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Add documentation describing CWallet::nTimeSmart.

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Most of the text comes from the 2012 Luke Dashjr <luke-jr+git@utopios.org>
c3f95ef commit message.
This commit is contained in:
Russell Yanofsky 2016-12-19 10:51:45 -05:00
parent 1f98abe47b
commit 6c996c2df7
2 changed files with 30 additions and 0 deletions
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21
src/wallet/wallet.cpp
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@ -3454,6 +3454,27 @@ void CWallet::GetKeyBirthTimes(std::map<CTxDestination, int64_t> &mapKeyBirth) c
mapKeyBirth[it->first] = it->second->GetBlockTime() - 7200; // block times can be 2h off
}
/**
* Compute smart timestamp for a transaction being added to the wallet.
*
* Logic:
* - If sending a transaction, assign its timestamp to the current time.
* - If receiving a transaction outside a block, assign its timestamp to the
* current time.
* - If receiving a block with a future timestamp, assign all its (not already
* known) transactions' timestamps to the current time.
* - If receiving a block with a past timestamp, before the most recent known
* transaction (that we care about), assign all its (not already known)
* transactions' timestamps to the same timestamp as that most-recent-known
* transaction.
* - If receiving a block with a past timestamp, but after the most recent known
* transaction, assign all its (not already known) transactions' timestamps to
* the block time.
*
* For more information see CWalletTx::nTimeSmart,
* https://bitcointalk.org/?topic=54527, or
* https://github.com/bitcoin/bitcoin/pull/1393.
*/
unsigned int CWallet::ComputeTimeSmart(const CWalletTx& wtx) const
{
unsigned int nTimeSmart = wtx.nTimeReceived;

9
src/wallet/wallet.h
View file

@ -260,6 +260,15 @@ public:
std::vector<std::pair<std::string, std::string> > vOrderForm;
unsigned int fTimeReceivedIsTxTime;
unsigned int nTimeReceived; //!< time received by this node
/**
* Stable timestamp that never changes, and reflects the order a transaction
* was added to the wallet. Timestamp is based on the block time for a
* transaction added as part of a block, or else the time when the
* transaction was received if it wasn't part of a block, with the timestamp
* adjusted in both cases so timestamp order matches the order transactions
* were added to the wallet. More details can be found in
* CWallet::ComputeTimeSmart().
*/
unsigned int nTimeSmart;
/**
* From me flag is set to 1 for transactions that were created by the wallet