zcash-android-wallet-sdk/CHANGELOG.md

Changelog

All notable changes to this library will be documented in this file.

The format is based on Keep a Changelog, and this library adheres to Semantic Versioning.

[Unreleased]

Added

• SdkSynchronizer.closeFlow() is a Flow-providing version of Synchronizer.close(). It safely closes the Synchronizer together with the related components.
• WalletCoordinator.deleteSdkDataFlow is a Flow-providing function that deletes all the persisted data in the SDK (databases associated with the wallet, all compact blocks, and data derived from those blocks) but preserves the wallet secrets.

[2.1.1] - 2024-04-23

Changed

• The SDK components no longer contain logging statements in the release build
• safelyConvertToBigDecimal() API from CurrencyFormatter.kt now expects decimal separator Char on input
• Gradle 8.7
• Android Gradle Plugin 8.3.0
• Kotlin 1.9.23
• Other dependencies update
• Checkpoints update

[2.1.0] - 2024-04-09

Added

• The Orchard support has been finished, and the SDK now fully supports sending and receiving funds on the Orchard addresses

Fixed

• SDK release 1.11.0-beta01 documented that Synchronizer.new would throw an exception indicating that an internal migration requires the wallet seed, if called with null. This has been unintentionally broken the entire time: the handling logic for this case was accidentally removed shortly after it was added. The SDK now correctly throws InitializeException.SeedRequired.

Changed

• Synchronizer.refreshAllBalances now refreshes the Orchard balances as well
• The SDK uses ZIP-317 fee system internally
• ZcashSdk.MINERS_FEE has been deprecated, and will be removed in 2.1.x
• ZecSend data class now provides Proposal? object initiated using Synchronizer.proposeTransfer
• Wallet initialization using Synchronizer.new now could throw a new SeedNotRelevant exception when the provided seed is not relevant to any of the derived accounts in the wallet database
• Checkpoints update

[2.0.7] - 2024-03-08

Fixed

• Synchronizer.sendToAddress and Synchronizer.shieldFunds now throw an exception if the created transaction successfully reaches lightwalletd but fails to reach its backing full node's mempool.

Changed

• WalletBalance now contains new fields changePending and valuePending. Fields total and pending are still provided. See more in the class documentation sdk-lib/src/main/java/cash/z/ecc/android/sdk/model/WalletBalance.kt
• Synchronizer.transparentBalances: WalletBalance to Synchronizer.transparentBalance: Zatoshi
• WalletSnapshot.transparentBalance: WalletBalance to WalletSnapshot.transparentBalance: Zatoshi
• Memo.MAX_MEMO_LENGTH_BYTES is now available in public API
• Synchronizer.sendToAddress and Synchronizer.shieldFunds have been deprecated, and will be removed in 2.1.x (which will create multiple transactions at once for some recipients).

Added

• APIs that enable constructing a proposal for transferring or shielding funds, and then creating transactions from a proposal. The intermediate proposal can be used to determine the required fee, before committing to producing transactions.
  • Synchronizer.proposeTransfer
  • Synchronizer.proposeShielding
  • Synchronizer.createProposedTransactions
• WalletBalanceFixture class with mock values that are supposed to be used only for testing purposes
• Memo.countLength(memoString: String) to count memo length in bytes
• PersistableWallet.toSafeString is a safe alternative for the regular [toString] function that prints only non-sensitive parts
• Synchronizer.validateServerEndpoint this function checks whether the provided server endpoint is valid. The validation is based on comparing:
  • network type
  • sapling activation height
  • consensus branch id

[2.0.6] - 2024-01-30

Fixed

• In 2.0.5, Synchronizer.shieldFunds always returned an error due to a crash on the Rust side. This release fixes the underlying bug.

[2.0.5] - 2024-01-30

Added

• cash.z.ecc.android.sdk.model.Proposal (currently unused in the public API).
• System tracing to CompactBlockProcessor and the Rust backend.

