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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
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GPG key ID: 686F07454D6CEFC3
5 changed files with 49 additions and 3 deletions
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4
src/simplewallet/simplewallet.cpp
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@ -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";
}