feat: Allegra era 'Utxo' validation rules (#885)

Fixes #876

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

Author: agaffney

ledger/allegra/errors.go

@@ -0,0 +1,32 @@
+// 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 allegra
+
+import (
+	"fmt"
+)
+
+type OutsideValidityIntervalUtxoError struct {
+	ValidityIntervalStart uint64
+	Slot                  uint64
+}
+
+func (e OutsideValidityIntervalUtxoError) Error() string {
+	return fmt.Sprintf(
+		"outside validity interval: start %d, slot %d",
+		e.ValidityIntervalStart,
+		e.Slot,
+	)
+}

ledger/allegra/rules.go

@@ -0,0 +1,99 @@
+// 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 allegra
+
+import (
+	"fmt"
+
+	"github.com/blinklabs-io/gouroboros/ledger/common"
+	"github.com/blinklabs-io/gouroboros/ledger/shelley"
+)
+
+var UtxoValidationRules = []common.UtxoValidationRuleFunc{
+	UtxoValidateOutsideValidityIntervalUtxo,
+	UtxoValidateInputSetEmptyUtxo,
+	UtxoValidateFeeTooSmallUtxo,
+	UtxoValidateBadInputsUtxo,
+	UtxoValidateWrongNetwork,
+	UtxoValidateWrongNetworkWithdrawal,
+	UtxoValidateValueNotConservedUtxo,
+	UtxoValidateOutputTooSmallUtxo,
+	UtxoValidateOutputBootAddrAttrsTooBig,
+	UtxoValidateMaxTxSizeUtxo,
+}
+
+// UtxoValidateOutsideValidityIntervalUtxo ensures that the current tip slot has reached the specified validity interval
+func UtxoValidateOutsideValidityIntervalUtxo(tx common.Transaction, slot uint64, _ common.LedgerState, _ common.ProtocolParameters) error {
+	validityIntervalStart := tx.ValidityIntervalStart()
+	if validityIntervalStart == 0 || slot >= validityIntervalStart {
+		return nil
+	}
+	return OutsideValidityIntervalUtxoError{
+		ValidityIntervalStart: validityIntervalStart,
+		Slot:                  slot,
+	}
+}
+
+func UtxoValidateInputSetEmptyUtxo(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	return shelley.UtxoValidateInputSetEmptyUtxo(tx, slot, ls, pp)
+}
+
+func UtxoValidateFeeTooSmallUtxo(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	tmpPparams, ok := pp.(*AllegraProtocolParameters)
+	if !ok {
+		return fmt.Errorf("pparams are not expected type")
+	}
+	return shelley.UtxoValidateFeeTooSmallUtxo(tx, slot, ls, &tmpPparams.ShelleyProtocolParameters)
+}
+
+func UtxoValidateBadInputsUtxo(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	return shelley.UtxoValidateBadInputsUtxo(tx, slot, ls, pp)
+}
+
+func UtxoValidateWrongNetwork(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	return shelley.UtxoValidateWrongNetwork(tx, slot, ls, pp)
+}
+
+func UtxoValidateWrongNetworkWithdrawal(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	return shelley.UtxoValidateWrongNetworkWithdrawal(tx, slot, ls, pp)
+}
+
+func UtxoValidateValueNotConservedUtxo(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	tmpPparams, ok := pp.(*AllegraProtocolParameters)
+	if !ok {
+		return fmt.Errorf("pparams are not expected type")
+	}
+	return shelley.UtxoValidateValueNotConservedUtxo(tx, slot, ls, &tmpPparams.ShelleyProtocolParameters)
+}
+
+func UtxoValidateOutputTooSmallUtxo(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	tmpPparams, ok := pp.(*AllegraProtocolParameters)
+	if !ok {
+		return fmt.Errorf("pparams are not expected type")
+	}
+	return shelley.UtxoValidateOutputTooSmallUtxo(tx, slot, ls, &tmpPparams.ShelleyProtocolParameters)
+}
+
+func UtxoValidateOutputBootAddrAttrsTooBig(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	return shelley.UtxoValidateOutputBootAddrAttrsTooBig(tx, slot, ls, pp)
+}
+
+func UtxoValidateMaxTxSizeUtxo(tx common.Transaction, slot uint64, ls common.LedgerState, pp common.ProtocolParameters) error {
+	tmpPparams, ok := pp.(*AllegraProtocolParameters)
+	if !ok {
+		return fmt.Errorf("pparams are not expected type")
+	}
+	return shelley.UtxoValidateMaxTxSizeUtxo(tx, slot, ls, &tmpPparams.ShelleyProtocolParameters)
+}