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Merge remote-tracking branch 'origin/master' into docs

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reaction.la 2023-11-25 08:24:51 +10:00
commit 0a0255a9f7
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9 changed files with 242 additions and 162 deletions
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1
msvc/wallet.vcxproj
View File

@ -150,6 +150,7 @@
<ItemGroup>
<ClCompile Include="../src/app.cpp" />
<ClCompile Include="../src/display_wallet.cpp" />
<ClCompile Include="../src/db_accessors.cpp" />
<ClCompile Include="../src/frame.cpp" />
<ClCompile Include="../src/ILog.cpp" />
<ClCompile Include="../src/ISqlit3Impl.cpp">

9
src/ISqlite3.h
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@ -1,13 +1,8 @@
#pragma once
#include "ILog.h"
// this is pure virtual interface base class between sqlite3, which speaks only C and utf8 char[]
// this is an interface base class between sqlite3, which speaks only C and utf8 char[]
// and wxWidgets which speaks only C++ and unicode strings.
// Usage: Call the factory function std::shared_ptr<ISqlite3> sqlite3_open(const char *) to get a shared
// pointer to the // Sqlite3 database object. Then call the factory function
// sqlite3_prepare(std::shared_ptr<ISqlite3>, const char *) to get a unique pointer to
// a compiled SQL statement
// Its primary purpose is to avoid code that needs both the wxWidgets header files,
// and the sqlite3.h header file.
//
@ -25,8 +20,6 @@
// substantially more difficult in C++14, because one is effectively rolling one's own
// unique pointer.
//
// It is therefore easier to implement a pure virtual base class with a virtual destructor and
// factory function that returns a smart pointer to a member of the derived implementation
//
/* This code is at a low level abstraction, because it provides low level C++ interface to inherently low level C
It is intended to be wrapped in higher level code that does not know about the nuts and bolts of sqlite3, but which supports throwing, templated functions, and all that.*/

45
src/db_accessors.cpp Normal file
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@ -0,0 +1,45 @@
#include "stdafx.h"
namespace ro {
static constexpr char SrcFilename[]{ "src/db_accessors.cpp" };
dbconnect::dbconnect(const wxFileName& filename) {
if (!filename.IsOk() || !filename.HasName() || !filename.HasExt()) throw
MyException("unexpected file name", __LINE__, __func__, SrcFilename);
if (!filename.FileExists())throw MyException(
std::string(filename.GetFullPath().ToUTF8()) + " does not exist.",
__LINE__, __func__, SrcFilename);
this->reset(Sqlite3_open(filename.GetFullPath().ToUTF8()));
}
// move constructor
dbconnect::dbconnect(dbconnect&& p) noexcept :std::unique_ptr<ISqlite3>(p.release()) {
}
// Move assignment
dbconnect& dbconnect::operator=(dbconnect&& p) noexcept {
std::unique_ptr<ISqlite3>::reset(p.release());
return *this;
}
sql::sql(const std::unique_ptr<ISqlite3>& p, const char* sz) :
std::unique_ptr<Icompiled_sql>(sqlite3_prepare(p.get(), sz)) {
}
// move constructor
sql::sql(sql&& p) noexcept :std::unique_ptr<Icompiled_sql>(p.release()) {
}
// Move assignment
sql& sql::operator=(sql&& p) noexcept {
std::unique_ptr<Icompiled_sql>::reset(p.release());
return *this;
}
sql::sql(Icompiled_sql* p) :
std::unique_ptr<Icompiled_sql>(p) {
}
sql::sql(std::unique_ptr<Icompiled_sql>&& p) :
std::unique_ptr<Icompiled_sql>(p.release()) {
}
}

