Fix examples.

Add peer.nim.
Switch daemonapi to use PeerID from peer.nim.

examples/bootstrap.nim

@@ -1,4 +1,4 @@
-import asyncdispatch2, nimcrypto, strutils
+import chronos, nimcrypto, strutils
 import ../libp2p/daemon/daemonapi, ../libp2p/[base58, multicodec, multiaddress]
 import hexdump
 

examples/node.nim

@@ -1,4 +1,4 @@
-import asyncdispatch2, nimcrypto, strutils, os
+import chronos, nimcrypto, strutils, os
 import ../libp2p/daemon/daemonapi, ../libp2p/[base58, multiaddress]
 
 proc main(bn: string) {.async.} =

libp2p/daemon/daemonapi.nim

@@ -10,7 +10,7 @@
 ## This module implementes API for `go-libp2p-daemon`.
 import os, osproc, strutils, tables, streams, strtabs
 import chronos
-import ../varint, ../multiaddress, ../multicodec, ../base58, ../cid
+import ../varint, ../multiaddress, ../multicodec, ../base58, ../cid, ../peer
 import ../wire, ../protobuf/minprotobuf
 
 when not defined(windows):
@@ -76,7 +76,7 @@ type
     VALUE = 1,
     END = 2
 
-  PeerID* = seq[byte]
+  # PeerID* = seq[byte]
   MultiProtocol* = string
   LibP2PPublicKey* = seq[byte]
   DHTValue* = seq[byte]
@@ -745,8 +745,7 @@ proc transactMessage(transp: StreamTransport,
 proc getPeerInfo(pb: var ProtoBuffer): PeerInfo =
   ## Get PeerInfo object from ``pb``.
   result.addresses = newSeq[MultiAddress]()
-  result.peer = newSeq[byte]()
-  if pb.getBytes(1, result.peer) == -1:
+  if pb.getValue(1, result.peer) == -1:
     raise newException(DaemonLocalError, "Missing required field `peer`!")
   var address = newSeq[byte]()
   while pb.getBytes(2, address) != -1:
@@ -803,10 +802,10 @@ proc openStream*(api: DaemonAPI, peer: PeerID,
     pb.withMessage() do:
       var res = pb.enterSubmessage()
       if res == cast[int](ResponseType.STREAMINFO):
-        stream.peer = newSeq[byte]()
+        # stream.peer = newSeq[byte]()
         var raddress = newSeq[byte]()
         stream.protocol = ""
-        if pb.getLengthValue(1, stream.peer) == -1:
+        if pb.getValue(1, stream.peer) == -1:
           raise newException(DaemonLocalError, "Missing `peer` field!")
         if pb.getLengthValue(2, raddress) == -1:
           raise newException(DaemonLocalError, "Missing `address` field!")
@@ -825,10 +824,9 @@ proc streamHandler(server: StreamServer, transp: StreamTransport) {.async.} =
   var message = await transp.recvMessage()
   var pb = initProtoBuffer(message)
   var stream = new P2PStream
-  stream.peer = newSeq[byte]()
   var raddress = newSeq[byte]()
   stream.protocol = ""
-  if pb.getLengthValue(1, stream.peer) == -1:
+  if pb.getValue(1, stream.peer) == -1:
     raise newException(DaemonLocalError, "Missing `peer` field!")
   if pb.getLengthValue(2, raddress) == -1:
     raise newException(DaemonLocalError, "Missing `address` field!")
@@ -929,6 +927,10 @@ proc dhtGetSingleValue(pb: var ProtoBuffer): seq[byte] =
   if pb.getLengthValue(3, result) == -1:
     raise newException(DaemonLocalError, "Missing field `value`!")
 
+proc dhtGetSinglePeerID(pb: var ProtoBuffer): PeerID =
+  if pb.getValue(3, result) == -1:
+    raise newException(DaemonLocalError, "Missing field `value`!")
+
 proc enterDhtMessage(pb: var ProtoBuffer, rt: DHTResponseType) {.inline.} =
   var dtype: uint
   var res = pb.enterSubmessage()
@@ -1074,7 +1076,7 @@ proc dhtGetClosestPeers*(api: DaemonAPI, key: string,
         var cpb = initProtoBuffer(message)
         if cpb.getDhtMessageType() == DHTResponseType.END:
           break
-        list.add(cpb.dhtGetSingleValue())
+        list.add(cpb.dhtGetSinglePeerID())
       result = list
   finally:
     await api.closeConnection(transp)
@@ -1152,12 +1154,11 @@ proc pubsubListPeers*(api: DaemonAPI,
   try:
     var pb = await transp.transactMessage(requestPSListPeers(topic))
     withMessage(pb) do:
+      var peer: PeerID
       pb.enterPsMessage()
       var peers = newSeq[PeerID]()
-      var peer = newSeq[byte]()
-      while pb.getBytes(2, peer) != -1:
+      while pb.getValue(2, peer) != -1:
         peers.add(peer)
-        peer.setLen(0)
       result = peers
   finally:
     await api.closeConnection(transp)
@@ -1174,28 +1175,25 @@ proc pubsubPublish*(api: DaemonAPI, topic: string,
     await api.closeConnection(transp)
 
