55 lines
1.7 KiB
Nim
55 lines
1.7 KiB
Nim
## Nim-Codex
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## Copyright (c) 2021 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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import std/sequtils
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import std/tables
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import pkg/libp2p
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import pkg/chronos
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import pkg/nitro
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import pkg/questionable
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import ../protobuf/blockexc
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import ../protobuf/payments
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import ../protobuf/presence
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export payments, nitro
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type
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BlockExcPeerCtx* = ref object of RootObj
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id*: PeerID
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peerPrices*: Table[Cid, UInt256] # remote peer have list including price
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peerWants*: seq[Entry] # remote peers want lists
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exchanged*: int # times peer has exchanged with us
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lastExchange*: Moment # last time peer has exchanged with us
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account*: ?Account # ethereum account of this peer
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paymentChannel*: ?ChannelId # payment channel id
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proc peerHave*(context: BlockExcPeerCtx): seq[Cid] =
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toSeq(context.peerPrices.keys)
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proc contains*(a: openArray[BlockExcPeerCtx], b: PeerID): bool =
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## Convenience method to check for peer prepense
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##
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a.anyIt( it.id == b )
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func updatePresence*(context: BlockExcPeerCtx, presence: Presence) =
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let cid = presence.cid
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let price = presence.price
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if cid notin context.peerHave and presence.have:
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context.peerPrices[cid] = price
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elif cid in context.peerHave and not presence.have:
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context.peerPrices.del(cid)
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func price*(context: BlockExcPeerCtx, cids: seq[Cid]): UInt256 =
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for cid in cids:
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if price =? context.peerPrices.?[cid]:
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result += price
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