frostfs-node/pkg/services/reputation/eigentrust/calculator/deps.go

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package eigentrustcalc
import (
"context"
"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
"github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust"
apireputation "github.com/nspcc-dev/neofs-sdk-go/reputation"
)
type Context interface {
context.Context
// Must return epoch number to select the values
// for global trust calculation.
Epoch() uint64
// Must return the sequence number of the iteration.
I() uint32
}
// InitialTrustSource must provide initial(non-calculated)
// trusts to current node's daughter. Realization may depends
// on daughter.
type InitialTrustSource interface {
InitialTrust(apireputation.PeerID) (reputation.TrustValue, error)
}
// TrustIterator must iterate over all retrieved(or calculated) trusts
// and call passed TrustHandler on them.
type TrustIterator interface {
Iterate(reputation.TrustHandler) error
}
type PeerTrustsHandler func(apireputation.PeerID, TrustIterator) error
// PeerTrustsIterator must iterate over all nodes(PeerIDs) and provide
// TrustIterator for iteration over node's Trusts to others peers.
type PeerTrustsIterator interface {
Iterate(PeerTrustsHandler) error
}
type DaughterTrustIteratorProvider interface {
// InitDaughterIterator must init TrustIterator
// that iterates over received local trusts from
// daughter p for ctx.Epoch() epoch.
InitDaughterIterator(ctx Context, p apireputation.PeerID) (TrustIterator, error)
// InitAllDaughtersIterator must init PeerTrustsIterator
// that must iterate over all daughters of the current
// node(manager) and all trusts received from them for
// ctx.Epoch() epoch.
InitAllDaughtersIterator(ctx Context) (PeerTrustsIterator, error)
// InitConsumersIterator must init PeerTrustsIterator
// that must iterate over all daughters of the current
// node(manager) and their consumers' trusts received
// from other managers for ctx.Epoch() epoch and
// ctx.I() iteration.
InitConsumersIterator(Context) (PeerTrustsIterator, error)
}
// IntermediateWriter must write intermediate result to contract.
// It may depends on realization either trust is sent directly to contract
// or via redirecting to other node.
type IntermediateWriter interface {
WriteIntermediateTrust(eigentrust.IterationTrust) error
}
// IntermediateWriterProvider must provide ready-to-work
// IntermediateWriter.
type IntermediateWriterProvider interface {
InitIntermediateWriter(Context) (IntermediateWriter, error)
}
// AlphaProvider must provide information about required
// alpha parameter for eigen trust algorithm.
type AlphaProvider interface {
EigenTrustAlpha() (float64, error)
}