refactor: casino table core; fix: stake/migration/validation gaps

1 files changed, 19 insertions, 11 deletions

diff --git a/internal/casino/machine.go b/internal/casino/machine.go
index 83e018f..f285518 100644
--- a/internal/casino/machine.go
+++ b/internal/casino/machine.go
@@ -30,6 +30,11 @@ type Machine struct {
 	inFreeSpins     bool
 	spinBet         int
 	payoutRemainder float64
+	// stakeID is the wallet handle of the wager committed to the current
+	// round (the triggering wager for a free-spin feature). Resolving by
+	// handle — not the player-wide ResolveStakes — keeps an older
+	// failed-payout stake open as recovery evidence when a new round starts.
+	stakeID string
 	// featureBank holds the winnings of a paid round whose free-spin feature
 	// is still running. They are paid as ONE settlement when the feature
 	// ends: see finishSpin for why no payout may be journaled while the
@@ -105,11 +110,13 @@ func (m *Machine) start(name string, wallet Wallet) []Event {
 }
 
 func (m *Machine) beginSpinLocked(amount int, wallet Wallet, publicMessage, privateMessage string) []Event {
-	if _, err := wallet.Wager(amount); err != nil {
+	wager, err := wallet.Wager(amount)
+	if err != nil {
 		return m.private(walletErrorMessage(err, "You don't have enough chips and credits for that bet."))
 	}
 	m.bet = amount
 	m.spinBet = amount
+	m.stakeID = wager.ID
 	m.player.Wallet = wallet
 	m.stakeFailed = false
 	m.spin = generateSlotSpinWithProfile(m.rng, m.spinBet, m.profile)
@@ -209,9 +216,11 @@ func (m *Machine) autoBetTick() []Event {
 			m.autoBet = false
 			return m.private("Autobet stopped: no wager is set.")
 		}
-		if _, err := m.player.Wallet.Wager(m.bet); err != nil {
+		if wager, err := m.player.Wallet.Wager(m.bet); err != nil {
 			m.autoBet = false
 			return m.private(walletErrorMessage(err, "Autobet stopped: you don't have enough chips and credits for that bet."))
+		} else {
+			m.stakeID = wager.ID
 		}
 		m.spinBet = m.bet
 		m.stakeFailed = false
@@ -328,13 +337,15 @@ func (m *Machine) finishSpin() []Event {
 		m.inFreeSpins = false
 		if !payFailed && m.player.Wallet != nil {
 			// The paid round fully resolved (the feature either never
-			// started or just completed; free spins wager nothing): the
-			// stake is no longer outstanding.
-			m.player.Wallet.ResolveStakes()
+			// started or just completed; free spins wager nothing): resolve
+			// ONLY this round's stake, so an older failed-payout stake stays
+			// open as recovery evidence.
+			m.player.Wallet.ResolveStake(m.stakeID)
+			m.stakeID = ""
 			m.stakeFailed = false
 		}
 		if !m.autoBet {
-			events = append(events, m.menuEvents("")...)
+			events = append(events, m.privateMenu("")...)
 		}
 	}
 	return events
@@ -362,12 +373,13 @@ func (m *Machine) leave(name string) []Event {
 // unresolved for recovery (or the shutdown refund) to complete.
 func (m *Machine) resetSeat() {
 	if m.player != nil && m.player.Wallet != nil && !m.stakeFailed {
-		m.player.Wallet.ResolveStakes()
+		m.player.Wallet.ResolveStake(m.stakeID)
 	}
 	m.player = nil
 	m.bet = 0
 	m.spin = nil
 	m.spinBet = 0
+	m.stakeID = ""
 	m.phase = machineReady
 	m.reel, m.clock, m.suspense = 0, 0, false
 	m.freeSpins = 0
@@ -496,10 +508,6 @@ func (m *Machine) privateMenu(prefix string) []Event {
 	return events
 }
 
-func (m *Machine) menuEvents(prefix string) []Event {
-	return m.privateMenu(prefix)
-}
-
 // refundAll refunds any outstanding stake at graceful shutdown/eviction and
 // then DISCARDS the round (the machine closes with the process). The wallet
 // resolves every outstanding stake exactly once; a completed spin has no