From 3d297861eb78db6151f282e4eaff0be4cd819aec Mon Sep 17 00:00:00 2001
From: "Dr. Maxim Orlovsky" <orlovsky@pandoracore.com>
Date: Mon, 7 Sep 2020 13:06:43 +0200
Subject: Require creator to initialize empty output fields

The current version of the spec requires creator role to initialize empty input fields, but says nothing about output field initialization. At the same time, the following role, updater, "should also add redeemScripts, witnessScripts, and BIP 32 derivation paths to the input and output data if it knows them.", which does not make any sense if the fields were uninitialized. The [current Bitcoin Core implementation does this](https://github.com/bitcoin/bitcoin/blob/a24806c25d7a81a9c436de58eb5778d93abab16b/src/psbt.cpp#L12), and [other PSBT implementations, like rust-bitcoin, follow this practice](https://github.com/rust-bitcoin/rust-bitcoin/blob/master/src/util/psbt/mod.rs#L59)
---
 bip-0174.mediawiki | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'bip-0174.mediawiki')

diff --git a/bip-0174.mediawiki b/bip-0174.mediawiki
index 65fa9a9..9bb35c8 100644
--- a/bip-0174.mediawiki
+++ b/bip-0174.mediawiki
@@ -357,7 +357,7 @@ Using the transaction format involves many different responsibilities. Multiple
 ===Creator===
 
 The Creator creates a new PSBT. It must create an unsigned transaction and place it in the PSBT.
-The Creator must create empty input fields.
+The Creator must create empty input and output fields fields.
 
 ===Updater===
 
-- 
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