How to split funds in single send transaction

Question

Scenario:

Alice Account = 2 ETH
Admin Account = 0 ETH
Bob Account = 0 ETH

Alice wants to send 1 ETH to Bob using my application. Application will charge 0.01 ETH as it's commission and will be added to total transaction fee

Total Fee = Application Fee (0.01) + Network Fee (gas limit * gas price)

Suppose Network fee is calculated to 0.001008 ETH.

Total payable amount = 1.011008 ETH (1 + 0.01 + 0.001008)

After successful transaction following should be the account details

Alice Account = 0.988992 ETH
Admin Account = 0.01 ETH
Bob Account = 1 ETH

where as 0.001008 ETH will be paid to miners

Query:

Q1. How can I build an application where a funds of a single send transaction can be sent to two different addresses (Bob's address and Admin's address)?

Q2. Is it possible to build such an application without using smart contracts?

You might need a fixed-point math library in order to do this. See PRBMath and this thread: What fixed or float point math libraries are available in Solidity? — Paul Razvan Berg, Oct 25 '22 at 09:15

score 4 · Accepted Answer · answered Jun 02 '18 at 14:25

An smart contract would need to be involved in the process. It would basically be transferred the funds and send them to different accounts as specified within its logic.

Here's a very quick example I've put together for you:

pragma solidity ^0.4.24;

contract Forwarder {

    address admin;
    uint fee = 10;

    constructor() public {

        admin = msg.sender;
    }

    function splitFunds(address _b) public payable {

        admin.transfer(msg.value * fee / 100);
        _b.transfer(msg.value - (msg.value * fee / 100));
    }
}

so fee equal 10 means 10 percent? or 1 percent? – Michael Adams Jan 21 '22 at 07:59 — Michael Adams, Jan 21 '22 at 07:59

How to split funds in single send transaction

1 Answers1