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About EIP1559

The Cube Chain do not fully support EIP1559.

Specificly, in Cube, the BaseFee will always be zero, and a miner (Block Proposer) can set its required minimal gas price.

User can still using the eth_gasPrice or eth_maxPriorityFeePerGas to get a suggested gasPrice.

When sending a DynamicFeeTxType transaction (e.g. when using metamask), user should set both maxFeePerGas and maxPriorityFeePerGas to a same value.