Retry broadcaster transactions with submit plans

CHANGELOG.md

@@ -6,6 +6,27 @@ and this library adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # Unreleased
 
+## Changed
+- `Broadcaster` transactions now remain eligible for SDK automatic retry after submission. The SDK records the submitted endpoints privately and retries with those endpoints instead of the synchronizer's default endpoint.
+
+## Checkpoints
+
+Mainnet
+
+````
+Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3340000.json
+...
+Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3355000.json
+````
+
+Testnet
+
+````
+Sources/ZcashLightClientKit/Resources/checkpoints/testnet/4010000.json
+...
+Sources/ZcashLightClientKit/Resources/checkpoints/testnet/4030000.json
+````
+
 # 2.6.0-alpha.3 - 2026-05-26
 
 ## Changed

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libzcashlc"
-version = "2.5.1"
+version = "2.6.0-alpha.3"
 authors = [
     "Jack Grigg <thestr4d@gmail.com>",
     "Lukas Korba <lukas@tangiblecodes.com>",
@@ -84,7 +84,7 @@ rust_decimal = { version = "1", default-features = false, features = ["c-repr"]
 xz2 = { version = "0.1", features = ["static"] }
 
 # Voting
-zcash_voting = { version = "=0.10.1", default-features = false, features = [
+zcash_voting = { version = "0.10.1", default-features = false, features = [
     "client-pir",
     "client-tree-sync",
 ] }

Sources/ZcashLightClientKit/Block/Actions/TxResubmissionAction.swift

@@ -15,11 +15,15 @@ final class TxResubmissionAction {
     var latestResolvedTime: TimeInterval = 0
     let transactionRepository: TransactionRepository
     var transactionEncoder: TransactionEncoder
+    let pendingSubmitPlanStore: PendingSubmitPlanStore
+    let submitPlanExecutor: SubmitPlanExecutor
     let logger: Logger
 
     init(container: DIContainer) {
         transactionRepository = container.resolve(TransactionRepository.self)
         transactionEncoder = container.resolve(TransactionEncoder.self)
+        pendingSubmitPlanStore = container.resolve(PendingSubmitPlanStore.self)
+        submitPlanExecutor = container.resolve(SubmitPlanExecutor.self)
         logger = container.resolve(Logger.self)
     }
 }
@@ -33,7 +37,12 @@ extension TxResubmissionAction: Action {
         // find all candidates for the resubmission
         do {
             logger.info("TxResubmissionAction check started at \(latestBlockHeight) height.")
-            let transactions = try await transactionRepository.findForResubmission(upTo: latestBlockHeight)
+            let transactions = try await pendingSubmitPlanStore.loadTransactionsAndRetainSubmitPlans(
+                loadTransactions: {
+                    try await transactionRepository.findForResubmission(upTo: latestBlockHeight)
+                },
+                transactionId: { $0.rawID }
+            )
 
             // no candidates, update the time and continue with the next action
             if transactions.isEmpty {
@@ -47,10 +56,29 @@ extension TxResubmissionAction: Action {
                     // resubmission
                     do {
                         for transaction in transactions {
+                            let submitPlan = await pendingSubmitPlanStore.getSubmitPlan(for: transaction.rawID)
+                            if case .awaitingPlan = submitPlan {
+                                logger.info(
+                                    "TxResubmissionAction skipping transaction \(transaction.rawID.toHexStringTxId()) " +
+                                    "until a submit plan is registered."
+                                )
+                                continue
+                            }
+
                             logger.info("TxResubmissionAction trying to resubmit transaction \(transaction.rawID.toHexStringTxId()).")
                             let encodedTransaction = try transaction.encodedTransaction()
 
-                            try await transactionEncoder.submit(transaction: encodedTransaction)
+                            switch submitPlan {
+                            case .none:
+                                try await transactionEncoder.submit(transaction: encodedTransaction)
+                            case .ready(let plan):
+                                try await submitPlanExecutor.submit(
+                                    transaction: encodedTransaction,
+                                    submitPlan: plan
+                                )
+                            case .awaitingPlan:
+                                break
+                            }
                         }
                     } catch {
                         logger.error("TxResubmissionAction failed to resubmit candidates.")

Sources/ZcashLightClientKit/Broadcaster.swift

@@ -16,6 +16,11 @@ import Foundation
 /// strategies such as submitting to multiple lightwalletd servers
 /// in parallel.
 ///
+/// Transactions created through this API wait for the caller to submit them.
+/// Once submitted, automatic retry uses the submitted endpoints instead of the
+/// synchronizer's default endpoint. Retry tries the recorded endpoints in order
+/// until one submit succeeds.
+///
 /// Typical usage:
 /// ```swift
 /// // 1. Create the transaction(s)
@@ -69,6 +74,9 @@ public protocol Broadcaster: AnyObject {
     /// transaction, and tears down the connection. Respects the current
     /// Tor configuration.
     ///
+    /// If the transaction was created through this `Broadcaster`, the endpoint
+    /// is remembered for automatic retry.
+    ///
     /// - Parameter rawTransaction: the raw serialized transaction bytes.
     /// - Parameter endpoint: the `LightWalletEndpoint` to submit to.
     func submit(