68
src/db_accessors.h
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@ -15,26 +15,42 @@ namespace ro {
static_assert(is_sqlite3_field_type<int>::value);
//Owns a database connection and closes it when it is deconstructed
//Has move semantics
struct dbconnect : std::unique_ptr<ISqlite3> {
dbconnect(const wxFileName&); //And here we wrap our Cish implementation in C++ish implementation
dbconnect() = delete;
~dbconnect() = default; //Our base class takes care of it
// copy constructor
dbconnect(const dbconnect& a) = delete; //Move semantics
// move constructor
dbconnect(dbconnect&& p) noexcept;
// copy assignment
dbconnect& operator=(const dbconnect) = delete; //Move semantics
// Move assignment
dbconnect& operator=(dbconnect&& p) noexcept;
};
//Owns a compiled sql statement and destroys it when it is deconstructed.
//Has move semantics.
class sql : public std::unique_ptr<Icompiled_sql> {
public:
class monostate {};
sql() = delete;
sql(ISqlite3* p, const char* sz) :std::unique_ptr<Icompiled_sql>(sqlite3_prepare(p, sz)) {}
sql(const std::unique_ptr<ISqlite3>& p, const char* sz) :std::unique_ptr<Icompiled_sql>(sqlite3_prepare(p.get(), sz)) {}
sql(const std::unique_ptr<ISqlite3>& p, const char* sz);
// copy constructor
sql(const sql& a) = delete;
// move constructor
sql(sql&& p) noexcept :std::unique_ptr<Icompiled_sql>(p.release()) { }
sql(sql&& p) noexcept;
// copy assignment
sql& operator=(const sql) = delete;
// Move assignment
sql& operator=(sql&& p) noexcept {
std::unique_ptr<Icompiled_sql>::reset(p.release());
}
sql(Icompiled_sql* p) :std::unique_ptr<Icompiled_sql>(p) {}
sql(std::unique_ptr<Icompiled_sql>&& p) :std::unique_ptr<Icompiled_sql>(p.release()) { }
sql& operator=(sql&& p) noexcept;
sql(Icompiled_sql* p);
sql(std::unique_ptr<Icompiled_sql>&& p);
~sql() = default;
template <typename T>auto column(int i) const {
if constexpr (ro::blob_type<T>) {
auto st = (*this)->Isqlite3_column_blob(i);
@ -180,45 +196,13 @@ public:
};
class sql_insert_name {
ro::sql csql_begin;
ro::sql csql_into_names;
ro::sql csql_namekey_into_keys;
ro::sql csql_commit;
ro::sql csql_rollback;
public:
sql_insert_name(ISqlite3* p) :
csql_begin(p, R"|(BEGIN IMMEDIATE;)|"),
csql_into_names(p, R"|(INSERT OR FAIL INTO "Names" VALUES(NULL, ?1);)|"),
csql_namekey_into_keys(p, R"|(INSERT OR FAIL INTO "Keys" VALUES(NULL, ?1, last_insert_rowid(), 1);)|"),
/* NULL triggers special nonstandard Sqlite behavior to autogenerate a unique ROWID
Because we explicitly make the ROWID a named field in the table to avoid too much
non standard SQlite behavior, we must explicitly provide a placeholder in the INSERT
statement. So at least we only get special SQlite3 behavior when we deliberately
invoke it. */
csql_commit(p, R"|(COMMIT;)|"),
csql_rollback(p, R"|(ROLLBACK;)|")
{}
csql_into_names(p, R"|(INSERT OR FAIL INTO "UserZookoIDs" VALUES(?1, ?2);)|"){}
sql_insert_name(const std::unique_ptr<ISqlite3>& p) : sql_insert_name(p.get()) {}
void operator()(const char* psz, const ristretto255::point& pt) {
csql_begin.do_one();
try {
csql_into_names.do_one(psz);
csql_namekey_into_keys.do_one(pt);
}
catch (const MyException& e) {
csql_rollback.do_one();
if (e.what_num() == 19) {
throw MyException("Name already in database");
}
else {
throw;
}
}
catch (const std::exception &) {
csql_rollback.do_one();
throw;
}
csql_commit.do_one();
csql_into_names.do_one(psz,pt);
}
};
@ -234,7 +218,5 @@ public:
}
};
constexpr auto WALLET_FILE_IDENTIFIER (0x56d34bc5a655dd1fi64);
constexpr auto WALLET_FILE_SCHEMA_VERSION_0_0(1);

