wallet, rpc: remove settxfee and paytxfee

polespinasa commented at 6:30 pm on March 25, 2025: member

Summary

This PR removes the settxfee RPC and paytxfee setting (Bitcoin Core 31.0). These two features were deprecated in #31278.

DrahtBot commented at 6:30 pm on March 25, 2025: contributor

The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

Code Coverage & Benchmarks

For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/32138.

Reviews

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Type	Reviewers
ACK	w0xlt, rogersala21
Concept ACK	theStack

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Conflicts

Reviewers, this pull request conflicts with the following ones:

#34418 (qa: Make wallet_multiwallet.py Windows-compatible by hodlinator)
#34075 (fees: Introduce Mempool Based Fee Estimation to reduce overestimation by ismaelsadeeq)
#34049 (rpc: Disallow captures in RPCMethodImpl by ajtowns)
#32636 (Split CWallet::Create() into CreateNew and LoadExisting by davidgumberg)
#29278 (Wallet: Add maxfeerate wallet startup option by ismaelsadeeq)
#25722 (refactor: Use util::Result class for wallet loading by ryanofsky)
#19461 (multiprocess: Add bitcoin-gui -ipcconnect option by ryanofsky)
#19460 (multiprocess: Add bitcoin-wallet -ipcconnect option by ryanofsky)
#10102 (Multiprocess bitcoin by ryanofsky)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

LLM Linter (✨ experimental)

Possible places where named args for integral literals may be used (e.g. func(x, /*named_arg=*/0) in C++, and func(x, named_arg=0) in Python):

self.nodes[2].sendtoaddress(address, 10, “”, “”, False, fee_rate=fee_rate_sat_vb) in test/functional/wallet_basic.py
self.nodes[2].sendtoaddress(address, 10, “”, “”, True, fee_rate=fee_rate_sat_vb) in test/functional/wallet_basic.py
self.nodes[2].sendmany(’’, {address: 10}, 0, “”, [], fee_rate=fee_rate_sat_vb) in test/functional/wallet_basic.py
self.nodes[2].sendmany(’’, {address: 10}, 0, “”, [address], fee_rate=fee_rate_sat_vb) in test/functional/wallet_basic.py

2026-01-28 16:13:17

DrahtBot added the label CI failed on Mar 25, 2025

DrahtBot commented at 6:43 pm on March 25, 2025: contributor

🚧 At least one of the CI tasks failed. Debug: https://github.com/bitcoin/bitcoin/runs/39393296960

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

DrahtBot added this to the milestone 31.0 on Mar 25, 2025

DrahtBot marked this as a draft on Mar 25, 2025

polespinasa force-pushed on Mar 25, 2025

polespinasa renamed this:
~~wallet, rpc: (v31.0) remove settxfee and paytxfee (work in progress)~~
wallet, rpc: (v31.0) remove settxfee and paytxfee
on Mar 25, 2025

polespinasa marked this as ready for review on Mar 25, 2025

polespinasa commented at 6:56 pm on March 25, 2025: member

Note to self: re-check all tests

maflcko commented at 7:10 pm on March 25, 2025: member

Please leave this in draft. 31.0 is half a year out, so starting review on this is questionable and won’t help to get it merged earlier anyway

polespinasa renamed this:
~~wallet, rpc: (v31.0) remove settxfee and paytxfee~~
wallet, rpc: (v31.0) remove settxfee and paytxfee (work in progress)
on Mar 25, 2025

polespinasa marked this as a draft on Mar 25, 2025

DrahtBot removed the label CI failed on Mar 25, 2025

fanquake renamed this:
~~wallet, rpc: (v31.0) remove settxfee and paytxfee (work in progress)~~
wallet, rpc: remove settxfee and paytxfee
on Mar 26, 2025

laanwj added the label Wallet on Mar 26, 2025

laanwj added the label RPC/REST/ZMQ on Mar 26, 2025

DrahtBot added the label Needs rebase on Mar 27, 2025

polespinasa commented at 7:25 am on June 24, 2025: member

Will re-open closer to 31.0 release

polespinasa closed this on Jun 24, 2025

maflcko commented at 11:18 am on August 26, 2025: member

Seems fine to pick this up now, if you want.

