hopr_path::path

Struct TransportPath

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pub struct TransportPath { /* private fields */ }
Expand description

Represents an off-chain path of PeerIds.

The path is never allowed to be empty and always contains the destination. In case of the direct path, this path contains only the destination. In case o multiple hops, it also must represent a valid ChannelPath, therefore open channels must exist (at the time of construction) except for the last hop.

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impl TransportPath

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pub async fn resolve<R: HoprDbResolverOperations>( peers: Vec<PeerId>, resolver: &R, graph: &ChannelGraph, ) -> Result<(Self, Option<ChannelPath>)>

Resolves vector of PeerIds into the corresponding TransportPath and optionally an associated ChannelPath.

  • If peers contains only a single entry (destination), the resulting TransportPath contains just this entry. Since in this case the ChannelPath would be empty (0-hop), it is None. This case is equivalent to construction with direct().
  • If peers contains more than a single entry, it first resolves PeerIds into Addresses and then validates and returns also the multi-hop ChannelPath.

To do an inverse resolution, from Addresses to PeerIds, construct the ChannelPath and use its to_path() method to resolve the on-chain path. The given resolver is used for the mapping between PeerIds and Addresses.

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pub fn direct(destination: PeerId) -> Self

Constructs a direct TransportPath (= 0-hop ChannelPath)

Trait Implementations§

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impl Clone for TransportPath

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fn clone(&self) -> TransportPath

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TransportPath

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for TransportPath

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for TransportPath

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fn eq(&self, other: &TransportPath) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Path<PeerId> for TransportPath

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fn hops(&self) -> &[PeerId]

The TransportPath always returns one extra hop to the destination. So it contains one more hop than a ChannelPath (the final hop does not require a channel).

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fn length(&self) -> usize

Shorthand for number of hops.
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fn last_hop(&self) -> &N

Gets the last hop
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fn contains_cycle(&self) -> bool

Checks if all the hops in this path are to distinct addresses. Returns true if there are duplicate Addresses on this path. Note that the duplicate Addresses can never be adjacent.
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impl<T> TryFrom<&TransportPath> for Vec<T>
where T: TryFrom<PeerId>,

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type Error = PathError

The type returned in the event of a conversion error.
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fn try_from(value: &TransportPath) -> Result<Self, Self::Error>

Performs the conversion.
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impl Eq for TransportPath

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impl StructuralPartialEq for TransportPath

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