multi: update RPC error import path

These errors are now defined in `btcwallet/chain` instead of
`btcd/rpcclient`.

lnwallet/btcwallet/btcwallet.go

@@ -1202,15 +1202,15 @@ func mapRpcclientError(err error) error {
 	switch {
 	// If the wallet reports a double spend, convert it to our internal
 	// ErrDoubleSpend and return.
-	case errors.Is(err, rpcclient.ErrMempoolConflict),
-		errors.Is(err, rpcclient.ErrMissingInputs):
+	case errors.Is(err, chain.ErrMempoolConflict),
+		errors.Is(err, chain.ErrMissingInputs):
 
 		return lnwallet.ErrDoubleSpend
 
 	// If the wallet reports that fee requirements for accepting the tx
 	// into mempool are not met, convert it to our internal ErrMempoolFee
 	// and return.
-	case errors.Is(err, rpcclient.ErrMempoolMinFeeNotMet):
+	case errors.Is(err, chain.ErrMempoolMinFeeNotMet):
 		return fmt.Errorf("%w: %v", lnwallet.ErrMempoolFee, err.Error())
 	}
 
@@ -1295,9 +1295,9 @@ func (b *BtcWallet) PublishTransaction(tx *wire.MsgTx, label string) error {
 	// `PublishTransaction` again because we need to mark the label in the
 	// wallet. We can remove this exception once we have the above TODO
 	// fixed.
-	case errors.Is(err, rpcclient.ErrTxAlreadyInMempool),
-		errors.Is(err, rpcclient.ErrTxAlreadyKnown),
-		errors.Is(err, rpcclient.ErrTxAlreadyConfirmed):
+	case errors.Is(err, chain.ErrTxAlreadyInMempool),
+		errors.Is(err, chain.ErrTxAlreadyKnown),
+		errors.Is(err, chain.ErrTxAlreadyConfirmed):
 
 		err := b.wallet.PublishTransaction(tx, label)
 		return mapRpcclientError(err)

lnwallet/btcwallet/btcwallet_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/btcsuite/btcwallet/wallet"
 	"github.com/lightningnetwork/lnd/lnmock"
 	"github.com/lightningnetwork/lnd/lnwallet"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 )
 
@@ -204,10 +205,12 @@ func TestCheckMempoolAcceptance(t *testing.T) {
 	}}
 	mockChain.On("TestMempoolAccept", []*wire.MsgTx{tx}, maxFeeRate).Return(
 		results, nil).Once()
+	mockChain.On("MapRPCErr", mock.Anything).Return(
+		chain.ErrInsufficientFee).Once()
 
 	// Now call the method under test.
 	err = wallet.CheckMempoolAcceptance(tx)
-	rt.ErrorIs(err, rpcclient.ErrInsufficientFee)
+	rt.ErrorIs(err, chain.ErrInsufficientFee)
 
 	// Assert that when the tx is accepted, no error is returned.
 	//

lnwallet/test/test_interface.go

@@ -1808,7 +1808,7 @@ func testPublishTransaction(r *rpctest.Harness,
 			// If RBF is enabled, we expect it to be rejected
 			// because it doesn't pay enough fees.
 			if rbf {
-				expectedErr = rpcclient.ErrInsufficientFee
+				expectedErr = chain.ErrInsufficientFee
 			}
 
 			// Assert the expected error.
@@ -1891,7 +1891,7 @@ func testPublishTransaction(r *rpctest.Harness,
 		// Now broadcast the transaction, we should get an error that
 		// the weight is too large.
 		err := alice.PublishTransaction(testTx, labels.External)
-		require.ErrorIs(t, err, rpcclient.ErrOversizeTx)
+		require.ErrorIs(t, err, chain.ErrOversizeTx)
 	})
 }