test(platform-wallet): integration test framework + first transfer test

[Claudius-Maginificent]

Issue being fixed or feature implemented

rs-platform-wallet had a thin test surface (tests/spv_sync.rs, tests/contact_workflow_tests.rs, tests/thread_safety.rs) and no end-to-end harness exercising the full wallet → SDK → broadcast pipeline. This adds a generalised, future-extractable e2e test framework modelled on dash-evo-tool/tests/backend-e2e/, plus the first test case: passing credits between two platform addresses.

Two notable differences from DET:

1. Bank uses platform addresses (not Core asset locks) as the funding source — initial bootstrap is operator-managed out-of-band.
2. Future Core support designed in — directory is tests/e2e/ (not platform_e2e/); SPV runtime + ContextProvider modules retained (currently disabled, see below) for re-enablement when SPV stabilises.

Per user direction, production code is kept as close to upstream v3.1-dev as possible — only one real bug fix lands in src/. All test-only convenience accessors (fee_paid, address_derivation_info) were absorbed inside the test framework.

Note on branch state: at user request, the tree of PR #3585 (fix/dpns-case-and-utxo-race-v3.1-dev) was merged into this branch at commit 02cb61b30d to keep local development coherent. PR #3585 is a separate PR targeting v3.1-dev for independent review and merge. The merge in this branch is not a scope addition — it is a development-coherence integration only.

What was done?

Production code (single bug fix only)

src/wallet/platform_addresses/transfer.rs — auto_select_inputs was inserting the FULL address balance as the input contribution. The protocol enforces Σ inputs == Σ outputs (with fee strategy adjusting), so when one input had 500B credits and the requested output was 50M, the balance equation broke. Fix: trim the last selected input to required - prior_accumulated so the contribution map matches what the protocol expects. Includes new unit tests covering the trimming behaviour.

This bug affected every caller using InputSelection::Auto — not just our framework.

Cargo.toml — dev-dependencies for the e2e framework (tokio_shared_rt, tempfile, dotenvy, bip39, fs2, serde_json, simple-signer, rs-sdk-trusted-context-provider, dash-async, parking_lot, tokio-util, async-trait).

git diff origin/v3.1-dev -- packages/rs-platform-wallet/src/ shows ONLY the auto_select_inputs fix plus the items listed below.

Refactoring: removed PlatformAddressChangeSet::fee (commit 63f039a8af)

The pub fee: Credits field was added by 085734a239 to back an e2e test assertion that was refactored out before shipping. Zero test callers reference it; FFI consumers were verified clean (PlatformAddressChangeSetFFI::from only reads cs.addresses). Companion dead code in transfer.rs (fee_paid / input_count / output_count plumbing) was also removed. The is_empty() clause that treated a fee-only changeset as non-empty was a semantic mis-classification — removing it is a small correctness improvement.

Test framework (packages/rs-platform-wallet/tests/e2e/)

• framework/harness.rs — E2eContext lazy-init via OnceCell: workdir slot lock → SDK construction → TrustedHttpContextProvider → PlatformWalletManager → bank load → registry open → startup cleanup::sweep_orphans.
• framework/sdk.rs — SDK constructed with TrustedHttpContextProvider::new(network, None, cache_size). Optional PLATFORM_WALLET_E2E_TRUSTED_CONTEXT_URL env override. SPV-based context provider commented out and tracked for re-enablement.
• framework/bank.rs — BankWallet::load parses BIP-39, syncs, panics with operator-actionable message if under-funded (includes the bank's primary receive address).
• framework/wallet_factory.rs — TestWallet, SetupGuard (synchronous Drop that warns and defers to startup-sweep). setup() registers wallets in the persistent registry BEFORE returning the guard so panics leave a recoverable trail.
• framework/signer.rs — SeedBackedPlatformAddressSigner with eager DIP-17 key cache (derives 0..GAP_LIMIT keys at construction; can_sign_with is honest, no async wallet round-trip).
• framework/registry.rs — PersistentTestWalletRegistry, JSON-backed at <workdir>/test_wallets.json, atomic write-temp-+-rename.
• framework/cleanup.rs — sweep_orphans (startup) + teardown_one (per-test). Uses InputSelection::Explicit(full_balances) to bypass auto_select_inputs trim semantics; reserves SWEEP_FEE_ESTIMATE = 30M on a fee-bearer input (covers 1-3 input sweeps based on observed testnet fees).
• framework/wait_hub.rs — WaitEventHub implementing PlatformEventHandler, lock-free tokio::sync::Notify-based event bus integration. wait_for_balance is event-driven (no fixed polling).
• framework/workdir.rs — flock-based slot fallback (DET pattern, up to 10 slots) for cross-process safety.
• framework/context_provider.rs — SpvContextProvider using dash_async::block_on (runtime-flavour-agnostic). Currently disabled; module retained for re-enablement.
• framework/spv.rs — SPV start + wait_for_mn_list_synced with 600s timeout floor matching tests/spv_sync.rs precedent. Currently disabled.
• cases/transfer.rs — the first test:

  #[tokio_shared_rt::test(shared, flavor = "multi_thread", worker_threads = 12)]
  #[ignore]
  async fn transfer_between_two_platform_addresses() { /* ... */ }

  Bank funds test wallet's addr_1 with 50M; test wallet self-transfers 10M to addr_2; assertions on balances; explicit teardown sweeps remaining funds back to bank.

Documentation

• tests/e2e/README.md — operator setup, env-var table, bank pre-funding, multi-process safety, panic-safe cleanup, troubleshooting, future Core support.

How Has This Been Tested?

