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173 lines
4.0 KiB
173 lines
4.0 KiB
package types
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import (
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"bytes"
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"errors"
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"fmt"
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"strings"
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"github.com/tendermint/tendermint/crypto"
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ce "github.com/tendermint/tendermint/crypto/encoding"
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tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
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)
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// Volatile state for each Validator
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// NOTE: The ProposerPriority is not included in Validator.Hash();
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// make sure to update that method if changes are made here
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type Validator struct {
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Address Address `json:"address"`
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PubKey crypto.PubKey `json:"pub_key"`
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VotingPower int64 `json:"voting_power"`
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ProposerPriority int64 `json:"proposer_priority"`
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}
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// NewValidator returns a new validator with the given pubkey and voting power.
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func NewValidator(pubKey crypto.PubKey, votingPower int64) *Validator {
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return &Validator{
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Address: pubKey.Address(),
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PubKey: pubKey,
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VotingPower: votingPower,
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ProposerPriority: 0,
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}
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}
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// ValidateBasic performs basic validation.
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func (v *Validator) ValidateBasic() error {
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if v == nil {
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return errors.New("nil validator")
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}
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if v.PubKey == nil {
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return errors.New("validator does not have a public key")
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}
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if v.VotingPower < 0 {
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return errors.New("validator has negative voting power")
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}
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if len(v.Address) != crypto.AddressSize {
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return fmt.Errorf("validator address is the wrong size: %v", v.Address)
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}
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return nil
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}
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// Creates a new copy of the validator so we can mutate ProposerPriority.
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// Panics if the validator is nil.
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func (v *Validator) Copy() *Validator {
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vCopy := *v
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return &vCopy
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}
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// Returns the one with higher ProposerPriority.
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func (v *Validator) CompareProposerPriority(other *Validator) *Validator {
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if v == nil {
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return other
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}
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switch {
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case v.ProposerPriority > other.ProposerPriority:
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return v
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case v.ProposerPriority < other.ProposerPriority:
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return other
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default:
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result := bytes.Compare(v.Address, other.Address)
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switch {
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case result < 0:
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return v
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case result > 0:
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return other
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default:
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panic("Cannot compare identical validators")
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}
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}
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}
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// String returns a string representation of String.
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//
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// 1. address
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// 2. public key
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// 3. voting power
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// 4. proposer priority
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func (v *Validator) String() string {
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if v == nil {
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return "nil-Validator"
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}
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return fmt.Sprintf("Validator{%v %v VP:%v A:%v}",
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v.Address,
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v.PubKey,
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v.VotingPower,
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v.ProposerPriority)
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}
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// ValidatorListString returns a prettified validator list for logging purposes.
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func ValidatorListString(vals []*Validator) string {
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chunks := make([]string, len(vals))
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for i, val := range vals {
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chunks[i] = fmt.Sprintf("%s:%d", val.Address, val.VotingPower)
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}
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return strings.Join(chunks, ",")
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}
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// Bytes computes the unique encoding of a validator with a given voting power.
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// These are the bytes that gets hashed in consensus. It excludes address
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// as its redundant with the pubkey. This also excludes ProposerPriority
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// which changes every round.
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func (v *Validator) Bytes() []byte {
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pk, err := ce.PubKeyToProto(v.PubKey)
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if err != nil {
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panic(err)
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}
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pbv := tmproto.SimpleValidator{
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PubKey: &pk,
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VotingPower: v.VotingPower,
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}
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bz, err := pbv.Marshal()
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if err != nil {
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panic(err)
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}
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return bz
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}
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// ToProto converts Valiator to protobuf
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func (v *Validator) ToProto() (*tmproto.Validator, error) {
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if v == nil {
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return nil, errors.New("nil validator")
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}
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pk, err := ce.PubKeyToProto(v.PubKey)
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if err != nil {
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return nil, err
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}
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vp := tmproto.Validator{
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Address: v.Address,
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PubKey: pk,
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VotingPower: v.VotingPower,
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ProposerPriority: v.ProposerPriority,
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}
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return &vp, nil
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}
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// FromProto sets a protobuf Validator to the given pointer.
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// It returns an error if the public key is invalid.
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func ValidatorFromProto(vp *tmproto.Validator) (*Validator, error) {
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if vp == nil {
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return nil, errors.New("nil validator")
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}
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pk, err := ce.PubKeyFromProto(vp.PubKey)
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if err != nil {
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return nil, err
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}
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v := new(Validator)
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v.Address = vp.GetAddress()
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v.PubKey = pk
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v.VotingPower = vp.GetVotingPower()
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v.ProposerPriority = vp.GetProposerPriority()
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return v, nil
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}
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