diff --git a/btc/bip39.go b/btc/bip39.go
index b368176..96f22cc 100644
--- a/btc/bip39.go
+++ b/btc/bip39.go
@@ -6,14 +6,15 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
+	"os"
+	"strings"
+	"syscall"
+
 	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcutil/hdkeychain"
 	"github.com/guggero/chantools/bip39"
 	"golang.org/x/crypto/pbkdf2"
 	"golang.org/x/crypto/ssh/terminal"
-	"os"
-	"strings"
-	"syscall"
 )
 
 const (
diff --git a/cmd/chantools/derivekey.go b/cmd/chantools/derivekey.go
index 3c7a837..2cedd92 100644
--- a/cmd/chantools/derivekey.go
+++ b/cmd/chantools/derivekey.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcutil/hdkeychain"
 	"github.com/guggero/chantools/lnd"
@@ -86,7 +87,7 @@ func deriveKey(extendedKey *hdkeychain.ExtendedKey, path string,
 		return fmt.Errorf("could not create address: %v", err)
 	}
 
-	privKey, xPriv := "n/a", "n/a"
+	privKey, xPriv := na, na
 	if !neuter {
 		privKey, xPriv = wif.String(), child.String()
 	}
@@ -96,7 +97,7 @@ func deriveKey(extendedKey *hdkeychain.ExtendedKey, path string,
 		pubKey.SerializeCompressed(), neutered, addrP2WKH, addrP2PKH,
 		privKey, xPriv,
 	)
-	fmt.Printf(result)
+	fmt.Println(result)
 
 	// For the tests, also log as trace level which is disabled by default.
 	log.Tracef(result)
diff --git a/cmd/chantools/derivekey_test.go b/cmd/chantools/derivekey_test.go
index 3512c33..1b55b70 100644
--- a/cmd/chantools/derivekey_test.go
+++ b/cmd/chantools/derivekey_test.go
@@ -1,11 +1,11 @@
 package main
 
 import (
-	"github.com/guggero/chantools/btc"
-	"github.com/guggero/chantools/lnd"
 	"os"
 	"testing"
 
+	"github.com/guggero/chantools/btc"
+	"github.com/guggero/chantools/lnd"
 	"github.com/stretchr/testify/require"
 )
 
diff --git a/cmd/chantools/forceclose.go b/cmd/chantools/forceclose.go
index 6a24f2a..42de5c2 100644
--- a/cmd/chantools/forceclose.go
+++ b/cmd/chantools/forceclose.go
@@ -20,7 +20,7 @@ import (
 )
 
 type forceCloseCommand struct {
-	ApiURL    string
+	APIURL    string
 	ChannelDB string
 	Publish   bool
 
@@ -54,7 +54,7 @@ blocks) transaction *or* they have a watch tower looking out for them.
 		RunE: cc.Execute,
 	}
 	cc.cmd.Flags().StringVar(
-		&cc.ApiURL, "apiurl", defaultAPIURL, "API URL to use (must "+
+		&cc.APIURL, "apiurl", defaultAPIURL, "API URL to use (must "+
 			"be esplora compatible)",
 	)
 	cc.cmd.Flags().StringVar(
@@ -92,7 +92,7 @@ func (c *forceCloseCommand) Execute(_ *cobra.Command, _ []string) error {
 	if err != nil {
 		return err
 	}
-	return forceCloseChannels(c.ApiURL, extendedKey, entries, db, c.Publish)
+	return forceCloseChannels(c.APIURL, extendedKey, entries, db, c.Publish)
 }
 
 func forceCloseChannels(apiURL string, extendedKey *hdkeychain.ExtendedKey,
diff --git a/cmd/chantools/rescuefunding.go b/cmd/chantools/rescuefunding.go
index f9ea9cc..787f09b 100644
--- a/cmd/chantools/rescuefunding.go
+++ b/cmd/chantools/rescuefunding.go
@@ -147,10 +147,6 @@ func (c *rescueFundingCommand) Execute(_ *cobra.Command, _ []string) error {
 		return fmt.Errorf("error parsing sweep addr: %v", err)
 	}
 
-	if c.FeeRate < 0 {
-		return fmt.Errorf("satperbyte must be greater than 0")
-	}
-
 	return rescueFunding(
 		db, signer, dbOp, chainOp, sweepScript,
 		btcutil.Amount(c.FeeRate),
diff --git a/cmd/chantools/root.go b/cmd/chantools/root.go
index 7aced74..587a26d 100644
--- a/cmd/chantools/root.go
+++ b/cmd/chantools/root.go
@@ -5,7 +5,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"github.com/guggero/chantools/btc"
 	"io/ioutil"
 	"os"
 	"strings"
@@ -15,6 +14,7 @@ import (
 	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btclog"
 	"github.com/btcsuite/btcutil/hdkeychain"
+	"github.com/guggero/chantools/btc"
 	"github.com/guggero/chantools/dataformat"
 	"github.com/guggero/chantools/lnd"
 	"github.com/lightningnetwork/lnd/build"
@@ -27,6 +27,7 @@ import (
 const (
 	defaultAPIURL = "https://blockstream.info/api"
 	version       = "0.8.0"
+	na            = "n/a"
 
