Comprehensive guide to block explorer concepts, features, and advanced topics.
This section provides detailed explanations of the data you see in OpenScan.AI — from blocks and transactions to tokens, NFTs, verified contracts, and AI-powered insights.
In This Section
Blocks
What a block is, how blocks are produced and finalized, and how to read block data in the explorer.
Transactions
Transaction anatomy: hashes, senders and recipients, value transfers, status, and receipts.
Addresses
Externally owned accounts vs. contract addresses, nonces, balances, and address pages.
Gas & Fees
How gas works on EVM chains, gas price vs. gas used, and how transaction fees are calculated.
Tokens (ERC-20)
Fungible token standards, transfers, balances, and how OpenScan.AI tracks token activity.
NFTs (ERC-721 & ERC-1155)
Non-fungible token standards, token IDs, metadata, mints, and transfers.
Verified Contracts
What source-code verification is, why it matters, and how to read and interact with verified contracts.
Logs & Events
Event logs emitted by smart contracts, topics, and how indexers decode them.
AI Insights
How OpenScan.AI uses AI to summarize transactions, explain contracts, and surface on-chain patterns.