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RELEASE-NOTES
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# Release 4.5.0 (in beta/rc)
* General:
- remove SSL options from config (012ce1c)
- make number of logfiles to keep configurable (5e8b14f)
- refactored SimpleConfig and added ConfigVars (#8454)
- incremental writes of wallet file (#8493)
- add warnings and prompt users when signing txs with non-default sighashes (#8687)
- refactored bip21/bolt11/lnurl/etc-handling into PaymentIdentifiers (#8462)
- add option to merge duplicate outputs (#8474)
* Lightning:
- fix BOLT-04 "MUST set `short_channel_id` to the `short_channel_id` used by the incoming onion" (ca93af2)
- add support for hold invoices (1acf426)
- add support for bundled payments (c4eb7d8)
- various MPP improvements (#7987, ..)
- support large channels (40f2087)
- new flow for normal submarine swaps (fd10ae3)
- the client now uses hold invoices, just like the server
- the client waits until HTLCs are received before going on-chain
- the user may cancel the swaps during that waiting time
- don't create invoice with duplicate route hints (a3997f8)
- don't set channel OPEN before channel_ready has been both sent and received (#8641)
- if trampoline is enabled, do not add non-trampoline nodes to invoices (120faa4)
* QML GUI (Android):
- port to Qt6
- fix regression for lnurl-pay (#8585)
- fix invoice amount bounds check (#8582)
- fix places where text was rendered off-screen for certain translations (#8611)
- fix lnworker undefined when node alias requested (#8635)
- fix BIP39 cosigner script type must be same as primary (8cd95f1)
- better handle android back-gesture (#8464)
- new: show private key in address details (016b5eb)
- new: label sync plugin toggle (b6863b4)
- fix: properly suggest paying BOLT11 invoice onchain if insufficient balance (0a80460)
- new: message sign & verify (e5e1e46)
- new: allow never expiring payment requests (#8631)
- new: add coins/UTXOs to addresses list, add filters (cf91d2e)
- new: delete addresses from imported wallet (#8675)
- new: add support for lightning address and openalias (03dd38b)
- various UI fixes (b846eab, #8634, 9ed5f7b, 941f425, b20a4b9, af61b9d, 0fb47c8, 2995bc8, ..)
* Qt Desktop GUI:
- port wizard to new implementation
- fix fiat balance sorting in address list window (#8469, #8478)
- remove thousands separator when copying numbers to clipboard (#8479)
- new: option to use extra trampoline for legacy payments (b2053c6)
- new: send change to lightning option for on-chain payments (649ce97)
- new: notes tab for saving text in the (encrypted) wallet file (d691aa07)
- various UI fixes (#8587, #6526, ..)
* Hardware wallets:
- Trezor: allow multiple change outputs (#3920)
- Trezor: support external pre-signed inputs (#8324)
- Bitbox02: update to 6.2.0 (#8459)
* Plugins:
- new: swapserver plugin (#8489)
# Release 4.4.6 (August 18, 2023) (security update)
* Lightning:
- security fix: multiple lightning-related security issues have
been fixed. See disclosures:
- https://github.com/spesmilo/electrum/security/advisories/GHSA-9gpc-prj9-89x7
- https://github.com/spesmilo/electrum/security/advisories/GHSA-8r85-vp7r-hjxf
- fix: cannot sweep from channel after local-force-close, if using
imported channel backup (#8536). Fixing this required adding a
new field (local_payment_pubkey) to the channel backup
import/export format and bumping its version number
(v0->v1). Both v0 and v1 can be imported, and we only export v1
backups. When you force close a channel, the GUI will prompt you
to save a backup. In that case, you must export the backup using
the updated Electrum, and not rely on a backup made with an older
release of Electrum. Note that if you request a force close from
the remote node or co-op close, you do not need to save a channel
backup.
- fix: we would sometimes attempt sending MPP even if not supported
by the invoice (2cf6173c)
* QML GUI:
- fix lnurl-pay when config.BTC_AMOUNTS_ADD_THOUSANDS_SEP is True
(5b4df759)
* Hardware wallets:
- Trezor: support longer than 9 character PIN codes (#8526)
- Jade: support more custom-built DIY Jade devices (#8546)
* Builds/binaries:
- include AppStream metainfo.xml in tarballs (#8501)
* fix: exceptions in some callbacks got lost and not logged (3e6580b9)
# Release 4.4.5 (June 20, 2023)
* Hardware wallets:
- jade: fix regression in sign_transaction (#8463)
* Lightning:
- fix "rebalance_channels" function (#8468)
* enforce that we run with python asserts enabled,
regardless of platform (d1c88108)
# Release 4.4.4 (May 31, 2023)
* QML GUI:
- fix creating multisig wallets involving BIP39 seeds (#8432)
- fix "cannot scroll to open a lightning channel" (#8446)
- wizard: "confirm seed" screen to normalize whitespaces (#8442)
- fix assert on address details screen (#8420)
* Qt GUI:
- better handle some expected errors in SwapDialog (#8430)
* libsecp256k1: bump bundled version to 0.3.2 (10574bb1)
# Release 4.4.3 (May 11, 2023)
* Intentionally break multisig wallets that have heterogeneous master
keys. Versions 4.4.0 to 4.4.2 of Electrum for Android did not check
that master keys used the same script type. This may have resulted
in the creation of multisig wallets that cannot be spent from
with any existing version of Electrum. It is not sure whether any
users are affected by this; if there are any, we will publish
instructions on how to spend those coins (#8417, #8418).