polespinasa reopened this on Aug 26, 2025

polespinasa force-pushed on Aug 26, 2025

polespinasa marked this as ready for review on Aug 26, 2025

DrahtBot removed the label Needs rebase on Aug 26, 2025

polespinasa force-pushed on Aug 26, 2025

polespinasa commented at 6:08 pm on August 26, 2025: member

5ba260ca74 Rebased on top of master 6ca6f3b37b

polespinasa force-pushed on Aug 26, 2025

DrahtBot added the label CI failed on Aug 26, 2025

DrahtBot commented at 6:11 pm on August 26, 2025: contributor

🚧 At least one of the CI tasks failed. Task lint: https://github.com/bitcoin/bitcoin/runs/48937774714 LLM reason (✨ experimental): Lint failure caused by an invalid Python shebang in test/functional/wallet_txn_clone.py (syntax error).

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

DrahtBot removed the label CI failed on Aug 26, 2025

maflcko commented at 8:48 am on August 28, 2025: member

What is the point of keeping m_pay_tx_fee. It is just dead code now, no?

polespinasa commented at 6:17 pm on August 28, 2025: member

It is just dead code now, no? @maflcko I think you’re right. Will squash after review, think it’s easier this way.

in src/wallet/wallet.h:105 in d3ed01fbc8 outdated

101@@ -102,7 +102,7 @@ void NotifyWalletLoaded(WalletContext& context, const std::shared_ptr<CWallet>&
102 std::unique_ptr<WalletDatabase> MakeWalletDatabase(const std::string& name, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error);
103 
104 //! -paytxfee default (paytxfee RPC was removed in v31.0)
105-constexpr CAmount DEFAULT_PAY_TX_FEE = 0;
106+//constexpr CAmount DEFAULT_PAY_TX_FEE = 0;

polespinasa commented at 6:25 pm on August 28, 2025:

forgot to remove the line, will do next push

maflcko commented at 2:43 pm on September 1, 2025: member

Will squash after review, think it’s easier this way.

I’d say to either squash now, or create meaningful separate commits. E.g:

First, remove from rpc (settxfee, paytxfee result)
Then, remove from cli (-paytxfee, tests only)
Then, remove from cli (-paytxfee, code, and remaining leftovers)

polespinasa force-pushed on Sep 2, 2025

theStack commented at 2:27 pm on January 5, 2026: contributor

Concept ACK

This should have a release note, and IIUC, the following part of the PR description doesn’t apply anymore:

This PR does not remove the internal implementation of the default value of paytxfee=0 but removes the option for users to modify it.

fanquake added the label Needs release note on Jan 5, 2026

rogersala21 commented at 0:04 am on January 18, 2026: none

ACK 76a5e97671177e6f0f08bfd7c2ce13e7b273415d

Tested behavior before and after this PR, code lgtm.

Prior to this PR, settxfee was callable (with deprecation warning). With this PR it is fully removed and returns “Method not found”:

0$ bitcoin-cli settxfee 0.001
1error code: -32601
2error message:
3Method not found

The -paytxfee startup option is also rejected after this PR:

0$ bitcoind -paytxfee=0.001
1Error: Error parsing command line arguments: Invalid parameter -paytxfee=0.001

