docs: add explanation on why not need to filter challenged in/output

omgnetwork · Feb 17, 2020 · 15dffd9 · 15dffd9
1 parent 5dbe305
commit 15dffd9
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/plasma_framework/contracts/src/exits/payment/controllers/PaymentProcessInFlightExit.sol b/plasma_framework/contracts/src/exits/payment/controllers/PaymentProcessInFlightExit.sol
@@ -256,6 +256,8 @@ library PaymentProcessInFlightExit {
     {
         for (uint16 i = 0; i < PaymentTransactionModel.MAX_INPUT_NUM(); i++) {
             PaymentExitDataModel.WithdrawData memory withdrawal = exit.inputs[i];
+
+            // challenged input would remove the piggyback flag
             if (token == withdrawal.token && exit.isInputPiggybacked(i)) {
                 bool success = SafeEthTransfer.transferReturnResult(
                     withdrawal.exitTarget, withdrawal.piggybackBondSize, self.safeGasStipend
@@ -278,6 +280,8 @@ library PaymentProcessInFlightExit {
     {
         for (uint16 i = 0; i < PaymentTransactionModel.MAX_OUTPUT_NUM(); i++) {
             PaymentExitDataModel.WithdrawData memory withdrawal = exit.outputs[i];
+
+            // challenged output would remove the piggyback flag
             if (token == withdrawal.token && exit.isOutputPiggybacked(i)) {
                 bool success = SafeEthTransfer.transferReturnResult(
                     withdrawal.exitTarget, withdrawal.piggybackBondSize, self.safeGasStipend