fix(wallet): gate sends on what the funding pool can actually spend - #1107
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The amount screen compared against `balance.spendable`, which is the whole wallet's confirmed balance — every funding account, CoinJoin included. A send draws on `SEND_FUNDING_SOURCES`: BIP44@0, BIP32@0 and the DashPay receiving accounts, with CoinJoin deliberately out. So the screen accepted amounts the builder then refused, and the user learned it only after committing. Support ticket 32081: 94 DASH on screen, 0.0054 actually spendable, the rest mixed. Entering 1 DASH gave "insufficient unreserved core funds … available Some(538503), required Some(100000000)" — 538503 duffs being exactly the transparent balance. Both the gate and Max now read `pooledSpendableDuffs`, which the SDK computes with the same account resolution the builder uses (dashpay/platform#4582) rather than the app mirroring the pooling rule. The mirror is what drifted: the comment in SwiftDashSDKTransactionSender still claims `.allSpendable` pools "the same set the home balance already totals", and it never did. Max is included deliberately. Leaving it on the wallet-wide figure would keep a button that fills in an amount guaranteed to fail.
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📝 WalkthroughWalkthroughThe wallet now tracks pooled spendable funds, falls back to wallet-wide spendable balance when needed, and updates payment validation when the effective sendable ceiling changes. Max messaging identifies mixed-coin balances, and payment submission rechecks affordability. ChangesPooled spendable balance
Estimated code review effort: 4 (Complex) | ~45 minutes Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant CoreWallet
participant SwiftDashSDKWalletState
participant SendAmountModel
participant ProvideAmountViewController
CoreWallet->>SwiftDashSDKWalletState: Return pooledSpendableBalance()
SwiftDashSDKWalletState-->>SendAmountModel: Publish effective sendable ceiling
SendAmountModel->>SendAmountModel: Revalidate amount
SendAmountModel-->>ProvideAmountViewController: Invoke validationDidChangeHandler
ProvideAmountViewController->>SendAmountModel: Recheck affordability before payment
Suggested reviewers: Merge Risk: 🟡 Moderate · up to The change caps plain sends at funds the transaction builder can use, but an older pooled-balance read can still overwrite a replacement read and leave affordability validation stale. The read lifecycle guard and regression coverage should be completed before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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…ure is unavailable `refreshPooledSpendableBalance` swallowed every error from `pooledSpendableBalance()` behind a `try?` guard, so a failing read left `pooledSpendableDuffs` at its initial 0 with nothing in the log. On the 2026-09-03 QA build the SDK refused every call (it resolved the core-wallet handle in the wrong table, platform#4582), and that silent 0 became Max = 0 and a send gate that rejected every amount — for every wallet, mixed or not. Both QA and a support report landed on it within hours; the App Store build, which never asks for the pooled figure, worked on the same wallet. Make "unknown" a state of its own: `pooledSpendableDuffs` is `nil` until the SDK has answered and again whenever a read fails, and the gate and Max read `sendableDuffs`, which falls back to `balance.spendable` while it is nil. Over-offering there is the pre-#1107 behaviour — a build-time refusal the user can act on — whereas a silent 0 is a dead screen. A failed read is logged once per outage with the SDK's error and re-armed after the next success, so the next such regression shows up in the log instead of in a ticket. The figure is cleared with the rest of the balance state on `clearBalance` / `clearAllState`.
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Final validation — Phase 2 only (queue backlog)
Verified the supplied findings against head 5b6bdf6 and the relevant callers. The pooled balance improves the send ceiling, but active UIKit validation does not refresh when that ceiling changes, and Max explanations incorrectly attribute excluded CoinJoin funds to fees or pending confirmations. App-side regression coverage is also missing; this verification was source-based, without an exact-head build or runtime smoke test.