* Qt GUI:
- handle expected errors in DSCancelDialog (#8390)
- persist addresses tab toolbar "show/hide" state (b40a608b)
* QML GUI:
- implement bip39 account detection (0e0c7980)
- add share toolbutton for outputs in TxDetails (#8410)
* Hardware wallets:
- Ledger:
- fix old bitcoin app support (<2.1): "no sig for ..." (#8365)
- bump req ledger-bitcoin (0.2.0+), adapt to API change (30204991)
* Lightning:
- limit max feature bit we accept to 10_000 (#8403)
- do not disconnect on "warning" messages (6fade55d)
* fix wallet.get_tx_parents for chain of unconf txs (#8391)
* locale: translate more strings when using "default" lang (a0c43573)
* wallet: persist frozen state of addresses to disk right away (#8389)
# Release 4.4.2 (May 4, 2023)
* Qt GUI:
- fix undefined var check in swap_dialog (#8341)
- really fix "recursion depth exceeded" for utxo privacy analysis (#8315)
* QML GUI:
- fix signing txs for 2fa wallets (#8368)
- fix for wallets with encrypted-keystore but unencrypted-storage (#8374)
- properly delete wizard components after use (#8357)
- avoid entering loadWallet if daemon is already busy loading (#8355)
- no auto capitalization on import and master key text fields (5600375d)
- remove Qt virtual keyboard and add Seedkeyboard for seed entry (#8371, #8352)
- add runtime toggling of android SECURE_FLAG, to allow screenshots (#8351)
- restrict cases where server is shown "lagging" (53d61c01)
* fix hardened char "h" vs "'" needed for some hw wallets (#8364, 499f5153)
* fix digitalbitbox(1) support (22b8c4e3)
* fix wrong type for "history_rates" config option (#8367)
* fix issues with wallet.get_tx_parents (a1bfea61, 56fa8325)
# Release 4.4.1 (April 27, 2023)
* Qt GUI:
- fix sweeping (#8340)
- fix send tab input_qr_from_camera (#8342)
- fix crash reporter showing if send fails on typical errors (#8312)
- bumpfee: disallow targeting an abs fee. only allow feerate (#8318)
* QML GUI:
- fix offline-signing or co-signing pre-segwit txs (#8319)
- add option to show onchain address in ReceiveDetailsDialog (#8331)
- fix strings unique to QML did not get localized/translated (#8323)
- allow paying bip21 uri onchain that has both onchain and bolt11
if we cannot pay on LN (#8334, 312e50e9)
- virtual keyboard: make buttons somewhat larger (75e65c5c)
- fix(?) Android crash with some OS-accessibility settings (#8344)
- fix channelopener.connectStr qr scan popping under (#8335)
- fix restoring from old mpk (watchonly for "old" seeds) (#8356)
* libsecp256k1: add runtime support for 0.3.x, bump bundled to 0.3.1
* forbid paying to "http:" lnurls (enforce https or .onion) (1b5c7d46)
* fix wallet.bump_fee "decrease payment" erroring on too high target
fee rate (#8316)
* fix performance regressions in tx logic (ee521545, 910832c1)
* fix "recursion depth exceeded" for utxo privacy analysis (#8315)
# Release 4.4.0 (April 18, 2023)
* New Android app, using QML instead of Kivy
- Using Qt 5.15.7, PyQt 5.15.9
- This release still on python3.8
- Feature parity with Kivy
- Android Back button used throughout, for cancel/close/back
- Note: two topbar menus; tap wallet name for wallet menu, tap
network orb for application menu
- Note: long-press Receive/Send for list of payment requests/invoices
* Qt GUI improvements
- New onchain transaction creation flow, with configurable preview
- Various options have been moved to toolbars, where their effect
can be more directly observed.
* Privacy features:
- lightning: support for option scid_alias.
- Qt GUI: UTXO privacy analysis: this dialog displays all the
wallet transactions that are either parent of a UTXO, or can be
related to it through address reuse (Note that in the case of
address reuse, it does not display children transactions.)
- Coins tab: New menu that lets users easily spend a selection
of UTXOs into a new channel, or into a submarine swap (Qt GUI).
* Internal:
- Lightning invoices are regenerated everytime routing hints are
deprecated due to liquidity changes.
- Script descriptors are used internally to sign transactions.
# Release 4.3.4 - Copyright is Dubious (January 26, 2023)
* Lightning:
- make sending trampoline payments more reliable (5251e7f8)
- use different trampoline feature bits than eclair (#8141)
* invoice-handling: fix get_request_by_addr incorrectly mapping
addresses to request ids when an address was reused (#8113)
* fix a deadlock in wallet.py (52e2da3a)
* CLI: detect if daemon is already running (c7e2125f)
* add an AppStream metainfo.xml file for Linux packagers (#8149)
* payserver plugin:
-replaced vendored qrcode lib
-added tabs for on-chain and lightning invoices
-revamped html and javascript
# Release 4.3.3 - (January 3, 2023)
* Lightning:
- fix handling failed HTLCs in gossip-based routing (#7995)
- fix LN cooperative-chan-close to witness v1 addr (#8012)
* PSBTs:
- never put ypub/zpub in psbts, only plain xpubs (#8036)
- for witness v0 txins, put both UTXO and WIT_UTXO in psbt (#8039)
* Hardware wallets:
- Trezor: optimize signing speed by not serializing tx (#8058)
- Ledger:
- modify plugin to support new bitcoin app v2.1.0 (#8041),
- added a deprecation warning when using Ledger HW.1 devices.
Ledger itself stopped supporting HW.1 some years ago, and it is
becoming a maintenance burden for us to keep supporting it.
Please migrate away from these devices. Support will be removed
in a future release.
