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wallet: include a suggested number of confirmations based on amount

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This is based on how much an attacking miner stands to lose in block
rewardy by mining a private chain which double spends a payment.
This is not foolproof, since mining is based on luck, and breaks
down as the attacking miner nears 50% of the network hash rate,
and the estimation is based on a constant block reward.
This commit is contained in:
moneromooo-monero 2018-06-02 13:06:41 +01:00
parent a844844cda
commit dcbc17e97e
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
5 changed files with 49 additions and 3 deletions
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4
src/simplewallet/simplewallet.cpp
View file

@ -7408,8 +7408,12 @@ bool simple_wallet::show_transfer(const std::vector<std::string> &args)
if (pd.m_unlock_time < CRYPTONOTE_MAX_BLOCK_NUMBER)
{
uint64_t bh = std::max(pd.m_unlock_time, pd.m_block_height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE);
uint64_t last_block_reward = m_wallet->get_last_block_reward();
uint64_t suggested_threshold = last_block_reward ? (pd.m_amount + last_block_reward - 1) / last_block_reward : 0;
if (bh >= last_block_height)
success_msg_writer() << "Locked: " << (bh - last_block_height) << " blocks to unlock";
else if (suggested_threshold > 0)
success_msg_writer() << std::to_string(last_block_height - bh) << " confirmations (" << suggested_threshold << " suggested threshold)";
else
success_msg_writer() << std::to_string(last_block_height - bh) << " confirmations";
}

13
src/wallet/wallet2.cpp
View file

@ -686,7 +686,8 @@ wallet2::wallet2(network_type nettype, bool restricted):
m_light_wallet_unlocked_balance(0),
m_key_on_device(false),
m_ring_history_saved(false),
m_ringdb()
m_ringdb(),
m_last_block_reward(0)
{
}
@ -1672,6 +1673,7 @@ void wallet2::process_new_blockchain_entry(const cryptonote::block& b, const cry
process_new_transaction(b.tx_hashes[idx], parsed_block.txes[idx], parsed_block.o_indices.indices[idx+1].indices, height, b.timestamp, false, false, false, tx_cache_data[tx_cache_data_offset++]);
}
TIME_MEASURE_FINISH(txs_handle_time);
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
LOG_PRINT_L2("Processed block: " << bl_id << ", height " << height << ", " << miner_tx_handle_time + txs_handle_time << "(" << miner_tx_handle_time << "/" << txs_handle_time <<")ms");
}else
{
@ -3166,6 +3168,7 @@ void wallet2::generate(const std::string& wallet_, const epee::wipeable_string&
cryptonote::block b;
generate_genesis(b);
m_blockchain.push_back(get_block_hash(b));
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
add_subaddress_account(tr("Primary account"));
if (!wallet_.empty())
@ -3224,6 +3227,7 @@ crypto::secret_key wallet2::generate(const std::string& wallet_, const epee::wip
cryptonote::block b;
generate_genesis(b);
m_blockchain.push_back(get_block_hash(b));
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
add_subaddress_account(tr("Primary account"));
if (!wallet_.empty())
@ -3319,6 +3323,7 @@ void wallet2::generate(const std::string& wallet_, const epee::wipeable_string&
cryptonote::block b;
generate_genesis(b);
m_blockchain.push_back(get_block_hash(b));
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
add_subaddress_account(tr("Primary account"));
if (!wallet_.empty())
@ -3371,6 +3376,7 @@ void wallet2::generate(const std::string& wallet_, const epee::wipeable_string&
cryptonote::block b;
generate_genesis(b);
m_blockchain.push_back(get_block_hash(b));
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
add_subaddress_account(tr("Primary account"));
if (!wallet_.empty())
@ -3417,6 +3423,7 @@ void wallet2::restore(const std::string& wallet_, const epee::wipeable_string& p
m_subaddress_lookahead_major = 5;
m_subaddress_lookahead_minor = 20;
}
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
add_subaddress_account(tr("Primary account"));
if (!wallet_.empty()) {
store();
@ -3513,6 +3520,7 @@ std::string wallet2::make_multisig(const epee::wipeable_string &password,
cryptonote::block b;
generate_genesis(b);
m_blockchain.push_back(get_block_hash(b));
m_last_block_reward = cryptonote::get_outs_money_amount(b.miner_tx);
add_subaddress_account(tr("Primary account"));
if (!m_wallet_file.empty())
@ -4015,6 +4023,7 @@ void wallet2::load(const std::string& wallet_, const epee::wipeable_string& pass
if (m_blockchain.empty())
{
m_blockchain.push_back(genesis_hash);
m_last_block_reward = cryptonote::get_outs_money_amount(genesis.miner_tx);
}
else
{
@ -4404,6 +4413,7 @@ void wallet2::rescan_blockchain(bool refresh)
generate_genesis(genesis);
crypto::hash genesis_hash = get_block_hash(genesis);
m_blockchain.push_back(genesis_hash);
m_last_block_reward = cryptonote::get_outs_money_amount(genesis.miner_tx);
add_subaddress_account(tr("Primary account"));
if (refresh)
@ -10006,6 +10016,7 @@ void wallet2::import_blockchain(const std::tuple<size_t, crypto::hash, std::vect
generate_genesis(genesis);
crypto::hash genesis_hash = get_block_hash(genesis);
check_genesis(genesis_hash);
m_last_block_reward = cryptonote::get_outs_money_amount(genesis.miner_tx);
}
//----------------------------------------------------------------------------------------------------
std::vector<tools::wallet2::transfer_details> wallet2::export_outputs() const

