interface.go 1.47 KB
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package network

import (
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	context "github.com/ipfs/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
	bsmsg "github.com/ipfs/go-ipfs/exchange/bitswap/message"
	peer "github.com/ipfs/go-ipfs/p2p/peer"
	protocol "github.com/ipfs/go-ipfs/p2p/protocol"
	u "github.com/ipfs/go-ipfs/util"
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)

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var ProtocolBitswap protocol.ID = "/ipfs/bitswap"

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// BitSwapNetwork provides network connectivity for BitSwap sessions
type BitSwapNetwork interface {
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	// SendMessage sends a BitSwap message to a peer.
	SendMessage(
		context.Context,
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		peer.ID,
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		bsmsg.BitSwapMessage) error

	// SendRequest sends a BitSwap message to a peer and waits for a response.
	SendRequest(
		context.Context,
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		peer.ID,
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		bsmsg.BitSwapMessage) (incoming bsmsg.BitSwapMessage, err error)

	// SetDelegate registers the Reciver to handle messages received from the
	// network.
	SetDelegate(Receiver)
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	Routing
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}

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// Implement Receiver to receive messages from the BitSwapNetwork
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type Receiver interface {
	ReceiveMessage(
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		ctx context.Context, sender peer.ID, incoming bsmsg.BitSwapMessage) (
		destination peer.ID, outgoing bsmsg.BitSwapMessage)
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	ReceiveError(error)
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	// Connected/Disconnected warns bitswap about peer connections
	PeerConnected(peer.ID)
	PeerDisconnected(peer.ID)
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}

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type Routing interface {
	// FindProvidersAsync returns a channel of providers for the given key
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	FindProvidersAsync(context.Context, u.Key, int) <-chan peer.ID
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	// Provide provides the key to the network
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	Provide(context.Context, u.Key) error
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}