Changed

• Migrated to NDK 26.1.10909125 and Rust 1.75.0.
• The wallet balances are now updated immediately upon synchronizer start.
• Existing wallets will now only fetch the most recent subtree roots, improving synchronizer startup times.
• Performance of block scanning and SdkSynchronizer.refreshAllBalances has been improved.
• WalletAddressFixture fixture properties have been updated

Fixed

• The transparent wallet balance StateFlow now shows the total transparent balance in the wallet, instead of the balance of the default address. It also now treats all zero-conf balance as available.

Removed

• SdkSynchronizer.refreshSaplingBalance and SdkSynchronizer.refreshTransparentBalance (use SdkSynchronizer.refreshAllBalances instead).

[2.0.4] - 2024-01-08

Added

• TransactionOverview.txIdString() to provide a readable transaction ID to SDK-consuming apps
• MonetarySeparators.current(locale: Locale? = null) now accepts Locale on input to force separators locale. If no value is provided, the default one is used.

Removed

• LightWalletEndpointExt and its functions and variables were removed from the SDK's public APIs entirely. It's preserved only for testing and wallet Demo app purposes. The calling wallet app should provide its own LightWalletEndpoint instance within PersistableWallet or SdkSynchronizer APIs.

Changed

• Gradle 8.5
• Kotlin 1.9.21
• Other dependency update
• Checkpoints update

Removed

• Several internally unused exceptions from Exceptions.kt

[2.0.3] - 2023-11-08

Added

• Synchronizer.getExistingDataDbFilePath public API to check and provide file path to the existing data database file or throws [InitializeException.MissingDatabaseException] if the database doesn't exist yet. See #1292.

Changed

• CompactBlockProcessor switched internally from balance and progress FFIs to wallet summary FFI APIs. This change brings a block synchronization speed up. No action is required on the client side. See #1282.
• Checkpoints update

[2.0.2] - 2023-10-20

Fixed

• Incorrect note deduplication in the v_transactions database view: This is a fix in the Rust layer. The amount sent in the transaction was incorrectly reported even though the actual amount was correctly sent. Now, clients should see the amount they expect to see.

Changed

• Checkpoints update

[2.0.1] - 2023-10-02

Changed

• PersistableWallet API provides a new endpoint parameter of type LightWalletEndpoint, which could be used for the Lightwalletd server customization. The new parameter is part of PersistableWallet persistence. The SDK handles the persistence migration internally.
• The 1_000 Zatoshi fee proposed in ZIP-313 is deprecated now, so the minimum is 10_000 Zatoshi, defined in ZIP-317—the ZcashSdk.MINERS_FEE now returns the correct value as described above. Note that the actual fee is handled in a rust layer.
• Adopted the latest Bip39 library v1.0.6

[2.0.0] - 2023-09-25

[2.0.0-rc.4] - 2023-09-22

Fixed

Transparent balance is now correctly updated after a shielding transaction is created, instead of only once the transaction is mined.

[2.0.0-rc.3] - 2023-09-21

Fixed

The Kotlin layer of the SDK now correctly matches the Rust layer PrevHashMismatch exception with ContinuityError and triggers rewind action.

[2.0.0-rc.2] - 2023-09-20

Changed

• Some of the TransactionOverview class parameters changed:
  • id was removed
  • index is nullable
  • feePaid is nullable
  • blockTimeEpochSeconds is nullable

Removed

• Block heights are absolute, not relative. Thus, these two operations above the BlockHeight object were removed:
  • plus(other: BlockHeight): BlockHeight
  • minus(other: BlockHeight): BlockHeight

[2.0.0-rc.1] - 2023-09-12

Notable Changes

• CompactBlockProcessor now processes compact blocks from the lightwalletd server using the Spend-before-Sync algorithm, which allows scanning of wallet blocks to be performed in arbitrary order and optimized to make it possible to spend received notes without waiting for synchronization to be complete. This feature shortens the time until a wallet's spendable balance can be used.
• The block synchronization mechanism is additionally about one-third faster thanks to an optimized CompactBlockProcessor.SYNC_BATCH_SIZE (issue #1206).

