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package types
import (
"errors"
"fmt"
"time"
"github.com/tendermint/tendermint/crypto/tmhash"
tmstrings "github.com/tendermint/tendermint/libs/strings"
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
)
const (
// MaxBlockSizeBytes is the maximum permitted size of the blocks.
MaxBlockSizeBytes = 104857600 // 100MB
// BlockPartSizeBytes is the size of one block part.
BlockPartSizeBytes uint32 = 65536 // 64kB
// MaxBlockPartsCount is the maximum number of block parts.
MaxBlockPartsCount = (MaxBlockSizeBytes / BlockPartSizeBytes) + 1
)
// ConsensusParams contains consensus critical parameters that determine the
// validity of blocks.
type ConsensusParams struct {
Block BlockParams `json:"block"`
Evidence EvidenceParams `json:"evidence"`
Validator ValidatorParams `json:"validator"`
Version VersionParams `json:"version"`
}
// HashedParams is a subset of ConsensusParams.
// It is amino encoded and hashed into
// the Header.ConsensusHash.
type HashedParams struct {
BlockMaxBytes int64
BlockMaxGas int64
}
// BlockParams define limits on the block size and gas plus minimum time
// between blocks.
type BlockParams struct {
MaxBytes int64 `json:"max_bytes"`
MaxGas int64 `json:"max_gas"`
}
// EvidenceParams determine how we handle evidence of malfeasance.
type EvidenceParams struct {
MaxAgeNumBlocks int64 `json:"max_age_num_blocks"` // only accept new evidence more recent than this
MaxAgeDuration time.Duration `json:"max_age_duration"`
MaxBytes int64 `json:"max_bytes"`
}
// ValidatorParams restrict the public key types validators can use.
// NOTE: uses ABCI pubkey naming, not Amino names.
type ValidatorParams struct {
PubKeyTypes []string `json:"pub_key_types"`
}
type VersionParams struct {
AppVersion uint64 `json:"app_version"`
}
// DefaultConsensusParams returns a default ConsensusParams.
func DefaultConsensusParams() *ConsensusParams {
return &ConsensusParams{
Block: DefaultBlockParams(),
Evidence: DefaultEvidenceParams(),
Validator: DefaultValidatorParams(),
Version: DefaultVersionParams(),
}
}
// DefaultBlockParams returns a default BlockParams.
func DefaultBlockParams() BlockParams {
return BlockParams{
MaxBytes: 22020096, // 21MB
MaxGas: -1,
}
}
// DefaultEvidenceParams returns a default EvidenceParams.
func DefaultEvidenceParams() EvidenceParams {
return EvidenceParams{
MaxAgeNumBlocks: 100000, // 27.8 hrs at 1block/s
MaxAgeDuration: 48 * time.Hour,
MaxBytes: 1048576, // 1MB
}
}
// DefaultValidatorParams returns a default ValidatorParams, which allows
// only ed25519 pubkeys.
func DefaultValidatorParams() ValidatorParams {
return ValidatorParams{
PubKeyTypes: []string{ABCIPubKeyTypeEd25519},
}
}
func DefaultVersionParams() VersionParams {
return VersionParams{
AppVersion: 0,
}
}
func (val *ValidatorParams) IsValidPubkeyType(pubkeyType string) bool {
for i := 0; i < len(val.PubKeyTypes); i++ {
if val.PubKeyTypes[i] == pubkeyType {
return true
}
}
return false
}
// Validate validates the ConsensusParams to ensure all values are within their
// allowed limits, and returns an error if they are not.
func (params ConsensusParams) ValidateConsensusParams() error {
if params.Block.MaxBytes <= 0 {
return fmt.Errorf("block.MaxBytes must be greater than 0. Got %d",
params.Block.MaxBytes)
}
if params.Block.MaxBytes > MaxBlockSizeBytes {
return fmt.Errorf("block.MaxBytes is too big. %d > %d",
params.Block.MaxBytes, MaxBlockSizeBytes)
}
if params.Block.MaxGas < -1 {
return fmt.Errorf("block.MaxGas must be greater or equal to -1. Got %d",
params.Block.MaxGas)
}
if params.Evidence.MaxAgeNumBlocks <= 0 {
return fmt.Errorf("evidence.MaxAgeNumBlocks must be greater than 0. Got %d",
params.Evidence.MaxAgeNumBlocks)
}
if params.Evidence.MaxAgeDuration <= 0 {
return fmt.Errorf("evidence.MaxAgeDuration must be grater than 0 if provided, Got %v",
params.Evidence.MaxAgeDuration)
}
if params.Evidence.MaxBytes > params.Block.MaxBytes {
return fmt.Errorf("evidence.MaxBytesEvidence is greater than upper bound, %d > %d",
params.Evidence.MaxBytes, params.Block.MaxBytes)
}
if params.Evidence.MaxBytes < 0 {
return fmt.Errorf("evidence.MaxBytes must be non negative. Got: %d",
params.Evidence.MaxBytes)
}
if len(params.Validator.PubKeyTypes) == 0 {
return errors.New("len(Validator.PubKeyTypes) must be greater than 0")
}
// Check if keyType is a known ABCIPubKeyType
for i := 0; i < len(params.Validator.PubKeyTypes); i++ {
keyType := params.Validator.PubKeyTypes[i]
if _, ok := ABCIPubKeyTypesToNames[keyType]; !ok {
return fmt.Errorf("params.Validator.PubKeyTypes[%d], %s, is an unknown pubkey type",
i, keyType)
}
}
return nil
}
// Hash returns a hash of a subset of the parameters to store in the block header.
