refactor

cmd/ots/create.go

@@ -0,0 +1,130 @@
+package main
+
+import (
+	"context"
+	"crypto/sha256"
+	"fmt"
+	"log/slog"
+	"os"
+	"strings"
+	"time"
+
+	"git.intruders.space/public/opentimestamps"
+	"git.intruders.space/public/opentimestamps/ots"
+	"github.com/spf13/cobra"
+)
+
+// Default calendar servers
+var defaultCalendars = []string{
+	"https://alice.btc.calendar.opentimestamps.org",
+	"https://bob.btc.calendar.opentimestamps.org",
+	"https://finney.calendar.eternitywall.com",
+}
+
+var (
+	// Create command flags
+	createOutput       string
+	createCalendarsStr string
+	createTimeout      time.Duration
+)
+
+// createCmd represents the create command
+var createCmd = &cobra.Command{
+	Use:   "create [flags] <file>",
+	Short: "Create a timestamp for a file",
+	Long: `Create a timestamp for a file by submitting its digest to OpenTimestamps calendar servers.
+The resulting timestamp is saved to a .ots file, which can later be verified or upgraded.`,
+	Args: cobra.ExactArgs(1),
+	Run:  runCreateCmd,
+}
+
+func init() {
+	// Local flags for the create command
+	createCmd.Flags().StringVarP(&createOutput, "output", "o", "", "Output filename (default: input filename with .ots extension)")
+	createCmd.Flags().StringVar(&createCalendarsStr, "calendar", strings.Join(defaultCalendars, ","), "Comma-separated list of calendar server URLs")
+	createCmd.Flags().DurationVar(&createTimeout, "timeout", 30*time.Second, "Timeout for calendar server connections")
+}
+
+func runCreateCmd(cmd *cobra.Command, args []string) {
+	inputPath := args[0]
+
+	// Determine output file path
+	outputPath := createOutput
+	if outputPath == "" {
+		outputPath = inputPath + ".ots"
+	}
+
+	// Parse calendar servers
+	calendars := strings.Split(createCalendarsStr, ",")
+	if len(calendars) == 0 {
+		calendars = defaultCalendars
+	}
+
+	// Read the input file
+	fileData, err := os.ReadFile(inputPath)
+	if err != nil {
+		slog.Error("Failed to read input file", "file", inputPath, "error", err)
+		os.Exit(1)
+	}
+
+	// Compute the file digest
+	digest := sha256.Sum256(fileData)
+	slog.Info("Computed file digest", "digest", fmt.Sprintf("%x", digest))
+
+	// Create context with timeout
+	ctx, cancel := context.WithTimeout(context.Background(), createTimeout)
+	defer cancel()
+
+	// Create timestamps using all calendar servers
+	var sequences []ots.Sequence
+	var errors []string
+
+	for _, calendarURL := range calendars {
+		calendarURL = strings.TrimSpace(calendarURL)
+		if calendarURL == "" {
+			continue
+		}
+
+		slog.Info("Submitting to calendar", "url", calendarURL)
+		seq, err := opentimestamps.Stamp(ctx, calendarURL, digest)
+		if err != nil {
+			slog.Warn("Calendar submission failed", "url", calendarURL, "error", err)
+			errors = append(errors, fmt.Sprintf("%s: %v", calendarURL, err))
+			continue
+		}
+
+		sequences = append(sequences, seq)
+		slog.Info("Calendar submission successful", "url", calendarURL)
+	}
+
+	if len(sequences) == 0 {
+		slog.Error("All calendar submissions failed", "errors", errors)
+		os.Exit(1)
+	}
+
+	// Create the timestamp file
+	file := &ots.File{
+		Digest:    digest[:],
+		Sequences: sequences,
+	}
+
+	// Write the OTS file
+	otsData := file.SerializeToFile()
+	err = os.WriteFile(outputPath, otsData, 0644)
+	if err != nil {
+		slog.Error("Failed to write OTS file", "file", outputPath, "error", err)
+		os.Exit(1)
+	}
+
+	slog.Info("Timestamp file created successfully",
+		"file", outputPath,
+		"timestamps", len(sequences),
+		"size", len(otsData))
+
+	// Print human-readable representation
+	slog.Debug("Timestamp details", "info", file.Human(false))
+
+	slog.Info("Timestamp creation complete",
+		"status", "pending",
+		"note", "Use 'ots upgrade' to upgrade this timestamp when it's confirmed in the Bitcoin blockchain")
+}