I want to calculate fees for historical EIP-1559 transactions on Astar EVM. For this, I need to use the
GasPrice = BaseFee + MaxPriorityFeePerGas < MaxFeePerGas ?
BaseFee + MaxPriorityFeePerGas :
MaxFeePerGas values are available in transaction data and are set by the user but
BaseFee value is not. As far as I know this value is set by the system and is dynamic. Is there a way to retrieve this
BaseFee value for historical blocks? Is this information stored in the blockchain and can it be read directly?
In order to get
baseFee value using the Ethereum API see @gluneau answer.
When it comes to the Substrate API:
In the Astar blockchain, there exists a
BaseFee pallet, which stores the
baseFee value for each block. We can access its storage to fetch the
baseFee value for any specific block.
For instance, with the Substrate Sidecar API, we can use the following path to obtain the
baseFeePerGas value for block number 1300000: