base fee

Under EIP-1559, the base fee is burned and adjusts dynamically with network demand.在 EIP-1559 下，基础费用会被销毁，并随网络需求动态调整。

The base fee rises when blocks are more than 50% full and falls when they are below that threshold.当区块饱和度超过 50% 时，基础费用会上升；当低于该阈值时，基础费用会下降。