ede4b3fe23
Co-authored-by: larry <26318510+larry0x@users.noreply.github.com> Co-authored-by: Julien Robert <julien@rbrt.fr>
102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
package cli
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import (
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"strings"
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"github.com/spf13/cobra"
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"github.com/cosmos/cosmos-sdk/client"
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"github.com/cosmos/cosmos-sdk/client/flags"
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"github.com/cosmos/cosmos-sdk/client/tx"
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authclient "github.com/cosmos/cosmos-sdk/x/auth/client"
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)
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// GetSimulateCmd returns a command that simulates whether a transaction will be
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// successful.
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func GetSimulateCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "simulate /path/to/unsigned-tx.json --from keyname",
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Short: "Simulate the gas usage of a transaction",
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Long: strings.TrimSpace(`Simulate whether a transaction will be successful:
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- if successful, the simulation result is printed, which includes the gas
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consumption, message response data, and events emitted;
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- if unsuccessful, the error message is printed.
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The user must provide the path to a JSON-encoded unsigned transaction, typically
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generated by any transaction command with the --generate-only flag. It should
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look like below. Note that the "signer_infos" and "signatures" fields are left
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empty; they will be auto-populated by dummy data for simulation purpose.
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{
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"body": {
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"messages": [
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{
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"@type": "/cosmos.bank.v1beta1.MsgSend",
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"from_address": "cosmos1...",
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"to_address": "cosmos1...",
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"amount": [
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{
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"denom": "utoken",
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"amount": "12345"
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}
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]
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}
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],
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"memo": "",
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"timeout_height": "0",
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"extension_options": [],
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"non_critical_extension_options": []
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},
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"auth_info": {
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"signer_infos": [],
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"fee": {
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"amount": [],
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"gas_limit": "200000",
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"payer": "",
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"granter": ""
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},
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"tip": null
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},
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"signatures": []
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}
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The --from flag is mandatory, as the signer account's correct sequence number is
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necessary for simulation.
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`),
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Args: cobra.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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clientCtx, err := client.GetClientTxContext(cmd)
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if err != nil {
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return err
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}
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txf, err := tx.NewFactoryCLI(clientCtx, cmd.Flags())
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if err != nil {
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return err
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}
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txf, err = txf.Prepare(clientCtx)
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if err != nil {
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return err
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}
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stdTx, err := authclient.ReadTxFromFile(clientCtx, args[0])
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if err != nil {
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return err
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}
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simRes, _, err := tx.CalculateGas(clientCtx, txf, stdTx.GetMsgs()...)
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if err != nil {
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return err
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}
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return clientCtx.PrintProto(simRes)
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},
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}
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flags.AddTxFlagsToCmd(cmd)
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return cmd
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}
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