180
src/display_wallet.cpp
View File

@ -1,75 +1,32 @@
#include "stdafx.h"
using ro::base58;
static constexpr char SrcFilename[]{ "src/display_wallet.cpp" };
display_wallet::display_wallet(wxWindow* parent, wxFileName& walletfile) :
wxPanel(parent, myID_WALLET_UI, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, wxT("Wallet")),
m_db(nullptr), m_DisplayWalletEditMenu(1)
m_db(walletfile), m_DisplayWalletEditMenu(1),
m_read_names_and_keys(m_db, R"|(SELECT * FROM "UserZookoIDs"; )|"),
m_read_from_misc(m_db),
m_insert_name(m_db),
m_find_position(m_db, R"|( SELECT COUNT(*) FROM UserZookoIDs
WHERE LOWER("name")<LOWER(?1) OR (LOWER("name")=LOWER(?1) AND "name"<?1);)|")
{
wxLogMessage(wxT("Loading %s"), walletfile.GetFullPath());
try {
if (!walletfile.IsOk() || !walletfile.HasName() || !walletfile.HasExt()) throw MyException("unexpected file name", __LINE__, __func__, SrcFilename);
if (!walletfile.FileExists())throw MyException(
walletfile.GetFullPath().append(" does not exist.").ToUTF8(),
__LINE__, __func__, SrcFilename);
m_db.reset(Sqlite3_open(walletfile.GetFullPath().ToUTF8()));
m_read_from_misc.reset(new sql_read_from_misc(m_db));
m_read_names_and_keys.reset(new ro::sql(m_db,
R"|(SELECT "Names".name AS name, "Keys".pubkey AS pubkey FROM "Names" INNER JOIN "Keys" )|"
R"|(ON "Names"."ROWID"="Keys".id AND "Keys".use=1 ORDER BY LOWER(name), name COLLATE BINARY;)|"));
if (!(*m_read_from_misc)(1) || m_read_from_misc->value<int64_t>() != WALLET_FILE_IDENTIFIER)throw MyException(sz_unrecognizable_wallet_file_format);
if (!(*m_read_from_misc)(2) || m_read_from_misc->value<int64_t>() != WALLET_FILE_SCHEMA_VERSION_0_0 || !(*m_read_from_misc)(4))throw MyException(sz_unrecognized_wallet_schema);
m_MasterSecret= *(m_read_from_misc->value<ristretto255::scalar>());
if (!m_read_from_misc(1) || m_read_from_misc.value<int64_t>() != WALLET_FILE_IDENTIFIER)throw MyException(sz_unrecognizable_wallet_file_format);
if (!m_read_from_misc(2) || m_read_from_misc.value<int64_t>() != WALLET_FILE_SCHEMA_VERSION_0_0 || !m_read_from_misc(4))throw MyException(sz_unrecognized_wallet_schema);
m_MasterSecret= *(m_read_from_misc.value<ristretto255::scalar>());
ILogMessage(std::format("\t\tmaster secret: #{}", ro::base58(m_MasterSecret).operator const char* ()).c_str());
if(!m_MasterSecret.valid()) throw MyException(sz_cold_wallets_not_yet_implemented, __LINE__, __func__, SrcFilename);
auto sizer = new wxBoxSizer(wxHORIZONTAL);
m_lSizer = new wxBoxSizer(wxVERTICAL);
m_rSizer = new wxBoxSizer(wxVERTICAL);
sizer->Add(m_lSizer, 0, wxGROW, 4);
sizer->Add(m_rSizer, 50, wxGROW, 4);
sizer->Add(m_lSizer, 0, 0, 4);
sizer->Add(m_rSizer, 50, 0, 4);
SetSizer(sizer);
try {
while (m_read_names_and_keys->step() == Icompiled_sql::ROW) {
std::string name = m_read_names_and_keys->column<const char*>(0);
auto pubkey = *(m_read_names_and_keys->column<ristretto255::point>(1));
if (m_MasterSecret(name).timesBase() != pubkey)throw MyException(std::string(sz_public_key_of) + name + sz_fails_to_correspond);
m_lSizer->Add(
new wxStaticText(
this,
wxID_ANY,
name,
wxDefaultPosition, wxDefaultSize, wxALIGN_RIGHT | wxST_ELLIPSIZE_END
),
10,
wxEXPAND | // make horizontally stretchable
wxALL, // and make border all around
2);
m_rSizer->Add(
new wxStaticText(
this,
wxID_ANY,
"#" + base58(pubkey).operator std::string(),
wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT | wxST_ELLIPSIZE_END
),
10,
wxEXPAND | // make horizontally stretchable
wxALL, // and make border all around
2);
}
}
catch (const MyException& e) {
throw MyException(e, __LINE__, __func__, SrcFilename);
// sql exceptions tend to be unintelligible and excessively generic
// because unclear what statement provoked them.
}
catch (const std::exception& e) {
throw MyException(e, __LINE__, __func__, SrcFilename);
}
catch (...) {
szError = sz_unknown_error;
throw MyException(sz_unknown_error, __LINE__, __func__, SrcFilename);
}
Bind(wxEVT_CLOSE_WINDOW, &display_wallet::OnClose, this);
refresh_from_database();
this->SetSize(this->GetParent()->GetClientSize());