Sources/ZcashLightClientKit/DAO/TransactionDao.swift

@@ -33,7 +33,7 @@ extension Connection {
     }
 }
 
-class TransactionSQLDAO: TransactionRepository {
+class TransactionSQLDAO: TransactionRepository, RawTransactionLookup {
     enum NotesTableStructure {
         static let transactionID = SQLite.Expression<Int>("tx")
         static let memo = SQLite.Expression<Blob>("memo")
@@ -146,6 +146,14 @@ class TransactionSQLDAO: TransactionRepository {
         return try await execute(query) { try ZcashTransaction.Overview(row: $0) }
     }
 
+    func find(rawTransaction: Data) async throws -> ZcashTransaction.Overview {
+        let query = transactionsView
+            .filter(ZcashTransaction.Overview.Column.raw == Blob(bytes: rawTransaction.bytes))
+            .limit(1)
+
+        return try await execute(query) { try ZcashTransaction.Overview(row: $0) }
+    }
+
     func find(offset: Int, limit: Int, kind: TransactionKind) async throws -> [ZcashTransaction.Overview] {
         let query = transactionsView
             .order((ZcashTransaction.Overview.Column.minedHeight ?? BlockHeight.max).desc)

Sources/ZcashLightClientKit/Repository/TransactionRepository.swift

@@ -29,3 +29,7 @@ protocol TransactionRepository {
     func getTransactionOutputs(for rawID: Data) async throws -> [ZcashTransaction.Output]
     func debugDatabase(sql: String) -> String
 }
+
+protocol RawTransactionLookup {
+    func find(rawTransaction: Data) async throws -> ZcashTransaction.Overview
+}

Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3340000.json

@@ -0,0 +1,8 @@
+{
+  "network": "main",
+  "height": "3340000",
+  "hash": "0000000000176c646f484fd89f0849d5d12b2e72fc3b6bb19f28513c131542aa",
+  "time": 1778604451,
+  "saplingTree": "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",
+  "orchardTree": "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"
+}

Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3342500.json

@@ -0,0 +1,8 @@
+{
+  "network": "main",
+  "height": "3342500",
+  "hash": "0000000000eb9738c9af194d316f17ab50281aa89e5afcdb40f226a507a0d04f",
+  "time": 1778792821,
+  "saplingTree": "01e76a2bf8512779f9cf1885eec1fa2b7cb7f34ae687dd2a73013e0334f2aed15e011dcd24172dc97f8dadc0923c4c839a863a94e46f3815ae3694fd727c851c8f5c1f000001ee90f27235279cc5ca519aca4a7f78c43de15561c769714773b0b5aee455534e0001f17d34eaf3ca8b583b8bbc946c85cc8af0a5b6175197bbdb986cc001cc606220011e4d0591346a7b100a283de68a5e0525f05c4aa931829a7e02192ed4d5cf2925017e5b5e5d645d836e58bce4247e154448c1a0b78bbf732cb6c3943cd7221bfe59016ef74376850fcc46d8892d318c61840ef4c58e84d1b86b3ee3188d23507f555c011709749511f2953f4593c45ef9cd3b291cf32a59b5c288e8618048b84d7fc157013f3c85d10f47339825160e6ff786ca15c7fd0c59b7882262f44a57c266b618140120cc0c0ff8e16bd54c723a4340007c266b33f0a99ef18aa0a4a2cf3889f0375b01b79e8339dd14c75d334b7d22837c83b54af56dc8ffc00c1d9e000d73218c1f4501e1ed2cd5a21ca655ae19e2f2c367d0039f37ee35ba856791768e01e8b5012d5b00011d85b015e936981d3a869c16ed2e03aeeb2444206933acc3f7b384aeb963256601929f0d44045c58428bd8daca3e2c9ca5a0361b5573a4158251dbe9f63a84e94901931c48ea50688eae5e54c24d0df7a6b00ce498f92eb5e1cfd6a2d87d8ebd5364017d1ce2f0839bdbf1bad7ae37f845e7fe2116e0c1197536bfbad549f3876c3c590000013e2598f743726006b8de42476ed56a55a75629a7b82e430c4e7c101a69e9b02a011619f99023a69bb647eab2d2aa1a73c3673c74bb033c3c4930eacda19e6fd93b0000000160272b134ca494b602137d89e528c751c06d3ef4a87a45f33af343c15060cc1e0000000000",
+  "orchardTree": "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"
+}

Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3345000.json

@@ -0,0 +1,8 @@
+{
+  "network": "main",
+  "height": "3345000",
+  "hash": "0000000000b7b5080387458121c500fc8acdf206d0593dd4b1edf521360e129d",
+  "time": 1778981173,
+  "saplingTree": "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",
+  "orchardTree": "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"
+}

Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3347500.json

@@ -0,0 +1,8 @@
+{
+  "network": "main",
+  "height": "3347500",
+  "hash": "0000000000879a8d5268093eab17f8008ffd0fe9fb59087275109cd46e8011aa",
+  "time": 1779169130,
+  "saplingTree": "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",
+  "orchardTree": "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"
+}

Sources/ZcashLightClientKit/Resources/checkpoints/mainnet/3350000.json

@@ -0,0 +1,8 @@
+{
+  "network": "main",
+  "height": "3350000",
+  "hash": "00000000007cf26cfa1ad66d6b09d49adb6b4cf18bf6409bfc621600c01504e1",
+  "time": 1779359129,
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