• cargo check --tests -p platform-wallet — clean
• cargo clippy --tests -p platform-wallet -- -D warnings — clean
• cargo fmt -p platform-wallet — applied
• Live happy-path: passes end-to-end against testnet in 24.76s:

  test cases::transfer::transfer_between_two_platform_addresses ... ok
  test result: ok. 1 passed; 0 failed; finished in 24.76s
  

  • TrustedHttpContextProvider boot: ~3s
  • Bank funded addr_1 with 50M (2.3s confirmation)
  • Self-transfer addr_1 → addr_2 (202ms confirmation)
  • Post-transfer assertions: funded=50M received=10M remaining=30755720 fee=9244280 ✓
  • Teardown sweep: ✓ clean
• Panic-recovery verified live: across multiple iteration runs, the startup sweep recovered orphan wallets from prior failed runs (startup sweep recovered orphan wallets from prior runs count=N).
• QA audit (Marvin, 9 findings): all resolved or documented as intentional. See docs/ private notes.

Breaking Changes

None.

Update: bank-rebalance refactor + spec/test consolidation (v37 → v43)

After the initial framework landed, scope expanded to cover 30+ test cases (ID, TK, PA, DPNS, CR cohorts). E2E runs surfaced a systemic flow problem: every test that funded an identity permanently moved credits from the bank's address pool to the bank's identity pool, but the sweep returned them to the identity sink — never back to the addresses. Bank addresses bled ~10 tDASH per run while ~9.58 tDASH sat trapped at the bank identity.

The fix consolidates Platform-side bank flows around a single operator-facing balance:

The operator maintains exactly ONE address balance — the bank's Platform address (tdash1kzz26…). The harness auto-rebalances Platform↔Core internally.

Eight commits implement this end-to-end, plus a sweep-cache-staleness fix and an identity-sync helper:

Commit	Type	What
2d77385a26	fix (prod)	sweep_identities_with_seed now refreshes Identity balance from chain before computing sweep amount — closes silent-leak window where cached balance > chain balance led to symmetric balance X required Y rejections. Stale-cache leak was up to 52.5% per run (20+ TK identities trapped at 14.5B-34.9B).
ab22eff963	test	IdentitySync background helper — 15 s cadence refresh of identity balance/revision/keys during test execution. Matches production sibling cadence (PlatformAddressSync, IdentityTokenSync, ShieldedSync).
1e30f633e8	test	IdentitySync cadence 3 s → 15 s + per-tick TRACE (3 s overloaded DAPI, regressed TK-005b/TK-011).
abc376b6b4	test	New framework/bank_rebalance.rs (~370 LOC + 3 unit tests). Startup drain_bank_identity_to_addresses + refill_core_from_platform_if_below_threshold (fallback if Core L1 balance < threshold). Sweep destination flipped from bank identity → bank Platform address.
8ae72fd2f5	test	provision_transfer_key_if_missing auto-adds a TRANSFER-purpose CRITICAL key to the bank identity via IdentityUpdate signed by MASTER auth key. Idempotent. Without this, the production bank identity (which has only AUTHENTICATION keys) cannot satisfy IdentityCreditTransferToAddresses's DPP-protocol TRANSFER-key requirement. Also fixes id_sweep test to target the bank address (was targeting the now-empty bank identity).
75f23eac16	test	Expose sweep delta via SweepReport.swept_identity_credits; id_sweep asserts on the returned value instead of the bank-address absolute balance (which is unobservable under parallel execution — sibling spends drain it ~5000× faster than a single sweep replenishes).
6e0fab6bc1	test	TK setup wait 60 s → 120 s; augment wait_for_balance timeout error with last_observed, polls, any_balance_change_observed (disambiguates SPV-lag from broadcast-stall).
147218332b	test	Route TK-013 + TK-014 setup through TK_SETUP_WAIT_TIMEOUT (they bypass setup_with_token_* helpers due to specialized contract shapes).

Headline win (v39 first run)

INFO bank_rebalance: provisioned TRANSFER key on bank identity
       bank_identity_id=Ge9oaXJg… key_id=2 identity_index=47735
INFO bank_rebalance: drained bank identity credits back to bank Platform address
       pre=9577295537946 post=26455100 drained=9577265537946

9 577 265 537 946 credits (~9.58 tDASH) moved bank identity → bank Platform address in 2.43 s on the first run. Subsequent runs hit the idempotent transfer-key provision no-op short-circuit + drain no-op: at fee reserve. The bank identity is now a permanently empty parking spot.

Suite trajectory (full)

