Linked Questions

1
vote
1answer
1k views

What is the core difference between send and transfer method of address payable in solidity? [duplicate]

I'm learning solidity I got two methods for transferring ether <address payable>.send(1 ether) <address payable>.transfer(1 ether) Both are used to transferring ether to the recipient ...
5
votes
3answers
28k views

How to transfer Ether between accounts in Solidity?

I'd like get ether balance of account in solidity. I tried the following, but it didn't work. Could you tell me how to do it? contract MultiplyContract{ address public buyer; address public ...
19
votes
3answers
8k views

send VS call - differences and when to use and when not to use

Can somebody please explain the differences between using a send and call for contracts and when to use and not use these different methods? For example : msg.sender.send(number); msg.sender....
16
votes
3answers
11k views

Contract address.transfer method gas cost

Who will pay the gas in the following scenario? Lets say we have the following simple function. That sends an amount from the contract back to the sender.. just an example. function withdraw() ...
14
votes
2answers
5k views

Is transfer() still safe after the Istanbul update?

In other words, is using transfer() safe? function transfer(address contractB) public { contractB.transfer(1000); //balances[msg.sender] -= 1000; } How about using call.gas? function ...
18
votes
1answer
3k views

How much computation can be done in a fallback function?

Simply sending Ether to a contract, will run the contract's code. In Solidity, this code maps to what it calls the fallback function. How much work can be done in a fallback function?
3
votes
2answers
740 views

Explain working of address.send function in solidity

I have been trying to get documentation for address.send() function, but i am unable to do so. Can someone please explain how address.send() function works, and how it can be used to send currency ...
1
vote
0answers
2k views

How to use transfer(), send() and msg.value?

When I deploy a contract with a function with receiver.transfer(), receiver.send() or a msg.value function, the function can't get executed when I try to interact with it (MyEtherWallet and web3 via ...
1
vote
1answer
1k views

Call address.transfer() with Gas Limit and Price from another function

I have a smart contract where user can transfer ETH to an ICO. Like this function buyICO(paymentAddress, amount) { // do some other important things // transfer the amount to the payment address ...
1
vote
1answer
994 views

How send eth from a smart cotract

For example, I have 10 eth on my smart contract. How I send eth on another address?
0
votes
1answer
787 views

how to transfer a specific balance from a smart contract?

Whenever someone buys a smart-contract the amount (in Wei) get stored in SC(Smart Contract) address(this) += msg.value. Now I am trying to create a function to redeem the balance of the SC ...
2
votes
1answer
419 views

Why can't we use Transfer() to get a fallback from a contract?

Does this discussion imply that we cannot call transfer() to some contract and call its fallback function and can only do the same by using call() and setting gas?
2
votes
1answer
335 views

Is the "transfer" call in Solidity asynchronous?

I'm asking myself if the call to a function like transfer in solidity is asynchronous. In other words, I'm working with the following contract function count_and_pay() public { if (lockCon == true)...
0
votes
1answer
305 views

The constructor should be payable if you send value - contract sending ether to another contract throwing an error?

I'm trying to implement re-entrancy hack for my own contract. Here is a great article that explains the method: https://medium.com/@gus_tavo_guim/reentrancy-attack-on-smart-contracts-how-to-identify-...
0
votes
1answer
269 views

When is hashing used when creating a smart contract?

I was going through the solidity docs and in a contract example given I have seen keccak256 used. // Perform checks to determine if transferring a token to the // `OwnedToken` contract should proceed ...

15 30 50 per page