Bind(wxEVT_CLOSE_WINDOW, &display_wallet::OnClose, this);
singletonFrame->m_LastUsedWallet.Assign(walletfile);
m_DisplayWalletEditMenu.Menu->Append(
@ -93,8 +50,6 @@ display_wallet::display_wallet(wxWindow* parent, wxFileName& walletfile) :
szError = sz_unknown_error;
throw MyException(sz_unknown_error, __LINE__, __func__, SrcFilename);
}
}
display_wallet::~display_wallet() {
@ -104,6 +59,39 @@ void display_wallet::close_menu_event_handler(wxCommandEvent& event) {
Close(true);
}
struct display_wallet::cleanup {
cleanup() = delete;
// copy constructor
cleanup(const cleanup& a) = delete;
// move constructor
cleanup(cleanup&& p) = delete;
// copy assignment
cleanup& operator=(cleanup) = delete;
// Move assignment
cleanup& operator=(cleanup&&) = delete;
display_wallet* m_win;
wxSizer* sizer;
wxSize dirty_area;
cleanup(display_wallet* win) :
m_win(win),
sizer(win->GetSizer()),
dirty_area(sizer->ComputeFittingClientSize(singletonFrame))
{
assert(sizer);
}
~cleanup() {
auto desired_size = sizer->ComputeFittingClientSize(singletonFrame);
dirty_area.IncTo(desired_size);
//singletonFrame->SetMinClientSize(desired_size);
auto clientSize = singletonFrame->GetClientSize();
desired_size.IncTo(clientSize);
if (desired_size.GetHeight() > clientSize.GetHeight()
|| desired_size.GetWidth() > clientSize.GetWidth()
)singletonFrame->SetClientSize(desired_size);
}
};
void display_wallet::add_name_event_handler(wxCommandEvent& event) {
wxTextEntryDialog dialog(this,
R"("A Zooko name has a human readable name,
@ -114,13 +102,37 @@ and a public key defined by the name and the wallet master secret)",
if (dialog.ShowModal() == wxID_OK)
{
std::string zookoNickname(dialog.GetValue().ToUTF8());
sql_insert_name insert_name(m_db);
auto zookoNickname_psz = zookoNickname.c_str();
insert_name(
auto pubkey = m_MasterSecret(zookoNickname_psz).timesBase();
m_insert_name(
zookoNickname_psz,
m_MasterSecret(zookoNickname_psz).timesBase()
pubkey
);
m_find_position.read_one(zookoNickname_psz);
auto position = m_find_position.column<int64_t>(0);
cleanup cln(this);
m_lSizer->Insert(position,
new wxStaticText(
this,
wxID_ANY,
zookoNickname_psz,
wxDefaultPosition, wxDefaultSize, wxALIGN_RIGHT | wxEXPAND | wxFIXED_MINSIZE | wxST_ELLIPSIZE_END
),
10,
wxALL, // and make border all around
2);
m_rSizer->Insert(position,
new wxStaticText(
this,
wxID_ANY,
"#" + base58(pubkey).operator std::string(),
wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT | wxEXPAND | wxFIXED_MINSIZE | wxST_ELLIPSIZE_END
),
10,
wxALL, // and make border all around
2);
}
}
@ -134,3 +146,47 @@ void display_wallet::OnClose(wxCloseEvent& event) {
if (singletonFrame->m_panel ==this)singletonFrame->m_panel = nullptr;
}
void display_wallet::refresh_from_database() {
cleanup cln(this);
try {
m_read_names_and_keys.reset();
while (m_read_names_and_keys.step() == Icompiled_sql::ROW) {
std::string name = m_read_names_and_keys.column<const char*>(0);
auto pubkey = *(m_read_names_and_keys.column<ristretto255::point>(1));
if (m_MasterSecret(name).timesBase() != pubkey)throw MyException(std::string(sz_public_key_of) + name + sz_fails_to_correspond);
m_lSizer->Add(
new wxStaticText(
this,
wxID_ANY,
name,
wxDefaultPosition, wxDefaultSize, wxALIGN_RIGHT | wxEXPAND| wxFIXED_MINSIZE| wxST_ELLIPSIZE_END
),
10,
wxALL, // and make border all around
2);
m_rSizer->Add(
new wxStaticText(
this,
wxID_ANY,
"#" + base58(pubkey).operator std::string(),
wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT | wxEXPAND | wxFIXED_MINSIZE | wxST_ELLIPSIZE_END
),
10,
wxALL, // and make border all around
2);
}
}
catch (const MyException& e) {
throw MyException(e, __LINE__, __func__, SrcFilename);
// sql exceptions tend to be unintelligible and excessively generic
// because unclear what statement provoked them.
}
catch (const std::exception& e) {
throw MyException(e, __LINE__, __func__, SrcFilename);
}
catch (...) {
szError = sz_unknown_error;
throw MyException(sz_unknown_error, __LINE__, __func__, SrcFilename);
}
}