Removed

• CompactBlockProcessor.ProcessorInfo.lastSyncHeight no longer had a well-defined meaning after implementation of the SpendBeforeSync synchronization algorithm and has been removed. CompactBlockProcessor.ProcessorInfo.overallSyncRange provides related information.
• CompactBlockProcessor.ProcessorInfo.isSyncing. Use Synchronizer.status instead.
• CompactBlockProcessor.ProcessorInfo.syncProgress. Use Synchronizer.progress instead.
• alsoClearBlockCache parameter from rewind functions of Synchronizer and CompactBlockProcessor, as it has no effect on the current behaviour of these functions.
• Internally, we removed access to the shared block table from the Kotlin layer, which resulted in eliminating these APIs:
  • SdkSynchronizer.findBlockHash()
  • SdkSynchronizer.findBlockHashAsHex()

Changed

• CompactBlockProcessor.quickRewind() and CompactBlockProcessor.rewindToNearestHeight() now might fail due to internal changes in getting scanned height. Thus, these functions now return Boolean results.
• Synchronizer.new() and PersistableWallet APIs require a new walletInitMode parameter of type WalletInitMode, which describes wallet initialization mode. See related function and sealed class documentation.

Fixed

• Synchronizer.getMemos() now correctly returns a flow of strings for sent and received transactions. Issue #1154.
• CompactBlockProcessor now triggers transaction polling while block synchronization is in progress as expected. Clients will be notified shortly after every new transaction is discovered via Synchronizer.transactions API. Issue #1170.

[1.21.0-beta01]

Note: This is the last 1.x version release. The upcoming version 2.0 brings the Spend-before-Sync feature, which speeds up discovering the wallet's spendable balance.

Changed

• Updated dependencies:
  • Gradle 8.3
  • AGP 8.1.1
  • Kotlin 1.9.10
  • Coroutines 1.7.3
  • Compose
  • AndroidX
  • gRPC/Protobuf
  • etc.
• Checkpoints

1.20.0-beta01

• The SDK internally migrated from BackendExt rust backend extension functions to more type-safe TypesafeBackend.
• Synchronizer.getMemos() now internally handles expected RuntimeException from the rust layer and transforms it in an empty string.

1.19.0-beta01

Changed

• Adopted the latest Bip39 version 1.0.5

Fixed

• TransactionOverview object returned with SdkSynchronizer.transactions now contains a correct TransactionState. Pending in case of the transaction is mined,but not fully confirmed.
• When the SDK internally works with a recently created transaction there was a moment in which could the transaction causes the SDK to crash, because of its invalid mined height. Fixed now.

1.18.0-beta01

• Synchronizer's functions getUnifiedAddress, getSaplingAddress, getTransparentAddress, and refreshUtxos now do not provide Account.DEFAULT value for the account argument. As accounts are not fully supported by the SDK yet, the caller should explicitly set Account.DEFAULT as the account argument to keep the same behavior.
• Gradle 8.1.1
• AGP 8.0.2

