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LedgerHeaderUtils.cpp
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// Copyright 2018 Stellar Development Foundation and contributors. Licensed
// under the Apache License, Version 2.0. See the COPYING file at the root
// of this distribution or at http://www.apache.org/licenses/LICENSE-2.0
#include "ledger/LedgerHeaderUtils.h"
#include "crypto/Hex.h"
#include "crypto/SHA.h"
#include "database/Database.h"
#include "database/DatabaseUtils.h"
#include "util/Decoder.h"
#include "util/XDRStream.h"
#include "util/format.h"
#include "util/types.h"
#include "xdrpp/marshal.h"
#include <util/basen.h>
#include "util/Logging.h"
namespace stellar
{
namespace LedgerHeaderUtils
{
bool
isValid(LedgerHeader const& lh)
{
bool res = (lh.ledgerSeq <= INT32_MAX);
res = res && (lh.scpValue.closeTime <= INT64_MAX);
res = res && (lh.feePool >= 0);
res = res && (lh.idPool <= INT64_MAX);
return res;
}
void
storeInDatabase(Database& db, LedgerHeader const& header)
{
if (!isValid(header))
{
throw std::runtime_error("invalid ledger header (insert)");
}
auto headerBytes(xdr::xdr_to_opaque(header));
std::string hash(binToHex(sha256(headerBytes))),
prevHash(binToHex(header.previousLedgerHash)),
bucketListHash(binToHex(header.bucketListHash));
std::string headerEncoded;
headerEncoded = decoder::encode_b64(headerBytes);
// note: columns other than "data" are there to faciliate lookup/processing
auto prep = db.getPreparedStatement(
"INSERT INTO ledgerheaders "
"(ledgerhash, prevhash, bucketlisthash, ledgerseq, closetime, data) "
"VALUES "
"(:h, :ph, :blh, :seq, :ct, :data)");
auto& st = prep.statement();
st.exchange(soci::use(hash));
st.exchange(soci::use(prevHash));
st.exchange(soci::use(bucketListHash));
st.exchange(soci::use(header.ledgerSeq));
st.exchange(soci::use(header.scpValue.closeTime));
st.exchange(soci::use(headerEncoded));
st.define_and_bind();
{
auto timer = db.getInsertTimer("ledger-header");
st.execute(true);
}
if (st.get_affected_rows() != 1)
{
throw std::runtime_error("Could not update data in SQL");
}
}
LedgerHeader
decodeFromData(std::string const& data)
{
LedgerHeader lh;
std::vector<uint8_t> decoded;
decoder::decode_b64(data, decoded);
xdr::xdr_get g(&decoded.front(), &decoded.back() + 1);
xdr::xdr_argpack_archive(g, lh);
g.done();
if (!isValid(lh))
{
throw std::runtime_error("invalid ledger header (load)");
}
return lh;
}
std::shared_ptr<LedgerHeader>
loadByHash(Database& db, Hash const& hash)
{
std::shared_ptr<LedgerHeader> lhPtr;
std::string hash_s(binToHex(hash));
std::string headerEncoded;
auto prep = db.getPreparedStatement("SELECT data FROM ledgerheaders "
"WHERE ledgerhash = :h");
auto& st = prep.statement();
st.exchange(soci::into(headerEncoded));
st.exchange(soci::use(hash_s));
st.define_and_bind();
{
auto timer = db.getSelectTimer("ledger-header");
st.execute(true);
}
if (st.got_data())
{
auto lh = decodeFromData(headerEncoded);
lhPtr = std::make_shared<LedgerHeader>(lh);
auto ledgerHash = sha256(xdr::xdr_to_opaque(lh));
if (ledgerHash != hash)
{
throw std::runtime_error(
fmt::format("Wrong hash in ledger header database: "
"loaded ledger {} contains {}",
binToHex(ledgerHash), binToHex(hash)));
}
}
return lhPtr;
}
std::shared_ptr<LedgerHeader>
loadBySequence(Database& db, soci::session& sess, uint32_t seq)
{
std::shared_ptr<LedgerHeader> lhPtr;
std::string headerEncoded;
{
auto timer = db.getSelectTimer("ledger-header");
sess << "SELECT data FROM ledgerheaders "
"WHERE ledgerseq = :s",
soci::into(headerEncoded), soci::use(seq);
}
if (sess.got_data())
{
auto lh = decodeFromData(headerEncoded);
lhPtr = std::make_shared<LedgerHeader>(lh);
if (lh.ledgerSeq != seq)
{
throw std::runtime_error(
fmt::format("Wrong sequence number in ledger header database: "
"loaded ledger {} contains {}",
seq, lh.ledgerSeq));
}
}
return lhPtr;
}
void
deleteOldEntries(Database& db, uint32_t ledgerSeq, uint32_t count)
{
DatabaseUtils::deleteOldEntriesHelper(db.getSession(), ledgerSeq, count,
"ledgerheaders", "ledgerseq");
}
size_t
copyToStream(Database& db, soci::session& sess, uint32_t ledgerSeq,
uint32_t ledgerCount, XDROutputFileStream& headersOut)
{
uint32_t begin = ledgerSeq, end = ledgerSeq + ledgerCount;
assert(begin <= end);
std::string headerEncoded;
auto timer = db.getSelectTimer("ledger-header-history");
soci::statement st =
(sess.prepare << "SELECT data FROM ledgerheaders "
"WHERE ledgerseq >= :begin AND ledgerseq < :end ORDER "
"BY ledgerseq ASC",
soci::into(headerEncoded), soci::use(begin), soci::use(end));
size_t n = 0;
st.execute(true);
while (st.got_data())
{
LedgerHeaderHistoryEntry lhe;
lhe.header = decodeFromData(headerEncoded);
lhe.hash = sha256(xdr::xdr_to_opaque(lhe.header));
CLOG(DEBUG, "Ledger")
<< "Streaming ledger-header " << lhe.header.ledgerSeq;
headersOut.writeOne(lhe);
++n;
st.fetch();
}
return n;
}
void
dropAll(Database& db)
{
db.getSession() << "DROP TABLE IF EXISTS ledgerheaders;";
db.getSession() << "CREATE TABLE ledgerheaders ("
"ledgerhash CHARACTER(64) PRIMARY KEY,"
"prevhash CHARACTER(64) NOT NULL,"
"bucketlisthash CHARACTER(64) NOT NULL,"
"ledgerseq INT UNIQUE CHECK (ledgerseq >= 0),"
"closetime BIGINT NOT NULL CHECK (closetime >= 0),"
"data TEXT NOT NULL"
");";
db.getSession()
<< "CREATE INDEX ledgersbyseq ON ledgerheaders ( ledgerseq );";
}
}
}