feat: classify Curve/Balancer fee burners and CoW AMM as named order types (COW-1006)

schema/tables.ts

@@ -11,6 +11,9 @@ export const orderTypeEnum = onchainEnum("order_type", [
   "CirclesBackingOrder",
   "SwapOrderHandler",
   "ERC4626CowSwapFeeBurner",
+  "CurveCowSwapBurner",
+  "BalancerCowSwapFeeBurner",
+  "CowAmmConstantProduct",
   "Unknown",
 ]);
 

src/application/handlers/blockHandler.ts

@@ -46,7 +46,7 @@ import { log } from "../helpers/logger";
 import { type OrderType } from "../../utils/order-types";
 type DiscreteStatus = (typeof discreteOrderStatusEnum.enumValues)[number];
 
-const NON_DETERMINISTIC_TYPES: readonly OrderType[] = ["PerpetualSwap", "GoodAfterTime", "TradeAboveThreshold", "Unknown"];
+const NON_DETERMINISTIC_TYPES: readonly OrderType[] = ["PerpetualSwap", "GoodAfterTime", "TradeAboveThreshold", "CurveCowSwapBurner", "BalancerCowSwapFeeBurner", "CowAmmConstantProduct", "Unknown"];
 const SINGLE_SHOT_NON_DETERMINISTIC: readonly OrderType[] = ["GoodAfterTime", "TradeAboveThreshold"];
 const BLOCK_NEVER = 2n ** 63n - 1n; // sentinel for epoch-scheduled generators (PollTryAtEpoch)
 const VALID_DISCRETE_STATUSES = new Set(["fulfilled", "unfilled", "expired", "cancelled"]);

src/utils/order-types.ts

@@ -21,6 +21,9 @@ export type OrderType =
   | "CirclesBackingOrder"
   | "SwapOrderHandler"
   | "ERC4626CowSwapFeeBurner"
+  | "CurveCowSwapBurner"
+  | "BalancerCowSwapFeeBurner"
+  | "CowAmmConstantProduct"
   | "Unknown";
 
 /**
@@ -43,12 +46,27 @@ export const HANDLER_ADDRESS_TO_TYPE: Record<string, OrderType> = {
 const MAINNET_ONLY_HANDLERS: Record<string, OrderType> = {
   "0xd506fe0b3ddf9e685c16e000514a835d3a511b26": "SwapOrderHandler",
   "0x816e90dc85bf016455017a76bc09cc0451eeb308": "ERC4626CowSwapFeeBurner",
+  // Curve Finance fee-burn handler: converts protocol fees → target token via CoW swap.
+  // Source: https://docs.curve.finance/fees/CowSwapBurner/ — Vyper 0.3.10, verified.
+  "0xc0fc3ddfec95ca45a0d2393f518d3ea1ccf44f8b": "CurveCowSwapBurner",
+  // Balancer v3 CowSwapFeeBurner: burns protocol fees via CoW swap.
+  // v2 (current): deployed via 20250530-v3-cow-swap-fee-burner-v2 task.
+  "0x9958317b80ee5f10457017d54c2484d722059157": "BalancerCowSwapFeeBurner",
+  // v1 (deprecated): deployed via 20250221-v3-cow-swap-fee-burner (now in deprecated/).
+  "0x0e800d8d2e8b4694610aedc385aa6d763492b106": "BalancerCowSwapFeeBurner",
 };
 
 const GNOSIS_ONLY_HANDLERS: Record<string, OrderType> = {
   "0x43866c5602b0e3b3272424396e88b849796dc608": "CirclesBackingOrder",
   "0x7a77934d32d78bfe8dc1e23415b5679960a1c610": "SwapOrderHandler",
   "0x5915dea04ce390f0f44ca0806f7c6dd99ce2f941": "ERC4626CowSwapFeeBurner",
+  // Balancer v3 CowSwapFeeBurner v2 on Gnosis.
+  // Deployed via 20250530-v3-cow-swap-fee-burner-v2 task.
+  "0x254f3a2974b97dc2e675f6115c845567c55f83b0": "BalancerCowSwapFeeBurner",
+  // CoW AMM ConstantProduct pool (verified). Each pool instance IS its own handler —
+  // the pool address equals the handler address. Factory: ConstantProductFactory.
+  // Source: https://github.com/cowprotocol/cow-amm
+  "0xb148f40fff05b5ce6b22752cf8e454b556f7a851": "CowAmmConstantProduct",
 };
 
 const HANDLER_MAP: Record<number, Record<string, OrderType>> = {
@@ -86,5 +104,8 @@ export const DETERMINISTIC_ORDER_TYPE: Record<OrderType, boolean> = {
   TradeAboveThreshold: false,
   SwapOrderHandler: false,
   ERC4626CowSwapFeeBurner: false,
+  CurveCowSwapBurner: false,
+  BalancerCowSwapFeeBurner: false,
+  CowAmmConstantProduct: false,
   Unknown: false,
 };

tests/utils/order-types.test.ts

@@ -25,6 +25,9 @@ describe("DETERMINISTIC_ORDER_TYPE", () => {
     expect(DETERMINISTIC_ORDER_TYPE["TradeAboveThreshold"]).toBe(false);
     expect(DETERMINISTIC_ORDER_TYPE["SwapOrderHandler"]).toBe(false);
     expect(DETERMINISTIC_ORDER_TYPE["ERC4626CowSwapFeeBurner"]).toBe(false);
+    expect(DETERMINISTIC_ORDER_TYPE["CurveCowSwapBurner"]).toBe(false);
+    expect(DETERMINISTIC_ORDER_TYPE["BalancerCowSwapFeeBurner"]).toBe(false);
+    expect(DETERMINISTIC_ORDER_TYPE["CowAmmConstantProduct"]).toBe(false);
     expect(DETERMINISTIC_ORDER_TYPE["Unknown"]).toBe(false);
   });
 });