From c0cb623acc012acaa6f2936a6cb6cbfe6d16b0d2 Mon Sep 17 00:00:00 2001
From: Andrew Chow <achow101-github@achow101.com>
Date: Mon, 19 Apr 2021 15:01:20 -0400
Subject: [PATCH] Allow value commitments instead of explicit value

It is not invalid to have a value commitment and no explicit value. It
is only invalid to have neither for an output.
---
 src/psbt.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/psbt.h b/src/psbt.h
index 826d8dd05a..3498a7dc1e 100644
--- a/src/psbt.h
+++ b/src/psbt.h
@@ -1223,7 +1223,7 @@ struct PSBTOutput
 
         // Make sure required PSBTv2 fields are present
         if (m_psbt_version >= 2) {
-            if (amount == nullopt) {
+            if (amount == nullopt && m_value_commitment.IsNull()) {
                 throw std::ios_base::failure("Output amount is required in PSBTv2");
             }
             if (script == nullopt) {