message: wallet: refactor: dedup sqlite statement preparations
diff: #include <sqlite3.h>
  #include <stdint.h>
  +#include <utility>
  +#include <vector>
  +
  static constexpr int32_t WALLET_SCHEMA_VERSION = 0;
  static Mutex g_sqlite_mutex;
  @@ -69,30 +72,21 @@ SQLiteDatabase::SQLiteDatabase(const fs::path& dir_path, const fs::path& file_pa
  void SQLiteBatch::SetupSQLStatements()
  {
  - int res;
  - if (!m_read_stmt) {
  - if ((res = sqlite3_prepare_v2(m_database.m_db, "SELECT value FROM main WHERE key = ?", -1, &m_read_stmt, nullptr)) != SQLITE_OK) {
  - throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
  - }
  - }
  - if (!m_insert_stmt) {
  - if ((res = sqlite3_prepare_v2(m_database.m_db, "INSERT INTO main VALUES(?, ?)", -1, &m_insert_stmt, nullptr)) != SQLITE_OK) {
  - throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
  - }
  - }
  - if (!m_overwrite_stmt) {
  - if ((res = sqlite3_prepare_v2(m_database.m_db, "INSERT or REPLACE into main values(?, ?)", -1, &m_overwrite_stmt, nullptr)) != SQLITE_OK) {
  - throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
  - }
  - }
  - if (!m_delete_stmt) {
  - if ((res = sqlite3_prepare_v2(m_database.m_db, "DELETE FROM main WHERE key = ?", -1, &m_delete_stmt, nullptr)) != SQLITE_OK) {
  - throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
  - }
  + const std::vector<std::pair<sqlite3_stmt**, const char*>> statements{
  + {&m_read_stmt, "SELECT value FROM main WHERE key = ?"},
  + {&m_insert_stmt, "INSERT INTO main VALUES(?, ?)"},
  + {&m_overwrite_stmt, "INSERT or REPLACE into main values(?, ?)"},
  + {&m_delete_stmt, "DELETE FROM main WHERE key = ?"},
  + {&m_cursor_stmt, "SELECT key, value FROM main"},
  + };
  +
  + for (const auto& [stmt_prepared, stmt_text] : statements) {
  + if (*stmt_prepared == nullptr) {
  + int res = sqlite3_prepare_v2(m_database.m_db, stmt_text, -1, stmt_prepared, nullptr);
  + if (res != SQLITE_OK) {
  + throw std::runtime_error(strprintf(
  + "SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
  }
  - if (!m_cursor_stmt) {
  - if ((res = sqlite3_prepare_v2(m_database.m_db, "SELECT key, value FROM main", -1, &m_cursor_stmt, nullptr)) != SQLITE_OK) {
  - throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements : %s\n", sqlite3_errstr(res)));
  }
  }
  }
  