Fix lint errors (#84)

Remove unnecessary conversions, format import and remove unused struct(SyncErrorCode)

addresshelper/helper.go

@@ -2,6 +2,7 @@ package addresshelper
 
 import (
 	"fmt"
+
 	chaincfg "github.com/decred/dcrd/chaincfg/v2"
 	dcrutil "github.com/decred/dcrd/dcrutil/v2"
 	txscript "github.com/decred/dcrd/txscript/v2"

badgerdb/db.go

@@ -290,7 +290,7 @@ func (b *Bucket) Delete(key []byte) error {
 		return errors.E(errors.Invalid)
 	}
 
-	return convertErr((*Bucket)(b).delete(key))
+	return convertErr(b.delete(key))
 }
 
 func (b *Bucket) ReadCursor() walletdb.ReadCursor {
@@ -584,7 +584,7 @@ func (db *db) beginTx(writable bool) (*transaction, error) {
 		return nil, errors.E(errors.Invalid)
 	}
 
-	tx := (*badger.DB)(db.DB).NewTransaction(writable)
+	tx := db.DB.NewTransaction(writable)
 	tran := &transaction{badgerTx: tx, writable: writable, db: db}
 	return tran, nil
 }
@@ -621,7 +621,7 @@ func (db *db) Close() error {
 
 	time.Sleep(2 * time.Second) // sleep for 2 seconds to ensure any db operation completes before proceeding
 
-	err := (*badger.DB)(db.DB).Close()
+	err := db.DB.Close()
 	if err != nil {
 		return convertErr(err)
 	}
@@ -675,5 +675,5 @@ func openDB(dbPath string, create bool) (walletdb.DB, error) {
 		}()
 	}
 
-	return (*db)(d), convertErr(err)
+	return d, convertErr(err)
 }

sync.go

@@ -60,13 +60,6 @@ type activeSyncData struct {
 	totalInactiveSeconds int64
 }
 
-type SyncErrorCode int32
-
-const (
-	ErrorCodeUnexpectedError SyncErrorCode = iota
-	ErrorCodeDeadlineExceeded
-)
-
 const (
 	InvalidSyncStage          = -1
 	HeadersFetchSyncStage     = 0
@@ -237,9 +230,9 @@ func (mw *MultiWallet) SpvSync() error {
 				mw.notifySyncCanceled()
 				mw.syncData.syncCanceled <- true
 			} else if err == context.DeadlineExceeded {
-				mw.notifySyncError(ErrorCodeDeadlineExceeded, errors.E("SPV synchronization deadline exceeded: %v", err))
+				mw.notifySyncError(errors.E("SPV synchronization deadline exceeded: %v", err))
 			} else {
-				mw.notifySyncError(ErrorCodeUnexpectedError, err)
+				mw.notifySyncError(err)
 			}
 		}
 	}()

syncnotification.go

@@ -474,7 +474,7 @@ func (mw *MultiWallet) estimateBlockHeadersCountAfter(lastHeaderTime int64) int3
 	return int32(math.Ceil(estimatedHeadersDifference))
 }
 
-func (mw *MultiWallet) notifySyncError(code SyncErrorCode, err error) {
+func (mw *MultiWallet) notifySyncError(err error) {
 	mw.resetSyncData()
 
 	mw.syncData.mu.RLock()

ticket.go

@@ -172,7 +172,7 @@ func (wallet *Wallet) TicketPrice(ctx context.Context) (*TicketPriceResponse, er
 	_, tipHeight := wallet.internal.MainChainTip(ctx)
 	return &TicketPriceResponse{
 		TicketPrice: int64(ticketPrice),
-		Height:      int32(tipHeight),
+		Height:      tipHeight,
 	}, nil
 }
 

txparser.go

@@ -2,6 +2,7 @@ package dcrlibwallet
 
 import (
 	"fmt"
+
 	"github.com/decred/dcrd/chaincfg/chainhash"
 	w "github.com/decred/dcrwallet/wallet/v3"
 )
@@ -29,7 +30,7 @@ func (wallet *Wallet) decodeTransactionWithTxSummary(txSummary *w.TransactionSum
 			Index:    int32(input.Index),
 			AmountIn: int64(input.PreviousAmount),
 			WalletAccount: &WalletAccount{
-				AccountNumber: int32(accountNumber),
+				AccountNumber: accountNumber,
 				AccountName:   wallet.AccountName(accountNumber),
 			},
 		}