 proc getPubsubMessage*(pb: var ProtoBuffer): PubSubMessage =
+  result.data = newSeq[byte]()
+  result.seqno = newSeq[byte]()
+  result.signature = newSeq[byte]()
+  result.key = newSeq[byte]()
+  discard pb.getValue(1, result.peer)
+  discard pb.getBytes(2, result.data)
+  discard pb.getBytes(3, result.seqno)
   var item = newSeq[byte]()
-  for field in 1..6:
-    while true:
-      if pb.getBytes(field, item) == -1:
-        break
-      if field == 1:
-        result.peer = item
-      elif field == 2:
-        result.data = item
-      elif field == 3:
-        result.seqno = item
-      elif field == 4:
-        var copyitem = item
-        var stritem = cast[string](copyitem)
-        if len(result.topics) == 0:
-          result.topics = newSeq[string]()
-        result.topics.add(stritem)
-      elif field == 5:
-        result.signature = item
-      elif field == 6:
-        result.key = item
-      item.setLen(0)
+  while true:
+    if pb.getBytes(4, item) == -1:
+      break
+    var copyitem = item
+    var stritem = cast[string](copyitem)
+    if len(result.topics) == 0:
+      result.topics = newSeq[string]()
+    result.topics.add(stritem)
+    item.setLen(0)
+  discard pb.getBytes(5, result.signature)
+  discard pb.getBytes(6, result.key)
 
 proc pubsubLoop(api: DaemonAPI, ticket: PubsubTicket) {.async.} =
   while true:
@@ -1232,7 +1230,7 @@ proc `$`*(pinfo: PeerInfo): string =
   ## Get string representation of ``PeerInfo`` object.
   result = newStringOfCap(128)
   result.add("{PeerID: '")
-  result.add(Base58.encode(pinfo.peer))
+  result.add($pinfo.peer.pretty())
   result.add("' Addresses: [")
   let length = len(pinfo.addresses)
   for i in 0..<length:

libp2p/peer.nim

@@ -0,0 +1,164 @@
+## Nim-LibP2P
+## Copyright (c) 2018 Status Research & Development GmbH
+## Licensed under either of
+##  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+##  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+## at your option.
+## This file may not be copied, modified, or distributed except according to
+## those terms.
+
+## This module implementes API for libp2p peer.
+import hashes
+import nimcrypto/utils
+import crypto/crypto, multicodec, multihash, base58, vbuffer
+import protobuf/minprotobuf
+
+const
+  maxInlineKeyLength* = 42
+
+type
+  PeerID* = distinct seq[byte]
+
+proc pretty*(peerid: PeerID): string {.inline.} =
+  ## Return base58 encoded ``peerid`` representation.
+  Base58.encode(cast[seq[byte]](peerid))
+
+proc toBytes*(peerid: PeerID, data: var openarray[byte]): int =
+  ## Store PeerID ``peerid`` to array of bytes ``data``.
+  ##
+  ## Returns number of bytes needed to store ``peerid``.
+  var p = cast[seq[byte]](peerid)
+  result = len(p)
+  if len(data) >= result and result > 0:
+    copyMem(addr data[0], addr p[0], result)
+
+proc getBytes*(peerid: PeerID): seq[byte] {.inline.} =
+  ## Return PeerID as array of bytes.
+  var p = cast[seq[byte]](peerid)
+  result = @p
+
+proc fromKey*(pubkey: PublicKey): PeerID =
+  ## Returns the PeerID corresponding to public key ``pubkey``.
+  var pubraw = pubkey.getBytes()
+  var mh: MultiHash
+  var codec: MultiCodec
+  if len(pubraw) <= maxInlineKeyLength:
+    mh = MultiHash.digest("identity", pubraw)
+  else:
+    mh = MultiHash.digest("sha2-256", pubraw)
+  result = cast[PeerID](mh.data.buffer)
+
+proc fromKey*(seckey: PrivateKey): PeerID {.inline.} =
+  ## Returns the PeerID corresponding to private key ``seckey``.
+  result = fromKey(seckey.getKey())
+
+proc hex*(peerid: PeerID): string =
+  ## Returns hexadecimal string representation of ``peerid``.
+  var p = cast[seq[byte]](peerid)
+  if len(p) > 0:
+    result = toHex(p)
+
+proc len*(a: PeerID): int {.borrow.}
+
+proc cmp*(a, b: PeerID): int =
+  ## Compares two peer ids ``a`` and ``b``.
+  ## Returns:
+  ##
+  ## | 0 iff a == b
+  ## | < 0 iff a < b
+  ## | > 0 iff a > b
+  var ab = cast[seq[byte]](a)
+  var bb = cast[seq[byte]](b)
+  var i = 0
+  var m = min(len(ab), len(bb))
+  while i < m:
+    result = ord(ab[i]) - ord(bb[i])
+    if result != 0: return
+    inc(i)
+  result = len(ab) - len(bb)
+
+proc `<=`*(a, b: PeerID): bool {.inline.} =
+  (cmp(a, b) <= 0)
+
+proc `<`*(a, b: PeerID): bool {.inline.} =
+  (cmp(a, b) < 0)
+
+proc `>=`*(a, b: PeerID): bool {.inline.} =
+  (cmp(a, b) >= 0)
+
+proc `>`*(a, b: PeerID): bool {.inline.} =
+  (cmp(a, b) > 0)
+
+proc `==`*(a, b: PeerID): bool {.inline.} =
+  (cmp(a, b) == 0)
+
+proc hash*(peerid: PeerID): Hash {.inline.} =
+  var p = cast[seq[byte]](peerid)
+  result = hash(p)
+
+proc validate*(peerid: PeerID): bool =
+  ## Validate check if ``peerid`` is empty or not.
+  var p = cast[seq[byte]](peerid)
+  if len(p) > 0:
+    result = MultiHash.validate(p)
+
+proc hasPublicKey*(peerid: PeerID): bool =
+  ## Returns ``true`` if ``peerid`` is small enough to hold public key inside.
+  var mh: MultiHash
+  var p = cast[seq[byte]](peerid)
+  if len(p) > 0:
+    if MultiHash.decode(p, mh) > 0:
+      if mh.mcodec == multiCodec("identity"):
+        result = true
+
+proc extractPublicKey*(peerid: PeerID, pubkey: var PublicKey): bool =
+  ## Returns ``true`` if public key was successfully decoded and stored
+  ## in ``pubkey``.
+  ##
+  ## Returns ``false`` otherwise
+  var mh: MultiHash
+  var p = cast[seq[byte]](peerid)
+  if len(p) > 0:
+    if MultiHash.decode(p, mh) > 0:
+      if mh.mcodec == multiCodec("identity"):
+        let length = len(mh.data.buffer)
+        result = pubkey.init(mh.data.buffer.toOpenArray(mh.dpos, length - 1))
+
+proc match*(peerid: PeerID, pubkey: PublicKey): bool {.inline.} =
+  ## Returns ``true`` if ``peerid`` matches public key ``pubkey``.
+  result = (peerid == pubkey.fromKey())
+
+proc match*(peerid: PeerID, seckey: PrivateKey): bool {.inline.} =
+  ## Returns ``true`` if ``peerid`` matches private key ``seckey``.
+  result = (peerid == seckey.fromKey())
+
+proc `$`*(peerid: PeerID): string =
+  ## Returns compact string representation of ``peerid``.
+  var pid = peerid.pretty()
+  if len(pid) <= 10:
+    result = pid
+  else:
+    for i in 0..<2:
+      result.add(pid[i])
+    result.add("*")
+    for i in (len(pid) - 6)..(len(pid) - 1):
+      result.add(pid[i])
+
+proc write*(vb: var VBuffer, peerid: PeerID) {.inline.} =
+  ## Write PeerID value ``peerid`` to buffer ``vb``.
+  var p = cast[seq[byte]](peerid)
+  vb.writeSeq(p)
+
+proc initProtoField*(index: int, peerid: PeerID): ProtoField =
+  ## Initialize ProtoField with PeerID ``value``.
+  var p = cast[seq[byte]](peerid)
+  result = initProtoField(index, p)
+
+proc getValue*(data: var ProtoBuffer, field: int, value: var PeerID): int =
+  ## Read ``PeerID`` from ProtoBuf's message and validate it.
+  var buffer: seq[byte]
+  result = getLengthValue(data, field, buffer)
+  if result > 0:
+    value = cast[PeerID](buffer)
+    if not value.validate():
+      result = -1