Source: reviewer 1: gpt-6-astra (agent: phase2-reviewer, role: general); reviewer 2: gpt-6-astra (agent: phase2-reviewer, role: ffi-engineer); final verifier: gpt-6-astra (agent: astra-verifier, role: final-verifier)
Review provenance
- Triage:
criticalbygpt-6-astra(effort low) — This changes cryptocurrency send eligibility and Max amounts through SDK-backed funding-pool balances, where refresh, fallback, or account-selection errors could misrepresent spendable funds or block valid payments, and live CoinJoin-heavy wallet validation is still missing. - Phase 1 reviewers: not run (skipped for throughput: 31 PRs queued, above the 10 limit)
- Fresh verifier:
gpt-6-astra— final-verifier; agentastra-verifier - Phase 2 reviewers:
gpt-6-astra— general (completed, effort xhigh); agentphase2-reviewer,gpt-6-astra— ffi-engineer (completed, effort xhigh); agentphase2-reviewer
🔴 2 blocking | 🟡 1 suggestion(s)
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These findings are from an automated code review. Verify each finding against the current code and only fix it if needed.
In `DashWallet/Sources/UI/Payments/Amount/Model/Send/SendAmountModel.swift`:
- [BLOCKING] DashWallet/Sources/UI/Payments/Amount/Model/Send/SendAmountModel.swift:63-70: Refresh active send validation when the pooled ceiling changes
The new effective ceiling can change without another amount edit—for example, when a pooled read recovers and replaces the wallet-wide fallback with the much smaller transparent balance. SendAmountModel does not observe pooledSpendableDuffs, and BaseAmountModel's balance subscription only refreshes walletBalance; it does not revalidate the amount. BaseAmountViewController updates its Send button only on amount changes or view appearance. Consequently, an amount entered while the fallback applies remains enabled after the lower ceiling arrives. ProvideAmountViewController's submit handler checks the minimum output and CrowdNode leftover balance, but not current affordability, so it still forwards the amount to payment preparation and the late builder failure this PR aims to prevent. Observe effective-ceiling changes to refresh both the validation message and button state, and recheck affordability before forwarding the amount.
In `DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift`:
- [BLOCKING] DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift:121-127: Update Max explanations to distinguish excluded CoinJoin funds
Switching this shared Max calculation to the funding pool introduces a reduction that its callers explain incorrectly. With a fully confirmed CoinJoin-only balance, pooled Max is zero, but SendAmountModel.selectAllFundsWithoutAuth passes the positive wallet-wide spendable balance to coreZeroMaxMessage, producing "Your … balance is too low to cover the transfer fee." With some transparent funds, InternalTransferViewModel.fillMaxFromWallet passes the entire difference between wallet total and pooled Max to coreHeldBackMessage, which says it is held back for network fees and unconfirmed coins. For the wallet described in this PR, that would misattribute almost 94 DASH. Those excluded funds require the mixed-coins sweep, not additional confirmations or fee funding. Update the explanation inputs and callers to distinguish excluded funding accounts from unconfirmed funds and the actual fee reserve.
- [SUGGESTION] DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift:183-188: Add app-side regression coverage for the pooled balance contract
The diff adds no tests for the Swift-side fallback and consumer-update policy, and the existing test directory contains no coverage referencing pooledSpendableDuffs, sendableDuffs, or feeAwareMaxSendable. SDK arithmetic tests cannot verify these app behaviors. Add focused regression cases for a pool below the wallet total, a successful zero that must not fall back, an unavailable result that does fall back, recovery from an unavailable read, Max flooring at the fee reserve, and clearing pooled state when changing wallets. Include an active amount-screen case that checks the error and button state after the ceiling changes. Compile-ready tests remain useful despite the documented test-target breakage, alongside a focused CoinJoin-heavy wallet smoke test.
