You’re probably heard of Blockchain by now – the relativity new technology underpinning a whole host of cryptocurrencies and distributed apps, promising exciting solutions across a range of markets, from IoT and machine to machine communication and healthcare, to identity management, supply chain and more.
But, have you got to grips with how they work? How you use them? What they can do? How you code apps on them?
Intended as a foundation for developing applications or solutions with a modular architecture, Hyperledger Fabric allows components, such as consensus and membership services, to be plug-and-play.
HyperLedger Fabric leverages container technology to host smart contracts called “chaincode” that comprise the application logic of the system.
As part of the Sandbox, we’ll provide you with an Ubuntu VM that has four docker containers containing the peers of the blockchain, split across two separate organisations. Each one of these peers is capable of hosting your chaincode that can be used to execute code on Fabric that support well, any app or logic that you wish!
Of course, feel free to re-configure the peers and organisations as you wish, along with build more channels to communicate on (hit the Hyperledger Fabric link earlier to learn more about these concepts or fire directly over here).
We also provide you with a short example of how to transact on the blockchain and move some value across peers taking part in the chain, to get you started, should you need.
There’s also the CLI that you can use should you wish to explore this method of interaction further.
Note that we're using LevelDB as the data store on our deployment of HyperLedger fabric. It's a light-weight, single-purpose library for persistence with bindings to many platforms, including Fabric.
As always, let us know what you think of the Sandbox and provide us any feedback through the Sandbox forums. Cisco are a premier member of the HyperLedger effort, so we’d love to know what you think!
Unable to access DNA center through GUI due to login error. using the credentials admin/Cisco1234! or Admin/Cisco1234! not working"Unable to Login at this time. Please try again at a later stage" error message.Only DNA center is having login i...
I've tried accessing the always-on ACI sim and have as of yet been unable to do so. I've tried via Chrome, Firefox & even IE. I later discovered the site has a bad cert and our proxy blocks access to any site with cert errors. Is there any way to fix ...
I want to sign my docker application package that I would like to host on a Catalyst 9000 DevNet Sandbox. I am following the steps from this guide:https://www.cisco.com/c/en/us/support/docs/cloud-systems-management/iox/212472-configure-iox-package-signatu...
This is more of a basic python question than anything.Working through the Official Cert Guide for DevNet associate and in chapter 8 example 8-7 for the DNA center SDK I'm running into an issue. When looping through the devices with the (for DEVICE in DEVI...