Not long before, making use of the flaw of data overflow in BatchOverFlow of ERC-20 smart contact, hackers attacked the BEC smart contact. This lead to that massive BEC tokens are withdrawed to two addresses. It is understood that hackers can produce no-exist, massive and the same tokens as real tokens, which can be transferred to normal accounts. To a further extent, the token received can be exchanged normally. This morning, SMT is exploded to have the same flaw. Some exchanges ( Pro and OKEx) have stopped SMT transactions. According to Pro announcement, there are exceptions on SMT transaction. After examination, flaws are found in SMT ERC-20 smart contact. Pro has tested that exception is shown in TXID:0x0775e55c402281e8ff24cf37d6f2079bf2a768cf7254593287b5f8a0f621fb83.
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