@hydro-protocol/hydro-client-js
Version:
Javascript SDK for the Hydro API
241 lines (240 loc) • 11.6 kB
JavaScript
"use strict";
var __assign = (this && this.__assign) || Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
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;
if (y = 0, t) op = [op[0] & 2, 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; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var bignumber_js_1 = __importDefault(require("bignumber.js"));
var web3_1 = __importDefault(require("web3"));
var erc20_json_1 = __importDefault(require("../abi/erc20.json"));
var weth_json_1 = __importDefault(require("../abi/weth.json"));
/**
* Handle building requests to the server, including authentication
* in the request header.
*/
var Web3Handler = /** @class */ (function () {
function Web3Handler(account, options) {
this.PROXY_ADDRESS = '0x74622073a4821dbfd046e9aa2ccf691341a076e1';
this.account = account;
if (options && options.web3Url) {
this.web3 = new web3_1.default(new web3_1.default.providers.HttpProvider(options.web3Url));
}
}
Web3Handler.prototype.getBalance = function (address) {
return __awaiter(this, void 0, void 0, function () {
var web3, balance;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
web3 = this.getWeb3();
if (!address) return [3 /*break*/, 2];
return [4 /*yield*/, this.getERC20Contract(address)
.methods.balanceOf(this.account.address)
.call()];
case 1:
balance = _a.sent();
return [3 /*break*/, 4];
case 2: return [4 /*yield*/, web3.eth.getBalance(this.account.address)];
case 3:
balance = _a.sent();
_a.label = 4;
case 4: return [2 /*return*/, web3.utils.fromWei(new bignumber_js_1.default(balance).toString()).toString()];
}
});
});
};
Web3Handler.prototype.wrapEth = function (wethAddress, amount, wait) {
return __awaiter(this, void 0, void 0, function () {
var contract, data, web3;
return __generator(this, function (_a) {
contract = this.getWethContract(wethAddress);
data = contract.methods.deposit().encodeABI();
web3 = this.getWeb3();
return [2 /*return*/, this.signAndSendTransaction({
data: data,
to: wethAddress,
value: web3.utils.toHex(web3.utils.toWei(amount)),
}, wait)];
});
});
};
Web3Handler.prototype.unwrapEth = function (wethAddress, amount, wait) {
return __awaiter(this, void 0, void 0, function () {
var contract, web3, data;
return __generator(this, function (_a) {
contract = this.getWethContract(wethAddress);
web3 = this.getWeb3();
data = contract.methods.withdraw(web3.utils.toWei(amount)).encodeABI();
return [2 /*return*/, this.signAndSendTransaction({
data: data,
to: wethAddress,
value: web3.utils.toHex(0),
}, wait)];
});
});
};
Web3Handler.prototype.getAllowance = function (address) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.getERC20Contract(address)
.methods.allowance(this.account.address, this.PROXY_ADDRESS)
.call()];
});
});
};
Web3Handler.prototype.enableToken = function (address, wait) {
return __awaiter(this, void 0, void 0, function () {
var contract, data;
return __generator(this, function (_a) {
contract = this.getERC20Contract(address);
data = contract.methods
.approve(this.PROXY_ADDRESS, new bignumber_js_1.default(2)
.pow(256)
.minus(1)
.toFixed())
.encodeABI();
return [2 /*return*/, this.signAndSendTransaction({
data: data,
to: address,
value: 0,
}, wait)];
});
});
};
Web3Handler.prototype.disableToken = function (address, wait) {
return __awaiter(this, void 0, void 0, function () {
var contract, data;
return __generator(this, function (_a) {
contract = this.getERC20Contract(address);
data = contract.methods.approve(this.PROXY_ADDRESS, 0).encodeABI();
return [2 /*return*/, this.signAndSendTransaction({
data: data,
to: address,
value: 0,
}, wait)];
});
});
};
Web3Handler.prototype.getERC20Contract = function (address) {
var web3 = this.getWeb3();
// @ts-ignore
return new web3.eth.Contract(erc20_json_1.default, address);
};
Web3Handler.prototype.getWethContract = function (address) {
var web3 = this.getWeb3();
// @ts-ignore
return new web3.eth.Contract(weth_json_1.default, address);
};
Web3Handler.prototype.getWeb3 = function () {
if (!this.web3) {
throw new Error('No web3 url provided, cannot use mainnet functions!');
}
return this.web3;
};
Web3Handler.prototype.signAndSendTransaction = function (tx, wait) {
return __awaiter(this, void 0, void 0, function () {
var web3, sig;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
web3 = this.getWeb3();
return [4 /*yield*/, this.constructTransaction(tx)];
case 1:
tx = _a.sent();
return [4 /*yield*/, this.account.signTransaction(tx)];
case 2:
sig = _a.sent();
return [2 /*return*/, new Promise(function (res, rej) { return __awaiter(_this, void 0, void 0, function () {
var p;
return __generator(this, function (_a) {
p = web3.eth
.sendSignedTransaction(sig)
.once('transactionHash', function (hash) {
if (!wait) {
res(hash);
}
})
.once('confirmation', function (_, receipt) {
if (wait) {
res(receipt.transactionHash);
}
})
.on('error', function (error) { return rej(error.message); });
return [2 /*return*/];
});
}); })];
}
});
});
};
Web3Handler.prototype.constructTransaction = function (tx) {
return __awaiter(this, void 0, void 0, function () {
var web3, from, _a, chainId, gasPrice, nonce, gas;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
web3 = this.getWeb3();
from = this.account.address;
return [4 /*yield*/, Promise.all([
web3.eth.net.getId(),
web3.eth.getGasPrice(),
web3.eth.getTransactionCount(from),
])];
case 1:
_a = _b.sent(), chainId = _a[0], gasPrice = _a[1], nonce = _a[2];
tx = __assign({}, tx, { chainId: chainId,
from: from, gas: 100000000, gasPrice: web3.utils.toHex(gasPrice), nonce: nonce });
return [4 /*yield*/, web3.eth.estimateGas(tx)];
case 2:
gas = _b.sent();
return [2 /*return*/, __assign({}, tx, { gas: web3.utils.toHex(gas) })];
}
});
});
};
return Web3Handler;
}());
exports.Web3Handler = Web3Handler;