eamutils
Version:
Some reusable functions in some projects
63 lines (62 loc) • 3.12 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getPrice = exports.getPriceUsingPath = exports.getContract = void 0;
const ABIS = require("./abis");
const { address } = require('./index');
const { getRouterFromProvider } = require('./contract');
const { IProvider } = require('./provider');
const { ethers } = require('ethers');
/*
* Get token contract given a provider and address
*/
const getContract = (provider, addr) => {
const rpc = new ethers.providers.JsonRpcProvider(provider.rpcs[0]);
const contract = new ethers.Contract(addr, ABIS.getCommonTokenABI(), rpc);
return contract;
};
exports.getContract = getContract;
/*
* Get price of a token by using a path
*/
const getPriceUsingPath = (prov, path, amount = 1) => __awaiter(void 0, void 0, void 0, function* () {
const router = getRouterFromProvider(prov);
const baseToken = (0, exports.getContract)(prov, path[0]);
const baseDecimals = yield baseToken.decimals();
const units = ethers.utils.parseUnits(amount.toString(), baseDecimals);
const quoteToken = (0, exports.getContract)(prov, path[path.length - 1]);
const quoteDecimals = yield quoteToken.decimals();
try {
// Get amounts out using base pair: weth.address
let amountOut = yield router.getAmountsOut(units, path);
amountOut = ethers.utils.formatUnits(amountOut[amountOut.length - 1], quoteDecimals);
return amountOut;
}
catch (err) {
throw new Error(`Error getting price of token using path: ${err.message}`);
}
});
exports.getPriceUsingPath = getPriceUsingPath;
/*
* Get token price given both addresses
* @param fromAddress The address you want to convert from. Let's say BNB
* @param toAddress The address you want to convert to. Let's say some token from Binance Smart Chain or USDT
* @returns The price of the token (already formated to units)
*/
const getPrice = (prov, fromAddress, toAddress, amount = 1) => __awaiter(void 0, void 0, void 0, function* () {
var _a, _b;
let path = [address(fromAddress), address(toAddress)];
if (path.indexOf(address((_a = prov.weth) === null || _a === void 0 ? void 0 : _a.address)) === -1) {
path = [address(fromAddress), (_b = prov.weth) === null || _b === void 0 ? void 0 : _b.address, address(toAddress)];
}
return (0, exports.getPriceUsingPath)(prov, path, amount);
});
exports.getPrice = getPrice;