Wallet.cpp

#include <xrpl/server/Wallet.h>
 
#include <xrpl/basics/Log.h>
#include <xrpl/basics/UnorderedContainers.h>
#include <xrpl/basics/base_uint.h>
#include <xrpl/basics/safe_cast.h>
#include <xrpl/beast/hash/uhash.h>
#include <xrpl/beast/utility/Journal.h>
#include <xrpl/core/PeerReservationTable.h>
#include <xrpl/protocol/KeyType.h>
#include <xrpl/protocol/PublicKey.h>
#include <xrpl/protocol/SecretKey.h>
#include <xrpl/protocol/tokens.h>
#include <xrpl/rdb/DBInit.h>
#include <xrpl/rdb/DatabaseCon.h>
#include <xrpl/rdb/SociDB.h>
#include <xrpl/server/Manifest.h>
 
#include <boost/optional/optional.hpp>  // IWYU pragma: keep
 
#include <soci/blob-exchange.h>  // IWYU pragma: keep
#include <soci/blob.h>
#include <soci/boost-optional.h>  // IWYU pragma: keep
#include <soci/into.h>
#include <soci/session.h>
#include <soci/statement.h>
#include <soci/transaction.h>
#include <soci/use.h>
 
#include <array>
#include <cstddef>
#include <format>
#include <functional>
#include <memory>
#include <string>
#include <unordered_set>
#include <utility>
 
namespace xrpl {
 
std::unique_ptr<DatabaseCon>
makeWalletDB(DatabaseCon::Setup const& setup, beast::Journal j)
{
    // wallet database
    return std::make_unique<DatabaseCon>(
        setup, kWalletDbName, std::array<std::string, 0>(), kWalletDbInit, j);
}
 
std::unique_ptr<DatabaseCon>
makeTestWalletDB(DatabaseCon::Setup const& setup, std::string const& dbname, beast::Journal j)
{
    // wallet database
    return std::make_unique<DatabaseCon>(
        setup, dbname.data(), std::array<std::string, 0>(), kWalletDbInit, j);
}
 
void
getManifests(
    soci::session& session,
    std::string const& dbTable,
    ManifestCache& cache,
    beast::Journal j)
{
    // Load manifests stored in database
    std::string const sql = "SELECT RawData FROM " + dbTable + ";";
    soci::blob sociRawData(session);
    soci::statement st = (session.prepare << sql, soci::into(sociRawData));
    st.execute();
    while (st.fetch())
    {
        std::string serialized;
        convert(sociRawData, serialized);
        if (auto mo = deserializeManifest(serialized))
        {
            if (!mo->verify())
            {
                JLOG(j.warn()) << "Unverifiable manifest in db";
                continue;
            }
 
            // Only trusted manifests are persisted (see saveManifests), so
            // anything loaded from the DB bypasses the untrusted cap.
            cache.applyManifest(std::move(*mo), ManifestRateLimitCapPolicy::Uncapped);
        }
        else
        {
            JLOG(j.warn()) << "Malformed manifest in database";
        }
    }
}
 
static void
saveManifest(soci::session& session, std::string const& dbTable, std::string const& serialized)
{
    // soci does not support bulk insertion of blob data
    // Do not reuse blob because manifest ecdsa signatures vary in length
    // but blob write length is expected to be >= the last write
    soci::blob rawData(session);
    convert(serialized, rawData);
    session << "INSERT INTO " << dbTable << " (RawData) VALUES (:rawData);", soci::use(rawData);
}
 
void
saveManifests(
    soci::session& session,
    std::string const& dbTable,
    std::function<bool(PublicKey const&)> const& isTrusted,
    hash_map<PublicKey, Manifest> const& map,
    beast::Journal j)
{
    soci::transaction tr(session);
    session << "DELETE FROM " << dbTable;
    // Count skipped untrusted manifests and log one summary afterwards, since
    // the cache can hold many and per-entry logging would flood at shutdown.
    std::size_t skipped = 0;
    for (auto const& v : map)
    {
        // Persist only trusted keys. Untrusted gossip is left out so a flood
        // cannot survive a restart on disk.
        if (!isTrusted(v.second.masterKey))
        {
            ++skipped;
            continue;
        }
 
        saveManifest(session, dbTable, v.second.serialized);
    }
    tr.commit();
 
    if (skipped != 0)
    {
        JLOG(j.info()) << skipped << " untrusted manifest(s) in cache not saved to db";
    }
}
 
void
addValidatorManifest(soci::session& session, std::string const& serialized)
{
    soci::transaction tr(session);
    saveManifest(session, "ValidatorManifests", serialized);
    tr.commit();
}
 
void
clearNodeIdentity(soci::session& session)
{
    session << "DELETE FROM NodeIdentity;";
}
 
std::pair<PublicKey, SecretKey>
getNodeIdentity(soci::session& session)
{
    {
        // SOCI requires boost::optional (not std::optional) as the parameter.
        boost::optional<std::string> pubKO, priKO;
        soci::statement st =
            (session.prepare << "SELECT PublicKey, PrivateKey FROM NodeIdentity;",
             soci::into(pubKO),
             soci::into(priKO));
        st.execute();
        while (st.fetch())
        {
            auto const sk = parseBase58<SecretKey>(TokenType::NodePrivate, priKO.value_or(""));
            auto const pk = parseBase58<PublicKey>(TokenType::NodePublic, pubKO.value_or(""));
 