1.17.0-beta01

• Transparent fund balances are now displayed almost immediately
• Synchronization of shielded balances and transaction history is about 30% faster
• Disk space usage is reduced by about 90%
• Synchronizer.status has been simplified by combining DOWNLOADING, VALIDATING, and SCANNING states into a single SYNCING state.
• Synchronizer.progress now returns Flow<PercentDecimal> instead of Flow<Int>. PercentDecimal is a type-safe model. Use PercentDecimal.toPercentage() to get a number within 0-100% scale.
• Synchronizer.clearedTransactions has been renamed to Synchronizer.transactions and includes sent, received, and pending transactions. Synchronizer APIs for listing sent, received, and pending transactions have been removed. Clients can determine whether a transaction is sent, received, or pending by filtering the TransactionOverview objects returned by Synchronizer.transactions
• Synchronizer.send() and shieldFunds() are now suspend functions with Long return values representing the ID of the newly created transaction. Errors are reported by thrown exceptions.
• DerivationTool is now an interface, rather than an object, which makes it easier to inject alternative implementations into tests. To adapt to the new API, replace calls to DerivationTool.methodName() with DerivationTool.getInstance().methodName().
• DerivationTool methods are no longer suspending, which should make it easier to call them in various situations. Obtaining a DerivationTool instance via DerivationTool.getInstance() frontloads the need for a suspending call.
• DerivationTool.deriveUnifiedFullViewingKeys() no longer has a default argument for numberOfAccounts. Clients should now pass DerivationTool.DEFAULT_NUMBER_OF_ACCOUNTS as the value. Note that the SDK does not currently have proper support for multiple accounts.
• The SDK's internals for connecting with librustzcash have been refactored to a separate Gradle module backend-lib (and therefore a separate artifact) which is a transitive dependency of the Zcash Android SDK. SDK consumers that use Gradle dependency locks may notice this difference, but otherwise it should be mostly an invisible change.

1.16.0-beta01

(This version was only deployed as a snapshot and not released on Maven Central)

Changed

• The minimum supported version of Android is now API level 27.

1.15.0-beta01

Changed

• A new package sdk-incubator-lib is now available as a public API. This package contains experimental APIs that may be promoted to the SDK in the future. The APIs in this package are not guaranteed to be stable, and may change at any time.
• Synchronizer.refreshUtxos now takes Account type as first parameter instead of transparent address of type String, and thus it downloads all UTXOs for the given account addresses. The Account object provides a default 0 index Account with Account.DEFAULT.

1.14.0-beta01

Changed

• The minimum supported version of Android is now API level 24.

1.13.0-beta01

Changed

• The SDK's internal networking has been refactored to a separate Gradle module lightwallet-client-lib (and therefore a separate artifact) which is a transitive dependency of the Zcash Android SDK.
  • The z.cash.ecc.android.sdk.model.LightWalletEndpoint class has been moved to co.electriccoin.lightwallet.client.model.LightWalletEndpoint
  • The new networking module now provides a LightWalletClient for asynchronous calls.
  • Most unary calls respond with the new Response class and its subclasses. Streaming calls will be updated with the Response class later.
  • SDK clients should avoid using generated GRPC objects, as these are an internal implementation detail and are in process of being removed from the public API. Any clients using GRPC objects will find these have been repackaged from cash.z.wallet.sdk.rpc to cash.z.wallet.sdk.internal.rpc to signal they are not a public API.

1.12.0-beta01

Changed

• TransactionOverview, Transaction.Sent, and Transaction.Received have minedHeight as a nullable field now. This fixes a potential crash when fetching transactions when a transaction is in the mempool

1.11.0-beta01

Added

• cash.z.ecc.android.sdk:
  • Synchronizer.getUnifiedAddress
  • Synchronizer.getSaplingAddress
  • Synchronizer.isValidUnifiedAddr
  • Synchronizer.getMemos(TransactionOverview)
  • Synchronizer.getReceipients(TransactionOverview)
• cash.z.ecc.android.sdk.model:
  • Account
  • FirstClassByteArray
  • PendingTransaction
  • Transaction
  • UnifiedSpendingKey
• cash.z.ecc.android.sdk.tool:
  • DerivationTool.deriveUnifiedSpendingKey
  • DerivationTool.deriveUnifiedFullViewingKey
  • DerivationTool.deriveTransparentAccountPrivateKey
  • DerivationTool.deriveTransparentAddressFromAccountPrivateKey
  • DerivationTool.deriveUnifiedAddress
  • DerivationTool.deriveUnifiedFullViewingKeys
  • DerivationTool.validateUnifiedFullViewingKey
    • Still unimplemented.
• cash.z.ecc.android.sdk.type:
  • AddressType.Unified
  • UnifiedFullViewingKey, representing a Unified Full Viewing Key as specified in ZIP 316.

