nip13: move Generate() to deprecated.go

nip13/deprecated.go

@@ -0,0 +1,32 @@
+package nip13
+
+import (
+	"strconv"
+	"time"
+
+	"github.com/nbd-wtf/go-nostr"
+)
+
+// Deprecated: use DoWork()
+func Generate(event *nostr.Event, targetDifficulty int, timeout time.Duration) (*nostr.Event, error) {
+	if event.PubKey == "" {
+		return nil, ErrMissingPubKey
+	}
+
+	tag := nostr.Tag{"nonce", "", strconv.Itoa(targetDifficulty)}
+	event.Tags = append(event.Tags, tag)
+	var nonce uint64
+	start := time.Now()
+	for {
+		nonce++
+		tag[1] = strconv.FormatUint(nonce, 10)
+		if Difficulty(event.GetID()) >= targetDifficulty {
+			return event, nil
+		}
+		// benchmarks show one iteration is approx 3000ns on i7-8565U @ 1.8GHz.
+		// so, check every 30ms; arbitrary
+		if nonce%10000 == 0 && time.Since(start) > timeout {
+			return nil, ErrGenerateTimeout
+		}
+	}
+}