@substrate/api-sidecar
Version:
REST service that makes it easy to interact with blockchain nodes built using Substrate's FRAME framework.
68 lines • 2.67 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/>.
Object.defineProperty(exports, "__esModule", { value: true });
exports.RuntimeMetadataService = void 0;
const types_1 = require("@polkadot/types");
const http_errors_1 = require("http-errors");
const AbstractService_1 = require("../AbstractService");
class RuntimeMetadataService extends AbstractService_1.AbstractService {
/**
* Fetch `Metadata` in decoded JSON form.
*
* @param hash `BlockHash` to make call at
*/
async fetchMetadata(hash) {
const { api } = this;
const metadata = await api.rpc.state.getMetadata(hash);
return metadata;
}
/**
* Fetch the requested version of `Metadata` in decoded JSON form.
*
* @param hash `BlockHash` to make call at
*/
async fetchMetadataVersioned(apiAt, metadataVersion) {
let metadata;
let metadataVersioned;
try {
metadata = await apiAt.call.metadata.metadataAtVersion(metadataVersion);
if (metadata) {
metadataVersioned = new types_1.Metadata(apiAt.registry, metadata.unwrap());
}
else {
throw new Error(`Metadata for version ${metadataVersion} is not available.`);
}
}
catch {
throw new http_errors_1.InternalServerError(`An error occured while attempting to fetch ${metadataVersion.toString()} metadata.`);
}
return metadataVersioned;
}
/**
* Fetch the available `Metadata` versions.
*
* @param hash `BlockHash` to make call at
*/
async fetchMetadataVersions(hash) {
const { api } = this;
const apiAt = await api.at(hash);
const availableVersions = (await apiAt.call.metadata.metadataVersions()).toHuman();
return availableVersions;
}
}
exports.RuntimeMetadataService = RuntimeMetadataService;
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