            // Only use if the public and secret keys are a pair
            if (sk && pk && (*pk == derivePublicKey(KeyType::Secp256k1, *sk)))
                return {*pk, *sk};
        }
    }
 
    // If a valid identity wasn't found, we randomly generate a new one:
    auto [newpublicKey, newsecretKey] = randomKeyPair(KeyType::Secp256k1);
 
    session << std::format(
        "INSERT INTO NodeIdentity (PublicKey,PrivateKey) "
        "VALUES ('{}','{}');",
        toBase58(TokenType::NodePublic, newpublicKey),
        toBase58(TokenType::NodePrivate, newsecretKey));
 
    return {newpublicKey, newsecretKey};
}
 
std::unordered_set<PeerReservation, beast::Uhash<>, KeyEqual>
getPeerReservationTable(soci::session& session, beast::Journal j)
{
    std::unordered_set<PeerReservation, beast::Uhash<>, KeyEqual> table;
    // These values must be boost::optionals (not std) because SOCI expects
    // boost::optionals.
    boost::optional<std::string> valPubKey, valDesc;
    // We should really abstract the table and column names into constants,
    // but no one else does. Because it is too tedious? It would be easy if we
    // had a jOOQ for C++.
    soci::statement st =
        (session.prepare << "SELECT PublicKey, Description FROM PeerReservations;",
         soci::into(valPubKey),
         soci::into(valDesc));
    st.execute();
    while (st.fetch())
    {
        if (!valPubKey || !valDesc)
        {
            // This represents a `NULL` in a `NOT NULL` column. It should be
            // unreachable.
            continue;
        }
        auto const optNodeId = parseBase58<PublicKey>(TokenType::NodePublic, *valPubKey);
        if (!optNodeId)
        {
            JLOG(j.warn()) << "load: not a public key: " << valPubKey;
            continue;
        }
        table.insert(PeerReservation{.nodeId = *optNodeId, .description = *valDesc});
    }
 
    return table;
}
 
void
insertPeerReservation(
    soci::session& session,
    PublicKey const& nodeId,
    std::string const& description)
{
    auto const sNodeId = toBase58(TokenType::NodePublic, nodeId);
    session << "INSERT INTO PeerReservations (PublicKey, Description) "
               "VALUES (:nodeId, :desc) "
               "ON CONFLICT (PublicKey) DO UPDATE SET "
               "Description=excluded.Description",
        soci::use(sNodeId), soci::use(description);
}
 
void
deletePeerReservation(soci::session& session, PublicKey const& nodeId)
{
    auto const sNodeId = toBase58(TokenType::NodePublic, nodeId);
    session << "DELETE FROM PeerReservations WHERE PublicKey = :nodeId", soci::use(sNodeId);
}
 
bool
createFeatureVotes(soci::session& session)
{
    soci::transaction tr(session);
    std::string const sql =
        "SELECT count(*) FROM sqlite_master "
        "WHERE type='table' AND name='FeatureVotes'";
    // SOCI requires boost::optional (not std::optional) as the parameter.
    boost::optional<int> featureVotesCount;
    session << sql, soci::into(featureVotesCount);
    bool const exists = static_cast<bool>(*featureVotesCount);
 
    // Create FeatureVotes table in WalletDB if it doesn't exist
    if (!exists)
    {
        session << "CREATE TABLE  FeatureVotes ( "
                   "AmendmentHash      CHARACTER(64) NOT NULL, "
                   "AmendmentName      TEXT, "
                   "Veto               INTEGER NOT NULL );";
        tr.commit();
    }
    return exists;
}
 
void
readAmendments(
    soci::session& session,
    std::function<void(
        boost::optional<std::string> amendmentHash,
        boost::optional<std::string> amendmentName,
        boost::optional<AmendmentVote> vote)> const& callback)
{
    // lambda that converts the internally stored int to an AmendmentVote.
    auto intToVote = [](boost::optional<int> const& dbVote) -> boost::optional<AmendmentVote> {
        return safeCast<AmendmentVote>(dbVote.value_or(1));
    };
 
    soci::transaction const tr(session);
    std::string const sql =
        "SELECT AmendmentHash, AmendmentName, Veto FROM "
        "( SELECT AmendmentHash, AmendmentName, Veto, RANK() OVER "
        "(  PARTITION BY AmendmentHash ORDER BY ROWID DESC ) "
        "as rnk FROM FeatureVotes ) WHERE rnk = 1";
    // SOCI requires boost::optional (not std::optional) as parameters.
    boost::optional<std::string> amendmentHash;
    boost::optional<std::string> amendmentName;
    boost::optional<int> voteToVeto;
    soci::statement st =
        (session.prepare << sql,
         soci::into(amendmentHash),
         soci::into(amendmentName),
         soci::into(voteToVeto));
    st.execute();
    while (st.fetch())
    {
        callback(amendmentHash, amendmentName, intToVote(voteToVeto));
    }
}
 
void
voteAmendment(
    soci::session& session,
    uint256 const& amendment,
    std::string const& name,
    AmendmentVote vote)
{
    soci::transaction tr(session);
    std::string sql =
        "INSERT INTO FeatureVotes (AmendmentHash, AmendmentName, Veto) VALUES "
        "('";
    sql += to_string(amendment);
    sql += "', '" + name;
    sql += "', '" + std::to_string(safeCast<int>(vote)) + "');";
    session << sql;
    tr.commit();
}
 
}  // namespace xrpl