interface.go

package multiaddr

import (
	"encoding"
	"encoding/json"
)

/*
Multiaddr is a cross-protocol, cross-platform format for representing
internet addresses. It emphasizes explicitness and self-description.
Learn more here: https://github.com/multiformats/multiaddr

Multiaddrs have both a binary and string representation.

	import ma "github.com/multiformats/go-multiaddr"

	addr, err := ma.NewMultiaddr("/ip4/1.2.3.4/tcp/80")
	// err non-nil when parsing failed.
*/
type Multiaddr interface {
	json.Marshaler
	json.Unmarshaler
	encoding.TextMarshaler
	encoding.TextUnmarshaler
	encoding.BinaryMarshaler
	encoding.BinaryUnmarshaler

	// Equal returns whether two Multiaddrs are exactly equal
	Equal(Multiaddr) bool

	// Bytes returns the []byte representation of this Multiaddr
	//
	// This function may expose immutable, internal state. Do not modify.
	Bytes() []byte

	// String returns the string representation of this Multiaddr
	// (may panic if internal state is corrupted)
	String() string

	// Protocols returns the list of Protocols this Multiaddr includes
	// will panic if protocol code incorrect (and bytes accessed incorrectly)
	Protocols() []Protocol

	// Encapsulate wraps this Multiaddr around another. For example:
	//
	//      /ip4/1.2.3.4 encapsulate /tcp/80 = /ip4/1.2.3.4/tcp/80
	//
	Encapsulate(Multiaddr) Multiaddr

	// Decapsulate removes a Multiaddr wrapping. For example:
	//
	//      /ip4/1.2.3.4/tcp/80 decapsulate /tcp/80 = /ip4/1.2.3.4
	//      /ip4/1.2.3.4/tcp/80 decapsulate /udp/80 = /ip4/1.2.3.4/tcp/80
	//      /ip4/1.2.3.4/tcp/80 decapsulate /ip4/1.2.3.4 = nil
	//
	Decapsulate(Multiaddr) Multiaddr

	// ValueForProtocol returns the value (if any) following the specified protocol
	//
	// Note: protocols can appear multiple times in a single multiaddr.
	// Consider using `ForEach` to walk over the addr manually.
	ValueForProtocol(code int) (string, error)
}