Coder tjener $ 8 millioner av Flashloaning Stablecoin Bug

Coder tjener $ 8 millioner av Flashloaning Stablecoin Bug

En dyktig koder har satt 8 millioner dollar i lomme ved å utnytte en reentrancy bug i Origin Protocols oUSD-smarte kontrakt.

OUSD er et nytt token som sporer dollarprisen 1: 1 ved å være støttet av andre stablecoins som USDt.

Prosjektet sier at denne USDt og andre stablecoin-eiendeler blir sendt til defi-protokoller for å tjene renter, med oUSD-symbolet som er fritt til å bevege seg eller brukes mens det også tjener interessen til de underliggende eiendelene.

Så i utgangspunktet er dette abstrakte eiendeler si på Compound, noe som gir dem et eiertegn Bitcoin Code, med dette tegnet nå fritt for utlåns- / lånebelastningen mens du nyter fordelen av renter.

Ganske kult, bortsett fra at det er en reentrancy bug. Eterere fra 2016 vil vite at slike feil er av den typen at på grunn av en kodefeil, den smarte kontrakten tror du har rett til å prikke tegnet når du faktisk ikke gjør det. Teamet sier, og vi siterer lenge:

“Angrepet var en gjenopprettelsesfeil i kontrakten vår. Dessverre var kontrakten vår trygg mot gjenopprettingsfeil med mindre en av våre støttede stablecoins angrep oss.

Angriperen utnyttet en manglende valideringskontroll i myntemultipel (når man myter OUSD med flere stallmynter) for å passere i en falsk “stablecoin” under deres kontroll. Denne „stablecoin“ ble deretter kalt „transferFrom“ videre av hvelvet, slik at hackeren kunne utnytte kontrakten med et gjenopprettingsangrep midt i mynten.

Angriperen var i stand til å lage en rebase-begivenhet inne i den andre mynten etter at midler hadde flyttet til OUSD fra den første store mynten, men før tilførselen av OUSD økte. Dette skapte en massiv rebase for alle i kontrakten, inkludert angriperen. Angriperen mottok da også sin første store OUSD-mynte, noe som ga dem totalt mer OUSD enn kontrakten hadde eiendeler.

Angriperen trakk de fleste stallmynter ut av OUSD.

De var da i stand til å ta ekstra OUSD etter å ha trukket og selge den på Uniswap og Sushiswap for USDT i påfølgende transaksjoner. ”

Flashloan-utnyttelse av Origin stablecoin, nov 2020

Denne koderen gadd å stoppe rundt og samle sammensatte tokens gitt for å gi likviditet med noen handlinger utført bare for å samle inn $ 9 verdier av eiendeler / eth.

Så å bringe transaksjonsgebyret til $ 250, en liten pris å betale for $ 8 millioner han mottok takket være noen få linjer med kode.

At 8 millioner dollar nå stort sett har gått gjennom mikser Tornado Cash og renBTC med teamet som ba om at hackeren skulle gi tilbake pengene.

Noe som han godt kan gjøre delvis, og returnerer kanskje 2 millioner dollar med resten, kanskje bedre brukt til å finansiere en slags kodeskole der han kan lære barna alt dette suset i sin båt.

Alt dette gratis egentlig så langt som han ikke trengte på forhånd 70 000 eth, 32 millioner dollar, da dYdX bare ga det til ham fordi flashloan-koden sjekket ut ganske mye fortjeneste.

Betydningen av smarte kontraktskodere må være enda mer forsiktig nå og må slette kostnadene ved angrep, fordi kostnadene med flashloans er ganske mye, noe som sparer dyktighet og kodingstid.

Bitcoin, a „very attractive store of value“ – hedge fund legend Stanley Druckermiller

Stanley Printmiller last demonstrated in 2008 that he “can handle a crisis”. Now the former head manager of the Soros hedge fund Quantum Fund sees the next crisis approaching – and Bitcoin as a possible hedge against it.

Henry Druckermiller has opened up to Bitcoin Code. Compared to the US news broadcaster, the founder of the former hedge fund Duquesne Capital granted digital gold the potential to be an attractive store of value, especially for millennials.

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The almost 12-year history of Bitcoin has shown that the demand for digital gold is higher than the supply.

The Bitcoin story is very simple. It’s about supply and demand. Bitcoin’s supply is growing about 2.5 percent annually, and demand is growing faster than that.

The self-proclaimed dinosaur holds Bitcoin himself to protect himself against the devaluation of the US dollar. However, gold still makes up the largest part of his „dollar decline basket“.

Good for Bitcoin? Corona vaccine could overheat economy

The self-proclaimed dinosaur holds Bitcoin himself to protect himself against the devaluation of the US dollar. In view of the macroeconomic situation, printing miller is inevitable that inflation will come:

Look at the extraordinary measures the Fed has taken […]. I think it is very likely that we will have inflation in the next five or six years. In a year or two – especially with a vaccine – the economy could be very hot. At the same time, all stimulus packages are in the pipeline and the strained supply chains between the US and China.

Druckermiller justifies this with the fact that gold has already proven itself as an asset and protection against inflation for 5,000 years. However, he admits that Bitcoin is potentially the more lucrative bet against the US dollar:

I hold a lot, a lot more gold than Bitcoin. But if the gold bet works out, the Bitcoin bet probably works out even better because it is thinner, more illiquid and has a better data base.

8.7 million dollars in ETH, blocked for 15 years … in a scam?

Some users are not cold-eyed – An internet user has invested $ 8.7 million in ETH on the HEX platform, an amount that will be blocked for 15 years. Between precursor and pigeon, there is only one step.

HEX: the blocked crypto savings account

The HEX project was launched on December 2, 2019, by Richard Heart, on the Ethereum blockchain.

