feat: helper function to convert TransactionInput to PlutusData (#1108)

NOTE: this updates the required Go version to 1.24 because plutigo
requires it

Fixes #1099

Signed-off-by: Aurora Gaffney <[email protected]>

Author: agaffney

.github/workflows/go-test.yml

@@ -16,7 +16,8 @@ jobs:
     name: go-test
     strategy:
       matrix:
-        go-version: [1.23.x, 1.24.x]
+        # TODO: go back to last 2 versions once 1.25 is released
+        go-version: [1.24.x]
         platform: [ubuntu-latest]
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/golangci-lint.yml

@@ -18,6 +18,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.23.x
+          go-version: 1.24.x
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v8

go.mod

@@ -1,12 +1,13 @@
 module github.com/blinklabs-io/gouroboros
 
-go 1.23.6
+go 1.24.0
 
 toolchain go1.24.1
 
 require (
 	filippo.io/edwards25519 v1.1.0
 	github.com/blinklabs-io/ouroboros-mock v0.3.8
+	github.com/blinklabs-io/plutigo v0.0.2-0.20250716022656-7418e5ead692
 	github.com/btcsuite/btcd/btcutil v1.1.6
 	github.com/fxamacker/cbor/v2 v2.9.0
 	github.com/jinzhu/copier v0.4.0

go.sum

@@ -3,6 +3,10 @@ filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
 github.com/blinklabs-io/ouroboros-mock v0.3.8 h1:+DAt2rx0ouZUxee5DBMgZq3I1+ZdxFSHG9g3tYl/FKU=
 github.com/blinklabs-io/ouroboros-mock v0.3.8/go.mod h1:UwQIf4KqZwO13P9d90fbi3UL/X7JaJfeEbqk+bEeFQA=
+github.com/blinklabs-io/plutigo v0.0.1 h1:IBM3+dm7Sy92zgm9SBvIwVXN/73Jvg/ipDwbgRDeVFo=
+github.com/blinklabs-io/plutigo v0.0.1/go.mod h1:N7id3F9kjRcvm/BMxwZsBWUSJTGsUEwVRfFz3Tt5LPM=
+github.com/blinklabs-io/plutigo v0.0.2-0.20250716022656-7418e5ead692 h1:irMl0GGNv5heP8LpYBG4Z+a/RYqmmHVESZEa/Ba/67s=
+github.com/blinklabs-io/plutigo v0.0.2-0.20250716022656-7418e5ead692/go.mod h1:Bh2zD801zEN90MIFv78HF1d3c/RpG/GD18wQrbdeN+0=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.0-beta.0.20220111032746-97732e52810c/go.mod h1:tjmYdS6MLJ5/s0Fj4DbLgSbDHbEqLJrtnHecBFkdz5M=
 github.com/btcsuite/btcd v0.23.5-0.20231215221805-96c9fd8078fd/go.mod h1:nm3Bko6zh6bWP60UxwoT5LzdGJsQJaPo6HjduXq9p6A=

ledger/byron/byron.go

@@ -19,9 +19,11 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"math/big"
 
 	"github.com/blinklabs-io/gouroboros/cbor"
 	"github.com/blinklabs-io/gouroboros/ledger/common"
+	"github.com/blinklabs-io/plutigo/pkg/data"
 	utxorpc "github.com/utxorpc/go-codegen/utxorpc/v1alpha/cardano"
 )
 
@@ -377,6 +379,17 @@ func (i ByronTransactionInput) Utxorpc() (*utxorpc.TxInput, error) {
 	}, nil
 }
 
+func (i ByronTransactionInput) ToPlutusData() data.PlutusData {
+	// This will never actually get called, but it's identical to Shelley
+	return data.NewConstr(
+		0,
+		[]data.PlutusData{
+			data.NewByteString(i.TxId.Bytes()),
+			data.NewInteger(big.NewInt(int64(i.OutputIndex))),
+		},
+	)
+}
+
 func (i ByronTransactionInput) String() string {
 	return fmt.Sprintf("%s#%d", i.TxId, i.OutputIndex)
 }

ledger/common/tx.go

@@ -16,6 +16,7 @@ package common
 
 import (
 	"github.com/blinklabs-io/gouroboros/cbor"
+	"github.com/blinklabs-io/plutigo/pkg/data"
 	utxorpc "github.com/utxorpc/go-codegen/utxorpc/v1alpha/cardano"
 )
 
@@ -61,6 +62,7 @@ type TransactionInput interface {
 	Index() uint32
 	String() string
 	Utxorpc() (*utxorpc.TxInput, error)
+	ToPlutusData() data.PlutusData
 }
 
 type TransactionOutput interface {

ledger/shelley/shelley.go

@@ -19,9 +19,11 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"math/big"
 
 	"github.com/blinklabs-io/gouroboros/cbor"
 	"github.com/blinklabs-io/gouroboros/ledger/common"
+	"github.com/blinklabs-io/plutigo/pkg/data"
 	utxorpc "github.com/utxorpc/go-codegen/utxorpc/v1alpha/cardano"
 )
 
@@ -367,6 +369,16 @@ func (i ShelleyTransactionInput) Utxorpc() (*utxorpc.TxInput, error) {
 	}, nil
 }
 
+func (i ShelleyTransactionInput) ToPlutusData() data.PlutusData {
+	return data.NewConstr(
+		0,
+		[]data.PlutusData{
+			data.NewByteString(i.TxId.Bytes()),
+			data.NewInteger(big.NewInt(int64(i.OutputIndex))),
+		},
+	)
+}
+
 func (i ShelleyTransactionInput) String() string {
 	return fmt.Sprintf("%s#%d", i.TxId, i.OutputIndex)
 }

ledger/shelley/tx_test.go

@@ -0,0 +1,49 @@
+// Copyright 2025 Blink Labs Software
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package shelley_test
+
+import (
+	"encoding/hex"
+	"math/big"
+	"reflect"
+	"testing"
+
+	"github.com/blinklabs-io/gouroboros/ledger/shelley"
+	"github.com/blinklabs-io/plutigo/pkg/data"
+)
+
+func TestShelleyTransactionInputToPlutusData(t *testing.T) {
+	testTxIdHex := "1639f61ed08f5e489dd64db20f86451a0db06e83d21ea39c73ea0a93b478a370"
+	testTxOutputIdx := 2
+	testInput := shelley.NewShelleyTransactionInput(
+		testTxIdHex,
+		testTxOutputIdx,
+	)
+	testTxId, err := hex.DecodeString(testTxIdHex)
+	if err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+	expectedData := data.NewConstr(
+		0,
+		[]data.PlutusData{
+			data.NewByteString(testTxId),
+			data.NewInteger(big.NewInt(int64(testTxOutputIdx))),
+		},
+	)
+	tmpData := testInput.ToPlutusData()
+	if !reflect.DeepEqual(tmpData, expectedData) {
+		t.Fatalf("did not get expected PlutusData\n     got: %#v\n  wanted: %#v", tmpData, expectedData)
+	}
+}