Calculate number of witnesses when balancing the transaction

input-output-hk · Apr 29, 2024 · 35ab519 · 35ab519
1 parent f045847
commit 35ab519
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/hydra-node/src/Hydra/Chain/Direct/Wallet.hs b/hydra-node/src/Hydra/Chain/Direct/Wallet.hs
@@ -38,6 +38,7 @@ import Cardano.Ledger.Api (
   ppMaxTxExUnitsL,
   rdmrsTxWitsL,
   referenceInputsTxBodyL,
+  reqSignerHashesTxBodyL,
   scriptIntegrityHashTxBodyL,
   witsTxL,
  )
@@ -311,9 +312,7 @@ coverFee_ pparams systemStart epochInfo lookupUTxO walletUTxO partialTx@Babbage.
         unbalancedTx
           & bodyTxL . outputsTxBodyL %~ (|> feeTxOut)
           & bodyTxL . feeTxBodyL .~ Coin 10_000_000
-      -- XXX: Not hard-code but parameterize to make this flexible enough for
-      -- later signing and commit transactions with more than one sig
-      additionalWitnesses = 2
+      additionalWitnesses = 1 + length (partialTx ^. bodyTxL . reqSignerHashesTxBodyL)
 
   -- Balance tx with a change output and computed fee
   change <-