 	Commit = ""
 )
@@ -67,7 +68,7 @@ Complete documentation is available at https://github.com/guggero/chantools/.`,
 	DisableAutoGenTag: true,
 }
 
-func init() {
+func main() {
 	rootCmd.PersistentFlags().BoolVarP(
 		&Testnet, "testnet", "t", false, "Indicates if testnet "+
 			"parameters should be used",
@@ -100,9 +101,7 @@ func init() {
 		newVanityGenCommand(),
 		newWalletInfoCommand(),
 	)
-}
 
-func main() {
 	if err := rootCmd.Execute(); err != nil {
 		_, _ = fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
diff --git a/cmd/chantools/root_test.go b/cmd/chantools/root_test.go
index afb8ba6..5122aba 100644
--- a/cmd/chantools/root_test.go
+++ b/cmd/chantools/root_test.go
@@ -2,7 +2,6 @@ package main
 
 import (
 	"bytes"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"path"
@@ -36,9 +35,9 @@ const (
 
 var (
 	datePattern = regexp.MustCompile(
-		"\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}\\.\\d{3} ",
+		`\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3} `,
 	)
-	addressPattern = regexp.MustCompile("\\(0x[0-9a-f]{10}\\)")
+	addressPattern = regexp.MustCompile(`\(0x[0-9a-f]{10}\)`)
 )
 
 type harness struct {
@@ -80,10 +79,10 @@ func (h *harness) clearLog() {
 	h.logBuffer.Reset()
 }
 
-func (h *harness) assertLogContains(format string, args ...interface{}) {
+func (h *harness) assertLogContains(format string) {
 	h.t.Helper()
 
-	require.Contains(h.t, h.logBuffer.String(), fmt.Sprintf(format, args...))
+	require.Contains(h.t, h.logBuffer.String(), format)
 }
 
 func (h *harness) assertLogEqual(a, b string) {
diff --git a/cmd/chantools/showrootkey.go b/cmd/chantools/showrootkey.go
index d2894ec..8a418da 100644
--- a/cmd/chantools/showrootkey.go
+++ b/cmd/chantools/showrootkey.go
@@ -40,7 +40,7 @@ func (c *showRootKeyCommand) Execute(_ *cobra.Command, _ []string) error {
 	}
 
 	result := fmt.Sprintf(showRootKeyFormat, extendedKey)
-	fmt.Printf(result)
+	fmt.Println(result)
 
 	// For the tests, also log as trace level which is disabled by default.
 	log.Tracef(result)
diff --git a/cmd/chantools/showrootkey_test.go b/cmd/chantools/showrootkey_test.go
index fb7b892..c4704f2 100644
--- a/cmd/chantools/showrootkey_test.go
+++ b/cmd/chantools/showrootkey_test.go
@@ -1,10 +1,10 @@
 package main
 
 import (
-	"github.com/guggero/chantools/btc"
 	"os"
 	"testing"
 
+	"github.com/guggero/chantools/btc"
 	"github.com/guggero/chantools/lnd"
 	"github.com/stretchr/testify/require"
 )
@@ -64,4 +64,4 @@ func TestShowRootKeyBIP39WithPassphre(t *testing.T) {
 	require.NoError(t, err)
 
 	h.assertLogContains(rootKeyBip39Passphrase)
-}
\ No newline at end of file
+}
diff --git a/cmd/chantools/summary.go b/cmd/chantools/summary.go
index 8415049..2e355ad 100644
--- a/cmd/chantools/summary.go
+++ b/cmd/chantools/summary.go
@@ -12,7 +12,7 @@ import (
 )
 
 type summaryCommand struct {
-	ApiURL string
+	APIURL string
 
 	inputs *inputFlags
 	cmd    *cobra.Command
@@ -32,7 +32,7 @@ chantools summary --fromchanneldb ~/.lnd/data/graph/mainnet/channel.db`,
 		RunE: cc.Execute,
 	}
 	cc.cmd.Flags().StringVar(
-		&cc.ApiURL, "apiurl", defaultAPIURL, "API URL to use (must "+
+		&cc.APIURL, "apiurl", defaultAPIURL, "API URL to use (must "+
 			"be esplora compatible)",
 	)
 
