The `MAX` SQLite function returns `null` when the table is empty. The
code was expecting zero rows to be returned in this case, and was trying
to parse the `null` as an integer.
This updates the data access API to provide diversified address
functionality. In order to support this change, the addresses table
is updated to store diversifier index information in big-endian order
to allow sorting by diversifier index, and account initialization
is updated to store the diversifier index accordingly. The currently
unreleased `addresses_table` migration is updated to reflect this
change.
We don't need to store a bunch of copies of the empty memo, and code
should not be depending upon the presence or absence of a memo to
distinguish between different states of transaction retrieval.
The raw serialized transaction data for a transaction is not always
guaranteed to be present, and we cannot correctly calculate the fee
paid by a transaction if we don't have the raw data. For such rows
that contain only transaction metadata, the fee information will be
added at the same time the raw transaction data is added.
This fixes a bug in the logic ported from the Android SDK: it was
possible to remove a transaction in the middle of a chain, which would
cause a long-spent note to become unspent and cause the wallet balance
to be over-counted. We now restrict transaction removal to unmined
transactions, which is sufficient for the Android SDK use cases.
This is to replace the database mutations in the Android SDK. It is
placed behind an `unstable` feature flag until we are satisfied that it
is suitable as a general-purpose API (or replace it).
This adds tests that verifies that migrations can run successfully
against databases in the following states:
* created by release version 0.3.0
* created by the `autoshielding_poc` branch
* created by current `main` prior to addition of migrations
This replaces the current wallet initialization code with a migration
that brings the database up to the state produced by release 0.3.0.
A subsequent commit will add migrations that correctly produce the
database state as of zcash/librustzcash@602270cb1f.
Fixes#369
Nullifier computation only requires the nullifier deriving key,
not the entire Sapling viewing key. This separation of concerns
will be needed for batch decryption when wallet-internal keys
will need to be considered.
Kris Nuttycombe
Jack Grigg
Kris Nuttycombe
Daira Hopwood