feat(loadgen): adding loadgen binary

.github/workflows/ci.yml

@@ -81,6 +81,7 @@ jobs:
         [
           {"name": "ev-node-evm", "dockerfile": "apps/evm/Dockerfile"},
           {"name": "ev-node-grpc", "dockerfile": "apps/grpc/Dockerfile"},
+          {"name": "ev-node-loadgen", "dockerfile": "apps/loadgen/Dockerfile"},
           {"name": "ev-node-testapp", "dockerfile": "apps/testapp/Dockerfile"}
         ]
 

.gitignore

@@ -26,9 +26,11 @@ docs/.vitepress/cache
 *.log
 *.tgz
 .idea
+.junie
 .temp
 .vite_opt_cache
 .vscode
 .gocache
 .gomodcache
 /.cache
+*.diff

.just/build.just

@@ -28,6 +28,8 @@ build-all:
     @cd apps/evm && go build -ldflags "{{ ldflags }}" -o {{ build_dir }}/evm .
     @echo "--> Building grpc"
     @cd apps/grpc && go build -ldflags "{{ ldflags }}" -o {{ build_dir }}/evgrpc .
+    @echo "--> Building loadgen"
+    @cd apps/loadgen && go build -ldflags "{{ ldflags }}" -o {{ build_dir }}/ev-loadgen .
     @echo "--> Building local-da"
     @cd tools/local-da && go build -ldflags "{{ ldflags }}" -o {{ build_dir }}/local-da .
     @echo "--> All ev-node binaries built!"

.just/loadgen.just

@@ -0,0 +1,14 @@
+# Build ev-loadgen binary
+[group('loadgen')]
+build-loadgen:
+    @echo "--> Building ev-loadgen"
+    @mkdir -p {{ build_dir }}
+    @cd apps/loadgen && go build -o {{ build_dir }}/ev-loadgen .
+    @echo "    Check the binary with: {{ build_dir }}/ev-loadgen"
+
+# Build ev-loadgen Docker image
+[group('loadgen')]
+docker-build-loadgen:
+    @echo "--> Building ev-loadgen Docker image"
+    @docker build -f apps/loadgen/Dockerfile -t ev-loadgen:dev .
+    @echo "--> Docker image built: ev-loadgen:dev"

apps/evm/go.mod

@@ -118,7 +118,7 @@ require (
 	github.com/ipld/go-ipld-prime v0.23.0 // indirect
 	github.com/jackpal/go-nat-pmp v1.0.2 // indirect
 	github.com/jbenet/go-temp-err-catcher v0.1.0 // indirect
-	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/compress v1.18.5 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/koron/go-ssdp v0.0.6 // indirect
 	github.com/libp2p/go-buffer-pool v0.1.0 // indirect

apps/evm/go.sum

@@ -480,8 +480,8 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
-github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
+github.com/klauspost/compress v1.18.5 h1:/h1gH5Ce+VWNLSWqPzOVn6XBO+vJbCNGvjoaGBFW2IE=
+github.com/klauspost/compress v1.18.5/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=
 github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
 github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=

apps/grpc/go.mod

@@ -100,7 +100,7 @@ require (
 	github.com/ipld/go-ipld-prime v0.23.0 // indirect
 	github.com/jackpal/go-nat-pmp v1.0.2 // indirect
 	github.com/jbenet/go-temp-err-catcher v0.1.0 // indirect
-	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/compress v1.18.5 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/koron/go-ssdp v0.0.6 // indirect
 	github.com/libp2p/go-buffer-pool v0.1.0 // indirect

apps/grpc/go.sum

@@ -413,8 +413,8 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
-github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
+github.com/klauspost/compress v1.18.5 h1:/h1gH5Ce+VWNLSWqPzOVn6XBO+vJbCNGvjoaGBFW2IE=
+github.com/klauspost/compress v1.18.5/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=
 github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
 github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=

apps/loadgen/Dockerfile

@@ -0,0 +1,28 @@
+FROM golang:1.25-alpine AS build-env
+
+WORKDIR /src
+
+COPY apps/loadgen/go.mod apps/loadgen/go.sum ./
+RUN go mod download
+
+COPY apps/loadgen/ .
+RUN CGO_ENABLED=0 GOOS=linux go build -o ev-loadgen .
+
+FROM alpine:3.22.2
+
+ENV TZ=UTC
+
+#hadolint ignore=DL3018
+RUN apk --no-cache add ca-certificates curl tzdata
+
+RUN addgroup -S ev && adduser -S ev -G ev
+
+WORKDIR /home/ev
+
+COPY --from=build-env /src/ev-loadgen /usr/bin/ev-loadgen
+COPY apps/loadgen/matrices/baseline.json /home/ev/baseline.json
+COPY apps/loadgen/matrices/burst.json /home/ev/burst.json
+
+USER ev
+
+CMD ["ev-loadgen", "start"]

