HomeCoinsAdEx (ADX)What happened to network fees?! Understanding how Ethereum gas works | by...

What happened to network fees?! Understanding how Ethereum gas works | by Ivan Manchev | The AdEx Blog | Jan, 2021

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Some of the most common questions we’ve been receiving in the first days of 2021 are ”Why is it so expensive to withdraw my earnings?” or “Why does it take $30 to stake $ADX?” or “Why do transactions fail so often?”

There is an Ethereum gas crisis happening at the moment, so we felt it necessary to explain to our community what caused it and what we and you can and can’t do about it. You can easily find plenty of well written technical articles on how Ethereum gas works, but in this one we’ll try to explain it in simple terms and with the least possible amount of complex terminology.

This is an oversimplification but you can think of smart contracts like small computer programs; computer programs need to run in an appropriate environment — a computer. In computing, a virtual machine is an emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer.

The Ethereum virtual machine (EVM) is the virtual machine, in which all the smart contracts operate оn Ethereum. It is a simple yet powerful Turing Complete 256-bit virtual machine. Turing Complete means that given the resources and memory, any program executed in the EVM can solve any problem.

Does this sound feasible? Here comes gas.

Do they do it out of goodwill and general love of decentralization? Well, certainly, but also to earn network fees as an income in exchange for their computational power and effort.

Still no idea what gas is? Coming any moment, we promise!

In a popular analogy you can think of a road trip. To drive your car to your destination you need gas for which you pay in your local currency. It is very similar with smart contracts. Gas is the amount of computational power required for smart contracts to run on the EVM and it is paid in Ether (ETH).

More specifically, gas is set in Gwei per 1 gas, a one-billionth of an Ether (1 Gwei equals 0.000000001 or 10^-9 ETH)

Then why do you need “gas” if you pay in Ether eventually?” The gas system was invented in the original Ethereum yellow paper to incentivize miners to execute smart contracts.

Each and every line of code and each operation in Solidity, the computer language used for writing smart contracts for Ethereum, requires a certain amount of gas to be executed. You can see this chart of the Ethereum yellow paper for a rough idea of what some operations cost (note that some of the costs were updated with subsequent forks during time):

  • Gas limit — what is the maximum amount of gas you are willing to spend on this interaction;
  • Gas price in Gwei — how much are you willing to pay for gas

When you multiply the gas limit you have set by the gas price you get the cost of your transaction in Ether: e.g. 210,000 gas limit X 50 Gwei gas price = 0.0105 ETH

!Handy tip — you can use this Ethereum gas calculator to calculate gas costs.

“Bollocks! I’ve never done this in Metamask before…”

Yes, you have. Well, not you, technically, but Metamask has done it for you. Since this system is kind of complicated, most wallets do it for you. But how do they know how much you are willing to pay for gas?

As you know, the number of operations and transactions that can be executed per Ethereum block is limited, so there is a competition between pending transactions. Since miners are the ones who run the operations, they set the current gas price for which they are willing to process pending transactions. Gas price is determined by the competition for pending transactions. The more transactions there are to be processed, the more competition, resulting in a higher price.

Usually gas price revolves around 50–80 Gwei, but when there is a really stiff competition, it can rise to more than 150 Gwei.

Remember how back in September 2020 everyone was complaining again about gas prices skyrocketing? This was the yield farming season and following SushiSwap, new emoji coins and farms popped up every few days or so. There were few new automated market makers (AMMs) and total value locked (TVL) in decentralized finance (DeFi) DeFi jumped to more than $10 Billion.

Now just imagine how many people started playing around with smart contracts, connecting to different AMMs and farming tokens — the competition for each block soared and so did the gas price.

The other way to name this is “Network congestion”. When a network congestion occurs, very often, even if you are willing to pay the larger gas price, your transaction may not pass because of the huge number of other pending ones.

AdEx Network’s staking incentive was live during this gas crisis so our stakers felt it too. This is why we invented the gasless staking feature available today too.

Here is how it works:

When you go to the Gasless Staking page, you will receive a unique address for your gasless staking account. You can send as much ADX as you wish to this address from other addresses or exchange accounts. When there’s a minimum of 10,000 ADX deposited, you can click “Stake” and that amount will be staked without gas fees. Read more here.

The gas crisis we are experiencing right now is somehow different from the one back in September. Yes, in the last days of 2020 there were days when gas price reached 190 Gwei and more, as there were a lot of transactions following Bitcoin and Ethereum’s spikes. However, in the first weeks of 2021 prices stabilized with an average price of ~80 Gwei at the time of writing this post, but yet transaction fees keep being too high.

If you’ve read carefully along, you probably already know that it is because of the Ethereum price rally. ETH price has so far doubled since the beginning of December which basically means all transaction costs doubled, no matter the load of the network.

Unfortunately, the answer is “Not much”. As long as Ethereum works as a Proof-of-Work system, network congestion and high prices during bull runs will be inevitable. Ethereum 2.0’s Proof-of-Stake is expected to bring the desired scalability of the network, but we’ll have to wait a bit before it arrives.

However, it is not in our style to finish an article on a low note, so there’s some good news after all. We are constantly developing different improvements of both our advertising and staking platforms, so that our users don’t feel the gas burden when using them:

  • On our advertising platform, the whole gas concept is hidden for better user experience — the contracts are highly optimized and you pay for gas prices in DAI without even having to think about it.
  • On our staking platform you can save on gasless staking.

While you cannot control ETH’s price or the network’s load, there are some small hacks you can utilize to live an easier “Etherean” life:

Congrats! You now know more about how Ethereum gas works. If you want to get even more into detail, we recommend Blockgeek’s Ethereum Gas article and this article on Steemit.

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