Ethereum Asked by Alireza Zojaji on December 24, 2020
Suppose we have a proxy contract that separates Data layer from Logic layer.
We have a struct
in Data contract, like this:
struct person {
uint id;
string name;
}
mapping(address => person) persons;
We have deployed this contract and the Dapp users have entered data in it.
Now suppose we want to change the logic contract and add a birth_year
field to the struct. how can we make this change to the struct dynamically? Its final form would be as follows:
struct person {
uint id;
string name;
uint birth_year;
}
mapping(address => person) persons;
Even assembly language is acceptable, but sure Solidity is better.
This is typically possible in interpreted languages like Python and Javascript.
And it is typically not possible in strongly-typed languages like C and Solidity.
Answered by goodvibration on December 24, 2020
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