Changed

• The following methods now take or return UnifiedFullViewingKey instead of UnifiedViewingKey:
  • cash.z.ecc.android.sdk:
    • Initializer.Config.addViewingKey
    • Initializer.Config.importWallet
    • Initializer.Config.newWallet
    • Initializer.Config.setViewingKeys
• cash.z.ecc.android.sdk:
  • Synchronizer.Companion.new now takes many of the arguments previously passed to Initializer. In addition, an optional seed argument is required for first-time initialization or if Synchronizer.new throws an exception indicating that an internal migration requires the wallet seed. (This second case will be true the first time existing clients upgrade to this new version of the SDK).
  • Synchronizer.new() now returns an instance that implements the Closeable interface. Synchronizer.stop() is effectively renamed to Synchronizer.close()
  • Synchronizer ensures that multiple instances cannot be running concurrently with the same network and alias
  • Synchronizer.sendToAddress now takes a UnifiedSpendingKey instead of an encoded Sapling extended spending key, and the fromAccountIndex argument is now implicit in the UnifiedSpendingKey.
  • Synchronizer.shieldFunds now takes a UnifiedSpendingKey instead of separately encoded Sapling and transparent keys.
  • Synchronizer methods that previously took an Int for account index now take an Account object
  • Synchronizer.sendToAddress() and Synchronizer.shieldFunds() return flows that can now be collected multiple times. Prior versions of the SDK had a bug that could submit transactions multiple times if the flow was collected more than once.
• Updated dependencies:
  • Kotlin 1.7.21
  • AndroidX
  • etc.
• Updated checkpoints

Removed

• cash.z.ecc.android.sdk:
  • Initializer (use Synchronizer.new instead)
  • Synchronizer.start() - Synchronizer is now started automatically when constructing a new instance.
  • Synchronizer.getAddress (use Synchronizer.getUnifiedAddress instead).
  • Synchronizer.getShieldedAddress (use Synchronizer.getSaplingAddress instead)
  • Synchronizer.cancel
  • Synchronizer.cancelSpend
• cash.z.ecc.android.sdk.type.UnifiedViewingKey
  • This type had a bug where the extpub field actually was storing a plain transparent public key, and not the extended public key as intended. This made it incompatible with ZIP 316.
• cash.z.ecc.android.sdk.tool:
  • DerivationTool.deriveSpendingKeys (use DerivationTool.deriveUnifiedSpendingKey instead)
  • DerivationTool.deriveViewingKey (use DerivationTool.deriveUnifiedFullViewingKey instead)
  • DerivationTool.deriveTransparentAddress (use Synchronizer.getLegacyTransparentAddress instead).
  • DerivationTool.deriveTransparentAddressFromPrivateKey (use Synchronizer.getLegacyTransparentAddress instead).
  • DerivationTool.deriveTransparentAddressFromPublicKey (use Synchronizer.getLegacyTransparentAddress instead).
  • DerivationTool.deriveTransparentSecretKey (use DerivationTool.deriveUnifiedSpendingKey instead).
  • DerivationTool.deriveShieldedAddress
  • DerivationTool.deriveUnifiedViewingKeys (use DerivationTool.deriveUnifiedFullViewingKey instead)
  • DerivationTool.validateUnifiedViewingKey

Version 1.9.0-beta05

• The minimum version of Android supported is now API 21
• Fixed R8/ProGuard consumer rule, which eliminates a runtime crash for minified apps

Version 1.9.0-beta04

• The SDK now stores sapling param files in no_backup/co.electricoin.zcash folder instead of the cache/params folder. Besides that, SaplingParamTool also does validation of downloaded sapling param file hash and size. No action required from client app.

Version 1.9.0-beta03

• No changes; this release is a test of a new deployment process

Version 1.9.0-beta02

• The SDK now stores database files in no_backup/co.electricoin.zcash folder instead of the database folder. No action required from client app.

