Adapt to db changes, impl most of electrum send_get_status().

include/bitcoin/server/protocols/protocol_electrum.hpp

@@ -279,6 +279,10 @@ class BCS_API protocol_electrum
     array_t transform(const database::histories& histories) NOEXCEPT;
     array_t transform(const database::unspents& unspents) NOEXCEPT;
 
+    // Shared get_status implementation.
+    bool send_get_status(const std::string& tx_hash, double txout_idx,
+        const std::string& spk_hint) NOEXCEPT;
+
     // These are thread safe.
     const options_t& options_;
     const bool turbo_;

src/protocols/electrum/protocol_electrum.cpp

@@ -33,6 +33,8 @@ using namespace system;
 using namespace network::rpc;
 using namespace std::placeholders;
 
+BC_PUSH_WARNING(NO_THROW_IN_NOEXCEPT)
+
 // Electrum could be factored into protocols by version, with version-dependent
 // protocol attachment and with protocol derivations (see p2p). Currently all
 // methods apart from version are in one protocol class.
@@ -310,5 +312,7 @@ void protocol_electrum::do_scriptpubkey(node::address_t) NOEXCEPT
     }, 128, BIND(handle_send, _1));
 }
 
+BC_POP_WARNING()
+
 } // namespace server
 } // namespace libbitcoin

src/protocols/electrum/protocol_electrum_mempool.cpp

@@ -45,7 +45,8 @@ void protocol_electrum::handle_mempool_get_fee_histogram(const code& ec,
     }
 
     // TODO: Empty array (of tuples), could be simulated with block fees.
-    send_result(array_t{}, 42, BIND(complete, _1));
+    ////send_result(array_t{}, 42, BIND(complete, _1));
+    send_code(error::not_implemented);
 }
 
 void protocol_electrum::handle_mempool_get_info(const code& ec,

src/protocols/electrum/protocol_electrum_outputs.cpp

@@ -18,6 +18,7 @@
  */
 #include <bitcoin/server/protocols/protocol_electrum.hpp>
 
+#include <utility>
 #include <bitcoin/server/define.hpp>
 
 namespace libbitcoin {
@@ -29,6 +30,8 @@ using namespace system;
 using namespace network::rpc;
 using namespace std::placeholders;
 
+BC_PUSH_WARNING(NO_THROW_IN_NOEXCEPT)
+
 void protocol_electrum::handle_blockchain_utxo_get_address(const code& ec,
     rpc_interface::blockchain_utxo_get_address, const std::string& tx_hash,
     double index) NOEXCEPT
@@ -91,48 +94,32 @@ void protocol_electrum::handle_blockchain_outpoint_get_status(const code& ec,
         return;
     }
 
-    uint32_t index{};
-    hash_digest hash{};
-    if (!to_integer(index, txout_idx) ||
-        !decode_hash(hash, tx_hash))
-    {
-        send_code(error::invalid_argument);
+    send_get_status(tx_hash, txout_idx, spk_hint);
+}
+
+void protocol_electrum::handle_blockchain_outpoint_subscribe(const code& ec,
+    rpc_interface::blockchain_outpoint_subscribe, const std::string& tx_hash,
+    double txout_idx, const std::string& spk_hint) NOEXCEPT
+{
+    if (stopped(ec))
         return;
-    }
 
-    // script is advisory, and should match prevout script.
-    if (!spk_hint.empty())
+    if (!at_least(electrum::version::v1_7))
     {
-        data_chunk bytes{};
-        if (!decode_base16(bytes, spk_hint))
-        {
-            send_code(error::invalid_argument);
-            return;
-        }
-
-        chain::script script{ std::move(bytes), false };
-        if (!script.is_valid())
-        {
-            send_code(error::invalid_argument);
-            return;
-        }
+        send_code(error::wrong_version);
+        return;
     }
 
-    // TODO: implement outpoint status query.
-    chain::point prevout{ hash, index };
-    send_result(object_t
-    {
-        { "height", 24 },
-        { "spender_txhash", "<hash>" },
-        { "spender_height", 42 }
+    if (!send_get_status(tx_hash, txout_idx, spk_hint))
+        return;
 
