PaymentSplitter

1// SPDX-License-Identifier: MIT
2pragma solidity ^0.8.20;
3 
4contract PaymentSplitter {
5    address[] public payees;
6    uint256 public totalShares;
7    uint256 public totalReleased;
8    mapping(address => uint256) public shares;
9    mapping(address => uint256) public released;
10 
11    event PaymentReceived(address from, uint256 amount);
12    event PaymentReleased(address to, uint256 amount);
13 
14    constructor(address[] memory payees_, uint256[] memory shares_) {
15        require(payees_.length == shares_.length && payees_.length > 0, "BAD_INPUT");
16        for (uint256 i = 0; i < payees_.length; i++) {
17            address account = payees_[i];
18            uint256 sh = shares_[i];
19            require(account != address(0) && sh > 0 && shares[account] == 0, "BAD_PAYEE");
20            payees.push(account);
21            shares[account] = sh;
22            totalShares += sh;
23        }
24    }
25 
26    receive() external payable {
27        emit PaymentReceived(msg.sender, msg.value);
28    }
29 
30    function releasable(address account) public view returns (uint256) {
31        uint256 totalReceived = address(this).balance + totalReleased;
32        return (totalReceived * shares[account]) / totalShares - released[account];
33    }
34 
35    function release(address account) external {
36        require(shares[account] > 0, "NO_SHARES");
37        uint256 payment = releasable(account);
38        require(payment > 0, "NOT_DUE");
39        released[account] += payment;
40        totalReleased += payment;
41        (bool ok, ) = payable(account).call{value: payment}("");
42        require(ok, "TRANSFER_FAILED");
43        emit PaymentReleased(account, payment);
44    }
45}