The life of a payment

Contract interface (sketch)

interface ISplit {
  // Rule: fixed basis points (sum 10_000) or points
  function recipients() external view returns (address[] memory, uint256[] memory);
  function coverFirst() external view returns (address, uint256);

  // Anyone can pay the split like any wallet
  receive() external payable;

  // Pays every recipient their share of what is waiting.
  // Rounds down; the dust goes to the largest share.
  function distribute(uint256 amount) external;

  // Payouts >= threshold need `required` approvals
  function propose(uint256 amount) external returns (uint256 id);
  function approve(uint256 id) external; // executes on the last approval

  function freeze() external;   // owner or approver
  function unfreeze() external;

  event PaymentReceived(address indexed from, uint256 amount);
  event Distributed(uint256 amount, address[] to, uint256[] amounts);
  event Frozen(address by);
}