apps/loadgen/README.md

@@ -0,0 +1,129 @@
+# loadgen
+
+Standalone load generator for ev-node stress testing. Talks to a [spamoor-daemon](https://github.com/ethpandaops/spamoor) sidecar via HTTP API. Runs an in-process scheduler with configurable regular and burst workloads.
+
+## Architecture
+
+```text
+ev-loadgen (this binary)  -->  spamoor-daemon  -->  ev-reth RPC
+        |                              |
+   reads matrix JSON            manages wallets,
+   creates/polls spammers       signs & sends txs
+```
+
+- **spamoor-daemon** needs: a funded private key + ev-reth RPC URL
+- **ev-loadgen** needs: spamoor-daemon API URL + matrix JSON files
+
+## Commands
+
+```text
+ev-loadgen start                         # run continuous scheduler (regular + burst)
+ev-loadgen check                         # send 1 tx to verify spamoor → ev-reth connectivity
+ev-loadgen run <matrix.json>             # one-shot: run a custom matrix file
+```
+
+### start flags
+
+| Flag | Env | Default | Description |
+|------|-----|---------|-------------|
+| `--tx-per-day` | `BENCH_TX_PER_DAY` | `1000000` | sustained txs/day |
+| `--interval` | `BENCH_INTERVAL` | `1h` | regular workload frequency |
+| `--burst-tx-count` | `BENCH_BURST_TX_COUNT` | `500000` | txs per burst |
+| `--burst-per-day` | `BENCH_BURST_PER_DAY` | `2` | bursts per day, randomly spaced |
+| `--regular-matrix` | `BENCH_REGULAR_MATRIX` | `/home/ev/baseline.json` | path to regular matrix JSON |
+| `--burst-matrix` | `BENCH_BURST_MATRIX` | `/home/ev/burst.json` | path to burst matrix JSON |
+
+Global flag: `--spamoor-url` (or `BENCH_SPAMOOR_URL` env, default `http://spamoor-daemon:8080`)
+
+### Scheduling
+
+- **Regular**: fires immediately at startup, then repeats at `--interval`. Per-run tx count = `tx-per-day / (24h / interval)`. Overrides each matrix entry's `BENCH_COUNT_PER_SPAMMER`.
+- **Burst**: at startup + each midnight UTC, generates N random times across the day. Each burst overrides `BENCH_COUNT_PER_SPAMMER` = `burst-tx-count / NumSpammers`.
+- **Serialization**: a mutex prevents concurrent spamoor access. If burst fires during regular (or vice versa), it waits for the lock.
+
+## Quick Start
+
+### 1. Start spamoor-daemon
+
+```sh
+docker run -d --name spamoor -p 8080:8080 \
+  ethpandaops/spamoor:latest /app/spamoor-daemon \
+  --privkey=<funded-private-key> \
+  --rpchost=http://<ev-reth-host>:8545 \
+  --port=8080 --startup-delay=0
+```
+
+### 2. Run loadgen
+
+```sh
+# build
+cd apps/loadgen && go build -o ev-loadgen .
+
+# run with defaults (~1M tx/day, 2 bursts/day)
+./ev-loadgen start --spamoor-url=http://localhost:8080
+
+# custom config
+./ev-loadgen start \
+  --spamoor-url=http://localhost:8080 \
+  --tx-per-day=500000 \
+  --interval=30m \
+  --burst-tx-count=100000 \
+  --burst-per-day=4
+```
+
+### Docker Compose
+
+Spins up both spamoor-daemon and loadgen together:
+
+```sh
+export BENCH_PRIVATE_KEY=<funded-private-key>
+export BENCH_ETH_RPC_URL=http://<ev-reth-host>:8545
+docker compose -f apps/loadgen/docker-compose.yml up
+```
+
+## Matrix Format
+
+Each entry specifies a spamoor scenario, tx counts, and optional probability:
+
+```json
+{
+  "entries": [
+    {
+      "test_name": "EOATransfer",
+      "scenario": "eoatx",
+      "timeout": "15m",
+      "env": {
+        "BENCH_NUM_SPAMMERS": "4",
+        "BENCH_COUNT_PER_SPAMMER": "10500",
+        "BENCH_THROUGHPUT": "200",
+        "BENCH_MAX_PENDING": "50000",
+        "BENCH_MAX_WALLETS": "200",
+        "BENCH_BASE_FEE": "500",
+        "BENCH_TIP_FEE": "50"
+      }
+    }
+  ]
+}
+```
+
+| Field | Description |
+|---|---|
+| `scenario` | spamoor scenario name (`eoatx`, `gasburnertx`, `erc20tx`, `uniswap-swaps`, etc.) |
+| `probability` | 0.0–1.0, chance of running per invocation (omit = always run) |
+| `timeout` | max duration per entry (default `15m`) |
+
+When using `start`, the `BENCH_COUNT_PER_SPAMMER` value in the matrix is overridden by the computed per-run count. The matrix value is still used by the `run` command.
+
+## Build
+
+```sh
+# binary
+cd apps/loadgen && go build -o ev-loadgen .
+
+# docker image
+docker build -f apps/loadgen/Dockerfile -t ev-loadgen:dev .
+
+# via just
+just build-loadgen
+just docker-build-loadgen
+```