-    }, 16, BIND(complete, _1));
+    // TODO: collect the outpoint into a limited notification set.
+    subscribed_outpoint_.store(false, std::memory_order_relaxed);
 }
 
-// TODO: implement.
-void protocol_electrum::handle_blockchain_outpoint_subscribe(const code& ec,
-    rpc_interface::blockchain_outpoint_subscribe, const std::string& tx_hash,
-    double txout_idx, const std::string& spk_hint) NOEXCEPT
+void protocol_electrum::handle_blockchain_outpoint_unsubscribe(const code& ec,
+    rpc_interface::blockchain_outpoint_unsubscribe, const std::string& tx_hash,
+    double txout_idx) NOEXCEPT
 {
     if (stopped(ec))
         return;
@@ -152,67 +139,87 @@ void protocol_electrum::handle_blockchain_outpoint_subscribe(const code& ec,
         return;
     }
 
-    // script is advisory, but should match prevout script.
+    // TODO: remove outpoint subscription from notification set.
+    chain::point prevout{ hash, index };
+    const auto previous = subscribed_scriptpubkey_.load(
+        std::memory_order_relaxed);
+
+    send_result(previous, 16, BIND(complete, _1));
+}
+
+// utility.
+// ----------------------------------------------------------------------------
+
+bool protocol_electrum::send_get_status(const std::string& tx_hash,
+    double txout_idx, const std::string& spk_hint) NOEXCEPT
+{
+    uint32_t index{};
+    hash_digest hash{};
+    if (!to_integer(index, txout_idx) || !decode_hash(hash, tx_hash))
+    {
+        send_code(error::invalid_argument);
+        return false;
+    }
+
+    // This is parsed for correctness but is not used.
+    // Script is advisory, and should match output script.
     if (!spk_hint.empty())
     {
         data_chunk bytes{};
         if (!decode_base16(bytes, spk_hint))
         {
             send_code(error::invalid_argument);
-            return;
+            return false;
         }
 
         chain::script script{ std::move(bytes), false };
         if (!script.is_valid())
         {
             send_code(error::invalid_argument);
-            return;
+            return false;
         }
     }
 
-    // TODO: collect the outpoint into a limited notification set.
-    subscribed_outpoint_.store(false, std::memory_order_relaxed);
-
-    // TODO: implement outpoint status query.
-    chain::point prevout{ hash, index };
-    send_result(object_t
+    const auto& query = archive();
+    const auto tx = query.to_tx(hash);
+    const auto output = query.to_output(tx, index);
+    if (output.is_terminal())
     {
-        { "height", 24 },
-        { "spender_txhash", "<hash>" },
-        { "spender_height", 42 }
-
-    }, 16, BIND(complete, _1));
-}
-
-void protocol_electrum::handle_blockchain_outpoint_unsubscribe(const code& ec,
-    rpc_interface::blockchain_outpoint_unsubscribe, const std::string& tx_hash,
-    double txout_idx) NOEXCEPT
-{
-    if (stopped(ec))
-        return;
+        send_code(error::not_found);
+        return false;
+    }
 
-    if (!at_least(electrum::version::v1_7))
+    // TODO: database query.///////////////////////////////////////////////////
+    size_t height{ database::history::rooted_height };
+    if (const auto block = query.find_confirmed_block(tx); block.is_terminal())
     {
-        send_code(error::wrong_version);
-        return;
+        if (!query.is_confirmed_all_prevouts(tx))
+            height = database::history::unrooted_height;
     }
-
-    uint32_t index{};
-    hash_digest hash{};
-    if (!to_integer(index, txout_idx) ||
-        !decode_hash(hash, tx_hash))
+    else if (!query.get_height(height, block))
     {
-        send_code(error::invalid_argument);
-        return;
+        send_code(error::server_error);
+        return false;
     }
+    ///////////////////////////////////////////////////////////////////////////
 