Snapshot	PASS / FAIL	Notable
v32	27 / 4	Pre-funding-cut baseline
v37 (15 s cadence)	25 / 6	Bank-starvation cascade surfaced (ID-002 + id_sweep regressed)
v38 (bank-rebalance refactor)	26 / 5	ID-001/002/003/005/007 + TK-005b/011 rescued
v39 (TRANSFER key auto-provision)	26 / 5	9.58 tDASH drained on first run
v40 (sweep delta + TK 120 s)	26 / 5	id_sweep PASS via SweepReport
v41 (TK-013/014 routing)	27 / 4	All 4 remaining fails are known carries
v42 (sweep-floor chain-derive + TK funding 20.2B/30.2B)	11 / 19	Over-aggressive — state_transition_min_fees underestimated dynamic fee by ~8×
v43 (revert chain-derive; TK 21B/22B/31B; 500M/2.5B peers; PA-010 docs; PA-004b/009 rescope)	26 / 4	Restoration; PA-004b flipped PASS, PA-009/c surfaces V27-007 prod bug
v44 (ID-002b + AL-001 + 5 Found-* pins + CR-004 first-fix)	29 / 7 on 36	New pins surfaced 4 fresh failures (CR-004, ID-002b, AL-001, Found-006) — all rooted in deeper layers than initial pins assumed
v45 (V27-007 prod fix + QA-009 CR-004 math + QA-011 AL-001 split + spec reclassifications)	32 / 5 on 37	ID-002b green; V27-007 ownership-leak in transfer.rs:160 fixed
v46 (Found-024 regression pin + Found-006 rewrite + QA-014 sync_balances)	33 / 4 on 37 (+ 1 / 0 found_024 separately)	V27-007 pin landed; Found-006 RED-by-design confirmed; new QA-014 sync gap surfaced
v47 (final batch: QA-013 found_024 #[ignore], QA-015 AL-001 fee reserve, QA-016 CR-004 −2 500, QA-018 stale msgs, QA-014 full-rescan)	34 / 4 on 38	35 deterministic-PASS + 2 red-by-design pins (Found-006, Found-008) + 1 red-by-design pin (CR-004 pins dash-evo-tool#845) + 1 real fail (AL-001 SPV UTXO visibility) + 1 testnet flake (tk_007)
v48 (AL-001 SPV gate fix; TK flake #[ignore] reasons cite Found-025; Cargo.lock sync; TEST_SPEC v47 audit)	34 / 4 on 38	AL-001 two-phase SPV gate applied (403d29c3c8); TK flake attribution tightened to Found-025; status legend formalised; 17 stale matrix cells reconciled
v49 (Found-025 retarget; PR #3585 merge; PlatformAddressChangeSet::fee removed)	34 / 3 on 37	Found-025 fake-pin deleted (109 → 108 tests); #3585 tree integrated for development coherence; fee field removed from production changeset API
v50 (post-#3585 baseline; full e2e w/ ignored pins)	34 / 6 on 40	All pins reproduce deterministically; Found-022 retarget functions as designed; ID-003 wait-gate gap surfaced (since fixed in fc7e9f80a1)
v51 (rust-dashcore #756 chainlock bump scaffolding; CR-004 dust-threshold first retarget)	97 / 11 on 108	First full --include-ignored run; PA-3040, PA-005b ×3, PA-003, PA-008b surface as unclassified failures pending triage
v52 (Found-008 + Found-012/023 issues filed; CR-004 headroom tweak; rust-dashcore rev bump 5297d61a)	98 / 10 on 108	PA-008b newly green; remaining 10 fails are known red-by-design pins + AL-001 + CR-004 retarget signature shift (QA-V52-001) + PA-003/PA-005b ×3 (test-side bugs) + PA-3040

Detailed evidence and trace pointers in PR comment.

Follow-up commits since v41 (now pushed)

Commit	Type	What
08bac5ebe9	revert	Static sweep floor (50M / 30M fee reserve) restored — chain-derived formula missed dynamic per-output storage costs (~8× under-reserve).
b4d144b68a	test	Corrected TK funding (TK_OWNER_FUNDING_SIMPLE = 21B, _DISTRIBUTION = 31B, new _CONFIG_UPDATE = 22B for tk_012, TK_PEER_FUNDING = 500M, _ACTIVE = 2.5B).
20ac23ce76	docs	Cleaned 3 stale PA-010 doc references (README.md, framework/mod.rs intra-doc link, TEST_SPEC.md).
3d916e31d3	test	Rescoped PA-004b + PA-009 trim/assertion to test wallet — bank wallet no longer part of test assertions. PA-009 → PASS; PA-004b flipped PASS in v43.
6ac7d6269c	test	Removed PA-010 placeholder (no longer planned).
c73ccc5beb	test	Initial role-specific TK funding (superseded by b4d144b68a after v42 starvation).
7135b4c72e	test	IdentitySync graceful teardown — shutdown_identity_sync() wired into last-guard SetupGuard::Drop. loop exiting DEBUG now fires once per run.
f71183b923	test	First chain-derived sweep floor attempt (REVERTED by 08bac5ebe9).
5f955df6d2	docs	TEST_SPEC.md: ID-002b spec (asset-lock-funded top-up of existing identity).
5f1dbdacb1	docs	TEST_SPEC.md: CR-001/CR-003 status corrections (matrix said "not implemented" while detail said PASS); STUB/not-implemented terminology normalised; duplicate Found-bug-pins section removed.
351d52ab08	docs	TEST_SPEC.md: AL-001 spec (concurrent asset-lock builds from same wallet).
403d29c3c8	test	AL-001 SPV-visibility fix: two-phase gate added before concurrent fan-out — (1) aggregate balance via wait_for_core_balance, then (2) poll spendable_utxos(height).len() > N to confirm coin-selection sees the split UTXOs before spawning tasks. Closes the window where all concurrent top_up_identity_with_funding calls raced an empty UTXO list.
fe44be56ff	test	TK flake attribution: 5 TK #[ignore] reasons updated to cite Found-025 (rs-sdk address-sync race at address_sync/mod.rs:619) as the load-bearing cause, replacing generic "DAPI contention" language.
55288c693e	chore	Cargo.lock whitespace normalisation + rand 0.8.5 → 0.8.6 (transitive, cosmetic).
e9860beb61	docs	TEST_SPEC.md v47 status audit: 17 stale matrix cells reconciled; Found-019/020 matrix rows added; status legend formalised (red-by-design / red-real-fail / passing-as-regression).
e7e5d6daba	test	Found-025 retarget: delete 176-LOC fake-pin; replace with 70-LOC documented stub (no #[test]). TEST_SPEC status → red-by-design — pending upstream test-hook surface. e2e test count 109 → 108.
02cb61b30d	merge	Integrate PR #3585 tree (fix/dpns-case-and-utxo-race-v3.1-dev) for development coherence. Conflict resolution: broadcast.rs and dpns_usernames/mod.rs took #3585's version; error.rs was a manual union of disjoint error variants (HEAD's GapLimitExceeded + NoSelectableInputs; theirs' ConcurrentSpendConflict + NoSpendableInputs).
63f039a8af	refactor (prod)	Remove PlatformAddressChangeSet::fee and companion dead code from transfer.rs.

