@substrate/api-sidecar
Version:
REST service that makes it easy to interact with blockchain nodes built using Substrate's FRAME framework.
77 lines • 3.56 kB
JavaScript
;
// Copyright 2017-2025 Parity Technologies (UK) Ltd.
// This file is part of Substrate API Sidecar.
//
// Substrate API Sidecar is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const services_1 = require("../../services");
const AbstractController_1 = __importDefault(require("../AbstractController"));
/**
* POST a serialized transaction and receive a fee estimate.
*
* Post info:
* - `data`: Expects a hex-encoded transaction, e.g. '{"tx": "0x..."}'.
* - `headers`: Expects 'Content-Type: application/json'.
*
* Returns:
* - Success:
* - `weight`: Extrinsic weight.
* - `class`: Extrinsic class, one of 'Normal', 'Operational', or 'Mandatory'.
* - `partialFee`: _Expected_ inclusion fee for the transaction. Note that the fee rate changes
* up to 30% in a 24 hour period and this will not be the exact fee.
* - Failure:
* - `error`: Error description.
* - `extrinsic`: The extrinsic and reference block hash.
* - `cause`: Error message from the client.
*
* Note: `partialFee` does not include any tips that you may add to increase a transaction's
* priority. See the reference on `compute_fee`.
*
* Substrate Reference:
* - `RuntimeDispatchInfo`: https://crates.parity.io/pallet_transaction_payment_rpc_runtime_api/struct.RuntimeDispatchInfo.html
* - `query_info`: https://crates.parity.io/pallet_transaction_payment/struct.Module.html#method.query_info
* - `compute_fee`: https://crates.parity.io/pallet_transaction_payment/struct.Module.html#method.compute_fee
*/
class TransactionFeeEstimateController extends AbstractController_1.default {
constructor(api) {
super(api, '/transaction/fee-estimate', new services_1.TransactionFeeEstimateService(api));
/**
* Submit a serialized transaction in order to receive an estimate for its
* partial fees.
*
* @param req Sidecar TxRequest
* @param res Express Response
*/
this.txFeeEstimate = async ({ body: { tx } }, res) => {
if (!tx) {
throw {
error: 'Missing field `tx` on request body.',
};
}
const hash = await this.api.rpc.chain.getFinalizedHead();
TransactionFeeEstimateController.sanitizedSend(res, await this.service.fetchTransactionFeeEstimate(this.api, hash, tx));
};
this.initRoutes();
}
initRoutes() {
this.router.post(this.path, TransactionFeeEstimateController.catchWrap(this.txFeeEstimate));
}
}
TransactionFeeEstimateController.controllerName = 'TransactionFeeEstimate';
TransactionFeeEstimateController.requiredPallets = [];
exports.default = TransactionFeeEstimateController;
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