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addresslist.go
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addresslist.go
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package p2p
import (
"bytes"
"encoding/csv"
"fmt"
"strings"
"github.com/multiformats/go-multiaddr"
)
// AddressList represents a list of addresses.
type AddressList []multiaddr.Multiaddr
// AddressListFromStringSlice parses strings in the slice into
// Multiaddr values and returns them as an AddressList.
func AddressListFromStringSlice(s []string) (AddressList, error) {
al := make(AddressList, len(s))
for n, s := range s {
ma, err := multiaddr.NewMultiaddr(s)
if err != nil {
return nil, fmt.Errorf("address %s is not a valid multiaddr: %w", s, err)
}
al[n] = ma
}
return al, nil
}
// AddressListFromString parses a string containing a Multiaddr
// and returns it as an AddressList.
func AddressListFromString(s string) (AddressList, error) {
return AddressListFromStringSlice([]string{s})
}
// MustParseAddresses parses multiaddr strings into AddressList, and
// panics upon any parse errors.
func MustParseAddresses(s ...string) AddressList {
al, err := AddressListFromStringSlice(s)
if err != nil {
panic(err)
}
return al
}
// String implements Stringer.
func (al AddressList) String() string {
str, _ := writeAsCSV(al)
return "[" + str + "]"
}
func writeAsCSV(vals AddressList) (string, error) {
strs := make([]string, len(vals))
for n, v := range vals {
strs[n] = v.String()
}
var b bytes.Buffer
w := csv.NewWriter(&b)
if err := w.Write(strs); err != nil {
return "", err
}
w.Flush()
return strings.TrimSuffix(b.String(), "\n"), nil
}