@@ -47,7 +47,7 @@ func (c *summaryCommand) Execute(_ *cobra.Command, _ []string) error {
 	if err != nil {
 		return err
 	}
-	return summarizeChannels(c.ApiURL, entries)
+	return summarizeChannels(c.APIURL, entries)
 }
 
 func summarizeChannels(apiURL string,
diff --git a/cmd/chantools/sweeptimelock.go b/cmd/chantools/sweeptimelock.go
index 4a28ec1..afddd2e 100644
--- a/cmd/chantools/sweeptimelock.go
+++ b/cmd/chantools/sweeptimelock.go
@@ -24,7 +24,7 @@ const (
 )
 
 type sweepTimeLockCommand struct {
-	ApiURL      string
+	APIURL      string
 	Publish     bool
 	SweepAddr   string
 	MaxCsvLimit uint16
@@ -55,7 +55,7 @@ parameter to 144.`,
 		RunE: cc.Execute,
 	}
 	cc.cmd.Flags().StringVar(
-		&cc.ApiURL, "apiurl", defaultAPIURL, "API URL to use (must "+
+		&cc.APIURL, "apiurl", defaultAPIURL, "API URL to use (must "+
 			"be esplora compatible)",
 	)
 	cc.cmd.Flags().BoolVar(
@@ -105,7 +105,7 @@ func (c *sweepTimeLockCommand) Execute(_ *cobra.Command, _ []string) error {
 		c.FeeRate = defaultFeeSatPerVByte
 	}
 	return sweepTimeLock(
-		extendedKey, c.ApiURL, entries, c.SweepAddr, c.MaxCsvLimit,
+		extendedKey, c.APIURL, entries, c.SweepAddr, c.MaxCsvLimit,
 		c.Publish, c.FeeRate,
 	)
 }
diff --git a/cmd/chantools/sweeptimelockmanual.go b/cmd/chantools/sweeptimelockmanual.go
index 5d88690..a438ae8 100644
--- a/cmd/chantools/sweeptimelockmanual.go
+++ b/cmd/chantools/sweeptimelockmanual.go
@@ -26,7 +26,7 @@ const (
 )
 
 type sweepTimeLockManualCommand struct {
-	ApiURL                    string
+	APIURL                    string
 	Publish                   bool
 	SweepAddr                 string
 	MaxCsvLimit               uint16
@@ -65,7 +65,7 @@ address is always the one that's longer (because it's P2WSH and not P2PKH).`,
 		RunE: cc.Execute,
 	}
 	cc.cmd.Flags().StringVar(
-		&cc.ApiURL, "apiurl", defaultAPIURL, "API URL to use (must "+
+		&cc.APIURL, "apiurl", defaultAPIURL, "API URL to use (must "+
 			"be esplora compatible)",
 	)
 	cc.cmd.Flags().BoolVar(
@@ -122,7 +122,7 @@ func (c *sweepTimeLockManualCommand) Execute(_ *cobra.Command, _ []string) error
 	}
 
 	return sweepTimeLockManual(
-		extendedKey, c.ApiURL, c.SweepAddr, c.TimeLockAddr,
+		extendedKey, c.APIURL, c.SweepAddr, c.TimeLockAddr,
 		remoteRevPoint, c.MaxCsvLimit, c.Publish, c.FeeRate,
 	)
 }
diff --git a/cmd/chantools/walletinfo.go b/cmd/chantools/walletinfo.go
index dbcdd29..16fe078 100644
--- a/cmd/chantools/walletinfo.go
+++ b/cmd/chantools/walletinfo.go
@@ -163,7 +163,7 @@ func (c *walletInfoCommand) Execute(_ *cobra.Command, _ []string) error {
 	if err != nil {
 		return err
 	}
-	rootKey := "n/a"
+	rootKey := na
 	if c.WithRootKey {
 		masterHDPrivKey, err := decryptRootKey(db, privateWalletPw)
 		if err != nil {
@@ -177,7 +177,7 @@ func (c *walletInfoCommand) Execute(_ *cobra.Command, _ []string) error {
 		scopeInfo,
 	)
 
-	fmt.Printf(result)
+	fmt.Println(result)
 
 	// For the tests, also log as trace level which is disabled by default.
 	log.Tracef(result)
diff --git a/go.mod b/go.mod
index 6038461..15d0550 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/coreos/bbolt v1.3.3
 	github.com/davecgh/go-spew v1.1.1
 	github.com/gohugoio/hugo v0.79.1 // indirect
-	github.com/jessevdk/go-flags v1.4.0
+	github.com/jessevdk/go-flags v1.4.0 // indirect
 	github.com/lightningnetwork/lnd v0.11.1-beta
 	github.com/ltcsuite/ltcd v0.0.0-20191228044241-92166e412499 // indirect
 	github.com/miekg/dns v1.1.26 // indirect