…cludes Two problems with gating on the pooled figure, both from review. The ceiling can move while the amount screen is open and the amount is untouched — a pooled read landing for the first time, or recovering from an outage and replacing the wallet-wide fallback with a much smaller transparent balance. `BaseAmountModel`'s balance subscription only refreshes `walletBalance`, and the view refreshes its button off `$amount`, so an amount typed while the fallback applied stayed enabled after the lower ceiling arrived. `SendAmountModel` now observes `pooledSpendableDuffs` and drives a new `validationDidChangeHandler`, which the view treats exactly as an amount change — error text and button together. `ProvideAmountViewController` re-checks affordability at submit as well: a tap can still race the refresh, and forwarding the amount is what produces the late builder failure this change exists to prevent. The Max explanations then attributed the reduction to the wrong thing. A confirmed CoinJoin-only balance produced a pooled Max of zero and was told its balance was too low to cover the transfer fee — false, and it points the user at waiting rather than at the mixed-coins move. With some transparent funds, the whole difference was described as held back for fees and unconfirmed coins, which on the ticket-32081 wallet would misattribute about 94 DASH. `excludedFromSendPoolDuffs` names that part, `coreZeroMaxMessage` takes it and says so, and `coreHeldBackMessage` splits the shortfall into the excluded coins and the genuine fee-and-unconfirmed remainder, printing only the sentences that have a nonzero amount. Two single-argument sentences rather than one two-argument format: a translation that reorders positional specifiers crashes, and this string is on the path of every Max tap. Each decision is now split into a pure form taking its inputs as parameters and a thin wrapper reading the SDK singletons, which is what the new tests cover: a pool below the wallet total, a successful zero that must not fall back, an unavailable read that does, recovery lowering the ceiling again, Max flooring at the reserve, and the wording each shortfall produces.
…the-pooled-balance # Conflicts: # DashWallet.xcodeproj/project.pbxproj # DashWallet/Sources/UI/Payments/InternalTransfer/InternalTransferViewModel.swift
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Final validation — Phase 2 only (queue backlog)
Verified the Phase-2 findings against head 0aa91de. The Max explanation is fixed and pooled-balance updates now refresh ordinary send validation, but an outstanding leftover-balance alert can still forward an amount after the ceiling falls. The new tests cover arithmetic and message policy, not wallet-reset or live validation transitions; this verification was source-level and did not independently establish build or runtime success.
Source: reviewer 1: gpt-6-astra (agent: phase2-reviewer, role: general); reviewer 2: gpt-6-astra (agent: phase2-reviewer, role: ffi-engineer); final verifier: gpt-6-astra (agent: astra-verifier, role: final-verifier)
Review provenance
- Triage:
criticalbygpt-6-astra(effort low) — The change controls cryptocurrency send eligibility and Max amounts across multiple payment flows using asynchronously refreshed SDK funding-pool balances, so errors in account selection, fallback handling, or revalidation could materially disrupt access to funds or permit transactions the builder cannot fund. - Phase 1 reviewers: not run (skipped for throughput: 30 PRs queued, above the 10 limit)
- Fresh verifier:
gpt-6-astra— final-verifier; agentastra-verifier - Phase 2 reviewers:
gpt-6-astra— general (completed, effort xhigh); agentphase2-reviewer,gpt-6-astra— ffi-engineer (completed, effort xhigh); agentphase2-reviewer
🔴 1 blocking | 🟡 1 suggestion(s)
1 additional finding(s) omitted (not in diff).
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These findings are from an automated code review. Verify each finding against the current code and only fix it if needed.
In `DashWallet/Sources/UI/Payment Controller/Enter Amount/ProvideAmountViewController.swift`:
- [BLOCKING] DashWallet/Sources/UI/Payment Controller/Enter Amount/ProvideAmountViewController.swift:69-77: Refresh active send validation when the pooled ceiling changes
The new subscription and submit guard fix ordinary validation refreshes, but the affordability guard runs before an asynchronous decision. SendAmountViewController.checkLeftoverBalance presents a Continue/Cancel alert when the persisted CrowdNode balance is positive and the entered amount would leave less than 30,000 duffs of the wallet-wide spendable balance. An amount accepted under the wallet-wide fallback can open that alert, then exceed the available funding pool when the pooled read recovers. The observer disables the underlying Send button, but the alert's Continue action still reaches this callback and forwards the amount without another affordability check. CrowdNode being hidden does not eliminate this path: the warning reads persisted CrowdNodeDefaults directly. Recheck current affordability after canContinue and immediately before forwarding, refreshing validation and returning on failure.
