updated as per the review comments

pkg/plugin/implementation/signvalidator/cmd/plugin.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"context"
+	"errors"
+
+	"github.com/beckn/beckn-onix/pkg/plugin/definition"
+	"github.com/beckn/beckn-onix/pkg/plugin/implementation/signvalidator"
+)
+
+// provider provides instances of Verifier.
+type provider struct{}
+
+// New initializes a new Verifier instance.
+func (vp provider) New(ctx context.Context, config map[string]string) (definition.SignValidator, func() error, error) {
+	if ctx == nil {
+		return nil, nil, errors.New("context cannot be nil")
+	}
+
+	return signvalidator.New(ctx, &signvalidator.Config{})
+}
+
+// Provider is the exported symbol that the plugin manager will look for.
+var Provider = provider{}

pkg/plugin/implementation/signvalidator/cmd/plugin_test.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"context"
+	"testing"
+)
+
+// TestVerifierProviderSuccess tests successful creation of a verifier.
+func TestVerifierProviderSuccess(t *testing.T) {
+	provider := provider{}
+
+	tests := []struct {
+		name   string
+		ctx    context.Context
+		config map[string]string
+	}{
+		{
+			name:   "Successful creation",
+			ctx:    context.Background(),
+			config: map[string]string{},
+		},
+		{
+			name:   "Nil context",
+			ctx:    context.TODO(),
+			config: map[string]string{},
+		},
+		{
+			name:   "Empty config",
+			ctx:    context.Background(),
+			config: map[string]string{},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			verifier, close, err := provider.New(tt.ctx, tt.config)
+
+			if err != nil {
+				t.Fatalf("Expected no error, but got: %v", err)
+			}
+			if verifier == nil {
+				t.Fatal("Expected verifier instance to be non-nil")
+			}
+			if close != nil {
+				if err := close(); err != nil {
+					t.Fatalf("Test %q failed: cleanup function returned an error: %v", tt.name, err)
+				}
+			}
+		})
+	}
+}
+
+// TestVerifierProviderFailure tests cases where verifier creation should fail.
+func TestVerifierProviderFailure(t *testing.T) {
+	provider := provider{}
+
+	tests := []struct {
+		name    string
+		ctx     context.Context
+		config  map[string]string
+		wantErr bool
+	}{
+		{
+			name:    "Nil context failure",
+			ctx:     nil,
+			config:  map[string]string{},
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			verifierInstance, close, err := provider.New(tt.ctx, tt.config)
+
+			if (err != nil) != tt.wantErr {
+				t.Fatalf("Expected error: %v, but got: %v", tt.wantErr, err)
+			}
+			if verifierInstance != nil {
+				t.Fatal("Expected verifier instance to be nil")
+			}
+			if close != nil {
+				if err := close(); err != nil {
+					t.Fatalf("Test %q failed: cleanup function returned an error: %v", tt.name, err)
+				}
+			}
+
+		})
+	}
+}