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, }, } }