Prior to this change, it's necessary to implement the entirety of the
`WalletRead` trait in order to be able to use the input selection
functionality provided by `zcash_client_backend::data_api::input_selection`.
This change factors out the minimal operations required for transaction
proposal construction to better reflect the principle of least authority
and make the input selection code reusable in more contexts.
In order to minimize the operations of the newly-created `InputSource`
and `ShieldingSource` traits, this change also removes the
`min_confirmations` field from transaction proposals, in favor of
storing explicit target and anchor heights. This has the effect of
limiting the lifetime of transaction proposals to `PRUNING_DEPTH -
min_confirmations` blocks.
`fetch_params.sh` is now deprecated and the bundled proving parameters
from `wagyu-zcash-parameters` are used everywhere, so the tests should
follow suit.
Fixes#1016
This fixes an API issue whereby it was possible to execute a `Proposal`
with a different value of `min_confirmations` than that with which the
`Proposal` was constructed.
`StandardFeeRule` is an enumeration of the standard fees that have
existed in the history of Zcash zips. It is provided to simplify
transition to new fee strategies; legacy elements of this enumeration
are introduced already-deprecated.
The `v_transactions` view is built upon the set of received notes,
received note values being added to the balance for the transaction and
spent notes being deducted from this balance. This fixes an error
wherein if multiple identically-valued notes were spent in a
transaction, only one of those notes' values was being counted as having
been spent.
The `v_transactions` view is built upon the set of received notes,
received note values being added to the balance for the transaction and
spent notes being deducted from this balance. This fixes an error
wherein if multiple identically-valued notes were spent in a
transaction, only one of those notes' values was being counted as having
been spent.
The existing API limited change outputs to having only a single memo
repeated across each change output. This change makes it so that each
proposed change output can have its own associated memo, and leaves it
up to the input selector to determine how requested change memos are
associated with change outputs.
In order to use `uint64` for amounts that must be nonnegative in the
`proposal.proto` file, it is useful to update fee and change computation
to use `NonNegativeAmount` where possible.
When scanning, a wallet only needs to update balance and transaction
information shown to users when the scan has resulted in a change to
wallet state. This modifies `scan_cached_blocks` to return the range of
block heights actually scanned, along with the counts of notes spent and
received by the wallet in that range.
Fixes#918
We don't need to iterate over them, but the `*_extrema` internal methods
are semantically returning inclusive ranges, and using `RangeInclusive`
avoids bugs where the wrong half of the tuple is used (instead moving
the location of the tuple handling inside the `*_extrema` methods, which
cuts the number of occurrences from linear in the number of function
calls to constant).
The MSRV for the main crates is 1.65, which is higher than the Rust
version that stabilised workplace dependencies (1.64). The implicit MSRV
for the component crates is still lower than this, so we don't migrate
these crates.
Previously we used `Uuid::from_fields` to ensure that the various UUID
fields were correctly constructed, but now that we have a CI lint that
checks this automatically, we can consistently use `Uuid::from_u128`
which is easier to prepare from `uuidgen` output.
Kris Nuttycombe
str4d
Kris Nuttycombe
ebfull
Daira Emma Hopwood
Matthew Watt
Matthew Watt
sasha