@multiformats/multiaddr
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    Interface Multiaddr

    interface Multiaddr {
        bytes: Uint8Array;
        decapsulate(addr: string | Multiaddr): Multiaddr;
        decapsulateCode(code: number): Multiaddr;
        encapsulate(addr: MultiaddrInput): Multiaddr;
        equals(addr: { bytes: Uint8Array }): boolean;
        getPath(): null | string;
        getPeerId(): null | string;
        isThinWaistAddress(addr?: Multiaddr): boolean;
        nodeAddress(): NodeAddress;
        protoCodes(): number[];
        protoNames(): string[];
        protos(): Protocol[];
        resolve(options?: ResolveOptions): Promise<Multiaddr[]>;
        stringTuples(): StringTuple[];
        toJSON(): string;
        toOptions(): MultiaddrObject;
        toString(): string;
        tuples(): Tuple[];
    }
    Index

    Properties

    bytes

    Methods

    decapsulate decapsulateCode encapsulate equals getPath getPeerId isThinWaistAddress nodeAddress protoCodes protoNames protos resolve stringTuples toJSON toOptions toString tuples

    Properties

    bytes: Uint8Array

    Methods

    • Decapsulates a Multiaddr from another Multiaddr

      Parameters

      • addr: string | Multiaddr

        Multiaddr to remove from this Multiaddr

      Returns Multiaddr

      import { multiaddr } from '@multiformats/multiaddr'

      const mh1 = multiaddr('/ip4/8.8.8.8/tcp/1080')
      // Multiaddr(/ip4/8.8.8.8/tcp/1080)

      const mh2 = multiaddr('/ip4/127.0.0.1/tcp/4001')
      // Multiaddr(/ip4/127.0.0.1/tcp/4001)

      const mh3 = mh1.encapsulate(mh2)
      // Multiaddr(/ip4/8.8.8.8/tcp/1080/ip4/127.0.0.1/tcp/4001)

      mh3.decapsulate(mh2).toString()
      // '/ip4/8.8.8.8/tcp/1080'

    • A more reliable version of decapsulate if you are targeting a specific code, such as 421 (the p2p protocol code). The last index of the code will be removed from the Multiaddr, and a new instance will be returned. If the code is not present, the original Multiaddr is returned.

      Parameters

      • code: number

      Returns Multiaddr

      import { multiaddr } from '@multiformats/multiaddr'

      const addr = multiaddr('/ip4/0.0.0.0/tcp/8080/p2p/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSupNKC')
      // Multiaddr(/ip4/0.0.0.0/tcp/8080/p2p/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSupNKC)

      addr.decapsulateCode(421).toString()
      // '/ip4/0.0.0.0/tcp/8080'

      multiaddr('/ip4/127.0.0.1/tcp/8080').decapsulateCode(421).toString()
      // '/ip4/127.0.0.1/tcp/8080'

    • Encapsulates a Multiaddr in another Multiaddr

      Parameters

      Returns Multiaddr

      import { multiaddr } from '@multiformats/multiaddr'

      const mh1 = multiaddr('/ip4/8.8.8.8/tcp/1080')
      // Multiaddr(/ip4/8.8.8.8/tcp/1080)

      const mh2 = multiaddr('/ip4/127.0.0.1/tcp/4001')
      // Multiaddr(/ip4/127.0.0.1/tcp/4001)

      const mh3 = mh1.encapsulate(mh2)
      // Multiaddr(/ip4/8.8.8.8/tcp/1080/ip4/127.0.0.1/tcp/4001)

      mh3.toString()
      // '/ip4/8.8.8.8/tcp/1080/ip4/127.0.0.1/tcp/4001'

    • Checks if two Multiaddrs are the same

      Parameters

      Returns boolean

      import { multiaddr } from '@multiformats/multiaddr'

      const mh1 = multiaddr('/ip4/8.8.8.8/tcp/1080')
      // Multiaddr(/ip4/8.8.8.8/tcp/1080)

      const mh2 = multiaddr('/ip4/127.0.0.1/tcp/4001')
      // Multiaddr(/ip4/127.0.0.1/tcp/4001)

      mh1.equals(mh1)
      // true

      mh1.equals(mh2)
      // false

    • Extract the path if the multiaddr contains one

      Returns null | string

      import { multiaddr } from '@multiformats/multiaddr'

      const mh1 = multiaddr('/ip4/8.8.8.8/tcp/1080/unix/tmp/p2p.sock')
      // Multiaddr(/ip4/8.8.8.8/tcp/1080/unix/tmp/p2p.sock)

      // should return utf8 string or null if the id is missing or invalid
      const path = mh1.getPath()

    • Extract the peerId if the multiaddr contains one

      Returns null | string

      import { multiaddr } from '@multiformats/multiaddr'

      const mh1 = multiaddr('/ip4/8.8.8.8/tcp/1080/ipfs/QmValidBase58string')
      // Multiaddr(/ip4/8.8.8.8/tcp/1080/ipfs/QmValidBase58string)

      // should return QmValidBase58string or null if the id is missing or invalid
      const peerId = mh1.getPeerId()

    • Returns if a Multiaddr is a Thin Waist address or not.

