Transactions go through several stages from the time they are constructed to the time they are finally confirmed on the chain. A good understanding of these stages will help users and developers better identify problems with sending transactions and ultimately ensure that transactions are successfully confirmed or even finalized.
Transaction is an important concept in blockchain. If you are not familiar with the concept of transactions and would like to quickly understand it, you can read Transaction Quick Intro.
Conflux eSpace initially supports transactions in the Ethereum 155 format (legacy transactions). After the v2.4.0 hardfork, it starts to accept type-1 (EIP-2930) and type-2 (EIP-1559) format transactions. This compatibility enables seamless transition for mainstream Ethereum SDKs and tools. Type-3 transactions (EIP-4844) are currently not supported.