tokenlon-sdk/lib/utils/gasPriceAdaptor.js

imToken Tokenlon API for node

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
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    function verb(n) { return function (v) { return step([n, v]); }; }
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            if (y = 0, t) op = [0, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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                    _.trys.pop(); continue;
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        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var _this = this;
Object.defineProperty(exports, "__esModule", { value: true });
var axios_1 = require("axios");
var constants_1 = require("../constants");
var helper_1 = require("./helper");
var getGasPriceByAdaptorHelper = function (adaptor) { return __awaiter(_this, void 0, void 0, function () {
    return __generator(this, function (_a) {
        return [2 /*return*/, axios_1.default(constants_1.ETH_GAS_STATION_URL).then(function (res) {
                return res.data[adaptor] * 0.1;
            }).catch(function (e) {
                throw helper_1.newError(constants_1.ETH_GAS_STATION_URL + " server error " + (e && e.message));
            })];
    });
}); };
var stack = {};
exports.getGasPriceByAdaptorAsync = function (adaptor) { return __awaiter(_this, void 0, void 0, function () {
    var gasPrice, gasPriceInGwei;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                if (!(stack[adaptor] && stack[adaptor].timestamp + 300 > helper_1.getTimestamp())) return [3 /*break*/, 1];
                return [2 /*return*/, stack[adaptor].gasPrice];
            case 1:
                if (!(stack[adaptor] && stack[adaptor].requesting)) return [3 /*break*/, 5];
                if (!(stack[adaptor].tried > 15)) return [3 /*break*/, 2];
                helper_1.newError(constants_1.ETH_GAS_STATION_URL + " server request timeout");
                return [3 /*break*/, 4];
            case 2: return [4 /*yield*/, new Promise(function (resolve) {
                    setTimeout(resolve, 1000);
                })];
            case 3:
                _a.sent();
                stack[adaptor].tried = stack[adaptor].tried ? stack[adaptor].tried + 1 : 1;
                return [2 /*return*/, exports.getGasPriceByAdaptorAsync(adaptor)];
            case 4: return [3 /*break*/, 7];
            case 5:
                stack[adaptor] = { requesting: true };
                return [4 /*yield*/, getGasPriceByAdaptorHelper(adaptor)];
            case 6:
                gasPrice = _a.sent();
                gasPriceInGwei = gasPrice * Math.pow(10, 9) // gwei process
                ;
                stack[adaptor] = {
                    gasPrice: gasPriceInGwei,
                    timestamp: helper_1.getTimestamp(),
                    requesting: false,
                };
                return [2 /*return*/, gasPriceInGwei];
            case 7: return [2 /*return*/];
        }
    });
}); };
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