fix: proper validation for DNS name in remote addrs

Author: ironman0x7b2

config/node.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/asaskevich/govalidator"
 	"github.com/sentinel-official/sentinel-go-sdk/libs/netip"
 	"github.com/sentinel-official/sentinel-go-sdk/types"
 	"github.com/sentinel-official/sentinel-go-sdk/utils"
@@ -372,5 +373,10 @@ func validateRemoteAddr(addr string) error {
 		return errors.New("addr is neither IPv4 nor IPv6")
 	}
 
-	return nil
+	// Validate the DNS name format.
+	if govalidator.IsDNSName(addr) {
+		return nil
+	}
+
+	return fmt.Errorf("unsupported addr %q", addr)
 }

go.mod

@@ -4,6 +4,7 @@ go 1.24.6
 
 require (
 	cosmossdk.io/math v1.5.3
+	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2
 	github.com/cosmos/cosmos-sdk v0.47.17
 	github.com/gin-contrib/cors v1.7.6
 	github.com/gin-gonic/gin v1.11.0

go.sum

@@ -66,6 +66,8 @@ github.com/apernet/quic-go v0.48.2-0.20241104191913-cb103fcecfe7 h1:zO38yBOvQ1dL
 github.com/apernet/quic-go v0.48.2-0.20241104191913-cb103fcecfe7/go.mod h1:LoSUY2chVqNQCDyi4IZGqPpXLy1FuCkE37PKwtJvNGg=
 github.com/armon/go-metrics v0.4.1 h1:hR91U9KYmb6bLBYLQjyM+3j+rcd/UhE+G78SFnF8gJA=
 github.com/armon/go-metrics v0.4.1/go.mod h1:E6amYzXo6aW1tqzoZGT755KkbgrJsSdpwZ+3JqfkOG4=
+github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
+github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/avast/retry-go/v4 v4.7.0 h1:yjDs35SlGvKwRNSykujfjdMxMhMQQM0TnIjJaHB+Zio=
 github.com/avast/retry-go/v4 v4.7.0/go.mod h1:ZMPDa3sY2bKgpLtap9JRUgk2yTAba7cgiFhqxY2Sg6Q=
 github.com/aws/aws-sdk-go v1.44.203 h1:pcsP805b9acL3wUqa4JR2vg1k2wnItkDYNvfmcy6F+U=