46 lines
1.0 KiB
Nim
46 lines
1.0 KiB
Nim
import libp2p
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import pkg/stint
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import pkg/questionable
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import pkg/questionable/results
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import pkg/upraises
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import ./blockexc
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export questionable
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export stint
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export BlockPresenceType
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upraises.push: {.upraises: [].}
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type
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PresenceMessage* = blockexc.BlockPresence
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Presence* = object
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cid*: Cid
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have*: bool
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price*: UInt256
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func parse(_: type UInt256, bytes: seq[byte]): ?UInt256 =
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if bytes.len > 32:
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return UInt256.none
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UInt256.fromBytesBE(bytes).some
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func init*(_: type Presence, message: PresenceMessage): ?Presence =
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without cid =? Cid.init(message.cid) and
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price =? UInt256.parse(message.price):
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return none Presence
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some Presence(
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cid: cid,
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have: message.`type` == BlockPresenceType.Have,
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price: price
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)
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func init*(_: type PresenceMessage, presence: Presence): PresenceMessage =
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PresenceMessage(
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cid: presence.cid.data.buffer,
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`type`: if presence.have:
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BlockPresenceType.Have
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else:
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BlockPresenceType.DontHave,
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price: @(presence.price.toBytesBE)
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)
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