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Considering Blockchain Technolgies for the freeradiantbunny webapp

The webapp freeradiantbunny is an open source software project dedicated to helping gardeners create garden maps and lists of plants.

The webapp freeradiantbunny is a kind of inquiring system for gardeners. The system allows us to ask questions about our gardens.

The webapp freeradiantbunny is also a kind of decision support system. We can use it to help us plan the gardens.

Now, it may be useful for the webapp freeradiantbunny to interact with the world, say with temperature sensors in the garden, seed catalogs, and with expert information in the public databases of the world.

To help us with these use-cases, we consider blockchain technologies.

As a reference baseline, check out this webpage: "BLOCKCHAIN TECHNOLOGIES: BUSINESS INNOVATION AND APPLICATION"

Where Does One Start to Explain Blockchain Technologies?

On this blog we approach the many technologies of Bitcoin from a particular perspective, that of our garden-mapping and plant-listing webapp.

So, adopting this pragmatic perspective, here is a listing that introduces several of the main ideas that we find should be highlighted:


Bitcoin is a peer-to-peer electronic cash system, and a revolution in Finance that began with the publishing of the bitcoin paper in 2008.


A peer-to-peer network of computers all using the same software reaches concensus about the current state of an immutable ledger called a blockchain.


The ledger is totally out in the open and can be viewed using block explorers. Owners send, receive, and view balances using software wallets.


In the wake of Bitcoin, was the creation of hundreds of cryptocurrencies.


Software code is stored on the blockchain, enabling smart contracts, A primary use-case for this technology is programmable cash.

Going Over the Reasons Why Blockchain Technologies Are Useful

Here is a listing of ideas that pertain to blockchain technologies. Although there is much to learn, it may be worth it because applied blockchain technologies may create strategic business value. Consider the following:

(1) The Cambrian Explosion of applied cryptography innovation has resulted in a large number of cryptocurrencies, each with a use case and often its own ecosystem of businesss and software development. Blockchain technologies are enabling organizations to create new revenue models.

(2) Blockchain technology is disrupting many industries, especially banking and financial services. One trend is Finance Technology (FinTech) as traditional finance builds a layter of blockchain functionality. Another trend is the disruption happening due to Decentralized Finance (DeFi) applications. These DeFi apps are currently providing simple financial services such as loans on a blockchain and borrowing on a blockchain. The age of programmable money on the Internet is upon us.

Ading Value with a freeradiantbunny cryptocurrency inquiring system

Therefore, the aim of this blog is to consider how the various cryptocurrencies (especially those developing DeFi technologies) might add value to the freeradiantbunny application.

The idea is to leverage the webapp freeradiantbunny and create a knowledge management system for analyzing cryptocurrencies.

Adding Value by integrating Decentralized Finance (DeFi) Technologies

The exchange of money and currencies (stored on blockchains) is being programmed so that transactions are executed by smart contracts (which are also on blockchains). Consumers access these cryptocurrencies and financial services via web applications on their smartphones and/or desktop computers. Financial services are evolving into decentralized apps. As traditional (centralized) banking is increasingly threatened by lack of trust and the loss of confidence in the dollar, people are increasingly interested in smart contracts for alternative solutions.

These smart contracts are programmable agreements placed on the blockchain. The smart contracts are the centerpiece of a whole new class of application called decentralized applications (DApps). And the marketplace for these DApps is growing, especially on Ethereum blockchain. Measures of this growth of the DApps markets are shown by this 2019 Annual Dapp Market Report.

Existing DeFi DApp use cases include decentralized exchanges (example: atomic swaps) and decentralized finance functions (example: flash loans). The increase in DeFi DApps users suggests a growing market. The rankings of DeFi DApps suggests that Ethereum is currently most popular; however, many different blockchains are being developed as platforms for DeFi DApps development.

In conclusion, the freeradiantbunny application could benefit from DeFi DApp technology. We ask: How might DeFi DApp technologies add value to the freeradiantbunny application? To research this question and to explore the opportunities of blockchain technology, we next consider the skills of a Blockchain Developer in general and one who develops DeFi DApps in particular.

