Allow fee to be below minfee, if given explicitly. (algorand#2295)

This makes other txns accept explicitly low fees.  Sorry for the code
duplication, but I did not want to change libgoal's existing behavior
where it increases fee to minfee.

Author: jannotti

cmd/goal/application.go

@@ -402,6 +402,10 @@ var createAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		if outFilename == "" {
 			// Broadcast
@@ -480,6 +484,10 @@ var updateAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		// Broadcast or write transaction to file
 		if outFilename == "" {
@@ -553,6 +561,10 @@ var optInAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		// Broadcast or write transaction to file
 		if outFilename == "" {
@@ -626,6 +638,10 @@ var closeOutAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		// Broadcast or write transaction to file
 		if outFilename == "" {
@@ -699,6 +715,10 @@ var clearAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		// Broadcast or write transaction to file
 		if outFilename == "" {
@@ -772,6 +792,10 @@ var callAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		// Broadcast or write transaction to file
 		if outFilename == "" {
@@ -845,6 +869,10 @@ var deleteAppCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		// Broadcast or write transaction to file
 		if outFilename == "" {

cmd/goal/asset.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/spf13/cobra"
 
+	"github.com/algorand/go-algorand/data/basics"
 	"github.com/algorand/go-algorand/libgoal"
 )
 
@@ -214,6 +215,10 @@ var createAssetCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		if outFilename == "" {
 			wh, pw := ensureWalletHandleMaybePassword(dataDir, walletName, true)
@@ -289,6 +294,10 @@ var destroyAssetCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		if outFilename == "" {
 			wh, pw := ensureWalletHandleMaybePassword(dataDir, walletName, true)
@@ -378,6 +387,10 @@ var configAssetCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		if outFilename == "" {
 			wh, pw := ensureWalletHandleMaybePassword(dataDir, walletName, true)
@@ -447,6 +460,10 @@ var sendAssetCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		tx.Note = parseNoteField(cmd)
 		tx.Lease = parseLease(cmd)
@@ -524,6 +541,10 @@ var freezeAssetCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		if outFilename == "" {
 			wh, pw := ensureWalletHandleMaybePassword(dataDir, walletName, true)

cmd/goal/interact.go

@@ -601,6 +601,10 @@ var appExecuteCmd = &cobra.Command{
 		if err != nil {
 			reportErrorf("Cannot construct transaction: %s", err)
 		}
+		explicitFee := cmd.Flags().Changed("fee")
+		if explicitFee {
+			tx.Fee = basics.MicroAlgos{Raw: fee}
+		}
 
 		if outFilename == "" {
 			wh, pw := ensureWalletHandleMaybePassword(dataDir, walletName, true)