Add cmd/gots-verify

Allows verification of created timestamps

cmd/gots-verify/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	"github.com/BlockchainSource/go-opentimestamps/opentimestamps"
+	"github.com/BlockchainSource/go-opentimestamps/opentimestamps/client"
+	"github.com/btcsuite/btcrpcclient"
+)
+
+func newBtcConn(host, user, pass string) (*btcrpcclient.Client, error) {
+	connCfg := &btcrpcclient.ConnConfig{
+		Host:         host,
+		User:         user,
+		Pass:         pass,
+		HTTPPostMode: true,
+		DisableTLS:   true,
+	}
+	return btcrpcclient.New(connCfg, nil)
+}
+
+var (
+	flagBTCHost = flag.String("btc-host", "localhost:8332", "bitcoin-rpc hostname")
+	flagBTCUser = flag.String("btc-user", "bitcoin", "bitcoin-rpc username")
+	flagBTCPass = flag.String("btc-pass", "bitcoin", "bitcoin-rpc password")
+)
+
+func main() {
+	flag.Parse()
+	path := flag.Arg(0)
+	dts, err := opentimestamps.NewDetachedTimestampFromPath(path)
+	if err != nil {
+		log.Fatalf("error reading %s: %v", path, err)
+	}
+
+	btcConn, err := newBtcConn(*flagBTCHost, *flagBTCUser, *flagBTCPass)
+	if err != nil {
+		log.Fatalf("error creating btc connection: %v", err)
+	}
+
+	verifier := client.NewBitcoinAttestationVerifier(btcConn)
+
+	ts, err := verifier.Verify(dts.Timestamp)
+	if err != nil {
+		log.Fatalf("error verifying timestamp: %v", err)
+	}
+	if ts == nil {
+		fmt.Printf("no bitcoin-verifiable timestamps found\n")
+	}
+	fmt.Printf("attested time: %v\n", ts)
+}