DrahtBot requested review from theStack on Jan 18, 2026

in doc/release-notes-32138.md:3 in 76a5e97671

0@@ -0,0 +1,3 @@
1+RPC and Startup Option
2+---
3+The `-paytxfee` startup option and the `settxfee` RPC are now deleted after being deprected in Bitcoin Core 30.0. They used to allow the user to set a static fee rate for wallet transactions, which could potentially lead to overpaying or underpaying. Users should instead rely on fee estimation or specify a fee rate per transaction using the `fee_rate` argument in RPCs such as `fundrawtransaction`, `sendtoaddress`, `send`, `sendall`, and `sendmany`. (#32138)

w0xlt commented at 4:18 am on January 27, 2026:

0The `-paytxfee` startup option and the `settxfee` RPC are now deleted after being deprecated in Bitcoin Core 30.0. They used to allow the user to set a static fee rate for wallet transactions, which could potentially lead to overpaying or underpaying. Users should instead rely on fee estimation or specify a fee rate per transaction using the `fee_rate` argument in RPCs such as `fundrawtransaction`, `sendtoaddress`, `send`, `sendall`, and `sendmany`. (#32138)

polespinasa commented at 4:12 pm on January 28, 2026:

Done

w0xlt commented at 4:27 am on January 27, 2026: contributor

There is still a reference to the removed m_pay_tx_fee here:

 0--- a/src/wallet/coincontrol.h
 1+++ b/src/wallet/coincontrol.h
 2@@ -93,7 +93,7 @@ public:
 3     bool m_allow_other_inputs = true;
 4     //! Override automatic min/max checks on fee, m_feerate must be set if true
 5     bool fOverrideFeeRate = false;
 6-    //! Override the wallet's m_pay_tx_fee if set
 7+    //! Override the default wallet fee rate if set
 8     std::optional<CFeeRate> m_feerate;
 9     //! Override the default confirmation target if set
10     std::optional<unsigned int> m_confirm_target;

There’s also a remaining reference in src/qt/bitcoinstrings.cpp, although that file is auto-generated.

0--- a/src/qt/bitcoinstrings.cpp
1+++ b/src/qt/bitcoinstrings.cpp
2@@ -14,7 +14,6 @@ QT_TRANSLATE_NOOP("bitcoin-core", "%s is set very high!"),
3 QT_TRANSLATE_NOOP("bitcoin-core", "%s is set very high! Fees this large could be paid on a single transaction."),
4 QT_TRANSLATE_NOOP("bitcoin-core", "%s request to listen on port %u. This port is considered \"bad\" and thus it is unlikely that any peer will connect to it. See doc/p2p-bad-ports.md for details and a full list."),
5 QT_TRANSLATE_NOOP("bitcoin-core", "-maxmempool must be at least %d MB"),
6-QT_TRANSLATE_NOOP("bitcoin-core", "-paytxfee is deprecated and will be fully removed in v31.0."),
7 QT_TRANSLATE_NOOP("bitcoin-core", "A fatal internal error occurred, see debug.log for details: "),
8 QT_TRANSLATE_NOOP("bitcoin-core", "Assumeutxo data not found for the given blockhash '%s'."),

wallet, rpc:remove settxfee and paytxfee e668863275

release note d51f551101

polespinasa force-pushed on Jan 28, 2026

polespinasa commented at 4:13 pm on January 28, 2026: member

There’s also a remaining reference in src/qt/bitcoinstrings.cpp, although that file is auto-generated.

Is this something I should take into account? Or will it get solved automatically?

achow101 commented at 5:54 pm on January 28, 2026: member

There’s also a remaining reference in src/qt/bitcoinstrings.cpp, although that file is auto-generated.

Is this something I should take into account? Or will it get solved automatically?

No those are cleaned up by the pre-release translations update

w0xlt commented at 6:05 pm on January 28, 2026: contributor

ACK d51f551101a66adbaeebbc0b56270e154a77c399

DrahtBot requested review from rogersala21 on Jan 28, 2026

rogersala21 commented at 6:33 pm on January 30, 2026: none

re-ACK d51f551101a66adbaeebbc0b56270e154a77c399

wallet, rpc: remove settxfee and paytxfee #32138

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