mirror of
https://github.com/dashpay/dash.git
synced 2024-12-27 04:52:59 +01:00
68 lines
2.4 KiB
Markdown
68 lines
2.4 KiB
Markdown
(note: this is a temporary file, to be added-to by anybody, and moved to
|
|
release-notes at release time)
|
|
|
|
New RPC methods
|
|
===============
|
|
|
|
Fee/Priority estimation
|
|
-----------------------
|
|
|
|
estimatefee nblocks : Returns approximate fee-per-1,000-bytes needed for
|
|
a transaction to be confirmed within nblocks. Returns -1 if not enough
|
|
transactions have been observed to compute a good estimate.
|
|
|
|
estimatepriority nblocks : Returns approximate priority needed for
|
|
a zero-fee transaction to confirm within nblocks. Returns -1 if not
|
|
enough free transactions have been observed to compute a good
|
|
estimate.
|
|
|
|
Statistics used to estimate fees and priorities are saved in the
|
|
data directory in the 'fee_estimates.dat' file just before
|
|
program shutdown, and are read in at startup.
|
|
|
|
Double-Spend Relay and Alerts
|
|
=============================
|
|
VERY IMPORTANT: *It has never been safe, and remains unsafe, to rely*
|
|
*on unconfirmed transactions.*
|
|
|
|
Relay
|
|
-----
|
|
When an attempt is seen on the network to spend the same unspent funds
|
|
more than once, it is no longer ignored. Instead, it is broadcast, to
|
|
serve as an alert. This broadcast is subject to protections against
|
|
denial-of-service attacks.
|
|
|
|
Wallets and other bitcoin services should alert their users to
|
|
double-spends that affect them. Merchants and other users may have
|
|
enough time to withhold goods or services when payment becomes
|
|
uncertain, until confirmation.
|
|
|
|
Bitcoin Core Wallet Alerts
|
|
--------------------------
|
|
The Bitcoin Core wallet now makes respend attempts visible in several
|
|
ways.
|
|
|
|
If you are online, and a respend affecting one of your wallet
|
|
transactions is seen, a notification is immediately issued to the
|
|
command registered with `-respendnotify=<cmd>`. Additionally, if
|
|
using the GUI:
|
|
- An alert box is immediately displayed.
|
|
- The affected wallet transaction is highlighted in red until it is
|
|
confirmed (and it may never be confirmed).
|
|
|
|
A `respendsobserved` array is added to `gettransaction`, `listtransactions`,
|
|
and `listsinceblock` RPC results.
|
|
|
|
Warning
|
|
-------
|
|
*If you rely on an unconfirmed transaction, these change do VERY*
|
|
*LITTLE to protect you from a malicious double-spend, because:*
|
|
|
|
- You may learn about the respend too late to avoid doing whatever
|
|
you were being paid for
|
|
- Using other relay rules, a double-spender can craft his crime to
|
|
resist broadcast
|
|
- Miners can choose which conflicting spend to confirm, and some
|
|
miners may not confirm the first acceptable spend they see
|
|
|