Add MinFeePerTx argument to start-daemon

cmd/kaspawallet/config.go

@@ -1,9 +1,10 @@
 package main
 
 import (
+	"os"
+
 	"github.com/kaspanet/kaspad/infrastructure/config"
 	"github.com/pkg/errors"
-	"os"
 
 	"github.com/jessevdk/go-flags"
 )
@@ -121,6 +122,7 @@ type startDaemonConfig struct {
 	Listen      string `long:"listen" short:"l" description:"Address to listen on (default: 0.0.0.0:8082)"`
 	Timeout     uint32 `long:"wait-timeout" short:"w" description:"Waiting timeout for RPC calls, seconds (default: 30 s)"`
 	Profile     string `long:"profile" description:"Enable HTTP profiling on given port -- NOTE port must be between 1024 and 65536"`
+	MinFeePerTx uint64 `long:"min-fee-per-tx" description:"Minimum fee per transaction (in sompis) (default: 0)"`
 	config.NetworkFlags
 }
 

cmd/kaspawallet/daemon/server/create_unsigned_transaction.go

@@ -126,6 +126,10 @@ func (s *server) selectUTXOs(spendAmount uint64, isSendAll bool, feePerInput uin
 		totalValue += utxo.UTXOEntry.Amount()
 
 		fee := feePerInput * uint64(len(selectedUTXOs))
+		if fee < s.minFeePerTx {
+			fee = s.minFeePerTx
+		}
+
 		totalSpend := spendAmount + fee
 		// Two break cases (if not send all):
 		// 		1. totalValue == totalSpend, so there's no change needed -> number of outputs = 1, so a single input is sufficient
@@ -138,6 +142,10 @@ func (s *server) selectUTXOs(spendAmount uint64, isSendAll bool, feePerInput uin
 	}
 
 	fee := feePerInput * uint64(len(selectedUTXOs))
+	if fee < s.minFeePerTx {
+		fee = s.minFeePerTx
+	}
+
 	var totalSpend uint64
 	if isSendAll {
 		totalSpend = totalValue

cmd/kaspawallet/daemon/server/server.go

@@ -34,6 +34,7 @@ type server struct {
 	backgroundRPCClient *rpcclient.RPCClient // RPC client dedicated for address and UTXO background fetching
 	params              *dagconfig.Params
 	coinbaseMaturity    uint64 // Is different from default if we use testnet-11
+	minFeePerTx         uint64
 
 	lock                            sync.RWMutex
 	utxosSortedByAmount             []*walletUTXO
@@ -57,7 +58,7 @@ type server struct {
 const MaxDaemonSendMsgSize = 100_000_000
 
 // Start starts the kaspawalletd server
-func Start(params *dagconfig.Params, listen, rpcServer string, keysFilePath string, profile string, timeout uint32) error {
+func Start(params *dagconfig.Params, listen, rpcServer string, keysFilePath string, profile string, timeout uint32, minFeePerTx uint64) error {
 	initLog(defaultLogFile, defaultErrLogFile)
 
 	defer panics.HandlePanic(log, "MAIN", nil)
@@ -110,6 +111,7 @@ func Start(params *dagconfig.Params, listen, rpcServer string, keysFilePath stri
 		backgroundRPCClient:         backgroundRPCClient,
 		params:                      params,
 		coinbaseMaturity:            coinbaseMaturity,
+		minFeePerTx:                 minFeePerTx,
 		utxosSortedByAmount:         []*walletUTXO{},
 		nextSyncStartIndex:          0,
 		keysFile:                    keysFile,

cmd/kaspawallet/start_daemon.go

@@ -3,5 +3,5 @@ package main
 import "github.com/kaspanet/kaspad/cmd/kaspawallet/daemon/server"
 
 func startDaemon(conf *startDaemonConfig) error {
-	return server.Start(conf.NetParams(), conf.Listen, conf.RPCServer, conf.KeysFile, conf.Profile, conf.Timeout)
+	return server.Start(conf.NetParams(), conf.Listen, conf.RPCServer, conf.KeysFile, conf.Profile, conf.Timeout, conf.MinFeePerTx)
 }