Merge pull request #1306 from input-output-hk/feat/cad-5432-add-initial-plutus-script-support-js-sdk

Author: AngelCastilloB

packages/tx-construction/src/input-selection/selectionConstraints.ts

@@ -7,7 +7,8 @@ import {
   ProtocolParametersRequiredByInputSelection,
   SelectionConstraints,
   SelectionSkeleton,
-  TokenBundleSizeExceedsLimit
+  TokenBundleSizeExceedsLimit,
+  sortTxIn
 } from '@cardano-sdk/input-selection';
 import { MinFeeCoefficient, MinFeeConstant, minAdaRequired, minFee } from '../fees';
 import { TxEvaluationResult, TxEvaluator, TxIdWithIndex } from '../tx-builder';
@@ -116,7 +117,7 @@ export const computeMinimumCost =
   async (selection) => {
     const tx = await buildTx(selection);
     const utxos = [...selection.inputs];
-    const txIns = utxos.map((utxo) => utxo[0]);
+    const txIns = utxos.map((utxo) => utxo[0]).sort(sortTxIn);
 
     if (tx.witness && tx.witness.redeemers && tx.witness.redeemers.length > 0) {
       // before the evaluation can happen, we need to point every redeemer to its corresponding inputs.

packages/tx-construction/test/tx-builder/TxBuilderPlutusScripts.test.ts

@@ -282,6 +282,43 @@ describe('TxBuilder/plutusScripts', () => {
     expect(roundRobinRandomImprove).toHaveBeenCalled();
   });
 
+  it('can point the redeemer to the right input', async () => {
+    const tx = await txBuilder
+      .addInput(
+        {
+          index: 99,
+          txId: 'ff21ffbaff60ff0cff8cff55ffa6ff6dff78ff78ffaeffceff36ff3fffc5ffe0' as unknown as Cardano.TransactionId
+        },
+        {
+          datum: 1n,
+          redeemer: 1n,
+          script
+        }
+      )
+      .addOutput(
+        txBuilder
+          .buildOutput({
+            address: Cardano.PaymentAddress(
+              'addr_test1qqt9c69kjqf0wsnlp7hs8xees5l6pm4yxdqa3hknqr0kfe0htmj4e5t8n885zxm4qzpfzwruqx3ey3f5q8kpkr0gt9ms8dcsz6'
+            ),
+            value: { coins: 5_000_000_000n }
+          })
+          .toTxOut()
+      )
+      .build()
+      .inspect();
+
+    expect(
+      tx.body.inputs?.some((txIn) => txIn.txId === 'ff21ffbaff60ff0cff8cff55ffa6ff6dff78ff78ffaeffceff36ff3fffc5ffe0')
+    ).toBeTruthy();
+    expect(tx.witness?.redeemers?.some((redeemer) => redeemer.data === 1n)).toBeTruthy();
+
+    const scriptInputIndex = tx.body.inputs?.findIndex(
+      (input) => input.txId === 'ff21ffbaff60ff0cff8cff55ffa6ff6dff78ff78ffaeffceff36ff3fffc5ffe0' && input.index === 99
+    );
+    expect(tx.witness?.redeemers?.at(0)?.index).toEqual(scriptInputIndex);
+  });
+
   it('can set an script input for required selection with inline datum (unresolved),', async () => {
     const tx = await txBuilder
       .addInput(