Production code surface from this update

• src/wallet/identity/network/auto_select_inputs.rs — sweep refresh from chain (commit 2d77385a26). No public API change.
• src/wallet/platform_addresses/transfer.rs — ownership guard in post-broadcast ledger update (V27-007 fix, 16636f01c0); dead fee_paid / input_count / output_count plumbing removed (63f039a8af).
• src/wallet/platform_addresses/changeset.rs — fee: Credits field and its is_empty() clause removed (63f039a8af).
• src/wallet/platform_addresses/withdrawal.rs — defensive ownership guard added (16636f01c0).

No public API additions, no breaking changes.

Current failure classification

Test	Classification	Why it's red
cr_004_legacy_bip32_utxo_update_after_spend	red-by-design	Pins upstream dash-evo-tool#845 — BIP-32 post-broadcast UTXO not cleared. Test math (Marvin QA-008/QA-016) and next_unused contract ruled out across 3 fix attempts. Fails deterministically until upstream fix lands.
found_006_topup_index_ignored	red-by-design	Pins upstream CreditOutputFunding missing top_up_index at asset_lock_builder.rs:41-48. Passes only when upstream key-wallet API addition lands.
found_008_lock_notify_missed_wakeup	red-by-design (inverted pin)	Cargo PASS = bug confirmed. Notify::notify_waiters() drops a lock event when the notify precedes waiter registration. Fix requires notify_one() semantics.
al_001_concurrent_asset_lock_builds	red-real-fail (fix in flight)	SPV UTXO-index visibility gap under concurrent load. Two-phase SPV gate applied at 403d29c3c8 — outcome to be confirmed in next testnet run (tracked at task #382).

PA-004b, PA-009, ID-002b all flipped PASS via V27-007 + QA-014 fixes. PA-010 was removed entirely. Found-025 test deleted (count 109 → 108; see "New spec entries" below).

TK-suite flake root cause — pinned (Found-025)

Throughout the saga, TK tests intermittently failed with wait_for_balance timed out + any_balance_change_observed=false (tk_001c/tk_002 v43, tk_006 v44, tk_011 v45, tk_007 v47). Initial hypotheses: DAPI replica lag, bank credit-pool depletion, Drive block-inclusion delay.

Three-phase diagnostic workstream resolved this:

• Phase 1 (Marvin audit) — identified 6 diagnostic gaps in bank.fund_address / wait_for_balance / DAPI client / bank-balance monitoring.
• Phase 2 (Bilby commit 5cca0fbd1a) — added trace-level enrichment (logging-only): bank.fund_address broadcast-accepted INFO includes ?target = addr, credits, seq, attempt, elapsed_ms; wait_for_balance timeout error enriched with grep hint pointing to the originating broadcast log + tx hash.
• Phase 3 (Marvin reproduction) — hit the flake on the first run of cargo test -- cases::tk_ under default parallelism. Pinpointed the exact failure site at address_sync/mod.rs:619.

All three original hypotheses eliminated. The bug is in upstream rs-sdk. Found-025 is documented as a stub (tests/e2e/cases/found/found_025.rs) pending an upstream test-hook surface. The 5 affected TK tests cite Found-025 explicitly in their #[ignore] reason text.

Reinstating a genuine Found-025 pin requires an upstream rs-sdk refactor — either an apply_balance_updates inner-function extraction or a transport-trait seam that lets Sdk::new_mock() return proof-verified responses.

TK suite operational reality: TK-001 through TK-014 are GREEN under live testnet when running with --test-threads=1 or --test-threads=2. Intermittent flakes under higher parallelism are Found-025 — not random noise.

V27-007 production fix

src/wallet/platform_addresses/transfer.rs:160 had an ownership-leak in the post-broadcast ledger-update loop: the SDK response's foreign post-credit balance was written into the source wallet's local ledger via set_address_credit_balance without an ownership check. Symptom chain: total_credits() reported the foreign balance → dust-gate check inflated → spurious sweep attempt → No private key for address P2pkh(...) signer panic. Fix: if account.contains_platform_address(&p2pkh) guard, mirroring fund_from_asset_lock.rs:77. Pinned at Found-024. Same guard added defensively at withdrawal.rs.

Asset-lock subsystem audit (handoff-ready)

Marvin audited upstream key-wallet (rust-dashcore @ d6dd5da) for asset-lock correctness issues. Output: handoff-ready for the rust-dashcore team.

5 upstream findings (1 HIGH + 2 MEDIUM + 2 LOW):

#	Severity	Issue
1	HIGH	CreditOutputFunding plumbs only identity_index; DerivationPath::identity_top_up_path(network, identity_index, top_up_index) exists at key-wallet/src/bip32.rs:1062-1077 but the second index never reaches it. Root cause of Found-006 downstream.
2	MEDIUM	TransactionRecord::update_context (transaction_record.rs:181-184) silently drops InstantLock state on InstantSend → InBlock transition.
3	MEDIUM	AssetLockBuilder::build marks change-pool index used BEFORE build can fail (asset_lock_builder.rs:242 → :292). Doc-comment "no addresses consumed if build fails" is misleading.
4	LOW	Missing find_transaction_record(&Txid) helper forces every consumer to roll their own loop — predictably misses CoinJoin / BIP-32 accounts (Found-012 in downstream).
5	LOW	AssetLockFundingType doc-comments cite wrong DIP-9 indices (5'/1' not 5'/0'; 5'/2' not 5'/1').

Refuted hypotheses: Found-008 (notify_waiters) is purely downstream; Found-013 (error swallowing) is downstream flattening rich upstream variants; next_private_key is NOT idempotent (calls mark_index_used before return).

TEST_SPEC.md status taxonomy

The spec now uses three precisely-defined status values for red/failing entries (per v47 audit, commit e9860beb61):

• red-by-design — test is #[ignore]'d and expected to fail until a specific upstream fix lands; the failure documents the bug contract. (Found-006, Found-008, CR-004)
• red-real-fail — test exists and runs but fails for a reason that is not a designed pin — a genuine regression or gap under active investigation. (AL-001, TK-007 intermittent)
• passing-as-regression — test passes today, pinning a now-fixed bug contract. A future regression flips it RED. (Found-024, Found-020)

Retired terms: failing and failing-by-design — replaced by the above.

