fix: ife spend with wrong index

This commit is the fix on the contract for input spend challenge
omgnetwork · Mar 4, 2020 · 62b7d32 · 62b7d32
1 parent 5a654fa
commit 62b7d32
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/plasma_framework/contracts/src/exits/payment/controllers/PaymentChallengeIFEInputSpent.sol b/plasma_framework/contracts/src/exits/payment/controllers/PaymentChallengeIFEInputSpent.sol
@@ -136,7 +136,8 @@ library PaymentChallengeIFEInputSpent {
         GenericTransaction.Transaction memory challengingTx = GenericTransaction.decode(data.args.challengingTx);
 
         GenericTransaction.Transaction memory inputTx = GenericTransaction.decode(data.args.inputTx);
-        GenericTransaction.Output memory output = GenericTransaction.getOutput(inputTx, data.args.challengingTxInputIndex);
+        PosLib.Position memory utxoPos = PosLib.decode(data.args.inputUtxoPos);
+        GenericTransaction.Output memory output = GenericTransaction.getOutput(inputTx, utxoPos.outputIndex);
 
         ISpendingCondition condition = data.controller.spendingConditionRegistry.spendingConditions(
             output.outputType, challengingTx.txType