feat: add tezos's cdp kolibri

DefiLlama · Jan 24, 2023 · 0b66d1d · 0b66d1d
1 parent 5b9d9f1
commit 0b66d1d
Showing 3 changed files with 121 additions and 0 deletions.
diff --git a/liquidations/kolibri/index.ts b/liquidations/kolibri/index.ts
@@ -0,0 +1,24 @@
+import { CONTRACTS, HarbingerClient } from "@hover-labs/kolibri-js";
+import { OVEN_DATA_BASE_URL, TEZOS_RPC, getOvens, mapOven } from "./utils";
+
+import { Liq } from "../utils/types";
+
+const harbingerClient = new HarbingerClient(
+  TEZOS_RPC,
+  CONTRACTS.MAIN.HARBINGER_NORMALIZER
+);
+
+const positions = async (): Promise<Liq[]> => {
+  const [ovens, { price }] = await Promise.all([
+    getOvens(OVEN_DATA_BASE_URL),
+    harbingerClient.getPriceData(),
+  ]);
+
+  return Promise.all(ovens.map((oven) => mapOven(oven, price)));
+};
+
+module.exports = {
+  tezos: {
+    liquidations: positions(),
+  },
+};
diff --git a/liquidations/kolibri/utils.ts b/liquidations/kolibri/utils.ts
@@ -0,0 +1,96 @@
+import BigNumber from "bignumber.js";
+import { ConversionUtils } from "@hover-labs/kolibri-js";
+import { Liq } from "../utils/types";
+import axios from "axios";
+
+/*
+Credits goes to: https://github.com/Hover-Labs/kolibri-js/blob/master/src/oven-client.ts
+As the vast majority of helpers from here were either took, modified or inspired from kolibri-js module
+*/
+
+export const TEZOS_RPC = process.env.TEZOS_RPC || "https://rpc.tzkt.io/mainnet";
+export const OVEN_DATA_BASE_URL =
+  "https://kolibri-data.s3.amazonaws.com/mainnet/oven-data.json";
+
+const MUTEZ_DIGITS = 6;
+const SHARD_DIGITS = 18;
+
+export const MUTEZ_TO_SHARD = new BigNumber(
+  Math.pow(10, SHARD_DIGITS - MUTEZ_DIGITS)
+);
+
+export const SHARD_PRECISION = new BigNumber(Math.pow(10, SHARD_DIGITS));
+
+export interface KolibriOven {
+  ovenAddress: string;
+  ovenOwner: string;
+  baker: string;
+  balance: string;
+  borrowedTokens: string;
+  stabilityFees: string;
+  isLiquidated: boolean;
+  outstandingTokens: string;
+}
+
+const liquidatablePrice = (rate: BigNumber, price: BigNumber) => {
+  const t = 1 - rate.toNumber();
+  const a = price.dividedBy(Math.pow(10, 6));
+  return a.minus(a.times(t));
+};
+
+export const customGetCollateralUtilization = (
+  price: BigNumber,
+  balance: BigNumber,
+  outstandingTokens: BigNumber
+) => {
+  const priceShard = price.multipliedBy(MUTEZ_TO_SHARD);
+  const collateralValue = balance
+    .multipliedBy(MUTEZ_TO_SHARD)
+    .multipliedBy(priceShard)
+    .dividedBy(SHARD_PRECISION);
+
+  return new BigNumber(
+    outstandingTokens
+      .times(Math.pow(10, SHARD_DIGITS))
+      .dividedBy(collateralValue)
+      .toFixed(0)
+  );
+};
+
+export const getOvens = async (ovenBaseUrl) => {
+  const {
+    data: { allOvenData },
+  } = await axios.get(ovenBaseUrl);
+
+  //remvoving liquidated + empty ovens
+  return (allOvenData as KolibriOven[]).filter(
+    (oven) => oven.isLiquidated === false && parseInt(oven.balance, 10) > 0
+  );
+};
+
+export const mapOven = async (
+  { balance, ovenAddress, ovenOwner, outstandingTokens }: KolibriOven,
+  price: BigNumber
+) => {
+  const ovenBalance = new BigNumber(balance);
+  const collateralUtilization = customGetCollateralUtilization(
+    price,
+    ovenBalance,
+    new BigNumber(outstandingTokens)
+  );
+  const rate = collateralUtilization.multipliedBy(2);
+  const liquidatablePriceValue = liquidatablePrice(rate, price);
+
+  return {
+    owner: ovenOwner,
+    liqPrice: parseFloat(
+      ConversionUtils.shardToHumanReadableNumber(liquidatablePriceValue)
+    ),
+    collateral: `tezos:${ovenAddress}`,
+    collateralAmount: ovenBalance.toString(),
+    extra: {
+      url: `https://tzkt.io/${ovenAddress}/operations/`,
+      owner: `https://tzkt.io/${ovenOwner}/operations/`,
+    },
+  } as Liq;
+};
diff --git a/package.json b/package.json
@@ -16,6 +16,7 @@
   "license": "ISC",
   "dependencies": {
     "@defillama/sdk": "latest",
+    "@hover-labs/kolibri-js": "^4.1.3",
     "@project-serum/anchor": "^0.25.0",
     "@solana/web3.js": "^1.36.0",
     "@solendprotocol/solend-sdk": "^0.6.2",