Supported Transaction Types

EIP-155 introduced a simple replay attack protection mechanism for Ethereum transactions. It was implemented to prevent transactions on one Ethereum-based chain from being valid on another chain. Zircuit does support standard legacy transactions, which comply with EIP-155 (including chain ID).

At the moment, Zircuit does not support pre-EIP-155 transactions (without a chain ID). Attempting to submit such transactions will result in rejection.

Zircuit supports EIP-2930 transactions. EIP-2930 further extends this functionality by introducing "Access List" transactions, which allow for explicit inclusion of accounts and storage keys that a transaction will access. This addition helps in optimizing gas fees and improving the predictability of transaction costs.

EIP-1559 transactions are also supported on Zircuit. EIP-1559 introduces a new transaction pricing mechanism aimed at improving fee market efficiency. It includes a base fee, which is a minimum amount of gas that must be paid for a transaction to be included in a block, and adjusts dynamically based on network congestion. Along with the base fee, users can include a "priority fee" to incentivize the sequencer to prioritize their transactions