From 9ba2f614bba2ca6d1683fe598e2879aa00886724 Mon Sep 17 00:00:00 2001
From: niftynei <niftynei@gmail.com>
Date: Wed, 21 Apr 2021 15:45:05 -0500
Subject: [PATCH] psbt-open: method to quickly check if has our input

For dual-funding's accepter plugin, we only want to send
psbts that need to be signed to `signpsbt`; this lets us quickly check
if they're "signable"
---
 common/psbt_open.c | 10 ++++++++++
 common/psbt_open.h |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/common/psbt_open.c b/common/psbt_open.c
index c8b83cce9..eb654a02f 100644
--- a/common/psbt_open.c
+++ b/common/psbt_open.c
@@ -481,3 +481,13 @@ bool psbt_input_is_ours(const struct wally_psbt_input *input)
 					  PSBT_TYPE_INPUT_MARKER, &unused);
 	return !(!result);
 }
+
+bool psbt_has_our_input(const struct wally_psbt *psbt)
+{
+	for (size_t i = 0; i < psbt->num_inputs; i++) {
+		if (psbt_input_is_ours(&psbt->inputs[i]))
+			return true;
+	}
+
+	return false;
+}
diff --git a/common/psbt_open.h b/common/psbt_open.h
index f6bc07eb3..bb7a5e57e 100644
--- a/common/psbt_open.h
+++ b/common/psbt_open.h
@@ -174,4 +174,8 @@ void psbt_input_mark_ours(const tal_t *ctx,
  */
 bool psbt_input_is_ours(const struct wally_psbt_input *input);
 
+/* psbt_has_our_input  - Returns true if this psbt contains
+ * 			 any input that is ours
+ */
+bool psbt_has_our_input(const struct wally_psbt *psbt);
 #endif /* LIGHTNING_COMMON_PSBT_OPEN_H */