refactor: Modularize shamap and nodestore (#5668)

This change moves the shamap and nodestore from `xrpld` to `libxrpl`.

include/xrpl/shamap/Family.h

@@ -0,0 +1,89 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2015 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_SHAMAP_FAMILY_H_INCLUDED
+#define RIPPLE_SHAMAP_FAMILY_H_INCLUDED
+
+#include <xrpl/beast/utility/Journal.h>
+#include <xrpl/nodestore/Database.h>
+#include <xrpl/shamap/FullBelowCache.h>
+#include <xrpl/shamap/TreeNodeCache.h>
+
+#include <cstdint>
+
+namespace ripple {
+
+class Family
+{
+public:
+    Family(Family const&) = delete;
+    Family(Family&&) = delete;
+
+    Family&
+    operator=(Family const&) = delete;
+
+    Family&
+    operator=(Family&&) = delete;
+
+    explicit Family() = default;
+    virtual ~Family() = default;
+
+    virtual NodeStore::Database&
+    db() = 0;
+
+    virtual NodeStore::Database const&
+    db() const = 0;
+
+    virtual beast::Journal const&
+    journal() = 0;
+
+    /** Return a pointer to the Family Full Below Cache */
+    virtual std::shared_ptr<FullBelowCache>
+    getFullBelowCache() = 0;
+
+    /** Return a pointer to the Family Tree Node Cache */
+    virtual std::shared_ptr<TreeNodeCache>
+    getTreeNodeCache() = 0;
+
+    virtual void
+    sweep() = 0;
+
+    /** Acquire ledger that has a missing node by ledger sequence
+     *
+     * @param refNum Sequence of ledger to acquire.
+     * @param nodeHash Hash of missing node to report in throw.
+     */
+    virtual void
+    missingNodeAcquireBySeq(std::uint32_t refNum, uint256 const& nodeHash) = 0;
+
+    /** Acquire ledger that has a missing node by ledger hash
+     *
+     * @param refHash Hash of ledger to acquire.
+     * @param refNum Ledger sequence with missing node.
+     */
+    virtual void
+    missingNodeAcquireByHash(uint256 const& refHash, std::uint32_t refNum) = 0;
+
+    virtual void
+    reset() = 0;
+};
+
+}  // namespace ripple
+
+#endif