How Scientists Steal Your Profits From Selling NFTs
Original title: "In-depth analysis: How did scientists steal your profits from selling NFTs?" "
Original author: Do you understand the world a little better today?
This article comes from the WeChat public account:
You can pay attention to my official account "Do you understand the world better today " to check out previous articles and have more in-depth exchanges and discussions with me, or you can Follow my Twitter: jason_chen998 Take a look at his transaction records first, please observe first, have you found any problems?
This address buys and sells the same NFT at the same point in time, which is What does it mean? We entered the transaction records of opensea and found one of the NFT records to take a look. The cost of buying was 0.08E, and the selling cost was 0.56E, a 7-fold increase, and the book profit was 0.48E.
This income is not bad, but you need to know that this address has 300 such transactions, and the average It is generated every 3 hours, and profits are generated continuously, and more than 100,000 RMB can be earned in a day.
It's time to solve the case again, let's take everyone to follow the clues to find out what is going on with such a magical operation.
Friends who are familiar with DeFi should be aware of clip robots, and subconsciously think that this may be a clip. I thought so at the time, but in fact it is not .
Here is a brief introduction to what a clip robot is, and a separate article will be published later. The clip robot will monitor the chain According to the buying situation on the Internet, when there is a large order to buy a certain currency, it will definitely increase the price of the currency, so immediately rush to increase the gas fee before him to buy first, and when the big order is successfully purchased, the price of the currency will be raised. Then sell it immediately to make a profit. The whole process is completed in a very short time.
But why the situation I want to talk about today is not a clip robot is because the biggest difference between NFT and FT is non-homogeneity. "Directional", that is, both the buyer and the seller are trading on the same NFT. For example, Zhang San wants to sell Azuki#9527, and Li Si also wants to buy Azuki#9527. Only then will there be a transaction between the two. Even if I sell at a low price If I bought a certain NFT, then I couldn’t immediately find someone who wanted to buy it at a high price to take over the order, wouldn’t it just fall into my own hands? And because FT is homogeneous and has higher liquidity than NFT, the probability of me selling it after buying will also increase greatly.
So it can be inferred that the principle should not be a clip robot.
There is no clue here, let's look for clues from the transaction records, we open one of the operations and see that it is the same block in the same block In the transaction, the robot completes the behavior of buying low and selling high between two people.
When I saw this, I was confused again. The robot quickly bought the same NFT from A , and then sold to B, then why doesn't A directly sell to B, and B doesn't directly buy from A! Why let the robot make so much money by inserting a knife in the middle, because in such a short few seconds, B is not a fool. He watched helplessly that the previous second was still 0.08E, and the next second he bought it with 7 times. There is no reason, I have been thinking about it for a long time, but I can't figure it out... In fact, after deduction later, I found that B is really a fool, so since we can't call it a clip robot, let's call it a fool sniper, and then reason it out to see the end How did you snipe at the fool.
Let’s analyze this transaction again. A sold to the robot at 0.08E, and the robot sold to B at 0.56E. If it is a normal operation process , that should be:
A places an order at 0.08E, the robot spends 0.08E to buy it, the robot then places an order at 0.56E, and B spends another 0.56E to buy it, but just now Speaking of the whole process of buying and selling is completed instantaneously in one block, so it must not be through this form of placing orders, buying, placing orders again, and buying again.
It is difficult to reason simply by looking at the operation of the robot. Let's take a look at the upstream and downstream sellers A and Buyer B What did they do.
We entered the seller's address to find the operation record of this #5054, we can see that he listed it at a price of 0.08E 2 days ago, and then It was bought by the robot at 0.08E 1 day ago, so the upstream buying process has been sorted out, and the robot has indeed bought the NFT that has already placed an order through conventional means.
What about the downstream sales? Why can it be several times higher in an instant? Price sold to B? Let's look at buyer B's operation record.
B made an offer of 0.56E to #5054 a day ago, and the robot was sold to B.
Wait, I'm a little confused, isn't A already placed an order for 0.08E? Why does B quote 0.56E? B is stupid, don't buy it at 0.08E, but buy it at 0.56E if it's too low? Yes, B is stupid.
