161 lines
8.2 KiB
JavaScript
161 lines
8.2 KiB
JavaScript
"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (g && (g = 0, op[0] && (_ = 0)), _) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
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if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
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if (ar || !(i in from)) {
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if (!ar) ar = Array.prototype.slice.call(from, 0, i);
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ar[i] = from[i];
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}
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}
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return to.concat(ar || Array.prototype.slice.call(from));
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.TokenPriceOracle = void 0;
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var factories_1 = require("./contracts/factories");
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var ethers_1 = require("ethers");
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var utils_1 = require("ethers/lib/utils");
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var tornado_config_1 = require("@tornado/tornado-config");
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var config_1 = require("./config");
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/**
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* Filter non-native tokens from Tornado instances config
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* @param instances Tornado instances from torn-token config ('@tornado/tornado-config' library)
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* @returns Array of non-native tokens
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*/
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function filterTokensFromTornadoInstances(instances) {
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var ethInstances = Object.values(instances[config_1.ChainId.MAINNET]);
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return ethInstances.filter(function (tokenInstance) { return !!tokenInstance.tokenAddress; });
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}
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var tornToken = {
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tokenAddress: '0x77777FeDdddFfC19Ff86DB637967013e6C6A116C',
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symbol: 'torn',
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decimals: 18,
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};
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var tornadoTokens = __spreadArray([tornToken], filterTokensFromTornadoInstances(tornado_config_1.instances), true);
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var defaultTornadoTokenPrices = {
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torn: '1689423546359032',
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dai: '598416104472725',
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cdai: '13384388487019',
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usdc: '599013776676721',
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usdt: '599323410893614',
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wbtc: '15659889148334216720',
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};
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var TokenPriceOracle = /** @class */ (function () {
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/**
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* Constructs TokenPriceOracle class instance
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* @param {string} rpcUrl http RPC (Ethereum Mainnet) url to fetch token prices from contract
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* @param {Token[]} [tokens] Array of tokens
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* @param {TokenPrices} [defaultTokenPrices] Default token prices, fallback if nothing loaded from contract
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*/
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function TokenPriceOracle(rpcUrl, tokens, defaultTokenPrices, chainId) {
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if (tokens === void 0) { tokens = tornadoTokens; }
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if (defaultTokenPrices === void 0) { defaultTokenPrices = defaultTornadoTokenPrices; }
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this.tokens = tokens;
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this.defaultTokenPrices = defaultTokenPrices;
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this.provider = new ethers_1.ethers.providers.JsonRpcProvider(rpcUrl);
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this.oracle = (0, factories_1.getOffchainOracleContract)(this.provider, chainId);
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this.multiCall = (0, factories_1.getMultiCallContract)(this.provider);
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}
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Object.defineProperty(TokenPriceOracle.prototype, "defaultPrices", {
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// Instant return default token prices
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get: function () {
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return this.defaultTokenPrices;
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},
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enumerable: false,
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configurable: true
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});
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/**
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* Prepare data for MultiCall contract
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* @param {Token[]} [tokens] Tokens array
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* @returns Valid structure to provide to MultiCall contract
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*/
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TokenPriceOracle.prototype.prepareCallData = function (tokens) {
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var _this = this;
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if (tokens === void 0) { tokens = this.tokens; }
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return tokens.map(function (token) { return ({
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target: _this.oracle.address,
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allowFailure: true,
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callData: _this.oracle.interface.encodeFunctionData('getRateToEth', [token.tokenAddress, true]),
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}); });
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};
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/**
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* Fetch actual tokens price rate to ETH from offchain oracles
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* @param {Token[]} [tokens] Token array
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* @returns {TokenPrices} Object with token price rate to ETH in WEI
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*/
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TokenPriceOracle.prototype.fetchPrices = function (tokens) {
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if (tokens === void 0) { tokens = this.tokens; }
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return __awaiter(this, void 0, void 0, function () {
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var callData, results, prices, i, tokenSymbol, decodedRate, tokenDecimals, ethDecimals, price, e_1;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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_a.trys.push([0, 2, , 3]);
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if (!(tokens === null || tokens === void 0 ? void 0 : tokens.length))
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return [2 /*return*/, {}];
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callData = this.prepareCallData(tokens);
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return [4 /*yield*/, this.multiCall.callStatic.aggregate3(callData)];
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case 1:
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results = _a.sent();
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prices = {};
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for (i = 0; i < results.length; i++) {
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tokenSymbol = tokens[i].symbol.toLowerCase();
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if (!results[i].success) {
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if (this.defaultTokenPrices[tokenSymbol])
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prices[tokenSymbol] = this.defaultTokenPrices[tokenSymbol];
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continue;
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}
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decodedRate = utils_1.defaultAbiCoder.decode(['uint256'], results[i].returnData).toString();
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tokenDecimals = ethers_1.BigNumber.from(10).pow(tokens[i].decimals);
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ethDecimals = ethers_1.BigNumber.from(10).pow(18);
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price = ethers_1.BigNumber.from(decodedRate).mul(tokenDecimals).div(ethDecimals);
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prices[tokenSymbol] = price.toString();
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}
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return [2 /*return*/, prices];
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case 2:
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e_1 = _a.sent();
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console.error('Cannot get token prices, return default: ' + e_1);
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return [2 /*return*/, this.defaultTokenPrices];
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case 3: return [2 /*return*/];
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}
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});
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});
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};
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return TokenPriceOracle;
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}());
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exports.TokenPriceOracle = TokenPriceOracle;
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//# sourceMappingURL=tokenPriceOracle.js.map
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