112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
package commands
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import (
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"encoding/hex"
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"fmt"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"github.com/cosmos/cosmos-sdk/client"
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"github.com/cosmos/cosmos-sdk/client/core"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/wire"
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"github.com/cosmos/cosmos-sdk/x/bank"
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cryptokeys "github.com/tendermint/go-crypto/keys"
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)
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const (
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flagTo = "to"
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flagAmount = "amount"
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)
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// SendTxCommand will create a send tx and sign it with the given key
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func SendTxCmd(Cdc *wire.Codec) *cobra.Command {
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cmdr := Commander{Cdc}
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cmd := &cobra.Command{
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Use: "send",
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Short: "Create and sign a send tx",
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RunE: cmdr.sendTxCmd,
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}
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cmd.Flags().String(flagTo, "", "Address to send coins")
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cmd.Flags().String(flagAmount, "", "Amount of coins to send")
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return cmd
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}
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type Commander struct {
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Cdc *wire.Codec
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}
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func (c Commander) sendTxCmd(cmd *cobra.Command, args []string) error {
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ctx := core.NewCoreContextFromViper()
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// get the from address
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from, err := ctx.GetFromAddress()
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if err != nil {
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return err
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}
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// parse coins
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amount := viper.GetString(flagAmount)
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coins, err := sdk.ParseCoins(amount)
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if err != nil {
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return err
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}
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// parse destination address
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dest := viper.GetString(flagTo)
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bz, err := hex.DecodeString(dest)
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if err != nil {
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return err
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}
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to := sdk.Address(bz)
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// get account name
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name := viper.GetString(client.FlagName)
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// build message
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msg := BuildMsg(from, to, coins)
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// build and sign the transaction, then broadcast to Tendermint
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res, err := ctx.SignBuildBroadcast(name, msg, c.Cdc)
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if err != nil {
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return err
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}
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fmt.Printf("Committed at block %d. Hash: %s\n", res.Height, res.Hash.String())
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return nil
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}
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func BuildMsg(from sdk.Address, to sdk.Address, coins sdk.Coins) sdk.Msg {
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input := bank.NewInput(from, coins)
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output := bank.NewOutput(to, coins)
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msg := bank.NewSendMsg([]bank.Input{input}, []bank.Output{output})
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return msg
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}
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func (c Commander) SignMessage(msg sdk.Msg, kb cryptokeys.Keybase, accountName string, password string) ([]byte, error) {
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// sign and build
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bz := msg.GetSignBytes()
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sig, pubkey, err := kb.Sign(accountName, password, bz)
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if err != nil {
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return nil, err
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}
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sigs := []sdk.StdSignature{{
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PubKey: pubkey,
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Signature: sig,
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Sequence: viper.GetInt64(client.FlagName),
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}}
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// TODO: fees
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var fee sdk.StdFee
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// marshal bytes
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tx := sdk.NewStdTx(msg, fee, sigs)
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txBytes, err := c.Cdc.MarshalBinary(tx)
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if err != nil {
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return nil, err
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}
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return txBytes, nil
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}
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