Switch from ZIP 32 account indices to UUID account identifiers

CHANGELOG.md

@@ -7,18 +7,30 @@ and this library adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- `Synchronizer.getAccounts()`
-- `Synchronizer.walletBalances: StateFlow<Map<Account, AccountBalance>?>` that is replacement for the removed 
+- `Synchronizer.importAccountByUfvk()` has been added
+- `Synchronizer.getAccounts()` returning all the created or imported accounts. See the documentation in `Account`.
+- `Synchronizer.walletBalances: StateFlow<Map<AccountUuid, AccountBalance>?>` that is replacement for the removed 
   `orchardBalances`, `saplingBalances`, and `transparentBalance`
+- `getTransactions(accountUuid: AccountUuid)` to get transactions belonging to the given account
+- `Zip32AccountIndex`, `AccountUuid`, `AccountUsk`, `AccountPurpose`, `AccountCreateSetup`, and `AcountImportSetup` 
+  model classes have been added to support the new or the changed APIs
 
-### Changed 
-- `Synchronizer.orchardBalances`, `Synchronizer.saplingBalances`, and `Synchronizer.transparentBalance` have been 
-  replaced by `Synchronizer.walletBalances` that provides these balances based on `Account` 
+### Changed
+- `Account` data class works with `accountUuid: AccountUuid` instead of the previous ZIP 32 account index
+- These functions from `DerivationTool` have been refactored to work with the new `Zip32AccountIndex` instead of the
+  `Account` data class: `deriveUnifiedSpendingKey`, `deriveUnifiedAddress`, `deriveArbitraryAccountKey`
+- `WalletCoordinator` now provides a way to instantiate `Synchronizer` with the new `accountName` and `keySource` 
+  parameters
+- `UnifiedSpendingKey` does not hold `Account` information anymore, it has been replaced by `AccountUsk` model class 
+  in a few internal cases
+- `Synchronizer.send` extension function receives `Account` on input
+- `PendingTransaction` sealed class descendants have been renamed
 
 ### Removed
 - `Synchronizer.sendToAddress` and `Synchronizer.shieldFunds` have been removed, use 
   `Synchronizer.createProposedTransactions` and `Synchronizer.proposeShielding` instead
 - `Synchronizer.orchardBalances`, `Synchronizer.saplingBalances`, and `Synchronizer.transparentBalance`
+  (use `Synchronizer.walletBalances` instead).
 
 ### Fixed
 - The `CompactBlockProcessor` now correctly distinguishes between `Response.Failure.Server.Unavailable` and other 

backend-lib/Cargo.toml

@@ -32,6 +32,7 @@ rayon = "1.7"
 # JNI
 anyhow = "1"
 jni = { version = "0.21", default-features = false }
+uuid = "1"
 
 # Logging
 log-panics = "2.0.0"
@@ -69,3 +70,10 @@ xz2 = { version = "0.1", features = ["static"] }
 name = "zcashwalletsdk"
 path = "src/main/rust/lib.rs"
 crate-type = ["staticlib", "cdylib"]
+
+[patch.crates-io]
+zcash_address = { git = "https://github.com/zcash/librustzcash", rev = "c2ebc05be118a972352801a328e6c61f69bb8a16" }
+zcash_client_backend = { git = "https://github.com/zcash/librustzcash", rev = "c2ebc05be118a972352801a328e6c61f69bb8a16" }
+zcash_client_sqlite = { git = "https://github.com/zcash/librustzcash", rev = "c2ebc05be118a972352801a328e6c61f69bb8a16" }
+zcash_primitives = { git = "https://github.com/zcash/librustzcash", rev = "c2ebc05be118a972352801a328e6c61f69bb8a16" }
+zcash_proofs = { git = "https://github.com/zcash/librustzcash", rev = "c2ebc05be118a972352801a328e6c61f69bb8a16" }

backend-lib/src/main/java/cash/z/ecc/android/sdk/internal/Backend.kt

@@ -1,13 +1,13 @@
 package cash.z.ecc.android.sdk.internal
 
 import cash.z.ecc.android.sdk.internal.model.JniAccount
+import cash.z.ecc.android.sdk.internal.model.JniAccountUsk
 import cash.z.ecc.android.sdk.internal.model.JniBlockMeta
 import cash.z.ecc.android.sdk.internal.model.JniRewindResult
 import cash.z.ecc.android.sdk.internal.model.JniScanRange
 import cash.z.ecc.android.sdk.internal.model.JniScanSummary
 import cash.z.ecc.android.sdk.internal.model.JniSubtreeRoot
 import cash.z.ecc.android.sdk.internal.model.JniTransactionDataRequest
-import cash.z.ecc.android.sdk.internal.model.JniUnifiedSpendingKey
 import cash.z.ecc.android.sdk.internal.model.JniWalletSummary
 import cash.z.ecc.android.sdk.internal.model.ProposalUnsafe
 