In `DashWalletTests/PooledSendableBalanceTests.swift`:
- [SUGGESTION] DashWalletTests/PooledSendableBalanceTests.swift:59-66: Add app-side regression coverage for the pooled balance contract
The 13 new tests cover the fallback arithmetic, successful zero, exclusion calculation, fee flooring, and Max-message policy. However, this recovery test compares two pure-function results; it cannot detect a missing subscription, validation callback, button refresh, or submit-time recheck. No tests exercise clearing and reseeding an existing pooled value on a wallet transition or an unchanged amount becoming invalid when a lower pooled result arrives. Add focused state-transition coverage, including recovery while the leftover-balance alert awaits Continue. A narrow injected balance reader or publisher can preserve private(set) while exercising production wiring; writable public state is not required. The outstanding alert callback gap demonstrates why the arithmetic tests alone do not cover this contract.
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One blocking race remains before approval: re-check sendAmountModel.canShowInsufficientFunds inside the checkLeftoverBalance completion, immediately before forwarding the amount. The current guard runs before the CrowdNode Continue/Cancel alert; if the pooled ceiling drops while that alert is open, Continue still forwards the now-unaffordable amount and reaches the late builder failure this PR is meant to prevent. The existing inline thread has the same trace. The rest of the final diff looks good.
…ot before The re-check ran before `checkLeftoverBalance`, which — when the wallet has a CrowdNode balance — presents its own Continue/Cancel alert and calls back from the button handler. The ceiling can drop while that alert is open, and Continue then forwards an amount the funding pool can no longer fund, reaching exactly the late builder failure this screen exists to prevent. The check moved into `amountIsStillAffordable()` and now runs twice: once before the alert, so the user is not asked to confirm emptying their wallet for an amount that cannot be funded anyway, and again as the last statement before the amount leaves the screen. The completion fires from a `UIAlertAction` handler, so the button and error refresh inside it are already on the main thread. Only this caller is in scope: `BuyCreditsViewController` and `CrowdNodeTransferViewController` share the same `checkLeftoverBalance` shape but do not route through the pooled ceiling this PR introduces.
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Inline comments:
In `@DashWallet/Sources/UI/Payments/Amount/Model/Send/SendAmountModel.swift`:
- Around line 90-92: Update the observation in SendAmountModel to derive a
deduplicated effective sendableDuffs ceiling from both $balance and
$pooledSpendableDuffs, rather than observing pooledSpendableDuffs alone.
Preserve the existing main-run-loop delivery and ensure balance changes trigger
validation and button refresh when the pooled value remains nil.
In `@DashWalletTests/PooledSendableBalanceTests.swift`:
- Line 143: Update the assertion in the relevant pooled sendable balance test to
verify that the message contains the expected fee-shortfall text, such as the
existing “fee” wording produced by feeReserveExceedsBalanceMessage(.core),
rather than only asserting it excludes “mixed coins”.
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DashWallet.xcodeproj/project.pbxprojDashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swiftDashWallet/Sources/UI/Payment Controller/Enter Amount/ProvideAmountViewController.swiftDashWallet/Sources/UI/Payments/Amount/BaseAmountViewController.swiftDashWallet/Sources/UI/Payments/Amount/Model/BaseAmountModel.swiftDashWallet/Sources/UI/Payments/Amount/Model/Send/SendAmountModel.swiftDashWallet/Sources/UI/Payments/InternalTransfer/InternalTransferViewModel.swiftDashWalletTests/PooledSendableBalanceTests.swift
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…the-pooled-balance # Conflicts: # DashWallet.xcodeproj/project.pbxproj
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Fixed in ca989cb (develop merged up in 080f11c).
You're right, and the guard was in the wrong place for exactly the reason you give: checkLeftoverBalance presents its own Continue/Cancel alert when the wallet has a CrowdNode balance, and calls back from the UIAlertAction handler. Everything I checked before that call is stale by the time Continue is tapped, and the modal is precisely the window in which a pooled read can land.
The check moved into amountIsStillAffordable() and now runs twice:
- before
checkLeftoverBalance— a cheap rejection, so the user is not asked to confirm emptying their wallet for an amount that cannot be funded anyway; - inside the completion, as the last statement before the amount reaches the delegate. That is where affordability is actually settled. The completion fires from the alert's button handler, so the button and error refresh inside it are already on the main thread.
