Merge branch 'tmp'

.gitmodules

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+[submodule "third_party/nwaku"]
+	path = third_party/nwaku
+	url = https://github.com/waku-org/nwaku

common/README.md

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+# Waku Common
+
+[See here](../README.md#common)

common/const.go

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+// Copyright 2019 The Waku Library Authors.
+//
+// The Waku library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The Waku library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty off
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the Waku library. If not, see <http://www.gnu.org/licenses/>.
+//
+// This software uses the go-ethereum library, which is licensed
+// under the GNU Lesser General Public Library, version 3 or any later.
+
+package common
+
+// Waku protocol parameters
+const (
+	TopicLength  = 4  // in bytes
+	AESKeyLength = 32 // in bytes
+	KeyIDSize    = 32 // in bytes
+
+	DefaultMaxMessageSize = uint32(1 << 20) // DefaultMaximumMessageSize is 1mb.
+)

common/events.go

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+// Copyright 2019 The Waku Library Authors.
+//
+// The Waku library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The Waku library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty off
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the Waku library. If not, see <http://www.gnu.org/licenses/>.
+//
+// This software uses the go-ethereum library, which is licensed
+// under the GNU Lesser General Public Library, version 3 or any later.
+
+package common
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/p2p/enode"
+)
+
+// EventType used to define known waku events.
+type EventType string
+
+const (
+	// EventEnvelopeSent fires when envelope was sent to a peer.
+	EventEnvelopeSent EventType = "envelope.sent"
+
+	// EventEnvelopeExpired fires when envelop expired
+	EventEnvelopeExpired EventType = "envelope.expired"
+
+	// EventEnvelopeReceived is sent once envelope was received from a peer.
+	// EventEnvelopeReceived must be sent to the feed even if envelope was previously in the cache.
+	// And event, ideally, should contain information about peer that sent envelope to us.
+	EventEnvelopeReceived EventType = "envelope.received"
+
+	// EventBatchAcknowledged is sent when batch of envelopes was acknowledged by a peer.
+	EventBatchAcknowledged EventType = "batch.acknowledged"
+
+	// EventEnvelopeAvailable fires when envelop is available for filters
+	EventEnvelopeAvailable EventType = "envelope.available"
+)
+
+// EnvelopeEvent represents an envelope event.
+type EnvelopeEvent struct {
+	Event EventType
+	Topic TopicType
+	Hash  common.Hash
+	Batch common.Hash
+	Peer  enode.ID
+	Data  interface{}
+}