From your first wallet to your next smart contract.
Useful guides. Clear explanations. A world to explore.
You approve a token, abandon the swap, and disconnect your wallet. Have you also removed the application’s permission to spend that token? No. Disconnecting changes the wallet’s relationship with a website. An…
A lending contract can calculate whether a borrower has enough collateral. But where does it get the price of that collateral? The…
Can you prove you know a secret without revealing it? Explore zero-knowledge proofs through a locked-door thought experiment, anonymous group membership, and…
More than $1.19 billion in leveraged crypto positions were liquidated in 24 hours, with Ether accounting for about $356 million. Here is…
Anyone can copy a digital record. Anyone can also claim that their copy is the correct one. So how can a payment…
You open a wallet, try to swap two tokens, and Ethereum asks you to pay a fee. A few minutes later, someone…
A Layer 2 network can look like an independent blockchain. It has transactions, accounts, applications, blocks and its own fees. But its…
When you use a crypto bridge, it can look as if a token simply moves from one blockchain to another. It does…
A smart contract is a program stored on a blockchain that executes predefined rules when it receives the right inputs. Instead of…
A blockchain can do more than record who owns what. On programmable blockchains such as Ethereum, it can also store and execute…
A blockchain has an unusual coordination problem. Thousands of computers may hold copies of the same ledger, yet there is no central…
A smart contract is not a digital version of a paper contract. It is a program deployed to a blockchain that can…
A crypto wallet is often described as a digital version of the wallet in your pocket. That analogy is convenient, but technically…
