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Макс-

Добрый день. А как можно реализовать что-бы один контракт мог

выполянятся только 1 раз с одного аккаунта?

#cryptocurrency #eth #russian
0

2 ответов

20 просмотров
ilya-

Изучи основы solidity, вопрос отпадёт.

0
23.12.2020
Sergey-Mironov

mapping (address => bool) private _isNew; В самой функции: в начале require (!_isNew[msg.sender]); в конце _isNew[msg.sender] = true;

0
23.12.2020

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