@@ -24,7 +24,7 @@ interface Backend {
     suspend fun initBlockMetaDb(): Int
 
     suspend fun proposeTransfer(
-        accountIndex: Int,
+        accountUuid: ByteArray,
         to: String,
         value: Long,
         memo: ByteArray? = null
@@ -35,12 +35,12 @@ interface Backend {
      */
     @Throws(RuntimeException::class)
     suspend fun proposeTransferFromUri(
-        accountIndex: Int,
+        accountUuid: ByteArray,
         uri: String
     ): ProposalUnsafe
 
     suspend fun proposeShielding(
-        accountIndex: Int,
+        accountUuid: ByteArray,
         shieldingThreshold: Long,
         memo: ByteArray? = null,
         transparentReceiver: String? = null
@@ -85,10 +85,28 @@ interface Backend {
      */
     @Throws(RuntimeException::class)
     suspend fun createAccount(
+        accountName: String,
+        keySource: String?,
         seed: ByteArray,
         treeState: ByteArray,
-        recoverUntil: Long?
-    ): JniUnifiedSpendingKey
+        recoverUntil: Long?,
+    ): JniAccountUsk
+
+    /**
+     * @throws RuntimeException as a common indicator of the operation failure
+     */
+    @Throws(RuntimeException::class)
+    @Suppress("LongParameterList")
+    suspend fun importAccountUfvk(
+        accountName: String,
+        keySource: String?,
+        ufvk: String,
+        treeState: ByteArray,
+        recoverUntil: Long?,
+        purpose: Int,
+        seedFingerprint: ByteArray?,
+        zip32AccountIndex: Long?,
+    ): JniAccount
 
     /**
      * @throws RuntimeException as a common indicator of the operation failure
@@ -109,13 +127,13 @@ interface Backend {
     fun isValidTexAddr(addr: String): Boolean
 
     @Throws(RuntimeException::class)
-    suspend fun getCurrentAddress(accountIndex: Int): String
+    suspend fun getCurrentAddress(accountUuid: ByteArray): String
 
     fun getTransparentReceiver(ua: String): String?
 
     fun getSaplingReceiver(ua: String): String?
 
-    suspend fun listTransparentReceivers(accountIndex: Int): List<String>
+    suspend fun listTransparentReceivers(accountUuid: ByteArray): List<String>
 
     fun getBranchIdForHeight(height: Long): Long
 

backend-lib/src/main/java/cash/z/ecc/android/sdk/internal/Derivation.kt

@@ -11,14 +11,14 @@ interface Derivation {
     fun deriveUnifiedAddress(
         seed: ByteArray,
         networkId: Int,
-        accountIndex: Int
+        accountIndex: Long
     ): String
 
     fun deriveUnifiedSpendingKey(
         seed: ByteArray,
         networkId: Int,
-        accountIndex: Int
-    ): JniUnifiedSpendingKey
+        accountIndex: Long
+    ): ByteArray
 
     /**
      * @return a unified full viewing key.
@@ -66,7 +66,7 @@ interface Derivation {
         contextString: ByteArray,
         seed: ByteArray,
         networkId: Int,
-        accountIndex: Int
+        accountIndex: Long
     ): ByteArray
 
     companion object {

backend-lib/src/main/java/cash/z/ecc/android/sdk/internal/jni/JniConstants.kt

@@ -0,0 +1,14 @@
+package cash.z.ecc.android.sdk.internal.jni
+
+import cash.z.ecc.android.sdk.internal.model.JniAccount
+
+/**
+ * The number of bytes in the account UUID parameter. It's used e.g. in [JniAccount.accountUuid], or
+ * [JniUnifiedSpendingKey.accountUuid]
+ */
+const val JNI_ACCOUNT_UUID_BYTES_SIZE = 16
+
+/**
+ * The number of bytes in the seed fingerprint parameter. It's used e.g. in [JniAccount.seedFingerprint]
+ */
+const val JNI_ACCOUNT_SEED_FP_BYTES_SIZE = 32