Problem: base denomination can't be parsed with decimal point (fixes #16

)

Solution:
- decimal point is something for the future: cosmos/cosmos-sdk#7113
- for the moment -- configured "human" denomination ("cro") + base ("basecro" / "carson") -- configs/tx use "basecro"
- custom commands that use "human" denomination and convert it to the base
- custom init that changes bond_denom + gov minimum deposit to use the base denomination

app/prefix.go

@@ -11,12 +11,21 @@ var (
 	ValidatorPubKeyPrefix  = "crocnclpub"
 	ConsNodeAddressPrefix  = "crocnclcons"
 	ConsNodePubKeyPrefix   = "crocnclconspub"
+	HumanCoinUnit          = "cro"
+	BaseCoinUnit           = "basecro" // 10^-8 AKA "carson"
 )
 
 func SetConfig() {
 	config := sdk.GetConfig()
 	config.SetBech32PrefixForAccount(AccountAddressPrefix, AccountPubKeyPrefix)
 	config.SetBech32PrefixForValidator(ValidatorAddressPrefix, ValidatorPubKeyPrefix)
 	config.SetBech32PrefixForConsensusNode(ConsNodeAddressPrefix, ConsNodePubKeyPrefix)
+
+	croUnit := sdk.OneDec()
+	sdk.RegisterDenom(HumanCoinUnit, croUnit)
+
+	carsonUnit := sdk.NewDecWithPrec(1, 8) // 10^-8 (carson)
+	sdk.RegisterDenom(BaseCoinUnit, carsonUnit)
+
 	config.Seal()
 }

app/prefix_test.go

@@ -0,0 +1,42 @@
+package app_test
+
+import (
+	"testing"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/crypto-com/chain-main/app"
+	"github.com/stretchr/testify/require"
+)
+
+func TestConversion(t *testing.T) {
+	app.SetConfig()
+
+	testCases := []struct {
+		input  sdk.Coin
+		denom  string
+		result sdk.Coin
+		expErr bool
+	}{
+		{sdk.NewCoin("foo", sdk.ZeroInt()), app.HumanCoinUnit, sdk.Coin{}, true},
+		{sdk.NewCoin(app.HumanCoinUnit, sdk.ZeroInt()), "foo", sdk.Coin{}, true},
+		{sdk.NewCoin(app.HumanCoinUnit, sdk.ZeroInt()), "FOO", sdk.Coin{}, true},
+
+		{sdk.NewCoin(app.HumanCoinUnit, sdk.NewInt(5)), app.BaseCoinUnit, sdk.NewCoin(app.BaseCoinUnit, sdk.NewInt(500000000)), false}, // cro => carson
+
+		{sdk.NewCoin(app.BaseCoinUnit, sdk.NewInt(500000000)), app.HumanCoinUnit, sdk.NewCoin(app.HumanCoinUnit, sdk.NewInt(5)), false}, // carson => cro
+
+	}
+
+	for i, tc := range testCases {
+		res, err := sdk.ConvertCoin(tc.input, tc.denom)
+		require.Equal(
+			t, tc.expErr, err != nil,
+			"unexpected error; tc: #%d, input: %s, denom: %s", i+1, tc.input, tc.denom,
+		)
+		require.Equal(
+			t, tc.result, res,
+			"invalid result; tc: #%d, input: %s, denom: %s", i+1, tc.input, tc.denom,
+		)
+	}
+
+}

cmd/chain-maincli/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"os"
 	"path"
@@ -10,21 +11,24 @@ import (
 	"github.com/cosmos/cosmos-sdk/client/keys"
 	"github.com/cosmos/cosmos-sdk/client/lcd"
 	"github.com/cosmos/cosmos-sdk/client/rpc"
+	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/version"
 	"github.com/cosmos/cosmos-sdk/x/auth"
 	authcmd "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
 	authrest "github.com/cosmos/cosmos-sdk/x/auth/client/rest"
 	"github.com/cosmos/cosmos-sdk/x/bank"
-	bankcmd "github.com/cosmos/cosmos-sdk/x/bank/client/cli"
+	//"github.com/gogo/protobuf/codec"
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 
-	"github.com/tendermint/go-amino"
+	amino "github.com/tendermint/go-amino"
 	"github.com/tendermint/tendermint/libs/cli"
 