Scope note: BuyCreditsViewController and CrowdNodeTransferViewController call checkLeftoverBalance in the same shape, but neither routes through the pooled ceiling this PR introduces, so I left them alone rather than widening the change.
BUILD SUCCEEDED after the fix and again after merging develop. Worth flagging one thing the merge surfaced: rebuilding the SDK xcframework was required for that second build — the v4.2-dev merge on dashpay/platform#4582 moved the Swift wrappers ahead of the prebuilt .a, which fails as missing PLATFORM_WALLET_FFI_RESULT_CODE_ERROR_PERSISTER_* symbols and reads like a platform compile error rather than a stale artifact.
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Final validation — Phase 2 only (queue backlog)
The PR fixes the primary pooled-balance gating and Max-calculation paths, and the affordability recheck after the leftover alert is now present. One blocking validation gap remains: while the pooled balance is unavailable, changes to the wallet-wide fallback balance do not trigger send-form revalidation. The new mixed-coins message also lacks localization entries, and the synchronous pooled FFI read runs on the main actor.
Source: reviewer 1: gpt-6-astra (agent: phase2-reviewer, role: general); reviewer 2: gpt-6-astra (agent: phase2-reviewer, role: ffi-engineer); final verifier: gpt-6-astra (agent: astra-verifier, role: final-verifier)
Review provenance
- Triage:
criticalbygpt-6-astra(effort low) — This changes wallet send affordability and maximum-send behavior across CoinJoin-excluded funding sources, directly affecting whether users can initiate and spend funds, with SDK balance-event integration and revalidation paths whose regressions could cause failed or incorrectly permitted transactions. - Phase 1 reviewers: not run (skipped for throughput: 23 PRs queued, above the 10 limit)
- Fresh verifier:
gpt-6-astra— final-verifier; agentastra-verifier - Phase 2 reviewers:
gpt-6-astra— general (completed, effort xhigh); agentphase2-reviewer,gpt-6-astra— ffi-engineer (completed, effort xhigh); agentphase2-reviewer
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🤖 Prompt for all review comments with AI agents
These findings are from an automated code review. Verify each finding against the current code and only fix it if needed.
In `DashWallet/Sources/UI/Payments/InternalTransfer/InternalTransferViewModel.swift`:
- [SUGGESTION] DashWallet/Sources/UI/Payments/InternalTransfer/InternalTransferViewModel.swift:2309-2313: Add the new mixed-coins message to the localization catalogs
The newly introduced user-visible string is passed to `NSLocalizedString`, but the exact key is absent from the repository's localization catalogs. `NSLocalizedString` does not provide translations by itself, so users in non-English locales will receive the English fallback. Add the key to the source catalog and synchronize the locale files using the project's localization workflow.
In `DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift`:
- [SUGGESTION] DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift:417-429: Move the lock-taking pooled-balance FFI read off the main actor
`refreshPooledSpendableBalance()` performs the new synchronous `wallet.coreWallet().pooledSpendableBalance()` call on `@MainActor`. The companion SDK implementation synchronously bridges into Rust, waits for the wallet-manager read lock, and enumerates funding-account UTXOs. During block processing or transaction finalization, this can wait for a writer and then perform a potentially large traversal on the main thread, causing UI stalls during synchronization or wallet activity. Capture the active wallet on the main actor, perform the pooled read on a background executor, and publish the result back on the main actor; coalesce overlapping refreshes and discard results invalidated by wallet or network changes.
In `DashWallet/Sources/UI/Payments/Amount/Model/Send/SendAmountModel.swift`:
- [BLOCKING] DashWallet/Sources/UI/Payments/Amount/Model/Send/SendAmountModel.swift:89-99: Refresh active send validation when the pooled ceiling changes
(existing thread: https://github.com/dashpay/dashwallet-ios/pull/1107#discussion_r3965368140)
The model observes only `pooledSpendableDuffs`. When the pooled read is unavailable, that property remains `nil`, while `sendableDuffs` falls back to `balance.spendable`. A subsequent wallet balance change can therefore lower or raise the effective send ceiling without changing the observed pooled value; `removeDuplicates()` suppresses the repeated `nil`, so `checkAmountForErrors()` and `validationDidChangeHandler` are not called. An amount entered during the outage can remain marked valid and leave the Send button enabled after the fallback balance drops. Derive and observe a deduplicated effective ceiling from both the pooled value and wallet balance, or otherwise trigger the same validation callback whenever either input changes.