11
src/display_wallet.h
View File

@ -5,10 +5,14 @@ public:
display_wallet(wxWindow*, wxFileName&);
~display_wallet();
private:
struct cleanup;
typedef MenuLink<display_wallet> MenuLink;
std::unique_ptr<ISqlite3> m_db;
std::unique_ptr <sql_read_from_misc> m_read_from_misc;
std::unique_ptr <ro::sql> m_read_names_and_keys;
ro::dbconnect m_db;
sql_read_from_misc m_read_from_misc;
ro::sql m_read_names_and_keys;
sql_insert_name m_insert_name;
ro::sql m_find_position;
ristretto255::CMasterSecret m_MasterSecret;
wxBoxSizer* m_lSizer;
wxBoxSizer* m_rSizer;
@ -16,4 +20,5 @@ private:
void add_name_event_handler(wxCommandEvent&);
void OnClose(wxCloseEvent& event);
wxMenuTracker m_DisplayWalletEditMenu;
void refresh_from_database();
};

88
src/frame.cpp
View File

@ -10,27 +10,50 @@ wxMenuTracker::wxMenuTracker(const int i) : Menu(new wxMenu), MenuPosition(i) {}
wxMenu* wxMenuTracker::InitialAndFinal[]{ nullptr, new wxMenu, nullptr };
void wxMenuTracker::Replace() {
singletonFrame->GetMenuBar()->Replace(
MenuPosition,
Menu,
menu_strings[MenuPosition].head
);
singletonFrame->GetMenuBar()->EnableTop(MenuPosition, true); //enable edit menu.
auto menuBar = singletonFrame->GetMenuBar();
if ((menuBar->GetMenu(MenuPosition) != Menu)) {
menuBar->Replace(
MenuPosition,
Menu,
menu_strings[MenuPosition].head
);
menuBar->EnableTop(MenuPosition, true); //enable edit menu.
}
};
wxMenuTracker::~wxMenuTracker() {
auto menu_bar = singletonFrame->GetMenuBar();
if (menu_bar->GetMenu(MenuPosition) == Menu) {
auto menuBar = singletonFrame->GetMenuBar();
if (menuBar->GetMenu(MenuPosition) == Menu) {
assert(InitialAndFinal[MenuPosition]);
menu_bar->Replace(
menuBar->Replace(
MenuPosition,
InitialAndFinal[MenuPosition],
menu_strings[MenuPosition].head
);
menu_bar->EnableTop(MenuPosition, false);
menuBar->EnableTop(MenuPosition, false);
delete Menu;
}
};
void wxMenuTracker::check_dynamic_menus_absent() {
if constexpr (debug_mode) {
// Check that the values of all replaceable menus
// are at their default values as if the window handling them
// had just been destroyed and not yet replaced.
auto menuBar = singletonFrame->GetMenuBar();
for (int i = 0; i < std::size(InitialAndFinal); i++) {
assert(
!InitialAndFinal[i]
||
(
InitialAndFinal[i] == menuBar->GetMenu(i)
&&
!menuBar->IsEnabledTop(i)
)
);
}
}
}
// ----------------------------------------------------------------------------
// frame
// ----------------------------------------------------------------------------
@ -199,21 +222,10 @@ Frame::Frame(const wxString& wxs)
SetMenuBar(menuBar);
menuBar->EnableTop(1, false); //disable edit menu.
if constexpr (debug_mode) {
// Check that the initial values of all replaceable menus
// are at their default values as if the window handling them
