I wrote upgradable smart contract using solidity and upgraded contract several time.
When I upgraded smart contract, implementation contract address was changed.
But under that address, the old implementation contract address still remains.
contract YourContract {
// State variables
// Some functions
function destruct(address addr) ownerOnly {
selfdestruct(addr);
}
// The above function sends all ether from the contract to the specified address
}
Particularly you can't hide anything once it is stored on the Blockchain. The old address will still be visible.
But if you want that calling to the old contract should fail, you can simply create a self destruct function inside your smart contract and call it when you have updated the smart contract and deployed it with a new address.
Tip -
Always have smart contracts with the self destruct functionality
Whenever you update your smart contract i.e deploy it to a new address, call the self destruct function on the old contract address for it to be destroyed.
Syntax for self destruct -
contract YourContract {
// State variables
// Some functions
function destruct(address addr) ownerOnly {
selfdestruct(addr);
}
// The above function sends all ether from the contract to the specified address
}
发布评论
评论（1）
特别是一旦将任何东西存储在区块链上，就无法隐藏任何东西。旧地址仍然可以看到。
但是，如果您希望呼叫旧合同应该失败，则可以在智能合约中创建
自我毁灭功能，并在更新智能合约并使用新地址部署它时将其调用。提示 -
自我毁灭的智能合约功能自我破坏的语法 -
Particularly you can't hide anything once it is stored on the Blockchain. The old address will still be visible.
But if you want that calling to the old contract should fail, you can simply create a
self destructfunction inside your smart contract and call it when you have updated the smart contract and deployed it with a new address.Tip -
self destructfunctionalitySyntax for self destruct -