Okay, let’s treat B as a fool and play with money. Isn’t this NFT in the hands of A? Logically speaking, B is also the price quoted by A. A sold it to B, but why does B's transaction record show that it was sold to him by a robot?
The only possibility is that the robot recognizes that there is a fool B who has taken advantage of it and wants to spend 7 times the price to buy A’s NFT, so the robot initiates a When making an offer, before A has accepted it, he immediately bought A's NFT at the original price, and then sold it to B at 7 times the offer of B.
At this time, the problem comes again, won’t opensea verify who the offer of B is reported to? When B submits an offer to A’s NFT and the robot buys A’s NFT, is the offer still valid? If so, does it belong to A or the robot? According to common sense, I want to spend 100,000 yuan to buy your car. At this time, you sold the car to Zhang San for 20,000 yuan. Is the 100,000 yuan I promised at that time still valid? Can Zhang San buy his car again? Sell it to me for the 100,000 yuan I promised you at the time?
It’s definitely not possible in the real world. I think Zhang San bought your car for only 20,000 yuan. Why should I spend 100,000 yuan? But don’t forget, the charm of Web3 lies in smart contracts. Everything is contracted, and it will run automatically according to the rules when it is on the chain. Since you promised to buy it for 100,000 at the time, it doesn’t matter where the car is now. Anyway, as long as the contract is fulfilled, you can You have to give me the money and obediently take out this broken car.
Let's test this link, that is, A places his NFT order, B makes an offer, and after I buy A's NFT, can it still be Sell it to B at the current price.
First of all, I prepare three accounts, namely robot, seller A and buyer B.
First seller A sells his NFT at a price of 0.01E pending order.
Then switch to the account of buyer B, assuming that I am blind and have not seen the pending order of 0.01E , Don’t buy the cheap ones, and report an offer of 0.05E for 5 times.
After switching back to seller A, I found that a fool really doubled the price for me by 5 times, I am very happy.
At this time, the ruthless fool's sniper is on the scene, we switch to the robot account, at the original price of 0.01E buy it at the price.
Next comes the most exciting part, let's see if the 0.05E offer is still there, refresh it .... exist! And you can accept!
The ruthless robot pressed accept at this time, harvesting 0.05E from the foolish buyer B, and the seller A is also very happy that the 0.01NFT that he just placed an order for has been sold, but he has missed the 0.05 that a fool gave him.
The case will be solved here. To sum up, this robot is specially designed to catch those blind fools. Note that the order price was directly quoted a much higher offer, and then the robot detected that an NFT generated an offer that was much higher than the order price, so it immediately dispatched to quickly buy the NFT, and then accepted the offer to sell at a high price go out.
How can the robot operate successfully in such a short period of time? Let’s take a look at the details of his transaction records, where From is the real holding behind the robot People, you can see that the transaction gave ethermine a fee of 0.38E at the end, which is to bribe the miners to increase the gas fee to quickly write this operation of the robot into the block.
In fact, it seems that I made a difference of 0.48. In fact, more than half of them have paid the gas fee. Not much left.
At present, besides this robot, I have seen 3 other robots of the same type, so many people in this direction have already sensed business opportunities and rolled them up. Because the comparison is whose speed is faster, these robots are monitoring the data of the whole network at any time, as soon as they find it, they will swarm up and increase the gas fee to bribe the miners to write their own transactions first, so as more and more people enter the game, they will end up Working in a mine.
So far, the case has been solved. I have already talked about many more sophisticated scams in my previous articles to remind everyone to pay attention. I did not expect today I actually want to remind everyone not to buy with your eyes closed... Before you buy, check the gap between your offer price and the quotation.
As I have emphasized many times, the world of Web3 is a dark forest. Everyone who enters the game thinks he is a hunter. In fact, you may just be hunted Killing little white rabbit, the following is the address of the robot contract, if you are interested, you can go and see for yourself:
0xbe69dde0a051e72e18871be52cf506e419058f11
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