feat: configurable debt policy

Author: doomsower

package.json

@@ -21,7 +21,7 @@
     "pino-pretty": "^13.1.3"
   },
   "devDependencies": {
-    "@aws-sdk/client-s3": "^3.956.0",
+    "@aws-sdk/client-s3": "^3.957.0",
     "@biomejs/biome": "^2.3.10",
     "@commander-js/extra-typings": "^14.0.0",
     "@commitlint/cli": "^20.2.0",

src/config/full-liquidator.ts

@@ -12,6 +12,20 @@ export const FullLiquidatorSchema = z.object({
     description: "Liquidator mode (full/partial/batch/deleverage)",
     env: "LIQUIDATION_MODE",
   }),
+  /**
+   * Debt policy
+   * full - liquidate fully
+   * debt-only - try to liquidate only debt
+   * debt-expired - try to liquidate only debt for expired accounts
+   */
+  debtPolicy: z
+    .enum(["full", "debt-only", "debt-expired"])
+    .default("full")
+    .register(zommandRegistry, {
+      flags: "--debt-policy <policy>",
+      description: "Liquidate fully/debt only/debt only for expired accounts",
+      env: "DEBT_POLICY",
+    }),
   /**
    * Whether we should apply loss policy on full liquidation of accounts with bad debt
    */

src/services/liquidate/LiquidationStrategyFull.ts

@@ -169,6 +169,9 @@ export default class LiquidationStrategyFull
       const isV310 = this.checkAccountVersion(ca, VERSION_RANGE_310);
       const ignoreReservePrices = !this.config.updateReservePrices && isV310;
       const cm = this.sdk.marketRegister.findCreditManager(ca.creditManager);
+      const debtOnly =
+        this.config.debtPolicy === "debt-only" ||
+        (this.config.debtPolicy === "debt-expired" && cm.isExpired);
       const { tx, routerCloseResult, calls } =
         await this.creditAccountService.fullyLiquidate({
           account: ca,
@@ -177,8 +180,7 @@ export default class LiquidationStrategyFull
           keepAssets: this.config.keepAssets,
           ignoreReservePrices,
           applyLossPolicy: this.#applyLossPolicy,
-          // TODO: try to liquidate with debt only, then normally as a fallback
-          debtOnly: cm.isExpired,
+          debtOnly,
         });
       return { ...routerCloseResult, calls, rawTx: tx };
     } catch (e) {