Do you want to know how much user sent to

Question

Solidity Development

Serg Borichev

Do you want to know how much user sent to

your SC?
in this case
balances[msg.sender] += msg.value;

#english #programming #solidity

0

04.06.2022

14 ответов

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Serg Borichev Автор вопроса

Recep Tayyip Erdogan
i got it, but When I want to withdraw to an addres...

firstly receive() external payable { balances[msg.sender] = msg.value; } you need to change to receive() external payable { balances[msg.sender] += msg.value; } if i send ETH to your contract a few times, in your case the balance will be equal to last value, not a sum of all transactions

0

04.06.2022

Recep Tayyip Erdogan

Recep Tayyip Erdogan
i got it, but When I want to withdraw to an addres...

0

04.06.2022

Recep Tayyip Erdogan

Recep Tayyip Erdogan
function withdraw(uint256 amount, address payable ...

not works, why? any idea?

0

04.06.2022

Freezy

Recep Tayyip Erdogan
function withdraw(uint256 amount, address payable ...

sprry but do you have an idea of what you are doing?

0

04.06.2022

Serg Borichev Автор вопроса

Recep Tayyip Erdogan
function withdraw(uint256 amount, address payable ...

balances[to] = balances[to]; 0 = 0 1 = 1 doesn't make sense ))

0

04.06.2022

Learning Learner

Why this error?

0

04.06.2022

Serg Borichev Автор вопроса

Kraken 😆

0

04.06.2022

Learning Learner

Why this error?

Anyone help plz

0

04.06.2022

Lucky | SkillerX

Learning Learner
Anyone help plz

testnet ? mainnet ?

0

04.06.2022

Learning Learner

Lucky | SkillerX
testnet ? mainnet ?

testnet

0

04.06.2022

Freezy

Learning Learner
testnet

stop asking for help

0

04.06.2022

Learning Learner

Freezy
stop asking for help

Bro. I know solidity. The point is, contract is written fine and compiled well. Still I am facing an error.

0

05.06.2022

Freezy

Learning Learner
Bro. I know solidity. The point is, contract is wr...

you know solidity?

0

05.06.2022

Recep Tayyip Erdogan · Accepted Answer

i got it, but When I want to withdraw to an address with 0 balance, it gives an error. what can I do address sender; uint256 value; mapping (address => uint256) balances; receive() external payable { balances[msg.sender] = msg.value; } function returnAll(address _address) public view returns (uint256) { return balances[_address]; } function returnBalance() public view returns (uint256) { return address(this).balance; } function withdraw(uint256 amount, address payable to) public { require(balances[msg.sender] >= amount, 'you have no balance'); to.transfer(amount); balances[to] = balances[to] - amount; }

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Do you want to know how much user sent to

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