add close trove strategy for Liquity

core/strategies/index.ts

@@ -1,11 +1,11 @@
-import AaveV2 from "./protocols/aave-v2"
-import Compound from "./protocols/compound"
-import Liquity from "./protocols/liquity"
+import AaveV2 from "./protocols/aave-v2";
+import Compound from "./protocols/compound";
+import Liquity from "./protocols/liquity";
 
 export const protocolStrategies = {
-    aaveV2 : AaveV2,
-    compound : Compound,
-    liquity : Liquity,
-}
+  aaveV2: AaveV2,
+  compound: Compound,
+  liquity: Liquity
+};
 
-export * from "./helpers"
+export * from "./helpers";

core/strategies/protocols/liquity/close-trove.ts

@@ -0,0 +1,59 @@
+import { defineStrategy, StrategyProtocol } from "../../helpers";
+
+export default defineStrategy({
+  protocol: StrategyProtocol.LIQUITY,
+  name: "Close Trove",
+  description:
+    "Close trove: Payback debt, withdraw Collateral & Liquidation Reserve.",
+  author: "Instadapp Team",
+
+  submitText: "Close Trove",
+
+  details: `<p class="text-center">This strategy executes:</p>
+  <ul>
+    <li>Close Trove</li>
+  </ul>`,
+
+  inputs: [],
+
+  validate: async ({
+    position,
+    positionExtra,
+    toBN,
+    getTokenByKey,
+    dsaBalances
+  }) => {
+    const troveOpened =
+      !toBN(position.collateral).isZero() && !toBN(position.debt).isZero();
+
+    if (!troveOpened) {
+      return "You should open new trove first";
+    }
+
+    const troveOverallDetails = positionExtra["troveOverallDetails"];
+
+    const netDebt = toBN(position.debt).minus(
+      troveOverallDetails.liquidationReserve
+    );
+
+    const debtToken = getTokenByKey("lusd");
+    const debtTokenBalance = dsaBalances[debtToken.address].balance;
+
+    if (toBN(position.debt).gt(debtTokenBalance)) {
+      const lackOfBalance = netDebt.minus(debtTokenBalance).toPrecision(6, 0);
+      return `You need ${lackOfBalance} ${debtToken.symbol} more to close your Trove.`;
+    }
+  },
+
+  spells: async () => {
+    const setId = 0;
+
+    return [
+      {
+        connector: "LIQUITY-A",
+        method: "close",
+        args: [setId]
+      }
+    ];
+  }
+});

core/strategies/protocols/liquity/index.ts

@@ -1,8 +1,10 @@
 import depositAndBorrow from "./deposit-and-borrow"
 import paybackAndWithdraw from "./payback-and-withdraw"
+import closeTrove from "./close-trove"
 
 export default [
     depositAndBorrow,
     paybackAndWithdraw,
+    closeTrove,
 ]