fix: set wallet fee

config/config.go

@@ -33,9 +33,10 @@ type Database struct {
 }
 
 type Wallet struct {
-	Address  string `yaml:"address"`
-	Path     string `yaml:"path"`
-	Password string `yaml:"password"`
+	Address  string        `yaml:"address"`
+	Path     string        `yaml:"path"`
+	Password string        `yaml:"password"`
+	Fee      amount.Amount `yaml:"fee"`
 }
 
 type DiscordBot struct {

config/config.sample.yml

@@ -34,6 +34,9 @@ wallet:
   # Password for the wallet file.
   password:
 
+  # The fee to be paid for each transaction sent by Pagu.
+  fee: 0.01
+
 # Phoenix (TestNet) configuration
 phoenix:
   # Number of coins to send when the faucet is used.

pkg/wallet/wallet.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 
 	"github.com/pactus-project/pactus/genesis"
-	"github.com/pactus-project/pactus/types/tx/payload"
 	"github.com/pactus-project/pactus/wallet"
 	"github.com/pagu-project/pagu/config"
 	"github.com/pagu-project/pagu/pkg/amount"
@@ -16,6 +15,7 @@ type Wallet struct {
 
 	address  string
 	password string
+	fee      amount.Amount
 }
 
 func Open(cfg *config.Wallet) (*Wallet, error) {
@@ -28,11 +28,13 @@ func Open(cfg *config.Wallet) (*Wallet, error) {
 		Wallet:   wlt,
 		address:  cfg.Address,
 		password: cfg.Password,
+		fee:      cfg.Fee,
 	}, nil
 }
 
 func (w *Wallet) BondTransaction(pubKey, toAddress, memo string, amt amount.Amount) (string, error) {
 	opts := []wallet.TxOption{
+		wallet.OptionFee(w.fee.ToPactusAmount()),
 		wallet.OptionMemo(memo),
 	}
 	tx, err := w.Wallet.MakeBondTx(w.address, toAddress, pubKey, amt.ToPactusAmount(), opts...)
@@ -70,16 +72,8 @@ func (w *Wallet) BondTransaction(pubKey, toAddress, memo string, amt amount.Amou
 }
 
 func (w *Wallet) TransferTransaction(toAddress, memo string, amt amount.Amount) (string, error) {
-	// calculate fee using amount struct.
-	fee, err := w.Wallet.CalculateFee(amt.ToPactusAmount(), payload.TypeTransfer)
-	if err != nil {
-		log.Error("error calculating fee", "err", err, "client")
-
-		return "", err
-	}
-
 	opts := []wallet.TxOption{
-		wallet.OptionFee(fee),
+		wallet.OptionFee(w.fee.ToPactusAmount()),
 		wallet.OptionMemo(memo),
 	}