composer-wallet-ibmcos

This is Hyperledger Composer Wallet implementation using the IBM Cloud Object Storage as a store.

This uses the S3 API, so conversion to other Object Storage services should be feasible.

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

• Signup for a IBM Cloud account (the developer plan is free and includes object storage)
• Create a Cloud Object Store bucket. Would suggest to under the 'Select Service ID' automatically create a service
• Also if you want to use the AWS CLI to access the bucket specify the following in the Add Inline Configuration Parameters (Optional) field: {"HMAC":true}

You will need then to keep a copy of the Service Credentials. These are of the form

{
  "apikey": "0viPHOY7LbLNa9eLftrtHPpTjoGv6hbLD1QalRXikliJ",
  "cos_hmac_keys": {
      "access_key_id": "347aa3a4b34344f8bc7c7cccdf856e4c",
      "secret_access_key": "gvurfb82712ad14e7a7915h763a6i87155d30a1234364f61"
  },
  "endpoints": "https://cos-service.bluemix.net/endpoints",
  "iam_apikey_description": "Auto generated apikey during resource-key operation for Instance - crn:v1:bluemix:public:cloud-object-storage:global:a/3ag0e9402tyfd5d29761c3e97696b71n:d6f74k03-6k4f-4a82-b165-697354o63903::",
  "iam_apikey_name": "auto-generated-apikey-f9274b63-ef0b-4b4e-a00b-b3bf9023f9dd",
  "iam_role_crn": "crn:v1:bluemix:public:iam::::serviceRole:Manager",
  "iam_serviceid_crn": "crn:v1:bluemix:public:iam-identity::a/3ag0e9402tyfd5d29761c3e97696b71n::serviceid:ServiceId-540a4a41-7322-4fdd-a9e7-e0cb7ab760f9",
  "resource_instance_id": "crn:v1:bluemix:public:cloud-object-storage:global:a/3ag0e9402tyfd5d29761c3e97696b71n:d6f74k03-6k4f-4a82-b165-697354o63903::"
}

More information in the IBM Cloud Documentation

Step 2

Firstly, this module that provides the support to connect from Composer to the Object Storage 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 @ampretia/composer-waller-ibmcos

Step 3

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": {
    "cardstore": {
      "type": "@ampretia/composer-wallet-ibmcos",
      "desc": "Uses the IBM Cloud Object Store",
      "options": {
        "bucketName": "alpha-metal",
        "endpoint": "s3.eu-gb.objectstorage.softlayer.net",
        "apikey": "0viPHOY7LbLNa9eLftrtHPpTjoGv6hbLD1QalRXikliJ",
        "serviceInstanceId": "crn:v1:bluemix:public:cloud-object-storage:global:a/3ag0e9402tyfd5d29761c3e97696b71n:d6f74k03-6k4f-4a82-b165-697354o63903::"
      }
    }
  }
}

• type is the name of this module
• desc is some text for the humans
• bucketName is the buckName you created
• endpoint is the Service Endpoint from the Endpoint section in the Object Store dasboard
• apikey is the apikey from the service credentials
• serviceInstanceId is the resource_instance_id from the service credentials

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":{"cardstore":{"type":"@ampretia/composer-wallet-ibmcos","desc":"Uses the IBM Cloud Object Store","options":{"bucketName":"alpha-metal","endpoint":"s3.eu-gb.objectstorage.softlayer.net","apikey":"0viPHOY7LbLNa9eLftrtHPpTjoGv6hbLD1QalRXikliJ","serviceInstanceId":"crn:v1:bluemix:public:cloud-object-storage:global:a/3ag0e9402tyfd5d29761c3e97696b71n:d6f74k03-6k4f-4a82-b165-697354o63903::"}}}}

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