Version 1.9.0-beta01

• Split ZcashNetwork into ZcashNetwork and LightWalletEndpoint to decouple network and server configuration
• Gradle 7.5.1
• Updated checkpoints

Version 1.8.0-beta01

• Enabled automated unit tests run on the CI server
• Added BlockHeight typesafe object to represent block heights
• Significantly reduced memory usage, fixing potential OutOfMemoryError during block download
• Kotlin 1.7.10
• Updated checkpoints

Version 1.7.0-beta01

• Added Zatoshi typesafe object to represent amounts.
• Kotlin 1.7.0

Version 1.6.0-beta01

• Updated checkpoints for Mainnet and Testnet
• Fix: SDK can now be used on Intel x86_64 emulators
• Prevent R8 warnings for apps consuming the SDK

Version 1.5.0-beta01

• New: Transactions can be created after NU5 activation.
• New: Support for receiving v5 transactions.
• Known issues: The SDK will not run on Intel 64-bit API 31+ emulators. Workarounds include: testing on a physical device, using an older 32-bit API version Intel emulator, or using an ARM emulator.

Version 1.4.0-beta01

• Main entrypoint to the SDK has changed. See MIGRATIONS.md
• The minimum version of Android supported is now API 19
• Updated checkpoints for Mainnet and Testnet
• Internal bugfixes around concurrent access to resources, which could cause transient failures and data corruption
• Added ProGuard rules so that SDK clients can use R8 to shrink their apps
• Updated dependencies, including Kotlin 1.6.21, Coroutines 1.6.1, GRPC 1.46.0, Okio 3.1.0, NDK 23
• Known issues: The SDK will not run on Intel 64-bit API 31+ emulators. Workarounds include: testing on a physical device, using an older 32-bit API version Intel emulator, or using an ARM emulator.

Version 1.3.0-beta20

• New: Updated checkpoints for Mainnet and Testnet

Version 1.3.0-beta19

• New: Updated checkpoints for Mainnet and Testnet
• Fix: Repackaged internal classes to a new internal package name
• Fix: Testnet checkpoints have been corrected
• Updated dependencies

Version 1.3.0-beta18

• Fix: Corrected logic when calculating birthdates for wallets with zero received notes.

Version 1.3.0-beta17

• Fix: Autoshielding confirmation count error so funds are available after 10 confirmations.
• New: Allow developers to enable Rust logs.
• New: Accept GZIP compression from lightwalletd.
• New: Reduce the UTXO retry time.

Version 1.3.0-beta16

• Fix: Gracefully handle failures while fetching UTXOs.
• New: Expose StateFlows for balances.
• New: Make it easier to subscribe to transactions.
• New: Cleanup default logs.
• New: Convenience functions for WalletBalance objects.

Version 1.3.0-beta15

• Fix: Increase reconnection attempts on failed app restart.
• New: Updated checkpoints for testnet and mainnet.

Version 1.3.0-beta14

• New: Add separate flows for sapling, orchard and tranparent balances.
• Fix: Continue troubleshooting and fixing server disconnects.
• Updated dependencies.

Version 1.3.0-beta12

• New: Expose network height as StateFlow.
• Fix: Reconnect to lightwalletd when a service exception occurs.

Version 1.3.0-beta11

• Fix: Remove unused flag that was breaking new wallet creation for some wallets.

Version 1.3.0-beta10

• Fix: Make it safe to call the new prepare function more than once.

Version 1.3.0-beta09

• New: Add quick rewind feature, which makes it easy to rescan blocks after an upgrade.
• Fix: Repair complex data migration bug that caused crashes on upgrades.

Version 1.3.0-beta08

• Fix: Disable librustzcash logs by default.

Version 1.3.0-beta07

• Fix: Address issues with key migration, allowing wallets to reset viewing keys, when needed.

