fabric-network
Version:
SDK for writing node.js applications to interact with Hyperledger Fabric. This package encapsulates the APIs to connect to a Fabric network, submit transactions and perform queries against the ledger.
63 lines • 1.89 kB
JavaScript
;
/*
* Copyright 2019 IBM All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.CouchDBWalletStore = void 0;
const nano = require("nano");
const encoding = 'utf8';
class CouchDBWalletStore {
constructor(db) {
this.db = db;
}
static async newInstance(config, dbName) {
const client = nano(config);
try {
await client.db.get(dbName); // Throws if database does not exist
}
catch (error) {
await client.db.create(dbName);
}
const db = client.use(dbName);
return new CouchDBWalletStore(db);
}
async remove(label) {
const document = await this.getDocument(label);
if (document) {
await this.db.destroy(document._id, document._rev);
}
}
async get(label) {
const document = await this.getDocument(label);
return document ? Buffer.from(document.data, encoding) : undefined;
}
async list() {
const response = await this.db.list();
return response.rows.map((row) => row.id);
}
async put(label, data) {
const newDocument = {
_id: label,
data: data.toString(encoding),
};
// Overwrite any existing document revision instead of creating a new revision
const existingDocument = await this.getDocument(label);
if (existingDocument) {
newDocument._rev = existingDocument._rev;
}
await this.db.insert(newDocument);
}
async getDocument(label) {
try {
return await this.db.get(label);
}
catch (error) {
// TODO: Log error
}
return undefined;
}
}
exports.CouchDBWalletStore = CouchDBWalletStore;
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