chore(*): minor cleanup (#37)

rm unused code

btcclient/client_wallet.go

@@ -93,11 +93,7 @@ func (c *Client) WalletPassphrase(passphrase string, timeoutSecs int64) error {
 	return c.Client.WalletPassphrase(passphrase, timeoutSecs)
 }
 
-func (c *Client) DumpPrivKey(address btcutil.Address) (*btcutil.WIF, error) {
-	return c.Client.DumpPrivKey(address)
-}
-
-// GetHighUTXO returns the UTXO that has the highest amount
+// GetHighUTXOAndSum returns the UTXO that has the highest amount
 func (c *Client) GetHighUTXOAndSum() (*btcjson.ListUnspentResult, float64, error) {
 	utxos, err := c.ListUnspent()
 	if err != nil {
@@ -118,11 +114,6 @@ func (c *Client) GetHighUTXOAndSum() (*btcjson.ListUnspentResult, float64, error
 	return &highUTXO, sum, nil
 }
 
-// CalculateTxFee calculates tx fee based on the given fee rate (BTC/kB) and the tx size
-func CalculateTxFee(feeRateAmount btcutil.Amount, size uint64) (uint64, error) {
-	return uint64(feeRateAmount.MulF64(float64(size) / 1024)), nil
-}
-
 func (c *Client) FundRawTransaction(tx *wire.MsgTx, opts btcjson.FundRawTransactionOpts, isWitness *bool) (*btcjson.FundRawTransactionResult, error) {
 	return c.Client.FundRawTransaction(tx, opts, isWitness)
 }

config/config.go

@@ -10,7 +10,6 @@ import (
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
-	"gopkg.in/yaml.v2"
 )
 
 const (
@@ -132,17 +131,3 @@ func New(configFile string) (Config, error) {
 		return Config{}, err
 	}
 }
-
-func WriteSample() error {
-	cfg := DefaultConfig()
-	d, err := yaml.Marshal(&cfg)
-	if err != nil {
-		return err
-	}
-	// write to file
-	err = os.WriteFile("./sample-vigilante.yml", d, 0644)
-	if err != nil {
-		return err
-	}
-	return nil
-}