Version 1.3.0-beta06

• Fix: Repair publishing so that AARs work on Windows machines [issue #222].
• Fix: Incorrect BranchId on 32-bit devics [issue #224].
• Fix: Rescan should not go beyond the wallet checkpoint.
• New: Drop Android Jetifier since it is no longer used.
• Updated checkpoints, improved tests (added Test Suites) and better error messages.

Version 1.3.0-beta05

• Major: Consolidate product flavors into one library for the SDK instead of two.
• Major: Integrates with latest Librustzcash including full Data Access API support.
• Major: Move off of JCenter and onto Maven Central.
• New: Adds Ktlint [Credit: @nighthawk24]
• Fix: Added SaplingParamTool and ability to clear param files from cache [Credit: @herou]
• New: Added responsible disclosure document for vulnerabilities [Credit: @zebambam]
• New: UnifiedViewingKey concept.
• New: Adds support for autoshielding, including database migrations.
• New: Adds basic support for UTXOs, including refresh during scan.
• New: Support the ability to wipe all sqlite data and rebuild from keys.
• New: Switches to ZOMG lightwalletd instances.
• Fix: Only notify subscribers when a new block is detected.
• New: Add scan metrics and callbacks for apps to measure performance.
• Fix: Improve error handling and surface critical Initialization errors.
• New: Adds cleanup and removal of failed transactions.
• New: Improved logic for determining the wallet birthday.
• New: Add the ability to rewind and rescan blocks.
• New: Better safeguards against testnet v mainnet data contamination.
• New: Improved troubleshooting of ungraceful shutdowns.
• Docs: Update README to draw attention to the demo app.
• New: Expose transaction count.
• New: Derive sapling activation height from the active network.
• New: Latest checkpoints for mainnet and testnet.

Version 1.2.1-beta04

• New: Updated to latest versions of grpc, grpc-okhttp and protoc
• Fix: Addresses root issue of Android 11 crash on SSL sockets

Version 1.2.1-beta03

• New: Implements ZIP-313, reducing the default fee from 10,000 to 1,000 zats.
• Fix: 80% reduction in build warnings from 90 -> 18 and improved docs [Credit: @herou].

Version 1.2.1-beta02

• New: Improve birthday configuration and config functions.
• Fix: Broken layout in demo app transaction list.

Version 1.2.1-beta01

• New: Added latest checkpoints for testnet and mainnet.
• New: Added display name for Canopy.
• New: Update to the latest lightwalletd service definition.
• Fix: Convert Initializer.Builder to Initializer.Config to simplify the constructors.

Version 1.2.0-beta01

• New: Added ability to erase initializer data.
• Fix: Updated to latest librustzcash, fixing send functionality on Canopy.

Version 1.1.0-beta10

• New: Modified visibility on a few things to facilitate partner integrations.

Version 1.1.0-beta08

• Fix: Publishing has been corrected by jcenter's support team.
• New: Minor improvement to initializer

Version 1.1.0-beta05

• New: Synchronizer can now be started with just a viewing key.
• New: Initializer improvements.
• New: Added tool for loading checkpoints.
• New: Added tool for deriving keys and addresses, statically.
• New: Updated and revamped the demo apps.
• New: Added a bit more (unofficial) t-addr support.
• Fix: Broken testnet demo app.
• Fix: Publishing configuration.

Version 1.1.0-beta04

• New: Add support for canopy on testnet.
• New: Change the default lightwalletd server.
• New: Add lightwalletd service for fetching t-addr transactions.
• New: prove the concept of local RPC via protobufs.
• New: Iterate on the demo app.
• New: Added new checkpoints.
• Fix: Minor enhancements.

Version 1.1.0-beta03

• New: Add robust support for transaction cancellation.
• New: Update to latest version of librustzcash.
• New: Expand test support.
• New: Improve and simplify intialization.
• New: Flag when rust is running in debug mode, causing a 10X slow down.
• New: Contributing guidelines.
• Fix: Minor cleanup and improvements.