-    // TODO: remove outpoint subscription from notification set.
-    chain::point prevout{ hash, index };
-    const auto previous = subscribed_scriptpubkey_.load(
-        std::memory_order_relaxed);
+    // TODO: query tx spenders sorted history./////////////////////////////////
+    const database::histories spenders{};
+    ///////////////////////////////////////////////////////////////////////////
 
-    send_result(previous, 16, BIND(complete, _1));
+    auto result = object_t{ { "height", to_unsigned(height) } };
+    if (!spenders.empty())
+    {
+        const auto& spender = spenders.front().tx;
+        result["spender_txhash"] = encode_hash(spender.hash());
+        result["spender_height"] = to_unsigned(spender.height());
+    }
+
+    send_result(std::move(result), 128, BIND(complete, _1));
+    return true;
 }
 
+BC_POP_WARNING()
+
 } // namespace server
 } // namespace libbitcoin

src/protocols/electrum/protocol_electrum_scripthash.cpp

@@ -364,21 +364,19 @@ void protocol_electrum::handle_blockchain_scripthash_unsubscribe(const code& ec,
 array_t protocol_electrum::transform(const database::histories& ins) NOEXCEPT
 {
     // Height is set to zero or max_size_t for unconfirmed history.
+    // to_signed() conversion is simple but sacrifices top height bit (ok).
     static_assert(to_signed(max_size_t) == -1 && is_max(max_size_t));
 
     array_t out(ins.size());
     std::ranges::transform(ins, out.begin(), [](const auto& in) NOEXCEPT
     {
-        const auto height = in.tx.height();
-        const bool unconfirmed = is_min(height) || is_max(height);
-
         object_t object
         {
-            { "height", to_signed(height) },
+            { "height", to_signed(in.tx.height()) },
             { "tx_hash", encode_hash(in.tx.hash()) }
         };
 
-        if (unconfirmed)
+        if (!in.confirmed())
         {
             // A fee of max_uint64 implies missing prevout(s). This will happen
             // for a block-downloaded tx queried during parallel block download
@@ -400,13 +398,13 @@ array_t protocol_electrum::transform(const database::unspents& ins) NOEXCEPT
     array_t out(ins.size());
     std::ranges::transform(ins, out.begin(), [](const auto& in) NOEXCEPT
     {
-        const auto& tx = in.tx;
+        const auto& out = in.out;
         return object_t
         {
-            { "tx_hash", encode_hash(tx.point().hash()) },
-            { "tx_pos",  tx.point().index() },
+            { "tx_hash", encode_hash(out.point().hash()) },
+            { "tx_pos",  out.point().index() },
             { "height",  in.height },
-            { "value",   tx.value() }
+            { "value",   out.value() }
         };
     });
 

test/protocols/electrum/electrum_mempool.cpp

@@ -23,6 +23,7 @@ BOOST_FIXTURE_TEST_SUITE(electrum_tests, electrum_setup_fixture)
 
 using namespace system;
 static const code wrong_version{ server::error::wrong_version };
+static const code not_implemented{ server::error::not_implemented };
 
 // mempool.get_fee_histogram
 
@@ -51,12 +52,14 @@ BOOST_AUTO_TEST_CASE(electrum__mempool_get_fee_histogram__extra_param__dropped)
     REQUIRE_NO_THROW_TRUE(response.at("dropped").as_bool());
 }
 
-BOOST_AUTO_TEST_CASE(electrum__mempool_get_fee_histogram__empty_params__empty_array)
+BOOST_AUTO_TEST_CASE(electrum__mempool_get_fee_histogram__empty_params__not_implemented)
 {
     BOOST_REQUIRE(handshake(electrum::version::v1_2));
 
     const auto response = get(R"({"id":603,"method":"mempool.get_fee_histogram","params":[]})" "\n");
-    REQUIRE_NO_THROW_TRUE(response.at("result").as_array().empty());
+    REQUIRE_NO_THROW_TRUE(response.at("error").as_object().at("code").is_int64());
+    BOOST_REQUIRE_EQUAL(response.at("error").as_object().at("code").as_int64(), not_implemented.value());
+    ///REQUIRE_NO_THROW_TRUE(response.at("result").as_array().empty());
 }
 
 // mempool.get_info