* Binaries:
- tighten build system to only use source pkgs in more places
(#7999, #8000)
- Windows:
- use debian makensis instead of upstream windows exe (#8057)
- stop using debian sid, build missing dep instead (98d29cba)
- AppImage: fix failing to run on certain systems (#8011)
* commands:
- getinfo() to show if running in testnet mode (#8044)
- add a "convert_currency" command (for fiat FX rate) (#8091)
* Qt wizard: fix QR code not shown during 2fa wallet creation (#8071)
* rework Tor-socks-proxy detection to reduce Tor-log-spam (#7317)
* Android: add setting to enable debug logs (#7409)
* fix payserver (merchant) js for electrum 4.3 invoice api (0fc90e07)
* bip21: more robust handling of URIs that include a "lightning" key
(ac1d53f0, 2fd762c3, #8047)
# Release 4.3.2 - (September 26, 2022)
* When creating new requests, reuse addresses of expired requests
(fixes #7927).
* Index requests by ID instead of receiving address. This affects the
following commands: get_request, get_invoice, list_requests,
list_invoices, delete_request, delete_invoice
* Trampoline routing: remember routes that have failed. Try other
routes instead of systematically raising tampoline fees.
* Fix sweep to_local output from channel backup (#7959)
* Harden build script for macOS binary: avoid using
precompiled wheels from PyPI for most packages (#7918)
* The Windows/AppImage/Android binaries are now built on debian using
the snapshot.debian.org archive instead of ubuntu. This should help
with historical reproducibility. (#7926)
# Release 4.3.1 - (August 17, 2022)
* build: we now also distribute a "source-only"
Linux-packager-friendly tarball (d0de44a7, #7594), in addition
to the current "normal" tarball. The "source-only" tarball excludes
compiled locale files, generated protobuf files, and does not
vendor our runtime python dependencies (the packages/ folder).
* fix os.chmod when running in tmpfs on Linux (#7681)
* (Qt GUI) some improvements for high-DPI monitors (38881129)
* bring kivy request dialog more in-line with Qt (#7929)
* rm support of "legacy" (without static_remotekey) LN channels.
Opening these channels were never supported in a release version,
only during development prior to the first lightning-capable
release. Wallets with such channels will have to close them.
(1f403d1c, 7b8e257e)
* Qt: fix duplication of some OS notifications on onchain txs (#7943)
* fix multiple recent regressions:
- handle NotEnoughFunds when trying to pay LN invoice (#7920)
- handle NotEnoughFunds when trying to open LN channel (#7921)
- labels of payment requests were not propagated to
history/addresses (#7919)
- better default labels of outgoing txs (#7942)
- kivy: dust-valued requests could not be created for LN (#7928)
- when closing LN channels, future (timelocked) txs were not
shown in history (#7930)
- kivy: fix deleting "local" tx from history (#7933)
- kivy: fix paying amountless LN invoice (#7935)
- Qt: better handle unparseable URIs (#7941)
# Release 4.3.0 - (August 5, 2022)
* This version introduces a set of UI modifications that simplify the
use of Lightning. The idea is to abstract payments from the payment
layer, and to suggest solutions when a lightning payment is hindered
by liquidity issues.
- Invoice unification: on-chain and lightning invoices have been
merged into a unique type of invoice, and the GUI has a single
'create request' button. Unified invoices contain both a
lightning invoice and an onchain fallback address.
- The receive tab of the GUI can display, for each payment
request, a lightning invoice, a BIP21 URI, or an onchain
address. If the request is paid off-chain, the associated
on-chain address will be recycled in subsequent requests.
- The receive tab displays whether a payment can be received using
Lightning, given the current channel liquidity. If a payment
cannot be received, but may be received after a channel
rebalance or a submarine swap, the GUI will propose such an
operation.
- Similarly, if channels do not have enough liquidity to pay a
lightning invoice, the GUI will suggest available alternatives:
rebalance existing channels, open a new channel, perform a
submarine swap, or pay to the provided onchain fallback address.
- A single balance is shown in the GUI. A pie chart reflects how
that balance is distributed (on-chain, lightning, unconfirmed,
frozen, etc).
- The semantics of the wallet balance has been modified: only
incoming transactions are considered in the 'unconfirmed' part
of the balance. Indeed, if an outgoing transaction does not get
mined, that is not going to decrease the wallet balance. Thus,
change outputs of outgoing transactions are not subtracted from
the confirmed balance. (Before this change, the arithmetic
values of both incoming and outgoing transactions were added to
the unconfirmed balance, and could potentially cancel
each other.)
* In addition, the following new features are worth noting:
- support for the Blockstream Jade hardware wallet (#7633)
- support for LNURL-pay (LUD-06) (#7839)
- updated trampoline feature bit in invoices (#7801)
- the claim transactions of reverse swaps are not broadcast until
the parent transaction is confirmed. This can be overridden by
manually broadcasting the local transaction.
- the fee of submarine swap transactions can be bumped (#7724)
- better error handling for trampoline payments, which should
improve payment success rate (#7844)
- channel backups are removed automatically when the corresponding
channel is redeemed (#7513)
# Release 4.2.2 - (May 27, 2022)
* Lightning:
- watching onchain outputs: significant perf. improvements (#7781)
- enforce relative order of some msgs during chan reestablishment,
lack of which can lead to unwanted force-closures (#7830)
- fix: in case of a force-close containing incoming HTLCs, we were
redeeming all HTLCs that we know the preimage for. This might
publish the preimage of an incomplete MPP. (1a5ef554, e74e9d8e)
* Hardware wallets:
- smarter pairing during sign_transaction (238619f1)
- keepkey: fix pairing with device using a workaround (#7779)
* fix AppImage failing to run on certain systems (#7784)
* fix "Automated BIP39 recovery" not scanning change paths (#7804)
* bypass network proxy for localhost electrum server (#3126)
* security fix: remove support of "file://" URIs from BIP70 payment
requests, which could be used to trigger "open()" on arbitrary files
(see https://github.com/spesmilo/electrum/security/advisories/GHSA-4fh4-hx35-r355)
# Release 4.2.1 - (March 26, 2022)
* Binaries:
- Windows: we are dropping support for Windows 7. (#7728)
Version 4.2.0 already unintentionally broke compatibility with
Win7 and there is no easy way to restore and maintain support.
