diff --git a/src/game/smelting/service.ts b/src/game/smelting/service.ts
new file mode 100644
index 0000000..caac063
--- /dev/null
+++ b/src/game/smelting/service.ts
@@ -0,0 +1,73 @@
+import { prisma } from '../../core/database/prisma';
+import type { Prisma } from '@prisma/client';
+import { findItemByKey, addItemByKey } from '../economy/service';
+
+export type SmeltInput = { itemKey: string; qty: number };
+
+export async function createSmeltJob(userId: string, guildId: string, inputs: SmeltInput[], outputItemKey: string, outputQty: number, smeltSeconds: number) {
+  if (!inputs.length) throw new Error('No hay insumos');
+  if (outputQty <= 0) throw new Error('Cantidad inválida');
+  const readyAt = new Date(Date.now() + Math.max(1, smeltSeconds) * 1000);
+
+  // Validar output item id
+  const outItem = await findItemByKey(guildId, outputItemKey);
+  if (!outItem) throw new Error('Output item no encontrado');
+
+  // Validar y descontar inputs
+  // Nota: para simplificar, chequeo y descuento debería ser transaccional; usamos una transacción
+  await prisma.$transaction(async (tx) => {
+    // Chequeo
+    for (const i of inputs) {
+      const it = await tx.economyItem.findFirst({ where: { key: i.itemKey, OR: [{ guildId }, { guildId: null }] }, orderBy: [{ guildId: 'desc' }] });
+      if (!it) throw new Error(`Input no encontrado: ${i.itemKey}`);
+      const inv = await tx.inventoryEntry.findUnique({ where: { userId_guildId_itemId: { userId, guildId, itemId: it.id } } });
+      if ((inv?.quantity ?? 0) < i.qty) throw new Error(`Faltan insumos: ${i.itemKey}`);
+    }
+    // Descuento
+    for (const i of inputs) {
+      const it = await tx.economyItem.findFirst({ where: { key: i.itemKey, OR: [{ guildId }, { guildId: null }] }, orderBy: [{ guildId: 'desc' }] });
+      if (!it) continue;
+      await tx.inventoryEntry.update({ where: { userId_guildId_itemId: { userId, guildId, itemId: it.id } }, data: { quantity: { decrement: i.qty } } });
+    }
+    // Crear job
+    await tx.smeltJob.create({
+      data: {
+        userId,
+        guildId,
+        inputs: { items: inputs } as unknown as Prisma.InputJsonValue,
+        outputItemId: outItem.id,
+        outputQty,
+        readyAt,
+        status: 'pending',
+      },
+    });
+  });
+
+  return { readyAt } as const;
+}
+
+export async function claimSmeltJob(userId: string, guildId: string, jobId: string) {
+  const job = await prisma.smeltJob.findUnique({ where: { id: jobId } });
+  if (!job || job.userId !== userId || job.guildId !== guildId) throw new Error('Job inválido');
+  if (job.status !== 'pending' && job.status !== 'ready') throw new Error('Estado inválido');
+  if (job.readyAt > new Date()) throw new Error('Aún no está listo');
+
+  // Otorgar outputs y marcar claimed
+  await prisma.$transaction(async (tx) => {
+    await tx.smeltJob.update({ where: { id: job.id }, data: { status: 'claimed' } });
+    const outItem = await tx.economyItem.findUnique({ where: { id: job.outputItemId } });
+    if (outItem) {
+      // usamos servicio economy por fuera de la transacción (para evitar nested client); hacemos simple aquí
+      // añadir con tx: replicamos addItem
+      const inv = await tx.inventoryEntry.findUnique({ where: { userId_guildId_itemId: { userId, guildId, itemId: outItem.id } } });
+      if (inv) {
+        await tx.inventoryEntry.update({ where: { userId_guildId_itemId: { userId, guildId, itemId: outItem.id } }, data: { quantity: { increment: job.outputQty } } });
+      } else {
+        await tx.inventoryEntry.create({ data: { userId, guildId, itemId: outItem.id, quantity: job.outputQty } });
+      }
+    }
+  });
+
+  return { ok: true } as const;
+}
+