multi: fix linter issues

.golangci.yml

@@ -2,10 +2,6 @@ run:
   # timeout for analysis
   deadline: 4m
 
-  # Linting uses a lot of memory. Keep it under control by only running a single
-  # worker.
-  concurrency: 1
-
 linters-settings:
   govet:
     # Don't report about shadowed variables

bip39/bip39.go

@@ -66,7 +66,7 @@ func EntropyFromMnemonic(mnemonic string) ([]byte, error) {
 	b := big.NewInt(0)
 	for _, v := range mnemonicSlice {
 		index, found := wordMap[v]
-		if found == false {
+		if !found {
 			return nil, fmt.Errorf("word `%v` not found in "+
 				"reverse map", v)
 		}
@@ -106,7 +106,7 @@ func EntropyFromMnemonic(mnemonic string) ([]byte, error) {
 
 func computeChecksum(data []byte) []byte {
 	hasher := sha256.New()
-	hasher.Write(data)
+	_, _ = hasher.Write(data)
 	return hasher.Sum(nil)
 }
 

bip39/wordlist_english.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 )
 
-func init() {
+func init() { //nolint:gochecknoinits
 	// Ensure word list is correct
 	// $ wget https://raw.githubusercontent.com/bitcoin/bips/master/bip-0039/english.txt
 	// $ crc32 english.txt

btc/bitcoind.go

@@ -2,12 +2,12 @@ package btc
 
 import (
 	"fmt"
-	"github.com/btcsuite/btcd/wire"
 	"io"
 	"time"
 
 	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcd/txscript"
+	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcutil/hdkeychain"
 	"github.com/guggero/chantools/lnd"

btc/fasthd/extendedkey.go

@@ -16,8 +16,7 @@ import (
 )
 
 const (
-	HardenedKeyStart = 0x80000000              // 2^31
-	serializedKeyLen = 4 + 1 + 4 + 4 + 32 + 33 // 78 bytes
+	HardenedKeyStart = 0x80000000 // 2^31
 	keyLen           = 33
 )
 
@@ -50,7 +49,7 @@ func (k *FastDerivation) Child(i uint32) error {
 	binary.BigEndian.PutUint32(k.scratch[keyLen:], i)
 
 	hmac512 := hmac.New(sha512.New, k.chainCode)
-	hmac512.Write(k.scratch[:])
+	_, _ = hmac512.Write(k.scratch[:])
 	ilr := hmac512.Sum(nil)
 
 	il := ilr[:len(ilr)/2]
@@ -84,7 +83,7 @@ func NewFastDerivation(seed []byte, net *chaincfg.Params) (*FastDerivation, erro
 	// First take the HMAC-SHA512 of the master key and the seed data:
 	//   I = HMAC-SHA512(Key = "Bitcoin seed", Data = S)
 	hmac512 := hmac.New(sha512.New, masterKey)
-	hmac512.Write(seed)
+	_, _ = hmac512.Write(seed)
 	lr := hmac512.Sum(nil)
 
 	// Split "I" into two 32-byte sequences Il and Ir where:

cmd/chantools/derivekey.go

@@ -2,10 +2,10 @@ package main
 
 import (
 	"fmt"
-	"github.com/btcsuite/btcutil"
-	"github.com/guggero/chantools/btc"
 
+	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcutil/hdkeychain"
+	"github.com/guggero/chantools/btc"
 	"github.com/guggero/chantools/lnd"
 )
 

cmd/chantools/signrescuefunding.go

@@ -3,12 +3,12 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"github.com/btcsuite/btcd/btcec"
-	"github.com/btcsuite/btcutil/psbt"
-	"github.com/lightningnetwork/lnd/keychain"
 
+	"github.com/btcsuite/btcd/btcec"
 	"github.com/btcsuite/btcutil/hdkeychain"
+	"github.com/btcsuite/btcutil/psbt"
 	"github.com/guggero/chantools/lnd"
+	"github.com/lightningnetwork/lnd/keychain"
 )
 
 type signRescueFundingCommand struct {

cmd/chantools/sweeptimelock.go

@@ -4,9 +4,8 @@ import (
 	"bytes"
 	"encoding/hex"
 	"fmt"
-	"github.com/btcsuite/btcd/btcec"
-	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 
+	"github.com/btcsuite/btcd/btcec"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
@@ -15,6 +14,7 @@ import (
 	"github.com/guggero/chantools/dataformat"
 	"github.com/guggero/chantools/lnd"
 	"github.com/lightningnetwork/lnd/input"
+	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 )
 
 const (

lnd/aezeed.go

@@ -21,7 +21,7 @@ const (
 )
 
 var (
-	numberDotsRegex = regexp.MustCompile("[\\d.\\-\\n\\r\\t]*")
+	numberDotsRegex = regexp.MustCompile(`[\d.\-\n\r\t]*`)
 	multipleSpaces  = regexp.MustCompile(" [ ]+")
 )
 

lnd/hdkeychain.go

@@ -2,17 +2,17 @@ package lnd
 
 import (
 	"fmt"
-	"github.com/btcsuite/btcd/chaincfg/chainhash"
-	"github.com/btcsuite/btcd/txscript"
-	"github.com/lightningnetwork/lnd/shachain"
 	"strconv"
 	"strings"
 
 	"github.com/btcsuite/btcd/btcec"
 	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcutil/hdkeychain"
 	"github.com/lightningnetwork/lnd/keychain"
+	"github.com/lightningnetwork/lnd/shachain"
 )
 
 const (

lnd/signer.go

@@ -2,6 +2,7 @@ package lnd
 
 import (
 	"fmt"
+
 	"github.com/btcsuite/btcd/btcec"
 	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcd/txscript"