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package types
import (
"bytes"
"fmt"
"strings"
"github.com/tendermint/tendermint/crypto"
tmrand "github.com/tendermint/tendermint/libs/rand"
)
// 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
}
switch {
case v.ProposerPriority > other.ProposerPriority:
return v
case v.ProposerPriority < other.ProposerPriority:
return other
default:
result := bytes.Compare(v.Address, other.Address)
switch {
case result < 0:
return v
case result > 0:
return other
default:
panic("Cannot compare identical validators")
}
}
}
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)
}
// ValidatorListString returns a prettified validator list for logging purposes.
func ValidatorListString(vals []*Validator) string {
chunks := make([]string, len(vals))
for i, val := range vals {
chunks[i] = fmt.Sprintf("%s:%d", val.Address, val.VotingPower)
}
return strings.Join(chunks, ",")
}
// 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(tmrand.Uint32())
}
pubKey := privVal.GetPubKey()
val := NewValidator(pubKey, votePower)
return val, privVal
}