apps/loadgen/cmd/check.go

@@ -0,0 +1,25 @@
+package cmd
+
+import (
+	"time"
+
+	"github.com/evstack/ev-node/apps/loadgen/internal"
+	"github.com/spf13/cobra"
+)
+
+func newCheckCmd() *cobra.Command {
+	var timeout time.Duration
+
+	cmd := &cobra.Command{
+		Use:   "check",
+		Short: "verify connectivity by sending a single eoatx through spamoor to ev-reth",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return internal.RunCheck(cmd.Context(), resolveSpamoorURL(), timeout)
+		},
+	}
+
+	cmd.Flags().DurationVar(&timeout, "timeout", 60*time.Second, "max time to wait for tx")
+
+	return cmd
+}

apps/loadgen/cmd/flags_test.go

@@ -0,0 +1,29 @@
+package cmd
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestStartFlags(t *testing.T) {
+	startCmd := newStartCmd()
+
+	err := startCmd.ParseFlags([]string{"--regular-matrix", "custom.json"})
+	require.NoError(t, err)
+
+	// Since we can't easily access the cfg inside newStartCmd's closure from here
+	// without refactoring, we'll check if the flag is registered correctly.
+	flag := startCmd.Flags().Lookup("regular-matrix")
+	require.NotNil(t, flag)
+	require.Equal(t, "custom.json", flag.Value.String())
+}
+
+func TestRunArgs(t *testing.T) {
+	runCmd := newRunCmd()
+	err := runCmd.Args(runCmd, []string{"matrix.json"})
+	require.NoError(t, err)
+
+	err = runCmd.Args(runCmd, []string{})
+	require.Error(t, err)
+}

apps/loadgen/cmd/root.go

@@ -0,0 +1,29 @@
+package cmd
+
+import (
+	"github.com/evstack/ev-node/apps/loadgen/internal"
+	"github.com/spf13/cobra"
+)
+
+var spamoorFlag string
+
+// NewRootCmd returns the top-level cobra command for ev-loadgen.
+func NewRootCmd() *cobra.Command {
+	rootCmd := &cobra.Command{
+		Use:   "ev-loadgen",
+		Short: "benchmark runner for ev-node stress testing via spamoor",
+	}
+
+	rootCmd.PersistentFlags().StringVar(&spamoorFlag, "spamoor-url", "", "spamoor-daemon API URL (env: BENCH_SPAMOOR_URL)")
+
+	rootCmd.AddCommand(newRunCmd(), newStartCmd(), newCheckCmd())
+
+	return rootCmd
+}
+
+func resolveSpamoorURL() string {
+	if spamoorFlag != "" {
+		return spamoorFlag
+	}
+	return internal.SpamoorURL()
+}

apps/loadgen/cmd/run.go

@@ -0,0 +1,17 @@
+package cmd
+
+import (
+	"github.com/evstack/ev-node/apps/loadgen/internal"
+	"github.com/spf13/cobra"
+)
+
+func newRunCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "run <matrix.json>",
+		Short: "run benchmarks from a matrix JSON file",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return internal.ExecuteMatrixFromFile(cmd.Context(), args[0], internal.NewSpamoorClient(resolveSpamoorURL()))
+		},
+	}
+}