chore: fix some comments (#2146)

Signed-off-by: xiaoxiangxianzi <zhaoyizheng@outlook.com>

blockchain/chain.go

@@ -773,7 +773,7 @@ func (b *BlockChain) disconnectBlock(node *blockNode, block *btcutil.Block, view
 		// Flush the cache on every disconnect.  Since the code for
 		// reorganization modifies the database directly, the cache
 		// will be left in an inconsistent state if we don't flush it
-		// prior to the dbPutUtxoView that happends below.
+		// prior to the dbPutUtxoView that happens below.
 		err = b.utxoCache.flush(dbTx, FlushRequired, state)
 		if err != nil {
 			return err

btcutil/gcs/builder/builder.go

@@ -207,7 +207,7 @@ func (b *GCSBuilder) Build() (*gcs.Filter, error) {
 		return nil, b.err
 	}
 
-	// We'll ensure that all the paramaters we need to actually build the
+	// We'll ensure that all the parameters we need to actually build the
 	// filter properly are set.
 	if b.p == 0 {
 		return nil, fmt.Errorf("p value is not set, cannot build")

btcutil/psbt/creator.go

@@ -17,7 +17,7 @@ const MinTxVersion = 1
 // within the unsigned transaction.  The values of nLockTime, nSequence (per
 // input) and transaction version (must be 1 of 2) must be specified here. Note
 // that the default nSequence value is wire.MaxTxInSequenceNum.  Referencing
-// the PSBT BIP, this function serves the roles of teh Creator.
+// the PSBT BIP, this function serves the roles of the Creator.
 func New(inputs []*wire.OutPoint,
 	outputs []*wire.TxOut, version int32, nLockTime uint32,
 	nSequences []uint32) (*Packet, error) {

btcutil/psbt/utils.go

@@ -226,7 +226,7 @@ func serializeKVPairWithType(w io.Writer, kt uint8, keydata []byte,
 
 // getKey retrieves a single key - both the key type and the keydata (if
 // present) from the stream and returns the key type as an integer, or -1 if
-// the key was of zero length. This integer is is used to indicate the presence
+// the key was of zero length. This integer is used to indicate the presence
 // of a separator byte which indicates the end of a given key-value pair list,
 // and the keydata as a byte slice or nil if none is present.
 func getKey(r io.Reader) (int, []byte, error) {

mempool/mempool.go

@@ -1635,7 +1635,7 @@ func (mp *TxPool) validateStandardness(tx *btcutil.Tx, nextBlockHeight int32,
 }
 
 // validateSigCost checks the cost to run the signature operations to make sure
-// the number of singatures are sane.
+// the number of signatures are sane.
 func (mp *TxPool) validateSigCost(tx *btcutil.Tx,
 	utxoView *blockchain.UtxoViewpoint) error {
 

netsync/manager.go

@@ -1136,7 +1136,7 @@ func (sm *SyncManager) haveInventory(invVect *wire.InvVect) (bool, error) {
 		return false, nil
 	}
 
-	// The requested inventory is is an unsupported type, so just claim
+	// The requested inventory is an unsupported type, so just claim
 	// it is known to avoid requesting it.
 	return true, nil
 }

rpcwebsocket.go

@@ -228,7 +228,7 @@ func (m *wsNotificationManager) NotifyBlockDisconnected(block *btcutil.Block) {
 
 // NotifyMempoolTx passes a transaction accepted by mempool to the
 // notification manager for transaction notification processing.  If
-// isNew is true, the tx is is a new transaction, rather than one
+// isNew is true, the tx is a new transaction, rather than one
 // added to the mempool during a reorg.
 func (m *wsNotificationManager) NotifyMempoolTx(tx *btcutil.Tx, isNew bool) {
 	n := &notificationTxAcceptedByMempool{