10
src/wallet/wallet2.h
View file

@ -762,6 +762,9 @@ namespace tools
void rescan_blockchain(bool refresh = true);
bool is_transfer_unlocked(const transfer_details& td) const;
bool is_transfer_unlocked(uint64_t unlock_time, uint64_t block_height) const;
uint64_t get_last_block_reward() const { return m_last_block_reward; }
template <class t_archive>
inline void serialize(t_archive &a, const unsigned int ver)
{
@ -863,6 +866,9 @@ namespace tools
if(ver < 24)
return;
a & m_ring_history_saved;
if(ver < 25)
return;
a & m_last_block_reward;
}
/*!
@ -1298,9 +1304,11 @@ namespace tools
bool m_ring_history_saved;
std::unique_ptr<ringdb> m_ringdb;
boost::optional<crypto::chacha_key> m_ringdb_key;
uint64_t m_last_block_reward;
};
}
BOOST_CLASS_VERSION(tools::wallet2, 24)
BOOST_CLASS_VERSION(tools::wallet2, 25)
BOOST_CLASS_VERSION(tools::wallet2::transfer_details, 9)
BOOST_CLASS_VERSION(tools::wallet2::multisig_info, 1)
BOOST_CLASS_VERSION(tools::wallet2::multisig_info::LR, 0)

19
src/wallet/wallet_rpc_server.cpp
View file

@ -74,6 +74,21 @@ namespace
}
return pwd_container;
}
//------------------------------------------------------------------------------------------------------------------------------
void set_confirmations(tools::wallet_rpc::transfer_entry &entry, uint64_t blockchain_height, uint64_t block_reward)
{
if (entry.height >= blockchain_height)
{
entry.confirmations = 0;
entry.suggested_confirmations_threshold = 0;
return;
}
entry.confirmations = blockchain_height - entry.height;
if (block_reward == 0)
entry.suggested_confirmations_threshold = 0;
else
entry.suggested_confirmations_threshold = (entry.amount + block_reward - 1) / block_reward;
}
}
namespace tools
@ -258,6 +273,7 @@ namespace tools
entry.type = "in";
entry.subaddr_index = pd.m_subaddr_index;
entry.address = m_wallet->get_subaddress_as_str(pd.m_subaddr_index);
set_confirmations(entry, m_wallet->get_blockchain_current_height(), m_wallet->get_last_block_reward());
}
//------------------------------------------------------------------------------------------------------------------------------
void wallet_rpc_server::fill_transfer_entry(tools::wallet_rpc::transfer_entry &entry, const crypto::hash &txid, const tools::wallet2::confirmed_transfer_details &pd)
@ -284,6 +300,7 @@ namespace tools
entry.type = "out";
entry.subaddr_index = { pd.m_subaddr_account, 0 };
entry.address = m_wallet->get_subaddress_as_str({pd.m_subaddr_account, 0});
set_confirmations(entry, m_wallet->get_blockchain_current_height(), m_wallet->get_last_block_reward());
}
//------------------------------------------------------------------------------------------------------------------------------
void wallet_rpc_server::fill_transfer_entry(tools::wallet_rpc::transfer_entry &entry, const crypto::hash &txid, const tools::wallet2::unconfirmed_transfer_details &pd)
@ -303,6 +320,7 @@ namespace tools
entry.type = is_failed ? "failed" : "pending";
entry.subaddr_index = { pd.m_subaddr_account, 0 };
entry.address = m_wallet->get_subaddress_as_str({pd.m_subaddr_account, 0});
set_confirmations(entry, m_wallet->get_blockchain_current_height(), m_wallet->get_last_block_reward());
}
//------------------------------------------------------------------------------------------------------------------------------
void wallet_rpc_server::fill_transfer_entry(tools::wallet_rpc::transfer_entry &entry, const crypto::hash &payment_id, const tools::wallet2::pool_payment_details &ppd)
@ -322,6 +340,7 @@ namespace tools
entry.type = "pool";
entry.subaddr_index = pd.m_subaddr_index;
entry.address = m_wallet->get_subaddress_as_str(pd.m_subaddr_index);
set_confirmations(entry, m_wallet->get_blockchain_current_height(), m_wallet->get_last_block_reward());
}
//------------------------------------------------------------------------------------------------------------------------------
bool wallet_rpc_server::on_getbalance(const wallet_rpc::COMMAND_RPC_GET_BALANCE::request& req, wallet_rpc::COMMAND_RPC_GET_BALANCE::response& res, epee::json_rpc::error& er)

6
src/wallet/wallet_rpc_server_commands_defs.h
View file

@ -47,7 +47,7 @@
// advance which version they will stop working with
// Don't go over 32767 for any of these
#define WALLET_RPC_VERSION_MAJOR 1
#define WALLET_RPC_VERSION_MINOR 0
#define WALLET_RPC_VERSION_MINOR 1
#define MAKE_WALLET_RPC_VERSION(major,minor) (((major)<<16)|(minor))
#define WALLET_RPC_VERSION MAKE_WALLET_RPC_VERSION(WALLET_RPC_VERSION_MAJOR, WALLET_RPC_VERSION_MINOR)
namespace tools
@ -1194,6 +1194,8 @@ namespace wallet_rpc
cryptonote::subaddress_index subaddr_index;
std::string address;
bool double_spend_seen;
uint64_t confirmations;
uint64_t suggested_confirmation_threshold;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(txid);
@ -1209,6 +1211,8 @@ namespace wallet_rpc
KV_SERIALIZE(subaddr_index);
KV_SERIALIZE(address);
KV_SERIALIZE(double_spend_seen)
KV_SERIALIZE_OPT(confirmations, 0)
KV_SERIALIZE_OPT(suggested_confirmation_threshold, 0)
END_KV_SERIALIZE_MAP()
};