From 95f3478ebe9d9dc717e0d0a8a48a83acb893b798 Mon Sep 17 00:00:00 2001
From: evoskuil <eric@voskuil.org>
Date: Tue, 2 Dec 2025 22:34:52 -0500
Subject: [PATCH] Add first "hash" property to header and tx json
 serialization.

---
 src/chain/header.cpp       | 2 ++
 src/chain/transaction.cpp  | 2 ++
 test/chain/block.cpp       | 2 ++
 test/chain/header.cpp      | 1 +
 test/chain/transaction.cpp | 1 +
 5 files changed, 8 insertions(+)

diff --git a/src/chain/header.cpp b/src/chain/header.cpp
index 35549529d4..16d7d9d340 100644
--- a/src/chain/header.cpp
+++ b/src/chain/header.cpp
@@ -386,6 +386,8 @@ DEFINE_JSON_FROM_TAG(header)
 {
     value =
     {
+        // hash is meta property
+        { "hash", encode_hash(instance.hash()) },
         { "version", instance.version() },
         { "previous", encode_hash(instance.previous_block_hash()) },
         { "merkle_root", encode_hash(instance.merkle_root()) },
diff --git a/src/chain/transaction.cpp b/src/chain/transaction.cpp
index 720bcb1b32..e244a4dadf 100644
--- a/src/chain/transaction.cpp
+++ b/src/chain/transaction.cpp
@@ -969,6 +969,8 @@ DEFINE_JSON_FROM_TAG(transaction)
 {
     value =
     {
+        // hash is meta property
+        { "hash", encode_hash(instance.hash(false)) },
         { "version", instance.version() },
         { "inputs", value_from(*instance.inputs_ptr()) },
         { "outputs", value_from(*instance.outputs_ptr()) },
diff --git a/test/chain/block.cpp b/test/chain/block.cpp
index b7ba465cab..3907af5852 100644
--- a/test/chain/block.cpp
+++ b/test/chain/block.cpp
@@ -724,6 +724,7 @@ BOOST_AUTO_TEST_CASE(block__json__conversions__expected)
         "{"
             "\"header\":"
             "{"
+                "\"hash\":\"d5b1048b2dcb443dd79a15e54de994fa18620d1d99250f2a4123660c68dea664\","
                 "\"version\":42,"
                 "\"previous\":\"0000000000000000000000000000000000000000000000000000000000000000\","
                 "\"merkle_root\":\"0000000000000000000000000000000000000000000000000000000000000001\","
@@ -734,6 +735,7 @@ BOOST_AUTO_TEST_CASE(block__json__conversions__expected)
             "\"transactions\":"
             "["
                 "{"
+                    "\"hash\":\"6d74f0162f9c7a3be99cb60cca0c658f3e19fb3462f4c9731d5a0b7495183335\","
                     "\"version\":42,"
                     "\"inputs\":"
                     "["
diff --git a/test/chain/header.cpp b/test/chain/header.cpp
index 66b3e26dff..9c268e02ea 100644
--- a/test/chain/header.cpp
+++ b/test/chain/header.cpp
@@ -353,6 +353,7 @@ BOOST_AUTO_TEST_CASE(header__json__conversions__expected)
     const std::string text
     {
         "{"
+            "\"hash\":\"d5b1048b2dcb443dd79a15e54de994fa18620d1d99250f2a4123660c68dea664\","
             "\"version\":42,"
             "\"previous\":\"0000000000000000000000000000000000000000000000000000000000000000\","
             "\"merkle_root\":\"0000000000000000000000000000000000000000000000000000000000000001\","
diff --git a/test/chain/transaction.cpp b/test/chain/transaction.cpp
index 8588d5a22d..21cff8be97 100644
--- a/test/chain/transaction.cpp
+++ b/test/chain/transaction.cpp
@@ -1504,6 +1504,7 @@ BOOST_AUTO_TEST_CASE(transaction__json__conversions__expected)
     const std::string text
     {
         "{"
+            "\"hash\":\"6d74f0162f9c7a3be99cb60cca0c658f3e19fb3462f4c9731d5a0b7495183335\","
             "\"version\":42,"
             "\"inputs\":"
             "["