Change fee rate type

proto/side/btcbridge/tx.proto

@@ -96,7 +96,7 @@ message MsgWithdrawBitcoinRequest {
   // withdraw amount in satoshi, etc: 100000000sat = 1btc
   string amount = 2;
   // fee rate in sats/vB
-  int64 fee_rate = 3;
+  string fee_rate = 3;
 }
 
 // MsgWithdrawBitcoinResponse defines the Msg/WithdrawBitcoin response type.

x/btcbridge/client/cli/tx.go

@@ -4,7 +4,6 @@
 	"encoding/json"
 	"fmt"
 	"os"
-	"strconv"
 	"strings"
 	"time"
 
@@ -51,7 +50,7 @@
 		Short: "Submit Bitcoin block headers to the chain",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) (err error) {
 
 			clientCtx, err := client.GetClientTxContext(cmd)
 			if err != nil {
 				return err
@@ -130,15 +129,10 @@
 				return fmt.Errorf("invalid amount")
 			}
 
-			feeRate, err := strconv.ParseInt(args[1], 10, 64)
-			if err != nil {
-				return fmt.Errorf("invalid fee rate")
-			}
-
 			msg := types.NewMsgWithdrawBitcoinRequest(
 				clientCtx.GetFromAddress().String(),
 				args[0],
-				feeRate,
+				args[1],
 			)
 
 			if err := msg.ValidateBasic(); err != nil {

x/btcbridge/keeper/msg_server.go

@@ -4,6 +4,7 @@
 	"bytes"
 	"context"
 	"encoding/base64"
+	"strconv"
 
 	"github.com/btcsuite/btcd/btcutil/psbt"
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -72,7 +73,7 @@
 	)
 
 	return &types.MsgSubmitDepositTransactionResponse{}, nil
 
 }
 
 // SubmitTransaction implements types.MsgServer.
@@ -101,7 +102,7 @@
 	)
 
 	return &types.MsgSubmitWithdrawTransactionResponse{}, nil
 
 }
 
 // UpdateSenders implements types.MsgServer.
@@ -142,7 +143,12 @@
 		return nil, err
 	}
 
-	req, err := m.Keeper.NewSigningRequest(ctx, msg.Sender, coin, msg.FeeRate, "")
+	feeRate, err := strconv.ParseInt(msg.FeeRate, 10, 64)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := m.Keeper.NewSigningRequest(ctx, msg.Sender, coin, feeRate, "")
 	if err != nil {
 		return nil, err
 	}
@@ -200,7 +206,7 @@
 	m.SetSigningRequest(ctx, request)
 
 	return &types.MsgSubmitWithdrawSignaturesResponse{}, nil
 
 }
 
 func (m msgServer) SubmitWithdrawStatus(goCtx context.Context, msg *types.MsgSubmitWithdrawStatusRequest) (*types.MsgSubmitWithdrawStatusResponse, error) {

x/btcbridge/types/message_withdraw_bitcoin.go

@@ -1,6 +1,8 @@
 package types
 
 import (
+	"strconv"
+
 	sdkerrors "cosmossdk.io/errors"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
@@ -10,7 +12,7 @@ const TypeMsgWithdrawBitcoin = "withdraw_bitcoin"
 func NewMsgWithdrawBitcoinRequest(
 	sender string,
 	amount string,
-	feeRate int64,
+	feeRate string,
 ) *MsgWithdrawBitcoinRequest {
 	return &MsgWithdrawBitcoinRequest{
 		Sender:  sender,
@@ -56,7 +58,12 @@ func (msg *MsgWithdrawBitcoinRequest) ValidateBasic() error {
 		return err
 	}
 
-	if msg.FeeRate <= 0 {
+	feeRate, err := strconv.ParseInt(msg.FeeRate, 10, 64)
+	if err != nil {
+		return err
+	}
+
+	if feeRate <= 0 {
 		return sdkerrors.Wrap(ErrInvalidFeeRate, "fee rate must be greater than zero")
 	}