From 277be22357a0b51fa77113277a6cc057484a6507 Mon Sep 17 00:00:00 2001
From: Andrew Poelstra <apoelstra@wpsoftware.net>
Date: Wed, 29 Jul 2020 21:25:51 +0000
Subject: BIP174: add hash preimage fields to inputs

---
 bip-0174.mediawiki | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'bip-0174.mediawiki')

diff --git a/bip-0174.mediawiki b/bip-0174.mediawiki
index a6e2534..fc5d5e0 100644
--- a/bip-0174.mediawiki
+++ b/bip-0174.mediawiki
@@ -200,6 +200,30 @@ The currently defined per-input types are defined as follows:
 ** Value: The UTF-8 encoded commitment message string for the proof-of-reserves.  See [[bip-0127.mediawiki|BIP 127]] for more information.
 *** <tt>{porCommitment}</tt>
 
+* Type: RIPEMD160 preimage <tt>PSBT_RIPEMD160 = 0x0a</tt>
+** Key: The resulting hash of the preimage
+*** <tt>{0x0a}|{20-byte hash}</tt>
+** Value: The hash preimage, encoded as a byte vector, which must equal the key when run through the `RIPEMD160` algorithm
+*** <tt>{preimage}</tt>
+
+* Type: SHA256 preimage <tt>PSBT_SHA256 = 0x0b</tt>
+** Key: The resulting hash of the preimage
+*** <tt>{0x0b}|{32-byte hash}</tt>
+** Value: The hash preimage, encoded as a byte vector, which must equal the key when run through the `SHA256` algorithm
+*** <tt>{preimage}</tt>
+
+* Type: HASH160 preimage <tt>PSBT_HASH160 = 0x0c</tt>
+** Key: The resulting hash of the preimage
+*** <tt>{0x0c}|{20-byte hash}</tt>
+** Value: The hash preimage, encoded as a byte vector, which must equal the key when run through the `SHA256` algorithm followed by the `RIPEMD160` algorithm
+*** <tt>{preimage}</tt>
+
+* Type: HASH256 preimage <tt>PSBT_HASH256 = 0x0d</tt>
+** Key: The resulting hash of the preimage
+*** <tt>{0x0d}|{32-byte hash}</tt>
+** Value: The hash preimage, encoded as a byte vector, which must equal the key when run through the `SHA256` algorithm twice
+*** <tt>{preimage}</tt>
+
 * Type: Proprietary Use Type <tt>PSBT_IN_PROPRIETARY = 0xFC</tt>
 ** Key: Variable length identifier prefix, followed by a subtype, followed by the key data itself.
 *** <tt>{0xFC}|<prefix>|{subtype}|{key data}</tt>
-- 
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