{"id":61455,"date":"2021-09-30T11:26:00","date_gmt":"2021-09-30T11:26:00","guid":{"rendered":"https:\/\/pt.cryptonews.com\/?p=61455"},"modified":"2022-07-04T07:57:23","modified_gmt":"2022-07-04T07:57:23","slug":"deversifi-explica-o-que-causou-a-taxa-de-transacao-de-us-23-milhoes-no-ethereum","status":"publish","type":"post","link":"https:\/\/cryptonews.com\/br\/noticias\/deversifi-explica-o-que-causou-a-taxa-de-transacao-de-us-23-milhoes-no-ethereum\/","title":{"rendered":"DeversiFi explica o que causou a taxa de transa\u00e7\u00e3o de US$ 23 milh\u00f5es no Ethereum"},"content":{"rendered":"
<\/figure>

A exchange n\u00e3o custodial DeversiFi <\/strong>– cuja carteira estava envolvida na transa\u00e7\u00e3o Ethereum (ETH) que custou US$ 23,5 milh\u00f5es – explicou o que aconteceu. <\/p>

De acordo com o relat\u00f3rio, \u201cproblemas subjacentes na biblioteca EthereumJS (JavaScript) que coincidem com as mudan\u00e7as nas taxas de g\u00e1s associadas \u00e0 atualiza\u00e7\u00e3o EIP-1559 em algumas circunst\u00e2ncias podem levar a transa\u00e7\u00f5es com taxas extremamente altas.\u201d<\/p>

Al\u00e9m disso, as carteiras de hardware Ledger <\/strong>podem exibir as taxas de uma maneira n\u00e3o leg\u00edvel por humanos.<\/p>

Eles acrescentaram que apenas carteiras com “uma quantidade muito grande de fundos” seriam afetadas, enquanto o resto veria uma transa\u00e7\u00e3o fracassada.<\/p>

Durante a investiga\u00e7\u00e3o sobre a causa raiz, a equipe realizou dep\u00f3sitos simulados usando Ledgers para replicar o problema. Eles descobriram que \u201cquando o g\u00e1s e as taxas de prioridade foram calculados e ent\u00e3o convertidos em um objeto de grande n\u00famero. Como os \u00faltimos blocos s\u00e3o usados \u200b\u200bpara prever taxas de prioridade, o c\u00e1lculo pode resultar em uma casa decimal.\u201d A biblioteca EthereumJS n\u00e3o suporta valores decimais, ent\u00e3o isso levaria a um erro – mas \u201ccomo o valor foi convertido em um buffer primeiro, nenhum tratamento de erro foi acionado\u201d.<\/p>

Como exemplo, eles deram a passagem um valor de 33974230439.550003, que definiria um n\u00famero inteiro 35624562649959629 – potencialmente seis ordens de magnitude maior do que o pretendido.<\/p>

\u201cA DeversiFi est\u00e1 se envolvendo ativamente com a comunidade Ethereum e Ledger para corrigir problemas que podem ter contribu\u00eddo para essa ocorr\u00eancia\u201d, disse o relat\u00f3rio, acrescentando que: \u201cEIP-1559 n\u00e3o protege contra gastos excessivos acidentais\u201d.<\/p>

Conforme relatado, a exchange de criptomoedas Bitfinex <\/strong>pagou US$ 23,5 milh\u00f5es (ETH 7.676,61) em taxas de transa\u00e7\u00e3o para uma transfer\u00eancia de cerca de US$ 100.000 em Tether (USDT) atrav\u00e9s da rede Ethereum. Um dia depois, a mineradora daquele bloco devolveu todos os fundos, menos ETH 50 dados como taxa de devolu\u00e7\u00e3o.<\/p>

O fundador do Rotkiapp<\/strong>, Lefteris Karapetsas, descreveu a leitura desta aut\u00f3psia como \u201chorr\u00edvel\u201d. \u201cO fato de que isso pode acontecer mostra como a criptografia UX [experi\u00eancia do usu\u00e1rio] e as prioridades est\u00e3o quebradas\u201d, disse ele.<\/p>

<\/oembed><\/figure>","protected":false},"excerpt":{"rendered":"

A exchange n\u00e3o custodial DeversiFi – cuja carteira estava envolvida na transa\u00e7\u00e3o Ethereum (ETH) que custou US$ 23,5 milh\u00f5es – explicou o que aconteceu. De acordo com o relat\u00f3rio, \u201cproblemas subjacentes na biblioteca EthereumJS (JavaScript) que coincidem com as mudan\u00e7as nas taxas de g\u00e1s associadas \u00e0 atualiza\u00e7\u00e3o EIP-1559 em algumas circunst\u00e2ncias podem levar a transa\u00e7\u00f5es com […]<\/p>\n","protected":false},"author":30,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1,7],"tags":[],"editores":[884],"sponsored_companies":[],"class_list":["post-61455","post","type-post","status-publish","format-standard","hentry","category-noticias","category-ethereum-news","editores-cryptonewscom"],"acf":[],"yoast_head":"\nDeversiFi explica o que causou a taxa de transa\u00e7\u00e3o de US$ 23 milh\u00f5es no Ethereum<\/title>\n<meta name=\"description\" content=\"A exchange n\u00e3o custodial DeversiFi - 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