…the-pooled-balance # Conflicts: # DashWallet.xcodeproj/project.pbxproj
**The amount screen went blind to half its own ceiling.** It subscribed to `$pooledSpendableDuffs` alone, but through a pooled-read outage that value stays `nil` — `removeDuplicates` swallows every repeat — while `balance` keeps moving the fallback ceiling underneath. An amount typed before a drop stayed valid and the Send button stayed enabled. Both inputs now feed one `sendableCeilingPublisher`, deduplicated on the resolved ceiling, so it reacts to whichever half moved and stays quiet when neither changed the answer. **The pooled read was a main-thread stall.** `pooledSpendableBalance()` bridges synchronously into Rust, waits on the wallet-manager read lock and walks every funding account's UTXO set, and it ran on the main actor during exactly the balance-event bursts that trigger it — behind whatever writer holds the lock (block processing, a finalizing build). The wallet handle is captured on the main actor, the read runs off it, and the result is published back only if it still describes the same wallet and network. Overlapping requests coalesce the way the Platform-credit tally does: one read in flight, one re-run queued. **Tests.** The ceiling publisher is exercised directly — a pure-function test over `sendableDuffs` cannot tell a live subscription from a missing one. Three cases: the pooled figure replacing the fallback, the fallback moving alone during an outage, and an update that leaves the ceiling where it was. The fee-shortfall assertion now names the reason instead of only ruling out the wrong one.
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Inline comments:
In
`@DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift`:
- Around line 456-458: Update pooled spendable read lifecycle handling around
pooledSpendableReadTask, clearAllState(), and clearBalance() by adding a
generation token for each read. Invalidate the generation in both clear paths
and when cancelling due to no wallet; completion handlers must clear the task
slot and publish results only if their captured generation is still current,
preventing stale results and replacement reads from interfering.
- Line 214: Update the sendable amount calculation in applyBalance(_:) to
resolve the two non-nil spendable snapshots with min, clamping the result to the
latest wallet-wide value before sendableDuffs(pooled:walletSpendable:) is
called. Preserve nil handling and the existing finalizeAtomic(..., accountType:
.allSpendable) behavior.
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Final validation — Phase 2 only (queue backlog)
The PR correctly derives the send ceiling from the SDK pooled balance and now refreshes active amount validation from both pooled and fallback balances. One lifecycle bug remains: in-flight pooled-balance reads are not invalidated when wallet state is cleared, allowing stale results to repopulate the new state and allowing cancelled reads to interfere with replacement reads. The mixed-coins localization key also remains absent from the English catalog.
Source: reviewer 1: gpt-6-astra (agent: phase2-reviewer, role: general); reviewer 2: gpt-6-astra (agent: phase2-reviewer, role: ffi-engineer); final verifier: gpt-6-astra (agent: astra-verifier, role: final-verifier)
Review provenance
- Triage:
criticalbygpt-6-astra(effort low) — This changes wallet sendability and maximum-send validation across SDK state, UI revalidation, and internal transfers, directly governing movement of user funds and relying on cross-layer pooled-balance synchronization. - Phase 1 reviewers: not run (skipped for throughput: 20 PRs queued, above the 10 limit)
- Fresh verifier:
gpt-6-astra— final-verifier; agentastra-verifier - Phase 2 reviewers:
gpt-6-astra— general (completed, effort xhigh); agentphase2-reviewer,gpt-6-astra— ffi-engineer (completed, effort xhigh); agentphase2-reviewer
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1 carried-forward finding(s) already raised on this PR; not re-posting as new inline comments.
🤖 Prompt for all review comments with AI agents
These findings are from an automated code review. Verify each finding against the current code and only fix it if needed.
