Implement get_spent().

Author: evoskuil

include/bitcoin/database/impl/query/objects.ipp

@@ -304,6 +304,41 @@ typename CLASS::output::cptr CLASS::get_output(
     return out.output;
 }
 
+TEMPLATE
+typename CLASS::point CLASS::get_spent(const output_link& link) const NOEXCEPT
+{
+    ////const auto tx = to_output_tx(link);
+    ////const auto hash = get_tx_key(tx);
+    ////const auto index = to_output_index(tx, link);
+    ////if (tx.is_terminal())
+    ////{
+    ////    return { {}, 42 };
+    ////}
+    ////else if (hash == system::null_hash && index == point::null_index)
+    ////{
+    ////    return { {}, 96 };
+    ////}
+    ////else if (hash == system::null_hash && index != point::null_index)
+    ////{
+    ////    return { {}, index };
+    ////}
+    ////else if (hash != system::null_hash && index == point::null_index)
+    ////{
+    ////    return { hash, 69 };
+    ////}
+    ////else // if (hash != system::null_hash && index != point::null_index)
+    ////{
+    ////    return { hash, index };
+    ////}
+
+    if (const auto tx = to_output_tx(link); !tx.is_terminal())
+        if (const auto index = to_output_index(tx, link);
+            index != point::null_index)
+            return { get_tx_key(tx), index };
+
+    return {};
+}
+
 TEMPLATE
 typename CLASS::point CLASS::get_spender(const point_link& link) const NOEXCEPT
 {

include/bitcoin/database/query.hpp

@@ -394,10 +394,11 @@ class query
     input::cptr get_input(const tx_link& link, uint32_t index,
         bool witness) const NOEXCEPT;
 
+    point get_spent(const output_link& link) const NOEXCEPT;
+    point get_spender(const point_link& link) const NOEXCEPT;
     script::cptr get_output_script(const output_link& link) const NOEXCEPT;
     output::cptr get_output(const output_link& link) const NOEXCEPT;
     output::cptr get_output(const tx_link& link, uint32_t index) const NOEXCEPT;
-    point get_spender(const point_link& link) const NOEXCEPT;
     inputs_ptr get_spenders(const output_link& link,
         bool witness) const NOEXCEPT;