// had just been destroyed and not yet replaced.
for (int i = 0; i < std::size(wxMenuTracker::InitialAndFinal); i++) {
assert(
!wxMenuTracker::InitialAndFinal[i]
||
(
wxMenuTracker::InitialAndFinal[i] == menuBar->GetMenu(i)
&&
!menuBar->IsEnabledTop(i)
)
);
}
wxMenuTracker::check_dynamic_menus_absent();
// Because the initial values of the dynamic menus are not being deleted by the child windows
// that own the modified windows, they need to be the same as the final values,
// which is to say, the values in wxMenuTracker::InitialAndFinal[]
}
CreateStatusBar();
// child controls
@ -374,17 +386,16 @@ SELECT
"Keys".pubkey AS pubkey
FROM "Names" INNER JOIN "Keys"
ON "Names"."ROWID"="Keys"."id" AND "Keys"."use"=1
ORDER BY LOWER("name"), "name"
COLLATE BINARY;
ORDER BY LOWER("name"), "name" COLLATE BINARY;
COMMIT;
BEGIN IMMEDIATE TRANSACTION;
CREATE TRIGGER InsertUserZookoID INSTEAD OF INSERT ON UserZookoIDs FOR EACH ROW BEGIN
INSERT OR FAIL INTO "Names" VALUES(
INSERT OR ROLLBACK INTO "Names" VALUES(
NULL,
NEW."name"
);
INSERT OR FAIL INTO "Keys" VALUES(
INSERT OR ROLLBACK INTO "Keys" VALUES(
NULL,
NEW."pubkey",
last_insert_rowid(),
@ -555,7 +566,6 @@ void Frame::OnMenuOpen(wxMenuEvent& evt) {
Frame::~Frame() {
assert(singletonFrame == this);
singletonFrame = nullptr;
wxConfigBase& Config = singletonApp->m_Config;
StorePositionToConfig();
Config.SetPath(wxT("/TipOfTheDay"));
@ -567,21 +577,7 @@ Frame::~Frame() {
Config.SetPath(wxT("/"));
Config.Flush();
if constexpr (debug_mode) {
// Check that the final values of all replaceable menus
// are at what they should be because the window handling
// them should have been destroyed.
auto menuBar = this->GetMenuBar();
for (int i = 0; i < std::size(wxMenuTracker::InitialAndFinal); i++) {
assert(
!wxMenuTracker::InitialAndFinal[i]
||
(
wxMenuTracker::InitialAndFinal[i] == menuBar->GetMenu(i)
&&
!menuBar->IsEnabledTop(i)
)
);
}
wxMenuTracker::check_dynamic_menus_absent();
}
singletonFrame = nullptr;
}

1
src/frame.h
View File

@ -21,6 +21,7 @@ struct wxMenuTracker {
// the frame initializer. In the debug build, congruence between the menu bar
// and InitialAndFinal should be checked with assert.
static wxMenu* InitialAndFinal[3];
static void check_dynamic_menus_absent();
wxMenuTracker(wxMenuTracker&&) = delete; // Move constructor
wxMenuTracker(const wxMenuTracker&) = delete; // Copy constructor
wxMenuTracker& operator=(wxMenuTracker&&) = delete; // Move assignment.

1
src/welcome_to_rhocoin.cpp
View File

@ -138,6 +138,7 @@ welcome_to_rhocoin::welcome_to_rhocoin(
Bind(wxEVT_CLOSE_WINDOW, &welcome_to_rhocoin::OnClose, this);
assert(singletonWelcome == nullptr);
singletonWelcome = this;
singletonFrame->SetMinClientSize(sizer->ComputeFittingClientSize(singletonFrame));
}
welcome_to_rhocoin::~welcome_to_rhocoin() {