In `DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift`:
- [BLOCKING] DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift:454-500: Invalidate pooled reads before clearing or replacing wallet state
`clearBalance()` and `clearAllState()` set `pooledSpendableDuffs` to nil but do not invalidate the detached read started by `refreshPooledSpendableBalance()`. During a wipe or network transition, the host can still report the same wallet ID and network while the published state has already been cleared, so the completion can pass `stillCurrent` and republish the outgoing wallet's pooled ceiling into the new state. The no-wallet path has a related ownership race: it cancels and clears the task slot, but the detached operation may still resume later and unconditionally set `pooledSpendableReadTask = nil`, potentially clearing a replacement task's slot and permitting overlapping or out-of-order reads. Add a generation or read-ownership token, invalidate it from both clear paths and the no-wallet cancellation path, and only clear the task slot or publish a result when the completing read still owns that token.
In `DashWallet/Sources/UI/Payments/InternalTransfer/InternalTransferViewModel.swift`:
- [SUGGESTION] DashWallet/Sources/UI/Payments/InternalTransfer/InternalTransferViewModel.swift:2309-2313: Add the new mixed-coins message to the localization catalogs
(existing thread: https://github.com/dashpay/dashwallet-ios/pull/1107#discussion_r3973581855)
The newly introduced `NSLocalizedString` key is present in the view model but is absent from `DashWallet/en.lproj/Localizable.strings` and the other main-app localization catalogs at this head. `NSLocalizedString` does not create a catalog entry, so non-English users receive the English fallback and the source catalog is incomplete for the localization pipeline. Add the exact key to the English source catalog and synchronize the locale catalogs through the repository's normal localization workflow.
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Reviewed current head 2066770. I cannot approve it yet because two correctness issues remain in the pooled-balance state.
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In-flight pooled reads are not invalidated by clearBalance or clearAllState. During prepareForNetworkSwitch the host can still expose the same wallet and network, so the old completion passes stillCurrent and republishes outgoing state after the clear. The no-wallet cancellation path also clears the shared task slot before the detached child finishes; that old completion can later erase a replacement task slot and allow overlapping, out-of-order reads. Please use a generation or ownership token, invalidate it in both clear paths and the no-wallet path, and let only the current generation clear the slot, publish, or schedule a rerun.
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sendableDuffs always prefers a non-nil pooled snapshot. applyBalance publishes the newer wallet-wide balance before the asynchronous pooled refresh finishes, so an older pooled value can temporarily exceed the latest total and the amount screen can admit a send the builder rejects. When both snapshots exist, clamp the ceiling to their minimum and cover the stale-pooled/new-wallet-balance case.
Non-blocking: the new mixed-coins NSLocalizedString key is not present in any localization catalog on this head; an exact repository search finds only the Swift source occurrence.
Validation: the dashpay Debug app build succeeds at 2066770 when paired with platform PR #4582 head 8a3ecc7. The focused unit-test action remains blocked by the repository test scheme configuration: Release products are built without enable-testing and the shared target has incompatible dashpay, dashwallet, and SwiftDashSDK test imports.
Both findings are on the off-main pooled read added earlier in this branch. **The wallet/network check was not enough to make a completion safe.** Through `prepareForNetworkSwitch` and the wipe paths the host still reports the same wallet and the same network while the published state has already been cleared, so a read issued before the clear passed `stillCurrent` and republished the outgoing wallet's ceiling into the new state. `clearBalance()` and `clearAllState()` nulled the value without invalidating the read that would overwrite it. They now cancel it, through the same `cancelPooledSpendableRead` the no-wallet branch uses — the shape `cancelPlatformCreditsTally` already established. **The ceiling trusted the pooled figure even when it was the older one.** They are independent snapshots: `applyBalance` publishes the wallet-wide value immediately while the pooled read is still in flight, so a pooled figure from before a spend can outlive a wallet-wide one that already reflects it. Gating on the higher stale number let the screen accept an amount the builder, selecting from current funds, then refuses. `sendableDuffs` takes the lower of the two when both are known.