Existing users can keep using version 4.1.5 for now, but should
consider upgrading or changing their OS.
Win8.1 still works but only Win10 is regularly tested.
- bump bundled Python version (win, mac, appimage) to 3.9.11,
(android) to 3.8.13 (1bb7ef92, #7721)
(note these include a fix to an openssl DOS-vector CVE-2022-0778)
- windows: bump pyinstaller to 4.10 and wine to 7.0 (#7721)
* Kivy GUI:
- fix "Child Pays For Parent" not working on Android (#7723)
- revert to defaulting the UI language to English (25fee6a6)
* Qt GUI:
- macOS: fix opening "Preferences" segfaulting for some (#7725)
- more resilient startup: better error-handling and fallback (#7447)
* Library:
- fix LN error/warning message-handling, and fix regression that
errors during channel-open were not properly shown in GUI (a92dede4)
- during LN chan open, do not backup wallet automatically (#7733)
- Imported wallets: fix delete_address rm-ing too many txs (#7587)
- fix potential deadlock in wallet.py (d3476b6b)
* Hardware wallets:
- ledger: add progress indicator to sign_transaction (#7516)
* fix the "--portable" flag for AppImage, and for pip installs (#7732)
# Release 4.2.0 - (March 16, 2022)
* The minimum python version was increased to 3.8 (#7661)
* Lightning:
- redesigned MPP splitting algorithm (#7202)
- trampoline: implement multi-trampoline MPP (#7623)
- implement option_shutdown_anysegwit, and allow dust limits
below 546 sat (#7542)
- implement option_channel_type (#7636)
- implement modern closing negotiation (#7586, #7680)
* improve support for "lightning:" URIs on all platforms (#7301)
* Qt GUI:
- add setting "show amounts with msat precision" (5891e039)
- add setting "add thousand separators to bitcoin amounts" (#7427)
* CLI/RPC:
- implement Unix sockets and make them the default (#7545, #7566)
- add "bumpfee" command (#7438)
* Kivy GUI:
- show network setup on first start before wallet creation (#7464)
- add "Child Pays For Parent" option (#7487)
- improved locale handling (22bb52d5, 7cb11ced, 4293d6ec)
* Hardware wallets:
- trezor: bump trezorlib to 0.13 (#7590)
- bitbox02: bump bitbox02 to 6.0, support send-to-taproot (#7693)
- ledger: support "Ledger Nano S Plus" (#7692)
* Library:
- added support for sighash types beside "ALL" (#7453)
- signmessage: also accept Trezor-type sigs for segwit addrs (#7668)
- network: make request timeout configurable (#7696)
- paytomany (onchain txout batching) now allows multiple max("!")
amounts with specified weights (#7492)
* Binary builds
- AppImage: changed base image from ubuntu 16.04 to 18.04 (5d0aa63a)
* migrated from Travis CI to Cirrus CI (#7431)
* Lots of other minor bugfixes and usability improvements.
# Release 4.1.5 - (July 19, 2021)
* Builds/binaries:
- macOS: the .dmg binary should now be reproducible
* Kivy/Android: fix paying bip70 invoices (regression) (90579ccf)
* fix: payment requests not saved if process is killed (6a049d99)
* Lightning: improve payment success when using trampoline (3a7f5373)
* add support for signet test network (#7282)
* Qt GUI:
- allow restoring from SLIP39 seeds (#6917)
- rework QR code scanning on Windows and macOS (#7365)
- support smaller window sizes, decrease minimums (#7385)
* GUIs: add "funded or unused" filter option to Addresses tab (#5823)
# Release 4.1.4 - (June 17, 2021)
* Kivy/Android: fix a regression where a non-LN wallet
could not open the settings (c49d6995)
* CLI/RPC: fix "close_wallet" command (#7348)
# Release 4.1.3 - (June 16, 2021)
* Builds/binaries:
- Android: the binaries (APKs) should now be reproducible (#7263)
- AppImage: fix some startup issues by including libxcb deps (#7198)
* Lightning:
- smarter LN pathfinding (if trampoline is disabled):
- estimate liquidity in channels using previous attempts (#7152)
- consider inflight HTLCs and try to route around them (#7292)
- bugfix: add more safety checks to avoid "batch RBF" feature
merging LN funding txs (#7298)
- remove HTLC value upper limit of ~42 mBTC (#7328)
- Kivy GUI: implement freezing LN channels (11bb39ee)
* imported wallets: when enabling the "Use change addresses" option,
change will now be sent to a random unused imported address. (#7330)
As before, by default, change is sent back to the "from address".
* seed generation: make sure newly created electrum seeds don't have
correct bip39 checksum by chance (#6001)
* other minor fixes
# Release 4.1.2 - (April 8, 2021)
* Qt GUI:
- fix some crashes when exiting (#6889)
- make sure pressing Ctrl-C always quits (c41cd4ae)
* Kivy GUI (Android):
- fix bug with scrollbar, again (#7155)
- 2fa wallets: fix making transactions (#7190)
- implement freezing addresses (#7178)
* Android: use more modern application launcher/icon (#7187)
# Release 4.1.1 - (April 2, 2021)
* fix Qt crash with the swap dialog
* fix Kivy bug with scrollbar (#7155)
* fix localization issues (#7158 #4621)
* fix python crash with swaps (#7160)
* other minor fixes
# Release 4.1.0 - Kangaroo (March 30, 2021)
This version is our second major release with support for the
Lightning Network. While our initial Lightning release was mostly
about implementing the protocol, this release brings features that are
specifically aimed at keeping Electrum lightweight and trustless,
while avoiding single points of failure. Most of the features listed
below are user-visible.