Found-025 carries a separate status: red-by-design — pending upstream test-hook surface (stub only, no #[test] attribute).

New spec entries (TEST_SPEC.md)

• ID-002b — Asset-lock-funded top-up of existing identity (P1, blocked on Core bank funding). Coverage gap: top_up_identity_with_funding with TopUpFundingMethod::FundWithWallet has zero e2e test.
• AL-001 — Concurrent asset-lock builds from same wallet (P1, red-real-fail). New AL category for asset-lock-primitive tests.
• Found-019 and Found-020 — Added to Found-bug-pins matrix (previously had detail sections but no matrix rows).
• Found-021 — Implemented as red-by-design test pin. Pure unit test, no harness — fails today against the upstream key-wallet defect (IS-lock dropped on InBlock promotion).
• Found-022 retarget (262ba3455f) — Original internal_addresses.highest_used assertion was wrong-from-inception: the defect path advances highest_generated, not highest_used, and next_unused early-returns from the gap-limit-pre-populated window without mutating the pool. Empirical diagnostic identified bump_monitor_revision() at managed_core_funds_account.rs:540 as the unconditional side-effect on the failed build_asset_lock path; the test now snapshots monitor_revision pre-/post-build and asserts no advance. Still red-by-design; reproduces deterministically.
• Found-025 retarget (e7e5d6daba) — Marvin's red-by-design sweep identified the v47-era pin as a fake: the test built a local HashMap from two pre-registered addresses and asserted .get() for a third key — an assertion that could never distinguish bug-present from bug-fixed, and one that never called sync_address_balances. The broken 176-LOC pin was deleted. A 70-LOC documented stub (#[cfg(test)] module, no #[test]) replaces it with a clear blocker note. Status: red-by-design — pending upstream test-hook surface. Reinstating a genuine pin requires either an apply_balance_updates extraction in rs-sdk or a transport-trait seam compatible with Sdk::new_mock().
• TK-011 / TK-013 / TK-014 wait gates (6951523575, 6bb0017adf, c00f1d43aa) — Added wait_for_token_balance between the token state-transition and the post-state probe. Mirrors the gating pattern already used by TK-001 / TK-004 / TK-007 / TK-008 / TK-009. Eliminates a class of intermittent v48/v49 flakes orthogonal to Found-025.

PR #3585 merge — UTXO race fix + DPNS improvements

Commit 02cb61b30d integrates the fix/dpns-case-and-utxo-race-v3.1-dev tree into this branch at user request. This is a development-coherence merge only — PR #3585 remains a separate PR targeting v3.1-dev for independent review and merge.

What lands from #3585:

• New wallet/core/reservations.rs — OutpointReservations system with RAII guard that prevents concurrent UTXO double-spend at the reservation level rather than detecting it post-build.
• DPNS case-insensitive .dash handling.
• 7 new lib tests including concurrent_same_utxo_sends_resolve_via_reservation_set (real tokio::spawn concurrency) and broadcast_failure_releases_reservation_for_retry.

Conflict resolution (3 conflicts):

• broadcast.rs — took fix: case-insensitive .dash + atomic state on broadcast failure #3585's version (reservation-based approach is the superior solution).
• dpns_usernames/mod.rs — took fix: case-insensitive .dash + atomic state on broadcast failure #3585's version.
• error.rs — manual union merge: HEAD's GapLimitExceeded + NoSelectableInputs (Platform credit errors) and fix: case-insensitive .dash + atomic state on broadcast failure #3585's ConcurrentSpendConflict + NoSpendableInputs (Core UTXO errors) are semantically distinct despite superficially similar names.

Marvin audit notes — both resolved:

• 603b444425's fresh-state revalidation on build is superseded by the reservation guard — defense-in-depth layer gone — fixed in bd5eb6120 (backport of 371e2c3742 from PR fix: case-insensitive .dash + atomic state on broadcast failure #3585). Re-fetches spendable_utxos(current_height) after build_signed inside the same write lock; aborts with ConcurrentSpendConflict if any selected outpoint disappeared. Reservation system remains primary defense; this is restored defense-in-depth.
• GapLimitExceeded variant has no production constructor — candidate for cleanup — fixed in 926f0a7e0d. Variant deleted from error.rs; e2e framework now uses a local GapLimitError enum in framework/gap_limit.rs (Exceeded + Wallet(Box<PlatformWalletError>)) — test-only, doesn't pollute the production error type.

Companion PRs

• PR fix: case-insensitive .dash + atomic state on broadcast failure #3585 (fix/dpns-case-and-utxo-race-v3.1-dev) — UTXO race fix via OutpointReservations + DPNS case-insensitive handling. Its tree is integrated into this branch at 02cb61b30d for development coherence. PR fix: case-insensitive .dash + atomic state on broadcast failure #3585 targets v3.1-dev independently and will merge on its own review cycle.
• PR feat(platform-wallet): add birth_height_override to wallet creation API #3636 (feat(rs-platform-wallet): add birth_height_override to wallet creation API) — Splits out the birth_height_override parameter on wallet_lifecycle.rs (commit fcb1ac323b) for independent review. That parameter has a hard correctness customer (bank wallet requires Some(0) for genesis-scan to see pre-test funding) and also fixed a real in-memory/persisted divergence bug. Split per user direction; the e2e branch retains the commit.

