October 2025
Intermediate to advanced
570 pages
16h 46m
Portuguese (Portugal, Brazil)
book
Dominando o Ethereum, 2nd Edition
by Carlo Parisi, Alessandro Mazza, Niccolo Pozzolini, Gavin Wood, Andreas M. Antonopoulos
Content preview from Dominando o Ethereum, 2nd Edition
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Capítulo 6. Transações
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
As transações são mensagens assinadas originadas por uma conta de propriedade externa, transmitidas pela rede Ethereum e registradas no blockchain da Ethereum. Essa definição básica esconde muitos detalhes surpreendentes e fascinantes. Outra maneira de ver as transações é que elas são as únicas coisas que podem desencadear uma mudança de estado ou fazer com que um contrato seja executado no EVM. A Ethereum é uma máquina de estado singleton global, e as transações são o que fazem essa máquina de estado "funcionar", mudando seu estado. Os contratos não são executados por conta própria. A Ethereum não é executada de forma autônoma. Tudo começa com uma transação.
Neste capítulo, dissecaremos as transações, mostraremos como elas funcionam e examinaremos os detalhes. Observe que grande parte deste capítulo é destinada àqueles que estão interessados em gerenciar suas próprias transações em um nível baixo, talvez porque estejam escrevendo um aplicativo de carteira; você não precisa se preocupar com isso se estiver satisfeito com os aplicativos de carteira existentes, embora possa achar os detalhes interessantes!
A estrutura de uma transação
Primeiro, vamos dar uma olhada na estrutura básica de uma transação à medida que ela é serializada e transmitida na rede Ethereum. Cada cliente que recebe uma transação serializada a armazena na memória usando ...
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