MongoDB storage provider for Openchain Server

This project implements a storage provider for Openchain Server using MongoDb as a persistence media.

It implements Records & Transactions storage and Anchors storage.

Installation

• Edit the Openchain webapp project.json

  • Remove dnxcore5 in the frameworks section (mongodb driver currently lacks support for dnxcore)
  • Add MongoDB storage provider as a dependency

  {
      "version": "0.5.0-rc1",
      "entryPoint": "Openchain.Server",
  
      "dependencies": {
          "Openchain.Server": "0.5.0-rc1-*",
          "Openchain.Validation.PermissionBased": "0.5.0-rc1-*",
          "Openchain.Anchoring.Blockchain": "0.5.0-rc1-*",
          "Openchain.MongoDb": "0.1.0-alpha1"
      },
  
      "userSecretsId": "Openchain.Server",
  
      "commands": {
          "start": "Microsoft.AspNet.Hosting --webroot \"Webroot\" --server Microsoft.AspNet.Server.Kestrel --server.urls http://localhost:8080"
      },
  
      "frameworks": {
          "dnx451": {
          }
      }
  }

• Edit the Openchain webapp config.json

  • Edit the root storage section specifying the following parameters :
    • provider : MongoDb
    • connection_string : MongoDB connection string to your MongoDb instance
    • database : Name of the MongoDb database to use

  "storage": {
      "provider": "MongoDb",
      "connection_string": "mongodb://localhost",
      "database": "openchain"
  },

  • Edit the anchoring storage section :
    • provider : MongoDb
    • connection_string : MongoDB connection string to your MongoDb instance
    • database : Name of the MongoDb database to use

  "anchoring": {
      //...
      "storage": {
          "provider": "MongoDb",
          "connection_string": "mongodb://localhost",
          "database": "openchain"
      }
  }

Running

At first startup, needed collections and indexes are created.

3 collections are used :

• records containing records details
• transactions containing transactions details
• pending_transactions containing transactions still being committed to the database (this collection is always nearly empty).