ceremonyclient/go-multiaddr/multiaddr/main.go
2024-10-12 11:55:17 -07:00

101 lines
2.3 KiB
Go

package main
import (
"encoding/hex"
"flag"
"fmt"
"os"
"strings"
maddr "github.com/multiformats/go-multiaddr"
)
var (
flagHelp bool
)
func main() {
flag.Usage = func() {
usage := `usage: %s [options] ADDR
Print details about the given multiaddr.
Options:
`
fmt.Fprintf(os.Stderr, usage, os.Args[0])
flag.PrintDefaults()
}
flag.BoolVar(&flagHelp, "h", false, "display help message")
flag.Parse()
if flagHelp || len(flag.Args()) == 0 {
flag.Usage()
os.Exit(0)
}
addrStr := flag.Args()[0]
var addr maddr.Multiaddr
var merr error
if strings.HasPrefix(addrStr, "0x") {
addrBytes, err := hex.DecodeString(addrStr[2:])
if err != nil {
fmt.Fprintf(os.Stderr, "parse error: %s\n", err)
os.Exit(1)
}
addr, merr = maddr.NewMultiaddrBytes(addrBytes)
} else {
addr, merr = maddr.NewMultiaddr(addrStr)
}
if merr != nil {
fmt.Fprintf(os.Stderr, "parse error: %s\n", merr)
os.Exit(1)
}
infoCommand(addr)
}
func infoCommand(addr maddr.Multiaddr) {
var compsJson []string
maddr.ForEach(addr, func(comp maddr.Component, e error) bool {
if e != nil {
panic(e)
}
lengthPrefix := ""
if comp.Protocol().Size == maddr.LengthPrefixedVarSize {
v, err := maddr.CodeToVarint(len(comp.RawValue()))
if err != nil {
panic(err)
}
lengthPrefix = "0x" + hex.EncodeToString(v)
}
compsJson = append(compsJson, `{`+
fmt.Sprintf(`"string": "%s", `, comp.String())+
fmt.Sprintf(`"stringSize": "%d", `, len(comp.String()))+
fmt.Sprintf(`"packed": "0x%x", `, comp.Bytes())+
fmt.Sprintf(`"packedSize": "%d", `, len(comp.Bytes()))+
fmt.Sprintf(`"value": %#v, `, comp.Value())+
fmt.Sprintf(`"rawValue": "0x%x", `, comp.RawValue())+
fmt.Sprintf(`"valueSize": "%d", `, len(comp.RawValue()))+
fmt.Sprintf(`"protocol": "%s", `, comp.Protocol().Name)+
fmt.Sprintf(`"codec": "%d", `, comp.Protocol().Code)+
fmt.Sprintf(`"uvarint": "0x%x", `, comp.Protocol().VCode)+
fmt.Sprintf(`"lengthPrefix": "%s"`, lengthPrefix)+
`}`)
return true
})
addrJson := `{
"string": "%[1]s",
"stringSize": "%[2]d",
"packed": "0x%[3]x",
"packedSize": "%[4]d",
"components": [
%[5]s
]
}`
fmt.Fprintf(os.Stdout, addrJson+"\n",
addr.String(), len(addr.String()), addr.Bytes(), len(addr.Bytes()), strings.Join(compsJson, ",\n "))
}