Consider the skills of a Blockchain Developer who specializes in DeFi DApps

This blog will now consider the role of a Blockchain Developer who develops DeFi DApps. To do this, we discuss all the skills needed for blockchain develoment. Along the way, we apply this knowledge to development of demo smart contracts that enable a user of the freeradiantbunny webapp to interact with DeFi technology.

Blockchain Developer skills:

  1. software developer skills
    • professional development
    • design, design patterns, Software Architecture
    • Software Development; Agile; Continuous Delivery;
    • editors: emacs, Sublime Text
    • Backup & Recovery
  2. blockchain technology
    • Bitcoin
    • Ethereum project and ERC-20 standard for tokens
    • XRP distributed ledger technology
    • miscellaneous blockchain projects
  3. wallets
    • browser-plugins (metamask)
    • applications Ubuntu-based
    • browser-based wallets
    • security of private keys
    • cryptocurrnecy exchanges
    • analysis of coins (fundamental)
    • technical analysis (TradingView charting)
  4. develop stock back-end server
    • vps deployment (, doctl)
    • encrypted communications (ssh, sshd)
    • Cloud Computing
    • Kubernetes
    • Containers
    • sysadmin (Linux, Debian, Ubuntu)
    • webserver (NGINX defaults to static html)
    • encrypted website (ssl certificate via certbot)
    • network applications (node.js, pm2; microservices)
    • remote database (managed postgresql)
    • webserver (express as proxy for dynamic html)
    • inquiring system (web framework freeradiantbunny; search)
    • Kafka
  5. data
    • relational databases; nosql
    • SQL
    • Database Administration
    • Data Engineering
    • Data Governance
    • Data Quality
    • Data Wrangling, Preparation, Cleaning
    • Information Architecture
  6. devops
    • source code management (git, github; npm, npm)
    • building (continous integration)
    • containerized environment (docker)
    • testing methodology
    • packaging (artifact repository)
    • releasing
    • configuring (infrastructure as code)
    • monitoring
  7. DApps (smart contracts)
    • interface to existing smart contracts (moneymaker_measurement_instances)
    • Ethereum Virtual Machine
    • browser-based DApp development (remix)
    • command-line DApp development
    • contract law
  8. programming languages
    • Linux server with terminal (command-line, perl)
    • JavaScript (for freeradiantbunny development)
    • Solidity (for Ethereum smart contracts)
    • Go (program Docker containers)
  9. tools for developing DApps
    • bash terminal
    • text editor (Sublime Text 3)
    • solc (Solidity compiler)
    • truffle suite (on local machine or droplet)
    • ganache cli (local blockchain for testing)
    • migrate to blockchain from truffle project
    • Ethereum client (geth, parity, fiews,io,
    • block explorer, interacting (eg. etherscan; ethers.js)
    • security auditor apps (find vulnerabilities in smart contracts)
  10. develop front-end web applications (client-side UI)
    • HTML5 & CSS
    • node.js (runtime environment)
    • React, Vue,js (user interface library; React Native)
    • web3.js (ethereum javascript api)
    • IPFS, Swarm Gateway (file systems, storage)
    • test user-agents (laptops, phones, monitors)
    • WebSocket
    • RESTful Web Services
  11. build demo dapps
    • demo: launch token
    • demo: swaps
    • demo: lists on the blockchain
    • demo: data pipeline from weather device
    • demo: get data and publish analytics
    • demo: aggregate public data and add analytics
    • admin: security; intrusion detection system (tripwire)
  12. node operator
    • chainlink node (provide data to smart contracts
    • ETH 2.0 validators (proof-of-stake

miscellaneous topics

more contents of the blog

index blockchain, block explorers, chainlink node, oracles, cryptocurrencies, dapps, solidity, defi, defi-analytics, ecosystems, stock, wallets, Bitcoin, Ethereum, XRP.

other documents

Notes on How to Install chainlink node

More Links


prices of cryptocurrencies (

cointelegraph analysis

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© 2021 Lars Paul Linden