      Thin Waist is if a Multiaddr adheres to the standard combination of:

      {IPv4, IPv6}/{TCP, UDP}

      Parameters

      Returns boolean

      import { multiaddr } from '@multiformats/multiaddr'

      const mh1 = multiaddr('/ip4/127.0.0.1/tcp/4001')
      // Multiaddr(/ip4/127.0.0.1/tcp/4001)
      const mh2 = multiaddr('/ip4/192.168.2.1/tcp/5001')
      // Multiaddr(/ip4/192.168.2.1/tcp/5001)
      const mh3 = mh1.encapsulate(mh2)
      // Multiaddr(/ip4/127.0.0.1/tcp/4001/ip4/192.168.2.1/tcp/5001)
      const mh4 = multiaddr('/ip4/127.0.0.1/tcp/2000/wss/p2p-webrtc-star/p2p/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSooo2a')
      // Multiaddr(/ip4/127.0.0.1/tcp/2000/wss/p2p-webrtc-star/p2p/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSooo2a)
      mh1.isThinWaistAddress()
      // true
      mh2.isThinWaistAddress()
      // true
      mh3.isThinWaistAddress()
      // false
      mh4.isThinWaistAddress()
      // false

    • Gets a Multiaddrs node-friendly address object. Note that protocol information is left out: in Node (and most network systems) the protocol is unknowable given only the address.

      Has to be a ThinWaist Address, otherwise throws error

      Returns NodeAddress

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').nodeAddress()
      // {family: 4, address: '127.0.0.1', port: 4001}

    • Returns the codes of the protocols in left-to-right order. See list of protocols

      Returns number[]

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').protoCodes()
      // [ 4, 6 ]

    • Returns the names of the protocols in left-to-right order. See list of protocols

      Returns string[]

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').protoNames()
      // [ 'ip4', 'tcp' ]

    • Returns the protocols the Multiaddr is defined with, as an array of objects, in left-to-right order. Each object contains the protocol code, protocol name, and the size of its address space in bits. See list of protocols

      Returns Protocol[]

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').protos()
      // [ { code: 4, size: 32, name: 'ip4' },
      //   { code: 6, size: 16, name: 'tcp' } ]

    • Resolve multiaddr if containing resolvable hostname.

      Parameters

      Returns Promise<Multiaddr[]>

      import { multiaddr, resolvers } from '@multiformats/multiaddr'

      resolvers.set('dnsaddr', resolverFunction)
      const mh1 = multiaddr('/dnsaddr/bootstrap.libp2p.io/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb')
      const resolvedMultiaddrs = await mh1.resolve()
      // [
      //   Multiaddr(/ip4/147.75.83.83/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb),
      //   Multiaddr(/ip4/147.75.83.83/tcp/443/wss/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb),
      //   Multiaddr(/ip4/147.75.83.83/udp/4001/quic/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb)
      // ]

    • Returns a tuple of string/number parts

      • tuples[][0] = code of protocol
      • tuples[][1] = contents of address

      Returns StringTuple[]

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').stringTuples()
      // [ [ 4, '127.0.0.1' ], [ 6, '4001' ] ]

    • Returns Multiaddr as a JSON encoded object

      Returns string

      import { multiaddr } from '@multiformats/multiaddr'

      JSON.stringify(multiaddr('/ip4/127.0.0.1/tcp/4001'))
      // '/ip4/127.0.0.1/tcp/4001'

    • Returns Multiaddr as a convinient options object to be used with net.createConnection

      Returns MultiaddrObject

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').toOptions()
      // { family: 4, host: '127.0.0.1', transport: 'tcp', port: 4001 }

    • Returns Multiaddr as a String

      Returns string

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').toString()
      // '/ip4/127.0.0.1/tcp/4001'

    • Returns a tuple of parts

      Returns Tuple[]

      import { multiaddr } from '@multiformats/multiaddr'

      multiaddr('/ip4/127.0.0.1/tcp/4001').tuples()
      // [ [ 4, <Buffer 7f 00 00 01> ], [ 6, <Buffer 0f a1> ] ]

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