
Ethereum Transaction Types Explained: Legacy and Types 1–4
Understand Ethereum legacy, access-list, dynamic-fee, blob, and set-code transactions, including type bytes, fee fields, uses, and risks.

Understand Ethereum legacy, access-list, dynamic-fee, blob, and set-code transactions, including type bytes, fee fields, uses, and risks.

Learn how Ethereum Recursive-Length Prefix encoding turns bytes and nested lists into one canonical stream, including transaction and trie use cases.

Learn how an Ethereum account nonce orders transactions, blocks replay, creates queue gaps, and changes how developers query pending account state.

Learn what unsafe, safe, and finalized mean for Ethereum rollup transactions, why withdrawals take longer, and which status your app should trust.

Learn why an Ethereum transaction stays pending, how nonce order and fees affect it, and when speeding up, canceling, or waiting is the safest response.