adjust timeout refund tx

Author: keithsue

x/lending/keeper/dlc.go

@@ -106,7 +106,7 @@ func (k Keeper) UpdateDLCMeta(ctx sdk.Context, loanId string, depositTxs []*psbt
 	}
 
 	// timeout refund transaction can be generated offchain as needed
-	timeoutRefundTx, err := types.CreateTimeoutRefundTransaction(depositTxs, vaultPkScript, borrowerPkScript, internalKey, dlcMeta.TimeoutRefundScript, feeRate.Value)
+	timeoutRefundTx, err := types.CreateTimeoutRefundTransaction(depositTxs, vaultPkScript, borrowerPkScript, internalKey, dlcMeta.TimeoutRefundScript, loan.FinalTimeout, feeRate.Value)
 	if err != nil {
 		return err
 	}

x/lending/types/bitcoin.go

@@ -17,6 +17,9 @@ const (
 
 	// default maximum allowed transaction weight
 	MaxTransactionWeight = 400000
+
+	// default sequence
+	DefaultSequence = wire.MaxTxInSequenceNum - 1
 )
 
 // BuildPsbt builds a psbt from the given params
@@ -84,6 +87,7 @@ func AddUTXOToTx(tx *wire.MsgTx, utxo *btcbridgetypes.UTXO) {
 	}
 
 	txIn.PreviousOutPoint = *wire.NewOutPoint(hash, uint32(utxo.Vout))
+	txIn.Sequence = DefaultSequence
 
 	tx.AddTxIn(txIn)
 }

x/lending/types/dlc.go

@@ -295,7 +295,7 @@ func VerifyRepaymentCet(dlcMeta *DLCMeta, depositTxs []*psbt.Packet, vaultPkScri
 }
 
 // CreateTimeoutRefundTransaction creates the timeout refund tx
-func CreateTimeoutRefundTransaction(depositTxs []*psbt.Packet, vaultPkScript []byte, borrowerPkScript []byte, internalKeyBytes []byte, leafScript LeafScript, feeRate int64) (string, error) {
+func CreateTimeoutRefundTransaction(depositTxs []*psbt.Packet, vaultPkScript []byte, borrowerPkScript []byte, internalKeyBytes []byte, leafScript LeafScript, lockTime int64, feeRate int64) (string, error) {
 	vaultUtxos, err := GetVaultUtxos(depositTxs, vaultPkScript)
 	if err != nil {
 		return "", err
@@ -311,6 +311,8 @@ func CreateTimeoutRefundTransaction(depositTxs []*psbt.Packet, vaultPkScript []b
 		return "", err
 	}
 
+	p.UnsignedTx.LockTime = uint32(lockTime)
+
 	for i := range p.Inputs {
 		p.Inputs[i].SighashType = DefaultSigHashType
 		p.Inputs[i].TaprootInternalKey = internalKeyBytes

x/liquidation/types/bitcoin.go

@@ -23,6 +23,9 @@ const (
 
 	// default sig hash type
 	DefaultSigHashType = txscript.SigHashDefault
+
+	// default sequence
+	DefaultSequence = wire.MaxTxInSequenceNum - 1
 )
 
 // BuildSettlementTransaction builds the settlement tx for the given liquidation and records
@@ -189,6 +192,7 @@ func AddUTXOToTx(tx *wire.MsgTx, utxo *btcbridgetypes.UTXO) {
 	}
 
 	txIn.PreviousOutPoint = *wire.NewOutPoint(hash, uint32(utxo.Vout))
+	txIn.Sequence = DefaultSequence
 
 	tx.AddTxIn(txIn)
 }