Files
link/patches/BridgeVendorSale.cs
colby 81d3553492 Phase 7: PlayerVendorSale core event + subscriber
The one non-drop-in piece. Player-vendor purchases raise no EventSink, so the
sale is invisible to subscription. Two git-format core patches add a
PlayerVendorSale event and raise it at the committed sale in
PlayerVendorBuyGump.OnResponse (right after HoldGold +=), where buyer, vendor
owner, item, price, and commission are all in scope. The subscriber
BridgeVendorSale emits vendor.sale.

All three are a coupled unit. The subscriber references PlayerVendorSaleEventArgs,
which does not exist until the EventSink patch is applied, so it lives in patches/
not overlay/ -- shipping it in overlay would break the build on any unpatched
install. patches/README.md documents applying the unit; both patches verified
with git apply --check against stock ServUO 57.4. This is the first phase that
rebuilds the core (ServUO.exe), not just Scripts.dll.

vendor.sale carries buyer and vendor-owner accounts, both present and distinct,
which is the pair that flags gold-laundering when they match -- richer than the
ownerless NPC ValidVendor* events, and on a committed sale rather than a
validation stage.

Verified with a probe firing the event on real seeded-vendor data: vendor.sale
emitted with buyerAcct=seed_001, ownerAcct=seed_000, Longsword, price 69819. The
probe proves the event, args, subscriber, and payload; the literal gump call site
firing on a real purchase needs a live buyer with a NetState and is confirmed by
an in-game buy. Evidence in docs/PLAN.md §17.

This completes every phase on the ServUO side. Phases 0-6 are drop-in (overlay/);
7 is patches/. Cheat signals are folded into existing streams (fastwalk, audit,
vendor.sale), not a separate phase. Remaining work is the Rust sidecar.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-10 15:46:07 -05:00

84 lines
3.1 KiB
C#

using System;
using Server;
using Server.Accounting;
using Server.Custom.Bridge;
namespace Server.Custom.Bridge
{
/// <summary>
/// Subscribes to the PlayerVendorSale event added by the Phase 7 core patches. This file is
/// part of that coupled unit and is NOT in overlay/, because it references
/// PlayerVendorSaleEventArgs, which does not exist until the EventSink patch is applied —
/// shipping it in overlay/ would break the build on any install without the patch.
///
/// Deploy: apply patches/playervendor-sale-*.patch, then copy this file to
/// Scripts/Custom/Bridge/BridgeVendorSale.cs.
///
/// The event fires at the committed sale (PlayerVendorBuyGump.OnResponse), on the Core
/// thread, with buyer, vendor owner, item, price, and commission all in scope — richer than
/// the NPC ValidVendor* events (which lack owner and commission) and, unlike them, on a
/// committed sale rather than a validation stage. It is the backbone of the cheat-detection
/// feed: same-account buyer≈owner is gold laundering, off-market prices and burst patterns
/// are visible to the sidecar.
/// </summary>
public static class BridgeVendorSale
{
public static void Initialize()
{
if (!BridgeConfig.Enabled)
return;
EventSink.PlayerVendorSale += OnPlayerVendorSale;
Console.WriteLine("[Bridge] player-vendor sale stream attached");
}
private static void OnPlayerVendorSale(PlayerVendorSaleEventArgs e)
{
try
{
var sb = BridgeJson.Begin("vendor.sale")
.Bool("committed", true);
// Buyer
if (e.Buyer != null)
{
sb.Ser("buyerSerial", e.Buyer.Serial);
var ba = e.Buyer.Account as Account;
if (ba != null)
sb.Str("buyerAcct", ba.Username);
}
// Vendor owner — the player who actually profits.
if (e.Owner != null)
{
sb.Ser("ownerSerial", e.Owner.Serial);
var oa = e.Owner.Account as Account;
if (oa != null)
sb.Str("ownerAcct", oa.Username);
}
if (e.Vendor != null)
sb.Ser("vendorSerial", e.Vendor.Serial);
if (e.Item != null)
{
sb.Ser("itemSerial", e.Item.Serial);
sb.Str("itemType", e.Item.GetType().Name);
sb.Num("itemId", e.Item.ItemID);
sb.Num("amount", e.Item.Amount);
}
sb.Num("price", e.Price);
sb.Num("commission", e.Commission);
BridgeLink.Emit(sb.End());
}
catch (Exception ex)
{
Console.WriteLine("[Bridge] vendor.sale handler threw: {0}", ex.Message);
}
}
}
}