* The wallet creation wizard no longer asks for a seed type, and
creates segwit wallets with bech32 addresses. Older seed types can
still be created with the command line.
* Paid invoices (both incoming and outgoing) are automatically
removed from the send/receive lists of the GUI (one confirmation is
needed for onchain invoices). Once removed from the list, invoice
details can still be accessed from the transaction history. In Qt,
invoice lists have been renamed to 'Sending queue' and 'Receiving
queue'.
* Lightning:
- recoverable channels (see below)
- trampoline payments (see below)
- support multi-part-payment
- support upfront-shutdown-script
* Recoverable channels (option):
- Recovery data is added to the channel funding transaction using
an OP_RETURN. This makes it possible to recover a static backup
of the channel from the wallet seed. Please note that static
backups only allow users to request a force-close of the channel
with the remote node, so that funds not locked in HTLCs can be
recovered. This assumes that the remote node is still online, did
not lose its data, and accepts to force close the channel.
- This option is only available for standard wallets with an
Electrum seed. It is not available for hardware wallets, because
it requires a deterministic derivation of the nodeID. It is also
not available in watching-only wallets, for the same reason. If a
wallet can have recoverable channels but has an old nodeID, users
who want to use that feature need to close all their existing
channels, and to restore their wallet from seed.
- Channel recovery data uses 20 bytes (16 bytes of the remote
NodeID plus 4 magic bytes) and is encrypted so that only the
wallet that owns it can decrypt it. However, blockchain analysis
will be able to tell that the transaction was probably created by
Electrum.
- If the 'use recoverable channels' option is enabled, other nodes
cannot open a channel to Electrum.
- If a channel is force-closed, the information in the on-chain
backup is not sufficient to retrieve the funds in the to_local
output, in case the wallet is lost in a boating accident before
expiration of the CSV delay. For that reason, an additional
backup is presented to the user if they force-close a channel.
* Trampoline routing (option): Trampoline is a solution that allows
light clients to delegate path-finding on the Lightning Network, so
that they do not have to download the entire network
graph. Trampoline routing was originally proposed by Bastien
Teinturier and is used in the Phoenix wallet. Here is how
Trampoline works in Electrum:
- Trampoline is enabled by default, in order to prevent unwanted
download of the network gossip. If trampoline is disabled, the
gossip will be downloaded, regardless of the existence of
channels.
- Because there is no discovery mechanism for trampoline nodes, the
list of available trampolines is hardcoded in the client (it will
remain so until support for trampoline routing is announced in
gossip). 3 trampoline nodes are currently available on mainnet:
ACINQ, Electrum and Hodlister.
- If Trampoline is enabled:
- payments use trampoline routing.
- gossip is disabled.
- the wallet can only open channels with trampoline nodes.
- pre-existing channels with non-trampoline nodes are frozen for
sending.
- There are two types of trampoline payments: legacy and trampoline
end-to-end. Legacy payments are possible with any receiver, but
they offer less privacy than end-to-end trampoline
payments. Electrum decides whether to perform legacy or
end-to-end based on the features in the invoice:
- OPTION_TRAMPOLINE_ROUTING_OPT (bit 25) for Electrum
- OPTION_TRAMPOLINE_ROUTING_OPT_ECLAIR (bit 51) for Eclair/Phoenix
- When performing a legacy payment, Electrum will add a second
trampoline node to the route in order to protect the privacy of
the payer and payee. It will fall back to a single trampoline if
the two-trampoline strategy has failed for all trampolines.
(Note: two-trampoline payments are currently not possible if the
first trampoline is the ACINQ node, and is disabled for that
node.)
- Similar to Phoenix, the fee and CLTV delay are found by
trial-and-error. If there is a second trampoline in the route, we
use the same fee/CLTV for both. This trial-and-error is
temporary; the final specification should add fee information in
the failure messages, so that we will be able to better fine-tune
trampoline fees.
* Qt: The increase fee dialog now has advanced options, and offers
the choice between different RBF strategies.
* Watchtowers: The 'use_local_watchtower' feature is deprecated, and
it has been removed from the Qt GUI. The 'use_remote_watchtower'
setting has been renamed to 'use_watchtower'.
* Password unification (Android only): When the Android app is
started, the entered password is checked against all wallets in
the directory. If the test passes:
- all wallets are encrypted
- new wallets will use the unified password
- password updates are performed on all wallets
Whether the password is unified can be seen in the GUI: In the
'Settings' dialog, the description for the password setting is
'Change password for this wallet' if the password is not unified,
and becomes 'Change password' if password is unified.
* Submarine swaps are now available on kivy/android.
* Android PIN reset: If the password is unified, the PIN can be reset
by providing the password.
* Android: on-chain fees have been removed from the settings
dialog. Instead, the fee slider is shown to the user everytime an
on-chain transaction will be performed (sending a payment, opening
a channel, initiating a submarine swap)
* BIP-0350: use bech32m for witness version 1+ addresses (4315fa43).
We have supported sending to any witness version since Electrum
3.0, using BIP-0173 (bech32) addresses. BIP-0350 makes a breaking
change in address encoding, and recommends using a new encoding
(bech32m) for sending to witness version 1 and later.
* Block explorer: allow setting a custom URL in Qt GUI (#6965)
# Release 4.0.9 - (Dec 18, 2020)
* fixes a regression introduced in 4.0.8, that prevents from
paying BIP70 invoices (#6859)
* reflect frozen channels and disconnected peers in the displayed
'can send/can receive' amounts.
# Release 4.0.8 - (Dec 17, 2020)
* fix decoding BIP21 URIs with uppercase schema (d40bedb2)
* psbt: put full derivation paths into PSBT by default (c8155129)
* invoices: allow address-reuse (#6609, #6852)
* A few other minor bugfixes.
