An RPC endpoint is a URL your application sends requests to in order to read data from a blockchain or broadcast a transaction to it. RPC stands for Remote Procedure Call: your code calls a function, that function runs on…
A Layer 2 blockchain is a separate network that runs on top of a base chain like Ethereum. It processes transactions off to the side to make them faster and cheaper, then settles the results back to the base chain…
Throughput and latency sound like the same idea, but they measure two different things. Throughput is how many transactions a network settles per second. Latency is how long your single transaction waits before it’s final. A chain can be strong…
Every blockchain runs on a network of computers called nodes. A node keeps a copy of the chain, checks new transactions against the rules, and passes valid data to the other computers in the network. Once you understand what a…
сBlockchain finality is the point at which a transaction is settled for good and can no longer be reversed, reordered, or dropped from the chain. Before that point, a transaction can look confirmed and still be undone. After it, the…
Reading data from a blockchain sounds like it should be simple. The data is public, after all. In practice, pulling a wallet’s full trading history or every transfer of a token is one of the harder problems in Web3 development,…
Onchain data is information stored directly on a blockchain — every transaction, wallet balance, and smart-contract state that the whole network keeps and can verify. Offchain data is everything kept somewhere else: a company’s servers, a file on IPFS, a…
Blockchain data streaming is a way to receive on-chain events the moment they happen, instead of asking the network for updates over and over. Your application opens a long-lived connection, subscribes to the events it cares about, and the data…
You access the Ethereum mempool through WebSocket subscription to newPendingTransactions, or a specialized mempool API — the right choice depends on whether you need full transaction details, just a live stream of hashes, or data aggregated across many nodes at…
An Ethereum transaction is a signed instruction, sent from an account you control, that either moves ETH to another address or triggers code on a smart contract. Every transaction is cryptographically signed with a private key, broadcast to the network,…