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legacy_oracle.go
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/
legacy_oracle.go
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package hare3
import (
"context"
"errors"
"go.uber.org/zap"
"github.com/spacemeshos/go-spacemesh/common/types"
"github.com/spacemeshos/go-spacemesh/hare3/eligibility"
"github.com/spacemeshos/go-spacemesh/signing"
)
type oracle interface {
Validate(context.Context, types.LayerID, uint32, int, types.NodeID, types.VrfSignature, uint16) (bool, error)
CalcEligibility(context.Context, types.LayerID, uint32, int, types.NodeID, types.VrfSignature) (uint16, error)
}
type legacyOracle struct {
log *zap.Logger
oracle oracle
config Config
}
func (lg *legacyOracle) validate(msg *Message) grade {
if msg.Eligibility.Count == 0 {
return grade0
}
committee := int(lg.config.Committee)
if msg.Round == propose {
committee = int(lg.config.Leaders)
}
valid, err := lg.oracle.Validate(context.Background(),
msg.Layer, msg.Absolute(), committee, msg.Sender,
msg.Eligibility.Proof, msg.Eligibility.Count)
if err != nil {
lg.log.Warn("failed proof validation", zap.Error(err))
return grade0
}
if !valid {
return grade0
}
return grade5
}
func (lg *legacyOracle) active(
signer *signing.EdSigner,
beacon types.Beacon,
layer types.LayerID,
ir IterRound,
) *types.HareEligibility {
vrf := eligibility.GenVRF(context.Background(), signer.VRFSigner(), beacon, layer, ir.Absolute())
committee := int(lg.config.Committee)
if ir.Round == propose {
committee = int(lg.config.Leaders)
}
count, err := lg.oracle.CalcEligibility(context.Background(), layer, ir.Absolute(), committee, signer.NodeID(), vrf)
if err != nil {
if !errors.Is(err, eligibility.ErrNotActive) {
lg.log.Error("failed to compute eligibilities", zap.Error(err))
} else {
lg.log.Debug("identity is not active")
}
return nil
}
if count == 0 {
return nil
}
return &types.HareEligibility{Proof: vrf, Count: count}
}