Issues raised from this PR's e2e triage

Upstream defects surfaced and pinned by this branch's e2e suite. Each has a deterministic #[ignore]d test in tests/e2e/cases/ that flips green when the upstream fix lands.

dashpay/platform:

• #3641 — Found-008: LockNotifyHandler::notify_waiters() drops lock events arriving in wait_for_proof's check/await gap (concurrent asset-lock builds stall on FinalityTimeout)
• #3642 — Found-012: wait_for_proof and recover_asset_lock_blocking hard-code BIP-44 — asset-lock proof flow misses CoinJoin / legacy BIP-32 funding

dashpay/rust-dashcore:

• #762 — Add top_up_index field to CreditOutputFunding::IdentityTopUp (DIP-9 conformance gap)
• #763 — Found-021: TransactionRecord::update_context silently drops InstantLock on InBlock/InChainLockedBlock promotion
• #764 — Found-022: TransactionBuilder::set_funding mutates funds account before build_signed can fail — phantom monitor_revision bumps on failed builds

Outstanding (deferred)

• SPV re-enablement (Task fix(sdk): hash is not a function #15 internal): re-enable SPV start + SPV-based ContextProvider once SPV cold-start is reliable on testnet. Modules retained, harness blocks commented out.
• Per-address transaction history (out of scope): scoped at ~2000-3000 LOC across Drive (state-tree change + breaking platform-version bump), SDK, wallet, FFI, Swift. Recommended as a separate ADR + multi-PR rollout. Full scope analysis kept in private notes.
• Sweep fee estimator dynamic refinement (latent): SWEEP_FEE_ESTIMATE = 30M is a constant calibrated against observed testnet fees (1-input ~9.5M, 2-input ~21M). Long-term: derive from transfer::estimate_fee_for_inputs (currently private) — needs a small public helper.
• Found-025 reinstatement (upstream dependency): genuine pin requires either an apply_balance_updates inner-function extraction in rs-sdk or a transport-trait seam compatible with Sdk::new_mock(). Tracked as a follow-up for the rs-sdk team.
• ID-003 wait-gate (from v50 e2e run, MEDIUM) — fixed in fc7e9f80a1. Inserted wait_for_identity_balance_change (canonical post < pre gate already used by TK-006/007/008 — wait_for_identity_balance would have been wrong shape since it's a >= floor helper and the sender's balance debits across an identity-to-identity transfer).

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests (this IS the e2e test framework)
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any (no breaking changes)
• I have made corresponding changes to the documentation if needed (README + module-level rustdoc)

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

_{🤖 Co-authored by Claudius the Magnificent AI Agent}

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📝 Walkthrough

Walkthrough

An end-to-end testing framework for rs-platform-wallet is added with shared process context, bank wallet funding, persistent wallet registry, cleanup/orphan sweeping, and complete test infrastructure including configuration management, SDK setup, event notification, and example test cases demonstrating transfers between platform addresses. Related SDK modules are also exposed for external use, and seed-based signer constructors are introduced.

Changes

Cohort / File(s)	Summary
E2E Framework Infrastructure packages/rs-platform-wallet/tests/e2e/framework/config.rs, workdir.rs, registry.rs	Environment variable loading with .env file support, workdir slot reservation with exclusive file locking, and persistent JSON-backed wallet seed registry with atomic writes and corruption recovery.
E2E Harness & Context packages/rs-platform-wallet/tests/e2e/framework/harness.rs, mod.rs	Process-shared E2eContext initialization via OnceCell, SDK/wallet manager/bank/registry/event-hub injection, setup utilities for seed generation and test wallet creation with registry entry insertion.
Bank Wallet & Funding packages/rs-platform-wallet/tests/e2e/framework/bank.rs	BIP-39 mnemonic-backed bank wallet with minimum-credit validation, DIP-17 address derivation, and concurrent-safe fund transfers using global async mutex to prevent nonce races.
Cleanup & Lifecycle packages/rs-platform-wallet/tests/e2e/framework/cleanup.rs, wallet_factory.rs	Orphan wallet sweeping at startup with fund drainage and registry status updates, per-test teardown with unregistration, plus test wallet factory with address selection, balance sync, and cleanup guards.
SDK & Event Infrastructure packages/rs-platform-wallet/tests/e2e/framework/sdk.rs, wait_hub.rs, context_provider.rs	SDK construction with TrustedHttpContextProvider, testnet DAPI endpoint defaults, WaitEventHub for event-driven async test waits, and SpvContextProvider implementing platform SDK context bridge.
Wait & Polling Utilities packages/rs-platform-wallet/tests/e2e/framework/wait.rs, spv.rs	Generic polling loop with timeout, event-driven balance-change waiter with sync/notification integration, SPV client startup and masternode-list sync readiness checker with progress logging.
E2E Test Cases & Entry Points packages/rs-platform-wallet/tests/e2e.rs, cases/mod.rs, cases/transfer.rs, README.md, .env.example	Integration test root module, test case organization, fund-and-transfer example test verifying fee deduction, framework documentation with operator setup requirements and architecture overview, and environment configuration template.
Cargo Dependencies packages/rs-platform-wallet/Cargo.toml	Dev-dependency additions: tokio-shared-rt, tempfile, dotenv, bip39, fs2, parking_lot, simple-signer, SDK context provider, plus tokio-util rt feature.
SDK Public API Exposure packages/rs-sdk/src/platform/transition.rs, transition/address_inputs.rs	Module visibility change from crate-restricted to public; functions fetch_inputs_with_nonce and nonce_inc exposed for external callers.
Signer Feature & Constructors packages/simple-signer/Cargo.toml, signer.rs	New derive feature pulling key-wallet and thiserror dependencies; two seed-based constructors for platform-address and identity signers with BIP-32 derivation and error mapping.