+	"github.com/cosmos/cosmos-sdk/client/context"
+	"github.com/cosmos/cosmos-sdk/x/auth/client/utils"
 	"github.com/crypto-com/chain-main/app"
-  // this line is used by starport scaffolding
+	// this line is used by starport scaffolding
 )
 
 func main() {
@@ -99,14 +103,55 @@ func queryCmd(cdc *amino.Codec) *cobra.Command {
 	return queryCmd
 }
 
+// SendTxCmd will create a send tx and sign it with the given key.
+// and convert CRO to carson
+func CustomSendTxCmd(cdc *amino.Codec) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "send [from_key_or_address] [to_address] [amount]",
+		Short: "Create and sign a send tx",
+		Args:  cobra.ExactArgs(3),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			inBuf := bufio.NewReader(cmd.InOrStdin())
+			txBldr := auth.NewTxBuilderFromCLI(inBuf).WithTxEncoder(utils.GetTxEncoder(cdc))
+			cliCtx := context.NewCLIContextWithInputAndFrom(inBuf, args[0]).WithCodec(cdc)
+
+			to, err := sdk.AccAddressFromBech32(args[1])
+			if err != nil {
+				return err
+			}
+
+			// parse coins trying to be sent
+			coins, err := sdk.ParseCoins(args[2])
+			if err != nil {
+				return err
+			}
+			for i := 0; i < len(coins); i++ {
+				coin, err := sdk.ConvertCoin(coins[i], app.BaseCoinUnit)
+				if err != nil {
+					return err
+				}
+				coins[i] = coin
+			}
+
+			// build and sign the transaction, then broadcast to Tendermint
+			msg := bank.NewMsgSend(cliCtx.GetFromAddress(), to, coins)
+			return utils.GenerateOrBroadcastMsgs(cliCtx, txBldr, []sdk.Msg{msg})
+		},
+	}
+
+	cmd = flags.PostCommands(cmd)[0]
+
+	return cmd
+}
+
 func txCmd(cdc *amino.Codec) *cobra.Command {
 	txCmd := &cobra.Command{
 		Use:   "tx",
 		Short: "Transactions subcommands",
 	}
 
 	txCmd.AddCommand(
-		bankcmd.SendTxCmd(cdc),
+		CustomSendTxCmd(cdc),
 		flags.LineBreak,
 		authcmd.GetSignCommand(cdc),
 		authcmd.GetMultiSignCommand(cdc),
@@ -141,7 +186,7 @@ func registerRoutes(rs *lcd.RestServer) {
 	client.RegisterRoutes(rs.CliCtx, rs.Mux)
 	authrest.RegisterTxRoutes(rs.CliCtx, rs.Mux)
 	app.ModuleBasics.RegisterRESTRoutes(rs.CliCtx, rs.Mux)
-  // this line is used by starport scaffolding # 2
+	// this line is used by starport scaffolding # 2
 }
 
 func initConfig(cmd *cobra.Command) error {

cmd/chain-maind/genaccounts.go

@@ -5,14 +5,15 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/crypto-com/chain-main/app"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 
 	"github.com/tendermint/tendermint/libs/cli"
 
 	"github.com/cosmos/cosmos-sdk/client/flags"
-	"github.com/cosmos/cosmos-sdk/crypto/keys"
 	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/cosmos-sdk/crypto/keys"
 	"github.com/cosmos/cosmos-sdk/server"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth"
@@ -72,6 +73,13 @@ contain valid denominations. Accounts may optionally be supplied with vesting pa
 			if err != nil {
 				return fmt.Errorf("failed to parse coins: %w", err)
 			}
+			for i := 0; i < len(coins); i++ {
+				coin, err := sdk.ConvertCoin(coins[i], app.BaseCoinUnit)
+				if err != nil {
+					return fmt.Errorf("failed to convert coins: %w", err)
+				}
+				coins[i] = coin
+			}
 
 			vestingStart := viper.GetInt64(flagVestingStart)
 			vestingEnd := viper.GetInt64(flagVestingEnd)
@@ -80,6 +88,14 @@ contain valid denominations. Accounts may optionally be supplied with vesting pa
 				return fmt.Errorf("failed to parse vesting amount: %w", err)
 			}
 
+			for i := 0; i < len(vestingAmt); i++ {
+				coin, err := sdk.ConvertCoin(vestingAmt[i], app.BaseCoinUnit)
+				if err != nil {
+					return fmt.Errorf("failed to convert coins: %w", err)
+				}
+				vestingAmt[i] = coin
+			}
+
 			// create concrete account type based on input parameters
 			var genAccount authexported.GenesisAccount