Default to all splitters

src/payments/IPaymentCombiner.sol

@@ -37,7 +37,7 @@ interface IPaymentCombinerFunctions {
      * Get the list of pending shares for a payee.
      * @param payee The address of the payee
      * @param tokenAddr The address of the ERC-20 token. If the token address is 0x0, then the native token is used.
-     * @param splitterAddrs The list of payments splitters to check
+     * @param splitterAddrs The list of payments splitters to check. If empty then all splitters are used.
      * @return pendingShares The list of pending shares
      * @dev The list includes zero balances. These should be removed before releasing shares.
      */
@@ -50,8 +50,9 @@ interface IPaymentCombinerFunctions {
      * Release the pending shares for a payee.
      * @param payee The address of the payee
      * @param tokenAddr The address of the ERC-20 token. If the token address is 0x0, then the native token is used.
-     * @param splitterAddrs The list of payments splitters to release shares from
-     * @dev Use the listReleasableSplitters function to get the list of splitters and pending shares
+     * @param splitterAddrs The list of payments splitters to release shares from. If empty then all splitters are used.
+     * @dev Use the above functions to get the list of splitters and pending shares.
+     * @dev Calling splitters with no shares to release will fail.
      */
     function release(address payable payee, address tokenAddr, address[] calldata splitterAddrs) external;
 }

src/payments/PaymentCombiner.sol

@@ -73,6 +73,11 @@ contract PaymentCombiner is IPaymentCombiner, IERC165 {
         returns (uint256[] memory pendingShares)
     {
         uint256 len = splitterAddrs.length;
+        if (len == 0) {
+            splitterAddrs = _payeeSplitters[payee];
+            len = splitterAddrs.length;
+        }
+
         uint256[] memory payeePendingShares = new uint256[](len);
 
         if (tokenAddr == address(0)) {
@@ -98,6 +103,11 @@ contract PaymentCombiner is IPaymentCombiner, IERC165 {
     /// @inheritdoc IPaymentCombinerFunctions
     function release(address payable payee, address tokenAddr, address[] calldata splitterAddrs) external {
         uint256 len = splitterAddrs.length;
+        if (len == 0) {
+            splitterAddrs = _payeeSplitters[payee];
+            len = splitterAddrs.length;
+        }
+
         if (tokenAddr == address(0)) {
             for (uint256 i = 0; i < len;) {
                 PaymentSplitter(payable(splitterAddrs[i])).release(payee);