Sequence Diagram(s)

sequenceDiagram
    participant Test as E2E Test
    participant Harness as E2eContext Harness
    participant Registry as Wallet Registry
    participant Bank as BankWallet
    participant TWallet as TestWallet
    participant Manager as PlatformWalletManager
    participant SDK as SDK/PlatformWallet
    participant Cleanup as Cleanup

    Test->>Harness: init() first call
    Harness->>Registry: open(test_wallets.json)
    Harness->>Cleanup: sweep_orphans()
    Cleanup->>Registry: list_orphans()
    Cleanup->>Manager: create from orphan seed
    Cleanup->>SDK: sync & drain to bank
    Cleanup->>Registry: remove_orphan_entry
    Harness->>Bank: load from mnemonic
    Harness->>Bank: sync_balances()
    Harness->>Bank: fund_address(test_addr1, credits)
    Harness->>SDK: transfer via bank wallet
    Test->>Test: setup() generates seed
    Test->>Manager: create TestWallet
    Test->>TWallet: create(seed)
    Test->>TWallet: next_unused_address() → addr2
    Test->>Bank: fund_address(addr2, TRANSFER_CREDITS)
    Test->>SDK: transfer via bank
    Test->>TWallet: wait_for_balance(addr2, expected)
    TWallet->>SDK: sync_balances()
    Test->>SDK: transfer(addr2 → addr1, TRANSFER_CREDITS)
    SDK->>SDK: execute, compute fee
    Test->>TWallet: verify balances & fee
    Test->>Test: teardown()
    Test->>Cleanup: teardown_one(test_wallet)
    Cleanup->>TWallet: drain all addresses to bank
    Cleanup->>Registry: remove_entry

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Estimated code review effort

🎯 4 (Complex) | ⏱️ ~50 minutes

---

🐰 Hopping through the test warren,
New E2E frames make wallets soar-in',
Bank funds and registry keep,
While cleanup sweeps run deep,
SDK paths now public—hooray, no more hide-n'! 🌙✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding an integration test framework and the first transfer test for platform-wallet, which aligns with the extensive test infrastructure added across the changeset.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
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[Copilot]

Pull request overview

Adds an end-to-end (wallet → SDK → broadcast) integration test harness to rs-platform-wallet and introduces the first live test case (address-funds transfer), alongside a production fix to InputSelection::Auto input selection so generated transitions satisfy protocol structure rules.

Changes:

• Added a reusable E2E framework under packages/rs-platform-wallet/tests/e2e/ (workdir slot locking, bank wallet, persistent registry, cleanup/sweep, wait hub, signer, SDK wiring).
• Added the first E2E test case: transferring credits between two platform-payment addresses in a test wallet (ignored by default).
• Fixed auto_select_inputs in production code to avoid selecting full balances as “input credits”, and added unit tests for the selection logic.

Reviewed changes

Copilot reviewed 21 out of 22 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
packages/rs-platform-wallet/src/wallet/platform_addresses/transfer.rs	Fixes auto input selection; adds pure helper + unit tests for selection behavior.
packages/rs-platform-wallet/tests/e2e.rs	Adds the integration test crate root and module wiring for the e2e suite.
packages/rs-platform-wallet/tests/e2e/README.md	Operator/setup documentation for running live e2e tests.
packages/rs-platform-wallet/tests/e2e/cases/mod.rs	Declares e2e test modules.
packages/rs-platform-wallet/tests/e2e/cases/transfer.rs	First e2e test exercising funding + self-transfer + teardown.
packages/rs-platform-wallet/tests/e2e/framework/mod.rs	Framework public surface (setup, errors, prelude) and module layout.
packages/rs-platform-wallet/tests/e2e/framework/harness.rs	E2eContext singleton init: config, workdir locking, SDK, manager, bank, registry, startup sweep.
packages/rs-platform-wallet/tests/e2e/framework/config.rs	Env/.env configuration loader for the harness.
packages/rs-platform-wallet/tests/e2e/framework/sdk.rs	Constructs dash_sdk::Sdk with TrustedHttpContextProvider and DAPI address resolution.
packages/rs-platform-wallet/tests/e2e/framework/workdir.rs	Cross-process workdir slot selection via flock.
packages/rs-platform-wallet/tests/e2e/framework/panic_hook.rs	Installs panic hook to cancel background work on panic.
packages/rs-platform-wallet/tests/e2e/framework/wait_hub.rs	Notify-based hub bridging wallet/SPV/platform events to async waiters.
packages/rs-platform-wallet/tests/e2e/framework/wait.rs	Async waiting helpers (event-driven balance wait + generic polling).
packages/rs-platform-wallet/tests/e2e/framework/signer.rs	Seed-backed Signer<PlatformAddress> with eager DIP-17 key cache.
packages/rs-platform-wallet/tests/e2e/framework/wallet_factory.rs	Test wallet factory + SetupGuard (panic-safe registry-backed lifecycle).
packages/rs-platform-wallet/tests/e2e/framework/registry.rs	JSON-backed persistent registry for panic-safe orphan recovery.
packages/rs-platform-wallet/tests/e2e/framework/cleanup.rs	Startup sweep + per-test teardown draining funds back to bank.
packages/rs-platform-wallet/tests/e2e/framework/bank.rs	Loads and syncs a pre-funded bank wallet; serialized funding API.
packages/rs-platform-wallet/tests/e2e/framework/context_provider.rs	Retained (disabled) SPV-backed SDK context provider module for future re-enable.
packages/rs-platform-wallet/tests/e2e/framework/spv.rs	Retained (disabled) SPV startup/readiness helpers for future re-enable.
packages/rs-platform-wallet/Cargo.toml	Adds dev-dependencies needed by the e2e harness.
Cargo.lock	Locks new/updated dependencies for the added test tooling.

---

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[lklimek]

v52 e2e run — b1d35e497e

98 PASS / 10 FAIL on 108 (wall-clock 645 s, --test-threads=14, --include-ignored). rust-dashcore rev 5297d61a confirmed in build (picks up dashpay/rust-dashcore#756 chainlock-driven InBlock → InChainLockedBlock promotion + WalletEvent::TransactionsChainlocked).

