There are a lot of Blockchain applications but the 2 hottest winning applications at the moment seem to be Cryptocurrency and Supply Chain Management which is heavily promoted by Hyperledger.
Problems with the current supply chain workflow
A logistic supplier company provides management over the flow of source materials, goods…
Before we dive into different types of Blockchain, we need to know the difference between permissioned and permissionless Blockchain.
In a permissionless Blockchain, the consensus allows all nodes to have equal rights such as data access, creating transactions, validating transactions and producing new blocks.
In a permissioned blockchain, the consensus…
You have been reading around and heard a lot about how Blockchain is going to disrupt all industries in the future. You know your business needs to adapt to the Blockchain revolution. Following the traditional way, you started looking for Blockchain leaders and outstanding developers to join your company. You…
Many people could not relate to anything when they see the word “Dapps” (Decentralised Applications). For people who know what they are, they relate them to slowness, bugginess and cryptokitties. If the definition of a Dapp is simply any application that sits on top of the decentralised Blockchain, then the…
A Smart Contract is an agreement between 2 or more parties governed by the immutable Blockchain. Before we start writing the Smart Contract, it makes sense to ask ourselves a few questions which will make our life a lot easier when we code.
What is the Purpose?
There needs be…
We might be carried away with many use cases of Smart Contracts and the complex technologies build around it. Is the world ready for Smart Contract adoption? If so, why aren’t we seeing mass adoption in all industries?
Maybe we might be thinking too far ahead. The fact is that…
Many Ethereum wallets such as myetherwallet will tell you how much gas is required before you make a transaction. Sending Ethereum to another user account will cost 21000 but sending data requires some extra calculation. …
When smart contracts are deployed into the Ethereum blockchain, they are immutable and therefore, not upgradable. By re-architecturing the code into different contracts, it is possible to allow logic upgrades while keeping the storage the same. In fact, upgradable smarts contracts are becoming popular and Jack Tanner had a good…
For those interested in the Ethereum overflow bug found in many ERC20 tokens recently, this article is a technical review of what happened.
It is common to check against Integer overflow when writing Ethereum smart contracts. An easy way to think of overflow is when the integer reaches the max…
The best way to query a deployed ethereum contract is via the web3.js library and the ethereum wiki has very good documentation on it.
Web3 talks to the Ethereum node via RPC calls. However, most Ethereum developers (including myself) are more familiar with the truffle framework which abstracts our interaction…
