't measure first seen for network, please another provider",
+				"network", name)
+		}
+		(*txpool)[name] = &provider.NetworkTransactionPool{}
+		(*txpool)[name].Transactions = make(map[string]*provider.TransactionState)
+		// set expected number of providers for this network
+		// -1 since we don't wait for acking from the same provider
+		(*txpool)[name].Expected = len(providers) - 1
+	}
+
+	for name, providerConfig := range s.Config.Providers {
+		s.Providers[name] = provider.New(name,
+			providerConfig,
+			&s.Config.Signer,
+			s.Config.Wallets[providerConfig.Wallet],
+			(*txpool)[providerConfig.Network])
+		s.Providers[name].Start(ctx)
+		log.Info("provider started",
+			"provider", name)
+	}
+
+	log.Info("service started")
+}
+
+func (s *Service) Shutdown() {
+	log.Info("service shutting down")
+	if s.Config.Healthz.Enabled {
+		if err := s.Healthz.Shutdown(); err != nil {
+			log.Error("Error shutting down healthz server", err)
+		}
+		log.Info("healthz stopped")
+	}
+	if s.Config.Metrics.Enabled {
+		if err := s.Metrics.Shutdown(); err != nil {
+			log.Error("Error shutting down metrics server", err)
+		}
+		log.Info("metrics stopped")
+	}
+	for name, provider := range s.Providers {
+		provider.Shutdown()
+		log.Info("provider stopped",
+			"provider", name)
+	}
+	log.Info("service stopped")
+}
--- a/op-ufm/tools/kmstool/main.go
+++ b/op-ufm/tools/kmstool/main.go
@ -0,0 +1,72 @@
+package main
+
+import (
+	"context"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"encoding/pem"
+	"fmt"
+	"os"
+
+	kms "cloud.google.com/go/kms/apiv1"
+	"cloud.google.com/go/kms/apiv1/kmspb"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
+)
+
+func main() {
+	println("kmstool - usage: kmstool <key>")
+
+	if len(os.Args) < 2 {
+		panic("missing <key>")
+	}
+
+	keyName := os.Args[1]
+
+	ctx := context.Background()
+	client, err := kms.NewKeyManagementClient(ctx)
+	if err != nil {
+		panic(fmt.Errorf("failed to create kms client: %w", err))
+	}
+	defer client.Close()
+
+	addr, err := resolveAddr(ctx, client, keyName)
+	if err != nil {
+		panic(fmt.Errorf("failed to retrieve the key: %w", err))
+	}
+	fmt.Printf("ethereum addr: %s", addr)
+	println()
+	println()
+}
+
+func resolveAddr(ctx context.Context, client *kms.KeyManagementClient, keyName string) (common.Address, error) {
+	resp, err := client.GetPublicKey(ctx, &kmspb.GetPublicKeyRequest{Name: keyName})
+	if err != nil {
+		return common.Address{}, fmt.Errorf("google kms public key %q lookup: %w", keyName, err)
+	}
+	keyPem := resp.Pem
+
+	block, _ := pem.Decode([]byte(keyPem))
+	if block == nil {
+		return common.Address{}, fmt.Errorf("google kms public key %q pem empty: %.130q", keyName, keyPem)
+	}
+
+	var info struct {
+		AlgID pkix.AlgorithmIdentifier
+		Key   asn1.BitString
+	}
+	_, err = asn1.Unmarshal(block.Bytes, &info)
+	if err != nil {
+		return common.Address{}, fmt.Errorf("google kms public key %q pem block %q: %w", keyName, block.Type, err)
+	}
+
+	return pubKeyAddr(info.Key.Bytes), nil
+}
+
+// PubKeyAddr returns the Ethereum address for the (uncompressed) key bytes.
+func pubKeyAddr(bytes []byte) common.Address {
+	digest := crypto.Keccak256(bytes[1:])
+	var addr common.Address
+	copy(addr[:], digest[12:])
+	return addr
+}