# Release 4.0.7 - (Dec 9, 2020)
* kivy: fix open channel with 'max' amount
* kivy: fix regression introduced in last release (a9fc440)
* other minor GUI fixes
* Dependencies: as part of adapting to new dnspython (#6828),
- python-ecdsa is no longer needed at all,
- cryptography is now required (min 2.6), the user can no
longer choose between cryptography and pycryptodomex
# Release 4.0.6 - (Dec 4, 2020)
* Fix 'Max' button issue for submarine swaps button (#6770)
* Fix 'Max' button in kivy (#6169)
* Various fixes for Kivy/Android install wizard
* More robust account keypath for BitBox02 (#6766)
# Release 4.0.5 - (Nov 18, 2020)
* Fix .dmg binary hanging on recently released macOS 11 Big Sur (#6461)
* Lightning:
- bugfix: during LN channel opening, if the client crashed at the
wrong moment, the channel might not get fully persisted to disk,
and would need manual console-tinkering to recover (#6656)
- Lightning is enabled by default. Electrum will not connect to
the Lightning Network until the user opens a channel. (#6639)
- smarter node recommendation (to open channels with) (#6705)
* user interface: some minor changes that aim to improve usability
* Ledger:
- fix enumerating devices with new bitcoin app (1.5.1) (b78cbcff)
- fix compat with HW.1 (200f547a)
* A few other minor bugfixes.
# Release 4.0.4 - (Oct 15, 2020)
* PSBT: fix regression in 4.0.3 where UTXO data was not included in
QR codes (#6600)
* new feature: "Cancel tx" (#6641). The Qt/kivy GUI allows cancelling
an unconfirmed RBF tx by double-spending its inputs to self.
* Windows binary:
- fix some issues with QR scanning by building zbar ourselves (#6593)
- when using setup exe, also install a debug binary (#6603)
* Ledger: fix "The derivation path is unusual" warnings (#6512)
(needs Bitcoin app 1.4.8+ installed on device)
* A few other minor bugfixes and usability improvements.
# Release 4.0.3 - (Sep 11, 2020)
* PSBT: restore compatibility with Bitcoin Core following CVE-2020-14199:
we now allow a PSBT input to have both UTXO and WITNESS_UTXO (#6429).
(PSBTs created since 4.0.1 already contained UTXO for segwit inputs)
* Hardware wallets:
- bitbox02: better multisig UX: implement get_soft_device_id (#6386)
- coldcard: fix "show address" for multisig (#6517)
- all: run all device communication on a dedicated thread (#6561).
This should resolve some threading issues.
* new feature: "Automated BIP39 recovery" (#6219, #6155)
When restoring from a BIP39 seed, add option to scan many known
derivation paths for history, and show them to user to choose from.
* show derivation path of keystores in Qt GUI Wallet>Information (#4700)
* fix "signtransaction" RPC command (#6502)
* Dependencies: pyaes is no longer needed (#6563)
* The tar.gz source dist now bundles make_libsecp256k1.sh, to help
users getting libsecp256k1 (#6323).
* A few other minor bugfixes and usability improvements.
# Release 4.0.2 - (July 8, 2020)
- rm old corrupted non-bip70 invoices (#6345)
- other minor fixes
# Release 4.0.1 - (July 3, 2020)
* Lightning Network support (experimental)
- Our implementation of Lightning relies on Electrum servers to
query channel states. Since servers can lie about the state of a
channel, users should either use a server that they trust, or
setup a private watchtower (see below). A watchtower is also
recommended for lightning wallets that remain offline for
extended periods of time (the default CSV 'to_self_delay' is 1
week). Please note that Electrum Personal Server (EPS) cannot be
used with lightning wallets, because channels funding addresses
are arbitrary.
- Lightning funds cannot be restored from seed. Instead, users need
to create static backups of their channels. Static backups cannot
be used to perform lightning transactions, they can only be used
to trigger a remote-force-close of a channel.
- Lightning-enabled wallet files must not be copied. Instead, a
backup of the wallet can be created from the Qt menu, and it will
contain static backups of all its channels. Backups can also be
exported for each channel (e.g. via QR code), and imported in
another wallet. Since backups are encrypted with a key derived
from the wallet's xpub, they can only be imported into another
instance of the same wallet, or a watch-only version of it. The
force-close is not triggered automatically when the backup is
imported; imported backups can live inside a wallet file.
- Lightning can be enabled in the GUI (Wallet>Information) or from
the CLI (init_lightning). Lightning is currently restricted to HD
p2wpkh wallets (including watch-only and hardware wallets). The
Qt GUI, CLI/RPC, and the kivy GUI (Android) all have LN support,
with feature-richness in that order.
- LN protocol details: dataloss_protect and static_remotekey are
required; varonion and payment_secret are implemented, MPP not yet.
Channels are not announced ('private'), forwarding is disabled.
We do not serve gossip queries, only consume them.
- Submarine swaps: the GUI integrates a service that offers
atomically exchanging on-chain and lightning bitcoins for a fee.
Electrum Technologies runs a central server for this, powered by
the Boltz backend.
- Watchtowers: Electrum can run a local watchtower (GUI setting),
or it can connect to a remote watchtower. A watchtower contains
pre-signed transactions and does not need your private keys. A
local watchtower will watch your channels whenever an Electrum
instance is running, without needing access to your wallet file.
An Electrum daemon can be configured to be used as a remote
watchtower by setting 'watchtower_address', 'watchtower_user' and
'watchtower_password'.
* Partially Signed Bitcoin Transactions (PSBT, BIP-174) are supported
(#5721). The previous Electrum partial transaction format is no
longer supported, i.e. this is an incompatible change. Users should
make sure that all instances of Electrum they use to co-sign or
offline sign, are updated together.