Failure classification

Test	Class	Fingerprint
al_001_concurrent_asset_lock_builds	red-real-fail	FinalityTimeout(<txid>) at line 306 — unchanged shape vs v51. Found-008 (#3641) wait-gap still drops the lock; rust-dashcore #756 fallback present in binary but InChainLockedBlock / TransactionsChainlocked absent from 1.6 MB TRACE log → fallback not reached before 300 s wait_for_proof timeout.
cr_004_legacy_bip32_utxo_update_after_spend	red-by-design (signature shifted)	QA-V52-001 — signature shift vs v51: failure mode moved from bip32_count_post=1 to NoSpendableInputs { account_type: BIP32Account, ..., context: "all UTXOs used or reserved by in-flight transactions" } at line 264. Commit 6955138813 (dust 2730→546, headroom 2500→700) shifted the failure into the second-build coin-selection path; assertion still wrong-shape for realized behaviour.
found_006_topup_index_ignored	red-by-design	upstream CreditOutputFunding missing top_up_index — pinned at dashpay/rust-dashcore#762. Unchanged.
found_021_instant_lock_dropped_on_context_promotion	red-by-design	update_context naive replace overwrites IS-lock on InBlock promotion — pinned at dashpay/rust-dashcore#763. Unchanged.
found_022_asset_lock_builder_consumes_change_index_on_failure	red-by-design	set_funding eager next_change_address(add_to_state=true) bumps monitor_revision on failed builds — pinned at dashpay/rust-dashcore#764. Unchanged.
pa_003_fee_scaling	test-bug	fee_1=9402620, fee_5=8250040 — 5-output fee less than 1-output fee. Test's pre-broadcast estimate baseline is incorrect; not a production defect.
pa_005b_gap_limit_triplet_subcase_a	test-bug / harness regression	gap_limit-1 must succeed: Exceeded { requested: 19, available: 1, highest_used: Some(0), highest_generated: Some(19), gap_limit: 20 }. Pool pre-populated at construction; test asserts on a window the framework already burned.
pa_005b_gap_limit_triplet_subcase_b	test-bug / harness regression	same shape as _a at boundary requested=20.
pa_005b_gap_limit_triplet_subcase_c	test-bug / harness regression	assertion left == right failed: left: 1 right: 20 — same root cause as _a/_b.
pa_3040_reduce_output_chain_time_fee_must_not_exceed_static_estimate	red-by-design	AddressesNotEnoughFundsError, required 14939900 — pins fee-estimator drift on reduce-output chains.

Δ vs v51

• pa_008b_two_wallets_six_concurrent_funders newly GREEN — was failing in v51 as unclassified concurrency-race; now passes within the 60+ s window. Either v51 was a flake or one of the intermediate commits stabilised the harness path. No fix specifically targeted at this test — track as "stable until reproduced".
• No regressions: zero v51-green tests went red in v52. The rust-dashcore rev bump (53130869 → 5297d61a) and the CR-004 headroom retarget did not break any previously passing test.
• AL-001 unchanged shape: panic site + message byte-identical to v51 (FinalityTimeout at line 306). Found-008's downstream impact remains unblocked under concurrent IS-lock-miss; the new chainlock-fallback branch from rust-dashcore fix: ua-parser-js vulnerability  #756 is reachable in principle but is not entered for AL-001 under current timeout (wait_for_proof expires before chainlock arrives for the racing tx).
• CR-004 signature shift is the lone real regression-against-expectation: the retarget at 6955138813 was supposed to flip CR-004 green; instead the test still fails but on a different assertion path. The realised behaviour matches the spec but the test's post-condition checks the wrong variant. QA-V52-001: rewrite assertion against NoSpendableInputs instead of TransactionBuild, or recalibrate headroom further.

Confirmed by this run

• rust-dashcore fix: ua-parser-js vulnerability  #756 (chainlock-driven context promotion + WalletEvent::TransactionsChainlocked) integrated cleanly. No build/link surprises; match-arm coverage in core_bridge.rs and balance_handler.rs validated under TRACE.
• All five filed upstream issues (Found-008: LockNotifyHandler::notify_waiters() drops lock events arriving in wait_for_proof's check/await gap (concurrent asset-lock builds stall on FinalityTimeout) #3641, Found-012: wait_for_proof and recover_asset_lock_blocking hard-code BIP-44 — asset-lock proof flow misses CoinJoin / legacy BIP-32 funding #3642, feat(dpp): wasm-dpp: integration tests for document #762, fix wasm-dpp for identity v2 #763, refactor: renamed a few query methods and added a few to query Drive … #764) have deterministic pin tests in this run — each fires its expected assertion, with file:line:panic-signature stable across v51 → v52.
• Suite stability profile improved: 96 of 98 passing tests are now always-green across v50/v51/v52 (only pa_008b is a stability newcomer).

Follow-up tracked

• QA-V52-001 (CR-004 assertion rewrite, MEDIUM): align the post-condition with the realised error variant — NoSpendableInputs is the truthful outcome on a fully-drained BIP-32 account; the test as currently written expects TransactionBuild.
• QA-V52-002 (AL-001 fallback trace visibility, LOW): extend RUST_LOG targets to include the wallet asset-lock proof module explicitly so the chainlock-fallback path is observable from logs. Does not affect test outcome; affects only the diagnostic clarity of "was the fallback reached?".
• AL-001 full-green: still blocked on upstream LockNotifyHandler switch from notify_waiters() → notify_one() (Found-008 / Found-008: LockNotifyHandler::notify_waiters() drops lock events arriving in wait_for_proof's check/await gap (concurrent asset-lock builds stall on FinalityTimeout) #3641).
• PA-005b ×3: harness regression — gap-limit pre-population by WalletAccountCreationOptions::Default invalidates the triplet's assertion baseline. Test-side fix.
• PA-003: fee-estimator baseline error in the test. Production behaviour is internally consistent; test is wrong.

Marvin's full report saved locally (~1.5 MB log at /tmp/e2e-run-v52-JKjzwc.log).

_{🤖 Co-authored by Claudius the Magnificent AI Agent}