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authorDavid A. Harding <dave@dtrt.org>2019-08-19 07:14:32 -1000
committerDavid A. Harding <dave@dtrt.org>2019-08-22 13:21:41 -1000
commite7415a5a95f53abf1f8ffa2085217b249d7caf61 (patch)
treeb05e40d8275aacebc5738f77eb6a6c532c7f2a6e /doc/release-notes-13756.md
parent52b9797119d5ee20b255efc68931ac7e158e325d (diff)
downloadbitcoin-e7415a5a95f53abf1f8ffa2085217b249d7caf61.tar.xz
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-Coin selection
---------------
-
-### Reuse Avoidance
-
-A new wallet flag `avoid_reuse` has been added (default off). When enabled,
-a wallet will distinguish between used and unused addresses, and default to not
-use the former in coin selection.
-
-Rescanning the blockchain is required, to correctly mark previously
-used destinations.
-
-Together with "avoid partial spends" (present as of Bitcoin v0.17), this
-addresses a serious privacy issue where a malicious user can track spends by
-peppering a previously paid to address with near-dust outputs, which would then
-be inadvertently included in future payments.
-
-New RPCs
---------
-
-- A new `setwalletflag` RPC sets/unsets flags for an existing wallet.
-
-
-Updated RPCs
-------------
-
-Several RPCs have been updated to include an "avoid_reuse" flag, used to control
-whether already used addresses should be left out or included in the operation.
-These include:
-
-- createwallet
-- getbalance
-- getbalances
-- sendtoaddress
-
-In addition, `sendtoaddress` has been changed to avoid partial spends when `avoid_reuse`
-is enabled (if not already enabled via the `-avoidpartialspends` command line flag),
-as it would otherwise risk using up the "wrong" UTXO for an address reuse case.
-
-The listunspent RPC has also been updated to now include a "reused" bool, for nodes
-with "avoid_reuse" enabled.