@melonproject/protocol
Version:
Technology Regulated and Operated Investment Funds
53 lines (52 loc) • 3.04 kB
JavaScript
;
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 __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
result["default"] = mod;
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const R = __importStar(require("ramda"));
const token_math_1 = require("@melonproject/token-math");
const constructEnvironment_1 = require("../environment/constructEnvironment");
const ensure_1 = require("../guards/ensure");
exports.prepareTransaction = (environment, transaction, optionsOrCallback) => __awaiter(this, void 0, void 0, function* () {
const encoded = transaction.encodeABI();
const options = Object.assign({ amguPayable: false, from: environment.wallet.address.toString() }, (typeof optionsOrCallback === 'function'
? optionsOrCallback(environment)
: optionsOrCallback));
const maxGasPrice = token_math_1.multiply(token_math_1.toBI(constructEnvironment_1.defaultOptions.gasLimit), token_math_1.toBI(constructEnvironment_1.defaultOptions.gasPrice));
const balance = yield environment.eth.getBalance(options.from);
const maxAmguInEth = token_math_1.subtract(token_math_1.toBI(balance), maxGasPrice);
// We don't know the amgu price at this stage yet, so we just send all
// available ETH for the gasEstimation. This should throw if amgu price
// in ETH is bigger than the available balance.
const amguOptions = options.amguPayable
? Object.assign({ value: `${maxAmguInEth}` }, options) : options;
ensure_1.ensure(!(options.skipGasEstimation && !options.gas), 'Cannot skip gasEstimation if no options.gas is provided');
try {
const gasEstimation = options.skipGasEstimation
? 0
: yield transaction.estimateGas(Object.assign({}, R.omit(['amguPayable', 'incentive'], amguOptions)));
transaction.gasEstimation = Math.ceil(Math.min(gasEstimation * 1.1, parseInt(environment.options.gasLimit, 10)));
}
catch (e) {
throw new Error(`Gas estimation (preflight) failed for ${transaction.name}(${transaction.arguments.map(JSON.stringify).join(', ')}): ${e.message}`);
}
const prepared = {
encoded,
gasEstimation: transaction.gasEstimation,
name: transaction.name,
transaction,
};
return prepared;
});