This project aims to create a crypto version deposit account. Thus, users have the possibility to deposit funds there , which will be blocked for a defined period of time , and to receive interest on these assets.

20,000 ETH blocked over 15 years

During the last week, an anonymous Internet user deposited the equivalent of 20,000 ETH on the HEX platform through 7 separate transactions .

So far, nothing particularly alluring. However, the story is spiced up when we take a look at the time during which the funds will be blocked: 15 years .

Thus, the user has deposited 20,000 ETH, or approximately $ 8.7 million, which will be blocked on the HEX platform for the next 15 years , namely until 2034.

As one of the internet users on reddit put it so well: “We found the biggest balls in crypto”.

Precursor or finished pigeon?

However, several snags are inserted in this story.

At first, it is extremely risky to deliberately lock up such a large amount of money in such a “recent” smart contract for a period longer than the existence of the cryptocurrencies themselves.

The second problem lies in the legitimacy of HEX. Indeed, the platform offers returns on the assets deposited, that is, many completely legitimate platforms do the same.

However, when we take a closer look at the HEX site, all indicators suggest that this platform is not legitimate .

First astonishing point, HEX has a loyalty program that allows sponsors to earn more earnings per sponsored affiliate. Already there, it sounds like a scam. However it goes further, on the official site, HEX explains without complex that “using your own referral link, you will get 32% more HEX per ETH” .

More than doubtful advice …

On top of that, the site is full of more than questionable comparison between the past performance of Bitcoin and Ethereum prices, presenting HEX as a “safe” way to obtain superior returns.

“HEX is designed to outperform ETH, which has seen its price increase 10,000 times over in 2.5 years. It works ! So far, HEX’s dollar price has increased 115-fold in 129 days. HEX is safer, faster, cheaper, better for the environment, has more features, and caters to a larger market than Bitcoin. So far, the price of HEX has increased 92 times the price of Bitcoin. ” , explains the site.

Although the project has not been officially stamped with a scam by the crypto community, it is still extremely questionable. Cryptocurrency projects ensuring wealth and prosperity to their users are rarely the most honest.

Cinco razones por las que el precio de Bitcoin

Cinco razones por las que el precio de Bitcoin cayó y podría corregirse aún más

El precio de Bitcoin ha estado subiendo durante la mayor parte del 2020, pero en los últimos dos meses, el ímpetu de la criptocracia se ha disparado. Cualquier cosa que suba, debe en algún momento volver a bajar para enfriarse y recargarse antes de que pueda hacerlo todo de nuevo.

Después de un memorable empujón Bitcoin Era de los toros en las últimas semanas, las mareas pronto podrían cambiar. Aquí están los cinco factores clave que podrían causar una corrección más profunda, más allá de la conclusión de la política o la noticia de que una vacuna está cerca.

Las cinco razones por las que Bitcoin y Crypto podrían corregir mucho más

Como la oferta es absorbida por miles de goliats como Grayscale y corporaciones como MicroStrategy y Square, Inc, incluso los mineros de BTC no son capaces de producir suficientes monedas nuevas para mantener la demanda. El resultado es una subida parabólica de Bitcoin, que ha dejado incrédulos incluso a los partidarios de la criptocracia.
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El mes de septiembre comenzó con un fuerte choque de 2.000 dólares para volver a probar 10.000 dólares. La confirmación del toro se mantuvo, y a partir de ahí el activo criptográfico explotó en otro casi 60% a 15.900 dólares en el actual máximo de 2020.

Pero las cosas pronto podrían estar bajando después de una ola azul, la victoria de Joe Biden, y la noticia de que una vacuna es 90% efectiva. Aunque no se puede negar que la noticia tiene un impacto en el mercado, varias señales fundamentales y técnicas, sin embargo, predicen una corrección más profunda ahora que Bitcoin está perdiendo su impulso.

La curva parabólica que sostuvo a Bitcoin durante todo el rally, está finalmente a punto de romperse. La parábola, cuando se rompe, a menudo resulta en un 80% de retroceso del impulso anterior. Esto podría sugerir que la criptografía principal por capitalización de mercado podría caer hasta 4.000 dólares antes de continuar al alza.

Eliminar el 80% del reciente rally sería menos de un 40% de corrección total para Bitcoin, lo cual es común durante las sacudidas del mercado alcista.

La divergencia bajista del RSI de Bitcoin

Los osos podrían estar escondidos en las sombras, según el Índice de Fuerza Relativa de la Fuente: BTCUSD en TradingView.com

Otra señal de que una de esas sacudidas de firma está cerca, se debe a una masiva divergencia bajista oculta en el RSI que se extiende desde el pico de 2019.

El gráfico anterior demuestra cómo el Índice de Fuerza Relativa alcanzó un máximo más bajo, a pesar de que el precio alcanzó un máximo más alto. La divergencia entre ambos predice una caída, a menos que el RSI suba más para romper la divergencia.

Es interesante que Bitcoin haya elegido el nivel de retroceso de Fibonacci 0,786 de 20.000 dólares al fondo del mercado bajista como el área de elección para lo que podría ser una inversión a corto plazo.

La criptodivisa alcanzó el nivel de 0,618 en 2019, mientras que el nivel de 0,5 Fibonacci se sitúa en unos 11.500 dólares, lo que podría coincidir con los objetivos relacionados con la parábola rota de arriba.

El Bitcoin de CryptoQuant „Spot Exchanges Inflow Mean“ es una herramienta que proporciona una visión de cuánto BTC se está moviendo en los intercambios. Cuando este número aumenta, señala a las ballenas y el dinero inteligente está enviando BTC a las bolsas que probablemente se venderán, causando que los precios caigan.