* Hardware wallets: several fixes in general; notable changes:
- The BitBox02 is now supported (#5993)
- Multisig support for Coldcard (#5440)
- Compatibility with latest Trezor fw (#6064, #6198, #5692)
* Dependencies (see README for install instructions):
- libsecp256k1 is now required (previously optional). python-ecdsa
remains a dependency but it is now only used for DNSSEC.
- Added: either one of pycryptodomex or cryptography is now required,
mainly due to LN (previously pycryptodomex was optional, for fast AES)
- Removed: jsonrpclib-pelix, the JSON-RPC library used for CLI/daemon
* Qt GUI: several changes, notably:
- Separation between output selection and transaction finalization.
- Coin selection moved to the Coins tab, and it affects all txns,
e.g. RBF fee-bumping, LN channel opens, submarine swaps.
- Editable tx preview dialog that allows e.g. changing the locktime,
toggling RBF, and manual coinjoins.
* HTTP PayServer: The configuration of a bitcoin-accepting website
using Electrum has been simplified and requires fewer steps (see
documentation). The Payserver supports BIP70 and Lightning payments.
* Android:
- We now build two APKs, one for ARMv7 and one for ARMv8
- The kivy GUI now supports importing BIP39 seeds
- Each wallet on kivy now can have a separate generic password,
using which the wallet files are encrypted. An optional PIN,
shared among all wallets, can be added to get prompted for spends.
* The API of several CLI/RPC commands have changed, and several new
commands have been introduced (mainly for LN).
* Distributables:
- The .tar.gz source dist is now built reproducibly.
Relatedly, we no longer distribute a .zip sdist.
- The MacOS binary now conforms to macOS 10.15; it is notarized
by Apple. This required bumping the min macOS version to 10.13.
Startup times should now be faster on 10.15. (#6128, #6225)
* Transactions:
- we now grind low R for ECDSA signatures to match bitcoind (#5820)
* Lots and lots of other minor bugfixes and improvements.
# Release 3.3.8 - (July 11, 2019)
* fix some bugs with recent bump fee (RBF) improvements (#5483, #5502)
* fix #5491: watch-only wallets could not bump fee in some cases
* appimage: URLs could not be opened on some desktop environments (#5425)
* faster tx signing for segwit inputs for really large txns (#5494)
* A few other minor bugfixes and usability improvements.
# Release 3.3.7 - (July 3, 2019)
* The AppImage Linux x86_64 binary and the Windows setup.exe
(so now all Windows binaries) are now built reproducibly.
* Bump fee (RBF) improvements:
Implemented a new fee-bump strategy that can add new inputs,
so now any tx can be fee-bumped (d0a4366). The old strategy
was to decrease the value of outputs (starting with change).
We will now try the new strategy first, and only use the old
as a fallback (needed e.g. when spending "Max").
* CoinChooser improvements:
- more likely to construct txs without change (when possible)
- less likely to construct txs with really small change (e864fa5)
- will now only spend negative effective value coins when
beneficial for privacy (cb69aa8)
* fix long-standing bug that broke wallets with >65k addresses (#5366)
* Windows binaries: we now build the PyInstaller boot loader ourselves,
as this seems to reduce anti-virus false positives (1d0f679)
* Android: (fix) BIP70 payment requests could not be paid (#5376)
* Android: allow copy-pasting partial transactions from/to clipboard
* Fix a performance regression for large wallets (c6a54f0)
* Qt: fix some high DPI issues related to text fields (37809be)
* Trezor:
- allow bypassing "too old firmware" error (#5391)
- use only the Bridge to scan devices if it is available (#5420)
* hw wallets: (known issue) on Win10-1903, some hw devices
(that also have U2F functionality) can only be detected with
Administrator privileges. (see #5420 and #5437)
A workaround is to run as Admin, or for Trezor to install the Bridge.
* Several other minor bugfixes and usability improvements.
# Release 3.3.6 - (May 16, 2019)
* qt: fix crash during 2FA wallet creation (#5334)
* fix synchronizer not to keep resubscribing to addresses of
already closed wallets (e415c0d9)
* fix removing addresses/keys from imported wallets (#4481)
* kivy: fix crash when aborting 2FA wallet creation (#5333)
* kivy: fix rare crash when changing exchange rate settings (#5329)
* A few other minor bugfixes and usability improvements.
# Release 3.3.5 - (May 9, 2019)
* The logging system has been overhauled (#5296).
Logs can now also optionally be written to disk, disabled by default.
* Fix a bug in synchronizer (#5122) where client could get stuck.
Also, show the progress of history sync in the GUI. (#5319)
* fix Revealer in Windows and MacOS binaries (#5027)
* fiat rate providers:
- added CoinGecko.com and CoinCap.io
- BitcoinAverage now only provides historical exchange rates for
paying customers. Changed default provider to CoinGecko.com (#5188)
* hardware wallets:
- Ledger: Nano X is now recognized (#5140)
- KeepKey:
- device was not getting detected using Windows binary (#5165)
- support firmware 6.0.0+ (#5205)
- Trezor: implemented "seedless" mode (#5118)
* Coin Control in Qt: implemented freezing individual UTXOs
in addition to freezing addresses (#5152)
* TrustedCoin (2FA wallets):
- better error messages (#5184)
- longer signing timeout (#5221)
* Kivy:
- fix bug with local transactions (#5156)
- allow selecting fiat rate providers without historical data (#5162)
* fix CPFP: the fees already paid by the parent were not included in
the calculation, so it always overestimated (#5244)
* Testnet: there is now a warning when the client is started in
testnet mode as there were a number of reports of users getting
scammed through social engineering (#5295)
* CoinChooser: performance of creating transactions has been improved
significantly for large wallets. (d56917f4)
* Importing/sweeping WIF keys: stricter checks (#4638, #5290)
* Electrum protocol: the client's "user agent" has been changed from
"3.3.5" to "electrum/3.3.5". Other libraries connecting to servers
can consider not "spoofing" to be Electrum. (#5246)
* Several other minor bugfixes and usability improvements.
