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package types
import (
"bytes"
"fmt"
"github.com/tendermint/tendermint/crypto/tmhash"
"github.com/tendermint/tendermint/crypto"
cmn "github.com/tendermint/tendermint/libs/common"
)
// Volatile state for each Validator
// NOTE: The ProposerPriority is not included in Validator.Hash();
// make sure to update that method if changes are made here
type Validator struct {
Address Address `json:"address"`
PubKey crypto.PubKey `json:"pub_key"`
VotingPower int64 `json:"voting_power"`
ProposerPriority int64 `json:"proposer_priority"`
}
func NewValidator(pubKey crypto.PubKey, votingPower int64) *Validator {
return &Validator{
Address: pubKey.Address(),
PubKey: pubKey,
VotingPower: votingPower,
ProposerPriority: 0,
}
}
// Creates a new copy of the validator so we can mutate ProposerPriority.
// Panics if the validator is nil.
func (v *Validator) Copy() *Validator {
vCopy := *v
return &vCopy
}
// Returns the one with higher ProposerPriority.
func (v *Validator) CompareProposerPriority(other *Validator) *Validator {
if v == nil {
return other
}
if v.ProposerPriority > other.ProposerPriority {
return v
} else if v.ProposerPriority < other.ProposerPriority {
return other
} else {
result := bytes.Compare(v.Address, other.Address)
if result < 0 {
return v
} else if result > 0 {
return other
} else {
cmn.PanicSanity("Cannot compare identical validators")
return nil
}
}
}
func (v *Validator) String() string {
if v == nil {
return "nil-Validator"
}
return fmt.Sprintf("Validator{%v %v VP:%v A:%v}",
v.Address,
v.PubKey,
v.VotingPower,
v.ProposerPriority)
}
// Hash computes the unique ID of a validator with a given voting power.
// It excludes the ProposerPriority value, which changes with every round.
func (v *Validator) Hash() []byte {
return tmhash.Sum(v.Bytes())
}
// Bytes computes the unique encoding of a validator with a given voting power.
// These are the bytes that gets hashed in consensus. It excludes address
// as its redundant with the pubkey. This also excludes ProposerPriority
// which changes every round.
func (v *Validator) Bytes() []byte {
return cdcEncode(struct {
PubKey crypto.PubKey
VotingPower int64
}{
v.PubKey,
v.VotingPower,
})
}
//----------------------------------------
// RandValidator
// RandValidator returns a randomized validator, useful for testing.
// UNSTABLE
func RandValidator(randPower bool, minPower int64) (*Validator, PrivValidator) {
privVal := NewMockPV()
votePower := minPower
if randPower {
votePower += int64(cmn.RandUint32())
}
pubKey := privVal.GetPubKey()
val := NewValidator(pubKey, votePower)
return val, privVal
}