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init: add random chain-id generator (#797)

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* init: add random chain-id generator

* Update types/chain_id.go

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Alessio Treglia <alessio@tendermint.com>
This commit is contained in:
Helder Moreira 2021-02-26 15:50:22 +00:00 committed by GitHub
parent a82a2cebaf
commit 99112e1cbd
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 30 additions and 2 deletions
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20
client/config.go
View File

@ -61,3 +61,23 @@ func ValidateChainID(baseCmd *cobra.Command) *cobra.Command {
baseCmd.RunE = validateFn
return baseCmd
}
// GenerateChainID wraps a cobra command with a RunE function with base 10 integer chain-id random generation
// when a chain-id is not provided.
func GenerateChainID(baseCmd *cobra.Command) *cobra.Command {
// Copy base run command to be used after chain verification
baseRunE := baseCmd.RunE
// Function to replace command's RunE function
generateFn := func(cmd *cobra.Command, args []string) error {
chainID := viper.GetString(flags.FlagChainID)
if chainID == "" {
viper.Set(flags.FlagChainID, ethermint.GenerateRandomChainID())
}
return baseRunE(cmd, args)
}
baseCmd.RunE = generateFn
return baseCmd
}

6
cmd/ethermintd/main.go
View File

@ -65,8 +65,10 @@ func main() {
}
// CLI commands to initialize the chain
rootCmd.AddCommand(
client.ValidateChainID(
genutilcli.InitCmd(ctx, cdc, app.ModuleBasics, app.DefaultNodeHome),
client.GenerateChainID(
client.ValidateChainID(
genutilcli.InitCmd(ctx, cdc, app.ModuleBasics, app.DefaultNodeHome),
),
),
genutilcli.CollectGenTxsCmd(ctx, cdc, auth.GenesisAccountIterator{}, app.DefaultNodeHome),
genutilcli.MigrateGenesisCmd(ctx, cdc),

6
types/chain_id.go
View File

@ -7,6 +7,7 @@ import (
"strings"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
tmrand "github.com/tendermint/tendermint/libs/rand"
)
var (
@ -46,3 +47,8 @@ func ParseChainID(chainID string) (*big.Int, error) {
return chainIDInt, nil
}
// GenerateRandomChainID returns a random chain-id in the valid format.
func GenerateRandomChainID() string {
return fmt.Sprintf("ethermint-%d", 10+tmrand.Intn(10000))
}