# Release 3.3.4 - (February 13, 2019)
* AppImage: we now also distribute self-contained binaries for x86_64
Linux in the form of an AppImage (#5042). The Python interpreter,
PyQt5, libsecp256k1, PyCryptodomex, zbar, hidapi/libusb (including
hardware wallet libraries) are all bundled. Note that users of
hw wallets still need to set udev rules themselves.
* hw wallets: fix a regression during transaction signing that prompts
the user too many times for confirmations (commit 2729909)
* transactions now set nVersion to 2, to mimic Bitcoin Core
* fix Qt bug that made all hw wallets unusable on Windows 8.1 (#4960)
* fix bugs in wallet creation wizard that resulted in corrupted
wallets being created in rare cases (#5082, #5057)
* fix compatibility with Qt 5.12 (#5109)
# Release 3.3.3 - (January 25, 2019)
* Do not expose users to server error messages (#4968)
* Notify users of new releases. Release announcements must be signed,
and they are verified byElectrum using a hardcoded Bitcoin address.
* Hardware wallet fixes (#4991, #4993, #5006)
* Display only QR code in QRcode Window
* Fixed code signing on MacOS
* Randomise locktime of transactions
# Release 3.3.2 - (December 21, 2018)
* Fix Qt history export bug
* Improve network timeouts
* Prepend server transaction_broadcast error messages with
explanatory message. Render error messages as plain text.
# Release 3.3.1 - (December 20, 2018)
* Qt: Fix invoices tab crash (#4941)
* Android: Minor GUI improvements
# Release 3.3.0 - Hodler's Edition (December 19, 2018)
* The network layer has been rewritten using asyncio and aiorpcx.
In addition to easier maintenance, this makes the client
more robust against misbehaving servers.
* The minimum python version was increased to 3.6
* The blockchain headers and fork handling logic has been generalized.
Clients by default now follow chain based on most work, not length.
* New wallet creation defaults to native segwit (bech32).
* Segwit 2FA: TrustedCoin now supports native segwit p2wsh
two-factor wallets.
* RBF batching (opt-in): If the wallet has an unconfirmed RBF
transaction, new payments will be added to that transaction,
instead of creating new transactions.
* MacOS: support QR code scanner in binaries.
* Android APK:
- build using Google NDK instead of Crystax NDK
- target API 28
- do not use external storage (previously for block headers)
* hardware wallets:
- Coldcard now supports spending from p2wpkh-p2sh,
fixed p2pkh signing for fw 1.1.0
- Archos Safe-T mini: fix #4726 signing issue
- KeepKey: full segwit support
- Trezor: refactoring and compat with python-trezor 0.11
- Digital BitBox: support firmware v5.0.0
* fix bitcoin URI handling when app already running (#4796)
* Qt listings rewritten:
the History tab now uses QAbstractItemModel, the other tabs use
QStandardItemModel. Performance should be better for large wallets.
* Several other minor bugfixes and usability improvements.
# Release 3.2.4 - (December 30, 2018)
* backport anti-phishing measures from master
# Release 3.2.3 - (September 3, 2018)
* hardware wallet: the Safe-T mini from Archos is now supported.
* hardware wallet: the Coldcard from Coinkite is now supported.
* BIP39 seeds: if a seed extension (aka passphrase) contained
multiple consecutive whitespaces or leading/trailing whitespaces
then the derived addresses were not following spec. This has been
fixed, and affected should move their coins. The wizard will show a
warning in this case. (#4566)
* Revealer: the PRNG used has been changed (#4649)
* fix Linux distributables: 'typing' was not bundled, needed for python 3.4
* fix #4626: fix spending from segwit multisig wallets involving a Trezor
cosigner when using a custom derivation path
* fix #4491: on Android, if user had set "uBTC" as base unit, app crashed
* fix #4497: on Android, paying bip70 invoices from cold start did not work
* Several other minor bugfixes and usability improvements.
# Release 3.2.2 - (July 2nd, 2018)
* Fix DNS resolution on Windows
* Fix websocket bug in daemon
# Release 3.2.1 - (July 1st, 2018)
* fix Windows binaries: due to build process changes, the locale files
were not included; the language could not be changed from English
* fix Linux distributables: wordlists were not included (#4475)
# Release 3.2.0 - Satoshi's Vision (June 30, 2018)
* If present, libsecp256k1 is used to speed up elliptic curve
operations. The library is bundled in the Windows, MacOS, and
Android binaries. On Linux, it needs to be installed separately.
* Two-factor authentication is available on Android. Note that this
will only provide additional security if one time passwords are
generated on a separate device.
* Semi-automated crash reporting is implemented for Android.
* Transactions that are dropped from the mempool are kept in the
wallet as 'local', and can be rebroadcast. Previously these
transactions were deleted from the wallet.
* The scriptSig and witness part of transaction inputs are no longer
parsed, unless actually needed. The wallet will no longer display
'from' addresses corresponding to transaction inputs, except for
its own inputs.
* The partial transaction format has been incompatibly changed. This
was needed as for partial transactions the scriptSig/witness has to
be parsed, but for signed transactions we did not want to do the
parsing. Users should make sure that all instances of Electrum
they use to co-sign or offline sign, are updated together.
* Signing of partial transactions created with online imported
addresses wallets now supports significantly more
setups. Previously only online p2pkh address + offline WIF was
supported. Now the following setups are all supported:
- online {p2pkh, p2wpkh-p2sh, p2wpkh} address + offline WIF,