Feature branch for SDK 2.2.0 (#1512)

* cargo update

* rust: Remove unused direct dependencies

* Migrate to Rust 1.79

* Migrate to latest revision of librustzcash crates

* Add ZIP 320 TEX address validation

* Migrate to latest revision of librustzcash crates

This includes support for creating transaction proposals that send to
TEX addresses.

* Fix handling of empty memos

This fixes several existing issues:
- The Rust backend's `proposeTransfer` expected to receive `null` for no
  memo, but was instead receiving an empty array. `proposeShielding`
  meanwhile was always expecting a memo.
- The Kotlin side had nullable byte arrays, but then always converted an
  empty string to an empty byte array instead of `null`.

* Fix Detekt warning

* Changelog update

* Exception reporting issue filed

Filed a follow-up issue #1534

* Add WalletAddress.Tex type

* Another fix of Detekt warning

* Migrate to latest revision of librustzcash crates

* Raise MSRV to 1.80

* Fix clippy lints as of 1.80

* cargo update

* Add `Synchronizer` APIs for USD/ZEC exchange rate

* Exchange rate implementation (#1537)

* Exchange rates API refactor

* Code cleanup

* Demo app updates

* Exchange rate implementation

* Detekt and ktlint checks

* Code cleanup

* Address review comments

* Code cleanup

* Code cleanup

* Tor initialization and disposal (#1560)

* Tor initialization and disposal

* Code cleanup

* Integrate transaction status queue for transparent history

* Fix RawTransactionUnsafe to handle height response correctly

* Migrate to latest revision of librustzcash crates

* Expose transaction_data_requests and set_transaction_status across JNI

* New usage of setTransactionStatus

- Distinct between decryptAndStoreTransaction and setTransactionStatus path by minedHeight
- Convert from RawStatusUnsafe to TransactionStatus
- Add RawTransaction object and related functions
- These changes resolve older issue #1254

* New usage of transactionDataRequests

- New backend.transactionDataRequests and related logic is now used within CompactBlockProcessor
- getTAddressTransactions from LightWalletclient module is now newly used
- These also changes remove now unused querying transactions-related functions from  v_transactions

* Decrypt and store all types of transactions

In case of SpendsFromAddress flow

* Fix passing JniTransactionDataRequest to Kotlin

* Fix ktlint and detekt warnings

* Changelog update

* Code cleanup

* Process SpendsFromAddress on stream

Instead of consuming the stream into list and working with list

* Fix ktlint warnings

* Target latest librustzcash commit

* Move to the latest Rust crates commit

* Change setTransactionStatus trigger

Handle setTransactionStatus by TransactionDataRequest rather then minedHeight

* Fix getTAddressTransactions input range

---------

Co-authored-by: Honza <[email protected]>

* Update to the latest zcash dependencies

- `zcash_address 0.4`
- `zcash_client_backend 0.13`
- `zcash_client_sqlite 0.11`
- `zcash_primitives 0.16`
- `zcash_proofs 0.16`

* Documentation update

* Fetch transaction error handling

* Update CHANGELOG.md

Co-authored-by: Kris Nuttycombe <[email protected]>

* Fix handling of ``OrphanedBlock` in `RawTransactionUnsafeExt`

---------

Co-authored-by: Honza <[email protected]>
Co-authored-by: Milan <[email protected]>
Co-authored-by: Kris Nuttycombe <[email protected]>
Co-authored-by: Kris Nuttycombe <[email protected]>

CHANGELOG.md

@@ -6,9 +6,35 @@ and this library adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+This release adds several important new features:
+- Currency exchange rates (currently just USD/ZEC) are now made available via the SDK.
+  The exchange rate computed as the median of values provided by at least three separate
+  cryptocurrency exchanges, and is fetched over Tor connections in order to avoid leaking
+  the wallet's IP address to the exchanges.
+- Sending to ZIP 320 (TEX) addresses is now supported. When sending to a ZIP 320 address,
+  the wallet will first automatically de-shield the required funds to a fresh ephemeral 
+  transparent address, and then will make a second fully-transparent transaction sending
+  the funds to the eventual recipient that is not linkable via on-chain information to any 
+  other transaction in the  user's wallet.
+- As part of adding ZIP 320 support, the SDK now also provides full support for recovering
+  transparent transaction history. Prior to this release, only transactions belonging to the
+  wallet that contained either some shielded component OR a member of the current
+  transparent UTXO set were included in transaction history.
+
+### Changed
+- Migrated to Rust 1.80.0.
+- `Synchronizer.proposeTransfer` now supports TEX addresses (ZIP 320).
+- Internal transactions-enhancing logic has changed to support the history of transactions made to TEX addresses 
+
 ### Added
+- `Synchronizer.isValidTexAddr` which checks whether the given address is a valid ZIP 320 TEX address
+- `Synchronizer.exchangeRateUsd` is a `StateFlow` containing the latest USD/ZEC
+  exchange rate, along with the `Instant` it was fetched. It can be initialized
+  and refreshed by calling `Synchronizer.refreshExchangeRateUsd()`.
+- `ZatoshiExt.toFiatString` is now a public function
 - `Synchronizer.getFastestServers([LightWalletEndpoint])` is a flow that measures connections to given endpoints and
   returns the three fastest ones
+- `Synchronizer.getTAddressTransactions` returns all the transactions for a given t-address over the given range
 
 ### Changed
 - Checkpoints update