For example, originally user A calls eosio.token to user B to transfer 1EOS, and then eosio.token sends a trasfer receipt to call the transfer function of contract B to execute business logic. Now, you can directly call the transfer function of contract B, specifying from and to. Correct parameters such as, value, etc., are directly exCan you buy bitcoin with PayPalecuted to the business logic of the B contract without transferring funds. Therefore, the attacker attacking EOSBet completely bypassed the eosio.token->transfer function and directly called eosbetdice11->transfer with the correct parameters, and executed the business logic of the contract without transferring EOS to the contract.
But by the middle of the 21st century, a promising new company like Facebook could attract millions of dollars in financing even before it became a household name. Moreover, the funds of the private sector ensure that the company’s key software information is a trade secret in order to obtain as much value as possible for shareholders.
On the afternoon of Tuesday, October 1, 2013, on the quiet second floor of a small library in San Francisco, the online black market using Bitcoin as the medium suffered a major blow. A pale, thin man was sitting at a corner table near the science fiction section, tapping his laptop keyboard. He is 29-year-old Ross Ulbricht from Austin, Texas. He is a computer genius. He lives a few blocks away with a few roommates.
It has been 10 years since Bitcoin was born, and it has gained a lot of enthusiastic supporters from no one in the beginning. Especially in some economically turbulent areas, such as Venezuela, Bitcoin has become a tool for people to survive, and it has become the only way for people to obtain food and other necessities.
The design of Basecoin (now renamed Basis) is based on SeignorageShares, introducing bonds (BondToken). In this system, when the demand of BASIS increases, ShareToken increases the money supply in the form of dividends. When the trading price of BASIS is lower than 1 U.S. dollar, the algorithm will automatically shrink the supply and the currency will shrink until the price rises to 1 U.S. dollar. In order to achieve the contraction of the money supply, the algorithm will issue discount bonds to BASIS holders, and the BASIS recovered will be destroyed. The supply decreases and the price rises.
Bitcoin has experienced a week of plunge. Bitcoin once fell to $9,200 and then rebounded to a relatively stable position. In the procCan you buy bitcoin with PayPaless, Tether issued nearly 100 million U.S. dollars of tether (USDT)-a cryptocurrency pegged to the U.S. dollar-and subsequently issued another 100 million U.S. dollars worth of tether every day for the next three days. Tether is funding and further supporting the Bitcoin market, but if this move stops, what will happen then? Will there be regulators stepping in, or Tether's closure, the initial capital loss will be catastrophic.
On May 12, Yves Mersch, a member of the Executive Committee of the European Central Bank (ECB), stated at the CoinDesk consensus meeting that the bank is developing a retail central bank digital currency (CBDC). Mersch said that the current majority of transactions in the Eurozone (about 76%) are carried out in cash, so the ECB's debate on CBDC is mainly analytical. However, the lack of specific business cases will not prevent the European Central Bank from exploring CBDC. For this reason, it has established a CBDC task force within the euro system.