@vechain.energy/gas
Version:
calculate estimated gas usage for transactions
42 lines (41 loc) • 2.26 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());
});
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = vmPrice;
const bent_1 = __importDefault(require("bent"));
const constants_1 = require("./constants");
function vmPrice(clauses, nodeOrConnex, _caller) {
return __awaiter(this, void 0, void 0, function* () {
// set default caller for contract creation, because address(0) will revert and return too little gas
const caller = !_caller && clauses.some(({ to }) => !to) ? '0x0000000000000000000000000000000000000001' : _caller;
// get base price via HTTP request
if (typeof nodeOrConnex === "string") {
const postNode = (0, bent_1.default)(nodeOrConnex, 'POST', 'json', 200);
const response = yield postNode('/accounts/*', { clauses, caller });
if (!Array.isArray(response)) {
return 0;
}
const gas = response.reduce((gas, output) => gas + output.gasUsed, constants_1.VM_GAS);
return gas === constants_1.VM_GAS ? 0 : gas;
}
// alternatively, use connex
const explainer = nodeOrConnex.thor.explain(clauses);
if (caller !== undefined) {
explainer.caller(caller);
}
const outputs = yield explainer.execute();
const gas = outputs.reduce((gas, output) => gas + output.gasUsed, constants_1.VM_GAS);
return gas === constants_1.VM_GAS ? 0 : gas;
});
}