Tag: ethereum
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Merkle trees explained – Part 3: Merkle verification in Solidity and Javascript
In Part 1 and Part 2 of this series, we have explored what are merkle trees, definition, concept and how merkle trees can be used to check the proof of inclusion. In this part, let’s checkout how we can perform merkle verification in smart contracts and in javascript. Merkle Verification in Smart contracts First thing…
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Merkle trees explained – Part 2: How verification of presence works
In part 1 of this article, we tried to understand what merkle trees are and the concept behind. We know that merkle trees help us in verifying whether a particular data point is the part of the tree ( merkle root ) or not. In this part, let’s go through exactly how this process of…
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Merkle trees explained – Part 1: What are merkle trees?
If you are a dev / techie and if you have a high level understanding of blockchains, you surely have heard this buzzword: “Merkle trees”. Wikipedia says: In cryptography and computer science, a hash tree or Merkle tree is a tree in which every “leaf” (node) is labelled with the cryptographic hash of a data block,…
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Solidity tips and tricks #2: Avoid storage data mutations and operations
EVM has three types of data storage locations: Storage Memory Calldata Each data location has a different purpose and using them appropriately will save us gas and money. Keep in mind that, in some situations, Solidity strictly enforces a default location. Storage When placed in storage, a variable is written on the blockchain. Everything that…
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Solidity tips and tricks #1: Unchecked arithmetic trick
In my attempt to use my twitter and linkedIn to share interesting things and insights in Web3 on Ethereum, EVM, smart contracts, which I come across in my daily work as a web3 dev. Here we go:Announcing – “Solidity Tips and Tricks Series”. Solidity Tips and Tricks #1: Unchecked Arithmetic trick Before solidity compiler version…
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Basic overview of data types in solidity
Solidity is a high-level, object-oriented programming language that is used to write smart contracts and build D-apps. It also supports inheritance, libraries, and sophisticated user-defined types. Solidity is a statically typed language. That means, you will have to declare the type of variables in advance unlike javascript. Any programming language has basic data types and…