feat: generate a random private key if not provided

e2e/setup.go

@@ -2,6 +2,7 @@ package e2e
 
 import (
 	"context"
+	"encoding/hex"
 	"fmt"
 	"os"
 	"testing"
@@ -93,10 +94,15 @@ type TestSuite struct {
 func CreateTestSuite(t *testing.T, testCfg *Cfg) (TestSuite, func()) {
 	ctx := context.Background()
 
-	// load signer key from environment
+	// load signer key from environment or generate a random one
 	pk := os.Getenv(privateKey)
 	if pk == "" && !testCfg.UseMemory {
-		t.Fatal("SIGNER_PRIVATE_KEY environment variable not set")
+		t.Logf("SIGNER_PRIVATE_KEY environment variable not set. Generated random private key")
+		randomBytes := make([]byte, 32)
+		if _, err := rand.Read(randomBytes); err != nil {
+			t.Fatalf("Failed to generate random private key: %v", err)
+		}
+		pk = hex.EncodeToString(randomBytes)
 	}
 
 	// load node url from environment

server/config.go

@@ -1,6 +1,8 @@
 package server
 
 import (
+	"crypto/rand"
+	"encoding/hex"
 	"fmt"
 	"runtime"
 	"time"
@@ -179,13 +181,22 @@ func ReadConfig(ctx *cli.Context) Config {
 			Timeout:          ctx.Duration(S3TimeoutFlagName),
 		},
 		ClientConfig: clients.EigenDAClientConfig{
-			RPC:                          ctx.String(EigenDADisperserRPCFlagName),
-			StatusQueryRetryInterval:     ctx.Duration(StatusQueryRetryIntervalFlagName),
-			StatusQueryTimeout:           ctx.Duration(StatusQueryTimeoutFlagName),
-			DisableTLS:                   ctx.Bool(DisableTLSFlagName),
-			ResponseTimeout:              ctx.Duration(ResponseTimeoutFlagName),
-			CustomQuorumIDs:              ctx.UintSlice(CustomQuorumIDsFlagName),
-			SignerPrivateKeyHex:          ctx.String(SignerPrivateKeyHexFlagName),
+			RPC:                      ctx.String(EigenDADisperserRPCFlagName),
+			StatusQueryRetryInterval: ctx.Duration(StatusQueryRetryIntervalFlagName),
+			StatusQueryTimeout:       ctx.Duration(StatusQueryTimeoutFlagName),
+			DisableTLS:               ctx.Bool(DisableTLSFlagName),
+			ResponseTimeout:          ctx.Duration(ResponseTimeoutFlagName),
+			CustomQuorumIDs:          ctx.UintSlice(CustomQuorumIDsFlagName),
+			SignerPrivateKeyHex: func() string {
+				if key := ctx.String(SignerPrivateKeyHexFlagName); key != "" {
+					return key
+				}
+				randomBytes := make([]byte, 32)
+				if _, err := rand.Read(randomBytes); err != nil {
+					panic(fmt.Errorf("failed to generate random private key: %w", err))
+				}
+				return hex.EncodeToString(randomBytes)
+			}(),
 			PutBlobEncodingVersion:       codecs.BlobEncodingVersion(ctx.Uint(PutBlobEncodingVersionFlagName)),
 			DisablePointVerificationMode: ctx.Bool(DisablePointVerificationModeFlagName),
 		},