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Diffstat (limited to 'doc/release-notes.md')
| -rw-r--r-- | doc/release-notes.md | 66 |
1 files changed, 20 insertions, 46 deletions
diff --git a/doc/release-notes.md b/doc/release-notes.md index 3a4079e437..967a39a0e7 100644 --- a/doc/release-notes.md +++ b/doc/release-notes.md @@ -1,6 +1,26 @@ (note: this is a temporary file, to be added-to by anybody, and moved to release-notes at release time) +Transaction fee changes +======================= + +This release automatically estimates how high a transaction fee (or how +high a priority) transactions require to be confirmed quickly. The default +settings will create transactions that confirm quickly; see the new +'txconfirmtarget' setting to control the tradeoff between fees and +confirmation times. + +Prior releases used hard-coded fees (and priorities), and would +sometimes create transactions that took a very long time to confirm. + + +New Command Line Options +======================== + +-txconfirmtarget=n : create transactions that have enough fees (or priority) +so they are likely to confirm within n blocks (default: 1). This setting +is over-ridden by the -paytxfee option. + New RPC methods =============== @@ -19,49 +39,3 @@ 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 - |