composer-wallet-mongodb v0.0.2

composer-wallet-mongodb

This is Hyperledger Composer Wallet implementation using MongoDB as a store.

Usage

The steps below assume that you have an application or playground, or rest server for Hyperledger Composer that wish to use. Also it assumes you are familar with NPM, and the card concept in the Composer

Step 1

Firstly, this module that provides the support to connect from Composer to the MongoDB needs to be installed. This is loaded using a node.js require statment, and the current preview will look for this in the global modules.

npm install -g composer-waller-mongodb

Step 2

Configuration needs to be passed to the client appliation using composer to use this new wallet.

There are two main ways this can be achieved. Via configuration file, or via environment variables.

File Assuming that you do not have the config directory already - this is using the standard node npm config module

• Create a directory config in the current working directory of the application
• Create a file default.json in this config directory
• Ensure that the contents of the file are

{
  "composer": {
    "wallet": {
      "type": "composer-wallet-mongodb",
      "desc": "Uses a local mongodb instance",
      "options": {
        // Mongodb URI
        "uri": "mongodb://localhost:27017/yourCollection",
        // Collection name for the wallet
        "collectionName": "myWallet",
        // Mongoose connection options
        "options": {

        }
      }
    }
  }
}

• type is the name of this module
• desc is some text for the humans
• options options for MongoDB connection

Environment Variable

As this is using the config module specifing the details on the command line via environment variables can be achieved by

export NODE_CONFIG='{
  "composer": {
    "wallet": {
      "type": "composer-wallet-mongodb",
      "desc": "Uses a local mongodb instance",
      "options": {
        "uri": "mongodb://localhost:27017/yourCollection",
        "collectionName": "myWallet",
        "options": {

        }
      }
    }
  }
}'

The any application (or command line, eg composer card list) that is in this shell will use the MongoDB wallets.