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TransactionFeeEstimateService.ts
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TransactionFeeEstimateService.ts
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// Copyright 2017-2022 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/>.
import {
BlockHash,
RuntimeDispatchInfo,
RuntimeDispatchInfoV1,
} from '@polkadot/types/interfaces';
import { AbstractService } from '../AbstractService';
import { extractCauseAndStack } from './extractCauseAndStack';
export class TransactionFeeEstimateService extends AbstractService {
/**
* Fetch estimated fee information for a SCALE-encoded extrinsic at a given
* block.
*
* @param hash `BlockHash` to make call at
* @param extrinsic scale encoded extrinsic to get a fee estimate for
*/
async fetchTransactionFeeEstimate(
hash: BlockHash,
transaction: string
): Promise<RuntimeDispatchInfo | RuntimeDispatchInfoV1> {
const { api } = this;
const apiAt = await api.at(hash);
try {
if (apiAt.call.transactionPaymentApi.queryInfo) {
const ext = api.registry.createType('Extrinsic', transaction);
const u8a = ext.toU8a();
return await apiAt.call.transactionPaymentApi.queryInfo(
ext,
u8a.length
);
} else {
return await api.rpc.payment.queryInfo(transaction, hash);
}
} catch (err) {
const { cause, stack } = extractCauseAndStack(err);
throw {
at: {