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In
`@DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swift`:
- Line 527: The pooled spendable read lifecycle must retain ownership of the
replacement task when an earlier read resumes. Update the active-read handling
around pooledSpendableReadTask and pooledSpendableRerunRequested to track a
per-read generation or task identity, and allow only the current owner to clear
the slot, publish results, consume the rerun flag, or start a rerun. Add
regression coverage in PooledSendableBalanceTests for canceling a suspended
read, creating a replacement, and completing the canceled read last.
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DashWallet/Sources/Infrastructure/SwiftDashSDK/SwiftDashSDKWalletState.swiftDashWalletTests/PooledSendableBalanceTests.swift
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Cancelling a read and starting its replacement leaves the cancelled task still scheduled, and when it resumes it looks exactly like the one that owns the slot: it clears `pooledSpendableReadTask` on its way out, which frees the slot while the replacement is still in flight. A third read can then start alongside the second, and the two publish in whatever order they finish — so the send ceiling can settle on the older answer. The cancelled task could also consume the replacement's rerun flag, or start a rerun that was never requested of it. The publish itself was already guarded by the wallet/network check and `Task.isCancelled`; the slot bookkeeping was not, and a `Task` reference cannot express ownership on its own. `PooledReadSlot` gives the question an answer: a generation that moves on every claim and every cancel, so a read can compare the one it was issued under against the current one and step aside when it is no longer the owner. The guard sits before the slot is cleared, so a superseded read publishes nothing, clears nothing, consumes no rerun and starts none. `cancelPooledSpendableRead` moves the generation too, which is what breaks the reported sequence. Kept as a value type so the rule is testable without a wallet, an SDK handle or a live task — including the reviewed order itself: cancel a read, start its replacement, then let the cancelled one finish last.
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Re-reviewed current head 9ab7a7e. The previously blocking stale-read paths are fixed: clear/wipe invalidates in-flight reads, generation ownership prevents a cancelled task from publishing or releasing a replacement's slot, and the resolved send ceiling is clamped to the current wallet-wide snapshot. The added regression tests cover both races. I also verified a Debug simulator build of dashpay succeeds against merged platform #4582 (8b6131f). Approving.
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Issue being fixed or feature implemented
SendAmountModel.canShowInsufficientFundscompared againstbalance.spendable— the whole wallet'sconfirmed balance, every funding account, CoinJoin included. A send draws on
SEND_FUNDING_SOURCES:BIP44@0, BIP32@0 and the DashPay receiving accounts, with CoinJoin deliberately excluded (spending
mixed outputs alongside transparent ones undoes the mixing).
So the screen accepted amounts the builder then refused, and the user found out only after committing:
Support ticket 32081: 94 DASH on screen, 0.0054 actually spendable, the rest mixed.
538503duffsis exactly the transparent balance, unchanged across three days of the user trying.
What was done?
The gate and Max now read
pooledSpendableDuffs, refreshed from the SDK on every balance event. TheSDK computes it with the same account resolution the builder uses (dashpay/platform#4582), so the app
does not mirror the pooling rule.
The mirror is what drifted here: the comment in
SwiftDashSDKTransactionSenderstill claims.allSpendablepools "the same set the home balance already totals" — it never did, and that beliefis why this shipped.
Max is included deliberately. Leaving it on the wallet-wide figure keeps a button that fills in an
amount guaranteed to fail.
Reservations are still not subtracted; the SDK cannot read them yet, and that part is transient.
How Has This Been Tested?
Builds and runs against the SDK carrying the new call. Not yet verified against a live CoinJoin-heavy
wallet — the testnet wallet built for this work has since been swept, so the state must be rebuilt to
watch the ceiling change. The arithmetic is covered on the SDK side.
Breaking Changes
None in API terms, but user-visible: anyone holding CoinJoin funds will see a lower ceiling and a
smaller Max than today. That is the point — those funds were never spendable by a plain send — but it
is why the merge order below matters.
Merge order
This must not land before the sweep fix. On its own it lowers what the user is offered without
giving them a way to unlock the difference, which is strictly worse than today.
Checklist:
For repository code-owners and collaborators only
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