9053f64fcb [doc] release notes for random change target (glozow)
46f2fed6c5 [wallet] remove MIN_CHANGE (glozow)
a44236addd [wallet] randomly generate change targets (glozow)
1e52e6bd0a refactor coin selection for parameterizable change target (glozow)
Pull request description:
Closes#24458 - the wallet always chooses 1 million sats as its change target, making it easier to fingerprint transactions created by the Core wallet. Instead of using a fixed value, choose one randomly each time (within a range). Using 50ksat (around $20) as the lower bound and `min(1 million sat, 2 * average payment value)` as the upper bound.
RFC: If the payment is <25ksat, this doesn't work, so we're using the range (payment amount, 50ksat) instead.
ACKs for top commit:
achow101:
ACK 9053f64fcb
Xekyo:
reACK 9053f64fcb
Tree-SHA512: 45ce5d064697065549473347648e29935733f3deffc71a6ab995449431f60302d1f9911a0994dfdb960b48c48b5d8859f168b396ff2a62db67d535a7db041d35
049003fe68 coinselection: Remove COutput operators == and != (Andrew Chow)
f6c39c6adb coinselection: Remove CInputCoin (Andrew Chow)
70f31f1a81 coinselection: Use COutput instead of CInputCoin (Andrew Chow)
14fbb57b79 coinselection: Add effective value and fees to COutput (Andrew Chow)
f0821230b8 moveonly: move COutput to coinselection.h (Andrew Chow)
42e974e15c wallet: Remove CWallet and CWalletTx from COutput's constructor (Andrew Chow)
14d04d5ad1 wallet: Replace CWalletTx in COutput with COutPoint and CTxOut (Andrew Chow)
0ba4d1916e wallet: Provide input bytes to COutput (Andrew Chow)
d51f27d3bb wallet: Store whether a COutput is from the wallet (Andrew Chow)
b799814bbd wallet: Store tx time in COutput (Andrew Chow)
46022953ee wallet: Remove use_max_sig default value (Andrew Chow)
10379f007f scripted-diff: Rename COutput member variables (Andrew Chow)
c7c64db41e wallet: cleanup COutput constructor (Andrew Chow)
Pull request description:
While working on coin selection code, it occurred to me that `CInputCoin` is really a subset of `COutput` and the conversion of a `COutput` to a `CInputCoin` does not appear to be all that useful. So this PR adds fields that are present in `CInputCoin` to `COutput` and replaces the usage of `CInputCoin` with `COutput`.
`COutput` is also moved to coinselection.h. As part of this move, the usage of `CWalletTx` is removed from `COutput`. It is instead replaced by storing a `COutPoint` and the `CTxOut` rather than the entire `CWalletTx` as coin selection does not really need the full `CWalletTx`. The `CWalletTx` was only used for figuring out whether the transaction containing the output was from the current wallet, and for the transaction's time. These are now parameters to `COutput`'s constructor.
ACKs for top commit:
ryanofsky:
Code review ACK 049003fe68, just adding comments and removing == operators since last review
w0xlt:
reACK 049003f
Xekyo:
reACK 049003fe68
Tree-SHA512: 048b4cd620a0415e1d9fe8597257ee4bc64656566e1d28a9bdd147d6d72dc87c3f34a3339fa9ab6acf42c388df7901fc4ee900ccaabc3de790ffad162b544c15
These operators are used only by the tests in std::mismatch. As
std::mismatch can take a binary predicate, we can use a lambda that
achieves the same instead.
Introduces a SelectionResult struct which contains the set of selected
inputs and the total transaction fee for the transaction. This will be
used by the various SelectCoins* functions. Additionally helpers are
provided to compute the total input value and result comparisons.
9d0379cea6 consensus: use <cstdint> over <stdint.h> in amount.h (fanquake)
863e52fe63 consensus: make COIN & MAX_MONEY constexpr (fanquake)
d09071da5b [MOVEONLY] consensus: move amount.h into consensus (fanquake)
Pull request description:
A first step (of a few) towards some source code reorganization, as well as making libbitcoinconsensus slightly more self contained.
Related to #15732.
ACKs for top commit:
MarcoFalke:
concept ACK 9d0379cea6 🏝
Tree-SHA512: 97fc79262dcb8c00996852a288fee69ddf8398ae2c95700bba5b326f1f38ffcfaf8fa66e29d0cb446d9b3f4e608a96525fae0c2ad9cd531ad98ad2a4a687cd6a
3633b667ff Use SelectCoinsSRD if it has less waste (Andrew Chow)
8bf789b4b4 Add SelectCoinsSRD function (Andrew Chow)
2ad3b5d2ad tests: wallet_basic lock needed unspents (Andrew Chow)
b77885f13e tests: wallet_txn explicilty specify inputs (Andrew Chow)
59ba7d2861 tests: rpc_fundrawtx better test for UTXO inclusion with include_unsafe (Andrew Chow)
a165bfbe44 tests: rpc_fundrawtx use specific inputs for unavailable change test (Andrew Chow)
df765a484d tests: rpc_fundrawtx lock to UTXO types (Andrew Chow)
Pull request description:
To ease in the use of SRD as our fallback mechanism, this PR adds it as a secondary fallback algorithm in addition to the knapsack solver. Since #22009, the solution with the least waste will be chosen. This pattern is continued with SRD simply being another solution whose waste is compared.