// Only the Block.MaxBytes and Block.MaxGas are included in the hash.
// This allows the ConsensusParams to evolve more without breaking the block
// protocol. No need for a Merkle tree here, just a small struct to hash.
func (params ConsensusParams) HashConsensusParams() []byte {
hasher := tmhash.New()
hp := tmproto.HashedParams{
BlockMaxBytes: params.Block.MaxBytes,
BlockMaxGas: params.Block.MaxGas,
}
bz, err := hp.Marshal()
if err != nil {
panic(err)
}
_, err = hasher.Write(bz)
if err != nil {
panic(err)
}
return hasher.Sum(nil)
}
func (params *ConsensusParams) Equals(params2 *ConsensusParams) bool {
return params.Block == params2.Block &&
params.Evidence == params2.Evidence &&
tmstrings.StringSliceEqual(params.Validator.PubKeyTypes, params2.Validator.PubKeyTypes)
}
// Update returns a copy of the params with updates from the non-zero fields of p2.
// NOTE: note: must not modify the original
func (params ConsensusParams) UpdateConsensusParams(params2 *tmproto.ConsensusParams) ConsensusParams {
res := params // explicit copy
if params2 == nil {
return res
}
// we must defensively consider any structs may be nil
if params2.Block != nil {
res.Block.MaxBytes = params2.Block.MaxBytes
res.Block.MaxGas = params2.Block.MaxGas
}
if params2.Evidence != nil {
res.Evidence.MaxAgeNumBlocks = params2.Evidence.MaxAgeNumBlocks
res.Evidence.MaxAgeDuration = params2.Evidence.MaxAgeDuration
res.Evidence.MaxBytes = params2.Evidence.MaxBytes
}
if params2.Validator != nil {
// Copy params2.Validator.PubkeyTypes, and set result's value to the copy.
// This avoids having to initialize the slice to 0 values, and then write to it again.
res.Validator.PubKeyTypes = append([]string{}, params2.Validator.PubKeyTypes...)
}
if params2.Version != nil {
res.Version.AppVersion = params2.Version.AppVersion
}
return res
}
func (params *ConsensusParams) ToProto() tmproto.ConsensusParams {
return tmproto.ConsensusParams{
Block: &tmproto.BlockParams{
MaxBytes: params.Block.MaxBytes,
MaxGas: params.Block.MaxGas,
},
Evidence: &tmproto.EvidenceParams{
MaxAgeNumBlocks: params.Evidence.MaxAgeNumBlocks,
MaxAgeDuration: params.Evidence.MaxAgeDuration,
MaxBytes: params.Evidence.MaxBytes,
},
Validator: &tmproto.ValidatorParams{
PubKeyTypes: params.Validator.PubKeyTypes,
},
Version: &tmproto.VersionParams{
AppVersion: params.Version.AppVersion,
},
}
}
func ConsensusParamsFromProto(pbParams tmproto.ConsensusParams) ConsensusParams {
return ConsensusParams{
Block: BlockParams{
MaxBytes: pbParams.Block.MaxBytes,
MaxGas: pbParams.Block.MaxGas,
},
Evidence: EvidenceParams{
MaxAgeNumBlocks: pbParams.Evidence.MaxAgeNumBlocks,
MaxAgeDuration: pbParams.Evidence.MaxAgeDuration,
MaxBytes: pbParams.Evidence.MaxBytes,
},
Validator: ValidatorParams{
PubKeyTypes: pbParams.Validator.PubKeyTypes,
},
Version: VersionParams{
AppVersion: pbParams.Version.AppVersion,
},
}
}