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// Copyright (c) 2026 Bitflash developers
// Distributed under the MIT/X11 software license.
#include "headers.h"
#include "wallet_sqlite.h"
static void SetSQLiteError(sqlite3* pdb, const string& strContext,
string& strError)
{
if (pdb)
strError = strContext + ": " + sqlite3_errmsg(pdb);
else
strError = strContext;
}
CWalletDBSQLite::CWalletDBSQLite() : pdb(NULL)
{
}
CWalletDBSQLite::~CWalletDBSQLite()
{
Close();
}
bool CWalletDBSQLite::Open(const string& strPath, string& strError)
{
Close();
int ret = sqlite3_open_v2(strPath.c_str(), &pdb,
SQLITE_OPEN_READWRITE |
SQLITE_OPEN_CREATE |
SQLITE_OPEN_FULLMUTEX,
NULL);
if (ret != SQLITE_OK)
{
SetSQLiteError(pdb, "cannot open SQLite wallet", strError);
Close();
return false;
}
sqlite3_busy_timeout(pdb, 5000);
if (!Exec("PRAGMA journal_mode=WAL;", strError))
{
Close();
return false;
}
if (!Exec("PRAGMA synchronous=FULL;", strError))
{
Close();
return false;
}
if (!InitSchema(strError))
{
Close();
return false;
}
return true;
}
void CWalletDBSQLite::Close()
{
if (pdb)
{
sqlite3_close(pdb);
pdb = NULL;
}
}
bool CWalletDBSQLite::BeginTransaction(string& strError)
{
if (!pdb)
{
strError = "SQLite wallet is not open";
return false;
}
return Exec("BEGIN IMMEDIATE;", strError);
}
bool CWalletDBSQLite::CommitTransaction(string& strError)
{
if (!pdb)
{
strError = "SQLite wallet is not open";
return false;
}
return Exec("COMMIT;", strError);
}
bool CWalletDBSQLite::RollbackTransaction(string& strError)
{
if (!pdb)
{
strError = "SQLite wallet is not open";
return false;
}
return Exec("ROLLBACK;", strError);
}
bool CWalletDBSQLite::Exec(const char* pszSql, string& strError)
{
char* pszErr = NULL;
int ret = sqlite3_exec(pdb, pszSql, NULL, NULL, &pszErr);
if (ret != SQLITE_OK)
{
if (pszErr)
{
strError = pszErr;
sqlite3_free(pszErr);
}
else
SetSQLiteError(pdb, "SQLite exec failed", strError);
return false;
}
return true;
}
bool CWalletDBSQLite::InitSchema(string& strError)
{
return Exec("CREATE TABLE IF NOT EXISTS wallet_records ("
"key BLOB PRIMARY KEY NOT NULL,"
"value BLOB NOT NULL"
");",
strError) &&
Exec("PRAGMA user_version=1;", strError);
}
bool CWalletDBSQLite::WriteRecord(const vector<unsigned char>& vchKey,
const vector<unsigned char>& vchValue,
string& strError)
{
if (!pdb)
{
strError = "SQLite wallet is not open";
return false;
}
if (vchKey.empty())
{
strError = "SQLite wallet record key is empty";
return false;
}
sqlite3_stmt* stmt = NULL;
const char* pszSql =
"INSERT OR REPLACE INTO wallet_records(key, value) VALUES(?, ?);";
int ret = sqlite3_prepare_v2(pdb, pszSql, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
SetSQLiteError(pdb, "cannot prepare SQLite wallet write", strError);
return false;
}
ret = sqlite3_bind_blob(stmt, 1, &vchKey[0], (int)vchKey.size(),
SQLITE_TRANSIENT);
if (ret == SQLITE_OK)
ret = sqlite3_bind_blob(stmt, 2,
vchValue.empty() ? NULL : &vchValue[0],
(int)vchValue.size(),
SQLITE_TRANSIENT);
if (ret == SQLITE_OK)
ret = sqlite3_step(stmt);
bool fOk = (ret == SQLITE_DONE);
if (!fOk)
SetSQLiteError(pdb, "cannot write SQLite wallet record", strError);
sqlite3_finalize(stmt);
return fOk;
}
bool CWalletDBSQLite::ReadRecord(const vector<unsigned char>& vchKey,
vector<unsigned char>& vchValueRet,
string& strError)
{
vchValueRet.clear();
if (!pdb)
{
strError = "SQLite wallet is not open";
return false;
}
if (vchKey.empty())
{
strError = "SQLite wallet record key is empty";
return false;
}
sqlite3_stmt* stmt = NULL;
const char* pszSql = "SELECT value FROM wallet_records WHERE key = ?;";
int ret = sqlite3_prepare_v2(pdb, pszSql, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
SetSQLiteError(pdb, "cannot prepare SQLite wallet read", strError);
return false;
}
ret = sqlite3_bind_blob(stmt, 1, &vchKey[0], (int)vchKey.size(),
SQLITE_TRANSIENT);
if (ret != SQLITE_OK)
{
SetSQLiteError(pdb, "cannot bind SQLite wallet key", strError);
sqlite3_finalize(stmt);
return false;
}
ret = sqlite3_step(stmt);
if (ret == SQLITE_ROW)
{
const unsigned char* pch =
(const unsigned char*)sqlite3_column_blob(stmt, 0);
int nBytes = sqlite3_column_bytes(stmt, 0);
if (nBytes > 0 && pch)
vchValueRet.assign(pch, pch + nBytes);
sqlite3_finalize(stmt);
return true;
}
if (ret == SQLITE_DONE)
strError = "SQLite wallet record not found";
else
SetSQLiteError(pdb, "cannot read SQLite wallet record", strError);
sqlite3_finalize(stmt);
return false;
}
bool CWalletDBSQLite::CountRecords(int& nRecordsRet, string& strError)
{
nRecordsRet = 0;
if (!pdb)
{
strError = "SQLite wallet is not open";
return false;
}
sqlite3_stmt* stmt = NULL;
int ret = sqlite3_prepare_v2(pdb,
"SELECT COUNT(*) FROM wallet_records;",
-1, &stmt, NULL);
if (ret != SQLITE_OK)
{
SetSQLiteError(pdb, "cannot prepare SQLite wallet count", strError);
return false;
}
ret = sqlite3_step(stmt);
if (ret != SQLITE_ROW)
{
SetSQLiteError(pdb, "cannot count SQLite wallet records", strError);
sqlite3_finalize(stmt);
return false;
}
nRecordsRet = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
return true;
}
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