A blockchain application is any piece of software that stores its data or runs its logic on a distributed ledger instead of a single company’s server. Rather than one database controlled by one party, the record is copied across many…
A merkle tree is a cryptographic data structure that summarizes a large set of data in a single hash while making individual pieces of that data easy to verify. Instead of checking an entire dataset, a system can verify one…
Ethereum wallets have traditionally worked in a simple way: one private key controls one externally owned account, or EOA. That model is predictable, but it makes modern wallet features such as transaction batching, sponsored gas, spending limits, alternative authentication, and…
If you have ever tried to interact with an Ethereum smart contract from a web application, script, wallet, or blockchain library, you have probably encountered an ABI. A smart contract ABI, or Application Binary Interface, describes how external software can…
Ethereum sharding is the effort to split the network’s data and validation work into smaller pieces, so it can handle more activity without forcing every single node to process every single byte. That’s the short definition — but it’s also…
“UTXO vs account model” is the question behind one of the most basic design choices in blockchain architecture: how does a decentralized network remember who owns what? Bitcoin answers it with the UTXO model, where your balance is really just…
Building a dapp on Ethereum means writing a smart contract, testing it, deploying it to a live chain, and connecting a frontend that lets people use the dapp — without a company server in the middle. A dapp, short for…
A privacy coin is a cryptocurrency built to hide the sender, receiver, and amount of every transaction, using cryptography instead of a company’s privacy policy. Bitcoin and Ethereum publish that same data forever on a ledger anyone can read; Monero,…
Minting an NFT is the act of publishing a unique digital record onto a blockchain: a smart contract assigns it a token ID, links it to your wallet address, and writes the transaction permanently into that chain’s history. Once the…
Simulating a transaction on Ethereum means running it against the blockchain’s current state to see exactly what it would do, without spending gas or broadcasting anything to the network. You find out whether it succeeds, how much gas it needs,…