Why is the gas fee so expensive?

What is Gas Fee? Gas fee is the fee paid to miners and on-chain network for each transaction, and it is required for each transaction. It is not charged by XEEX. Why is the Gas fee for buying tokens so much higher than the Gas fee for transfers? Gas fee is proportional to the complexity of the operation, the amount of computation, and the need for on-chain storage. The contract logic involved in token purchases is complex and the status updates are frequent. Transfers simply send assets from one address to another, which is relatively simple and requires less computing resources. *Note: There are also some special tokens that write smart contracts very complex, resulting in abnormally high Gas fees for each transaction. Therefore, the Gas fee for buying tokens is much higher than that for ordinary transfers. What are priority fees and normal, fast, and extreme speed modes? Priority Fee, also known as "Tip", is a fee mechanism introduced by Ethereum after the EIP-1559 upgrade. It allows users to pay additional fees to miners or validators in addition to paying the base fee (Gas Fee) in order to speed up the packaging of their transactions. Transactions that pay a higher gas fee tend to be processed first, so users can control the confirmation speed of transactions by adjusting the gas fee. You can try to adjust the fee/speed by selecting Normal, Fast, and Extreme modes in the transaction settings. Keep in mind that lower gas expenditures will cause your transaction to be processed very slowly, and may even cause your transaction to fail. In the period when the token is just opened or the trading incentive is low, the priority fee will inevitably lead to transaction failure. Is the gas fee a fixed value? No, the price of the gas fee changes dynamically and is affected by the degree of network congestion. When the network is busy, the gas fee will increase to attract miners to prioritize transactions; conversely, when the network is idle, the gas fee will decrease. The gas displayed on the transaction page is the price of the previous second, which fluctuates violently and is for reference only. Why does the gas fee fluctuate so much? The gas fee on Ethereum fluctuates greatly, mainly due to the combined effect of multiple factors such as the supply and demand relationship of the network, the market bidding mechanism, the complexity of transactions, the impact of major market events, and the packaging strategy of miners or validators. As transaction demand changes, Gas fees will fluctuate rapidly, especially when the network is congested, Gas fees tend to soar. The highest Gas fee in history once reached more than 1000 Gwei, and even briefly exceeded 2000 Gwei in extreme cases. Usually when it is 30 Gwei, the Gas price of each token transaction ranges from $20-50. Why was my Gas fee deducted when the transaction failed? Gas fees are the computational costs on the chain, which are necessary fees for conducting transactions or executing contracts, and are not charged by XEEX. When your transaction information is packaged and uploaded to the chain by XEEX, the chain also calculates and determines that your transaction cannot be completed and the transaction fails. Therefore, Gas fees cannot be refunded after the transaction fails on the chain.