neo-go/cli/options/options.go

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/*
Package options contains a set of common CLI options and helper functions to use them.
*/
package options
import (
"context"
"errors"
"time"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"github.com/nspcc-dev/neo-go/pkg/rpc/client"
"github.com/urfave/cli"
)
// DefaultTimeout is the default timeout used for RPC requests.
const DefaultTimeout = 10 * time.Second
// RPCEndpointFlag is a long flag name for an RPC endpoint. It can be used to
// check for flag presence in the context.
const RPCEndpointFlag = "rpc-endpoint"
// Network is a set of flags for choosing the network to operate on
// (privnet/mainnet/testnet).
var Network = []cli.Flag{
cli.BoolFlag{Name: "privnet, p"},
cli.BoolFlag{Name: "mainnet, m"},
cli.BoolFlag{Name: "testnet, t"},
cli.BoolFlag{Name: "unittest", Hidden: true},
}
// RPC is a set of flags used for RPC connections (endpoint and timeout).
var RPC = []cli.Flag{
cli.StringFlag{
Name: RPCEndpointFlag + ", r",
Usage: "RPC node address",
},
cli.DurationFlag{
Name: "timeout, s",
Value: DefaultTimeout,
Usage: "Timeout for the operation",
},
}
var errNoEndpoint = errors.New("no RPC endpoint specified, use option '--" + RPCEndpointFlag + "' or '-r'")
// GetNetwork examines Context's flags and returns the appropriate network. It
// defaults to PrivNet if no flags are given.
func GetNetwork(ctx *cli.Context) netmode.Magic {
var net = netmode.PrivNet
if ctx.Bool("testnet") {
net = netmode.TestNet
}
if ctx.Bool("mainnet") {
net = netmode.MainNet
}
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if ctx.Bool("unittest") {
net = netmode.UnitTestNet
}
return net
}
// GetTimeoutContext returns a context.Context with the default or a user-set timeout.
func GetTimeoutContext(ctx *cli.Context) (context.Context, func()) {
dur := ctx.Duration("timeout")
if dur == 0 {
dur = DefaultTimeout
}
return context.WithTimeout(context.Background(), dur)
}
// GetRPCClient returns an RPC client instance for the given Context.
func GetRPCClient(gctx context.Context, ctx *cli.Context) (*client.Client, cli.ExitCoder) {
endpoint := ctx.String(RPCEndpointFlag)
if len(endpoint) == 0 {
return nil, cli.NewExitError(errNoEndpoint, 1)
}
c, err := client.New(gctx, endpoint, client.Options{})
if err != nil {
return nil, cli.NewExitError(err, 1)
}
err = c.Init()
if err != nil {
return nil, cli.NewExitError(err, 1)
}
return c, nil
}