What does "s_variable" mean? #2970
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Sorry, just saw some variables named as "s_<variable_name>". |
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Replies: 2 comments 1 reply
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@yangyueche It is a Chainlink style guide, that in order to remember a variable whether it is a state variable, immutable variable, constant variable, or local variable. They introduce suffix for them, here And someone can question why should we remember that. So the answer is while writing contracts we can know which variable we are using if suppose it is a state variable so we will become careful to perform any operation on it because as you know performing operations on state variables cost gas. Read a state variable has different gas and updating/storing in a state variable has a different cost. |
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@yangyueche Additionally, there is also the convention to use E.g. uint256 number;
constructor(uint256 _number) {
number = _number;
} |
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Thank you! |
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@yangyueche It is a Chainlink style guide, that in order to remember a variable whether it is a state variable, immutable variable, constant variable, or local variable. They introduce suffix for them, here
srepresent a state variable.And someone can question why should we remember that.
So the answer is while writing contracts we can know which variable we are using if suppose it is a state variable so we will become careful to perform any operation on it because as you know performing operations on state variables cost gas. Read a state variable has different gas and updating/storing in a state variable has a different cost.