feat: add rainyun applicant

internal/pkg/core/applicant/acme-dns-01/lego-providers/rainyun/rainyun.go

@@ -0,0 +1,37 @@
+package rainyun
+
+import (
+	"errors"
+	"time"
+
+	"github.com/go-acme/lego/v4/challenge"
+	"github.com/go-acme/lego/v4/providers/dns/rainyun"
+)
+
+type RainYunApplicantConfig struct {
+	ApiKey                string `json:"apiKey"`
+	DnsPropagationTimeout int32  `json:"dnsPropagationTimeout,omitempty"`
+	DnsTTL                int32  `json:"dnsTTL,omitempty"`
+}
+
+func NewChallengeProvider(config *RainYunApplicantConfig) (challenge.Provider, error) {
+	if config == nil {
+		return nil, errors.New("config is nil")
+	}
+
+	providerConfig := rainyun.NewDefaultConfig()
+	providerConfig.APIKey = config.ApiKey
+	if config.DnsPropagationTimeout != 0 {
+		providerConfig.PropagationTimeout = time.Duration(config.DnsPropagationTimeout) * time.Second
+	}
+	if config.DnsTTL != 0 {
+		providerConfig.TTL = int(config.DnsTTL)
+	}
+
+	provider, err := rainyun.NewDNSProviderConfig(providerConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	return provider, nil
+}