ACKs for top commit:
glozow:
reACK 3633b66 via `git range-diff 981b9d1...3633b66`, thanks for taking the suggestions
laanwj:
Concept and code review ACK 3633b667ff
Tree-SHA512: 895659f553fea2230990136565bdf18b1328de8b0ce47f06b64bb4d69301f6dd68cb38debe5c24fb6de1317b735fc020a987c541f00bbea65229de47e53adf92
Instead of hijacking the effective_feerate to use the correct value
during coin selection, have OutputGroup be aware of whether we are
subtracting the fee from the outputs and provide the correct value to
use for selection.
To do this, OutputGroup now takes CoinSelectionParams and has a new
function GetSelectionAmount().
The fees for transaction overhead and recipient outputs are now included
in nTargetValue instead of being a separate parameter. For the coin
selection algorithms, it doesn't matter that these are separate as in
either case, the algorithm needs to select enough to cover these fees.
Note that setting nValueToSelect is changed as it now includes
not_input_fees. Without the change to how nValueToSelect is increased
for KnapsackSolver, this would result in overpaying fees. The change to
increase by the difference between nFeeRet and not_input_fees allows
this to have the same behavior as previously.
Additionally, because we assume that KnapsackSolver will always find a
solution that requires change (we assume that BnB always finds a
non-change solution), we also include the fee for the change output in
KnapsackSolver's target. As part of this, we also use the changeless
nFeeRet when iterating for KnapsackSolver. This is because we include
the change fee when doing KnapsackSolver, so nFeeRet on further
iterations won't include the change fee.
Allow RPC users to opt-in to unsafe inputs when funding a raw transaction.
Applications that need to manage a complex RBF flow (such as lightning
nodes using anchor outputs) are very limited if they can only use safe inputs.
Fixes#21299
5d4597666d Rewrite OutputGroups to be clearer and to use scriptPubKeys (Andrew Chow)
f6b3052739 Explicitly filter out partial groups when we don't want them (Andrew Chow)
416d74fb16 Move OutputGroup positive only filtering into Insert (Andrew Chow)
d895e98b59 Move EligibleForSpending into GroupOutputs (Andrew Chow)
99b399aba5 Move fee setting of OutputGroup to Insert (Andrew Chow)
6148a8acda Move GroupOutputs into SelectCoinsMinConf (Andrew Chow)
2acad03657 Remove OutputGroup non-default constructors (Andrew Chow)
Pull request description:
Even after #17458, we still deal with setting fees of an `OutputGroup` and filtering the `OutputGroup` outside of the struct. We currently make all of the `OutputGroup`s in `SelectCoins` and then copy and modify them within each `SelectCoinsMinConf` scenario. This PR changes this to constructing the `OutputGroup`s within the `SelectCoinsMinConf` so that the scenario can be taken into account during the group construction. Furthermore, setting of fees and filtering for effective value is moved into `OutputGroup::Insert` itself so that we don't add undesirable outputs to an `OutputGroup` rather than deleting them afterwards.
To facilitate fee calculation and effective value filtering during `OutputGroup::Insert`, `OutputGroup` now takes the feerates in its constructor and computes the fees and effective value for each output during `Insert`.
While removing `OutputGroup`s in accordance with the `CoinEligibilityFilter` still requires creating the `OutputGroup`s first, we can do that within the function that makes them - `GroupOutput`s.
ACKs for top commit:
Xekyo:
Code review ACK: 5d4597666d
fjahr:
Code review ACK 5d4597666d
meshcollider:
Light utACK 5d4597666d
Tree-SHA512: 35965b6d49a87f4ebb366ec4f00aafaaf78e9282481ae2c9682b515a3a9f2cbcd3cd6e202fee29489d48fe7f3a7cede4270796f5e72bbaff76da647138fb3059
Instead of hacking OutputGroup::m_ancestors to discourage the inclusion
of partial groups via the eligibility filter, add a parameter to the
eligibility filter that indicates whether we want to include the group.
Then for those partial groups, don't return them in GroupOutputs if we
indicate they aren't desired.
OutputGroup will handle the fee and effective value computations
inside of Insert. It now needs to take the effective feerate and long
term feerates as arguments to its constructor.
Instead of having callers set the fees, effective values, and filtering
of outputs, do these within OutputGroups themselves as member functions.
m_fee and m_long_term_fee is added to OutputGroup to track the fees of
the OutputGroup.
Moves the current coin selection algorithm out of SelectCoinsMinConf
and puts it in coinselection.{cpp,h}. The new function, KnapsackSolver,
instead of taking a vector of COutputs, will take a vector of CInputCoins
that is prepared by SelectCoinsMinConf.
Changes CInputCoin to coinselection and to use CTransactionRef in
order to avoid a circular dependency. Also moves other coin selection
specific variables out of wallet.h to coinselectoin.h
