From 392013fa25028d8244a65f8506731dcadd1281b5 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Mon, 27 Feb 2023 16:45:45 -0300
Subject: [PATCH] sdk package with higher-level functions.

---
 helpers.go   |  1 -
 sdk/input.go | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+), 1 deletion(-)
 delete mode 100644 helpers.go
 create mode 100644 sdk/input.go

diff --git a/helpers.go b/helpers.go
deleted file mode 100644
index b8f6fcf..0000000
--- a/helpers.go
+++ /dev/null
@@ -1 +0,0 @@
-package nostr
diff --git a/sdk/input.go b/sdk/input.go
new file mode 100644
index 0000000..3dddebf
--- /dev/null
+++ b/sdk/input.go
@@ -0,0 +1,62 @@
+package sdk
+
+import (
+	"encoding/hex"
+
+	"github.com/nbd-wtf/go-nostr"
+	"github.com/nbd-wtf/go-nostr/nip05"
+	"github.com/nbd-wtf/go-nostr/nip19"
+)
+
+// InputToProfile turns any npub/nprofile/hex/nip05 input into a ProfilePointer (or nil)
+func InputToProfile(input string) *nostr.ProfilePointer {
+	// handle if it is a hex string
+	if len(input) == 64 {
+		if _, err := hex.DecodeString(input); err == nil {
+			return &nostr.ProfilePointer{PublicKey: input}
+		}
+	}
+
+	// handle nip19 codes, if that's the case
+	prefix, data, _ := nip19.Decode(input)
+	switch prefix {
+	case "npub":
+		input = data.(string)
+		return &nostr.ProfilePointer{PublicKey: input}
+	case "nprofile":
+		pp := data.(nostr.ProfilePointer)
+		return &pp
+	}
+
+	// handle nip05 ids, if that's the case
+	pp := nip05.QueryIdentifier(input)
+	if pp != nil {
+		return pp
+	}
+
+	return nil
+}
+
+// InputToEventPointer turns any note/nevent/hex input into a EventPointer (or nil)
+func InputToEventPointer(input string) *nostr.EventPointer {
+	// handle if it is a hex string
+	if len(input) == 64 {
+		if _, err := hex.DecodeString(input); err == nil {
+			return &nostr.EventPointer{ID: input}
+		}
+	}
+
+	// handle nip19 codes, if that's the case
+	prefix, data, _ := nip19.Decode(input)
+	switch prefix {
+	case "note":
+		input = data.(string)
+		return &nostr.EventPointer{ID: input}
+	case "nevent":
+		ep := data.(nostr.EventPointer)
+		return &ep
+	}
+
+	// handle nip05 ids, if that's the case
+	return nil
+}