txvalidator

Documentation

Index

• type Context
  • func (c Context) String() string
• type MapBasedPluginMapper
  • func (m MapBasedPluginMapper) PluginFactoryByName(name PluginName) validation.PluginFactory
• type PluginMapper
• type PluginName
• type PluginValidator
  • func NewPluginValidator(pm PluginMapper, qec QueryExecutorCreator, ...) *PluginValidator
  • func (pv *PluginValidator) ValidateWithPlugin(ctx *Context) error
• type PolicyEvaluator
  • func (id *PolicyEvaluator) DeserializeIdentity(serializedIdentity []byte) (Identity, error)
  • func (id *PolicyEvaluator) Evaluate(policyBytes []byte, signatureSet []*common.SignedData) error
• type Proof
  • func GetProofFromBytes(encProof []byte) (proof Proof)
  • func (proof Proof) VerifyProof(data []byte) bool
  • func (proof Proof) VerifySignature(sigBytes []byte) error
  • func (proof Proof) VerifySignatureWithPath(sigBytes []byte, pkPath string) error
• type QueryExecutorCreator
• type ResultsIteratorImpl
  • func (it *ResultsIteratorImpl) Next() (QueryResult, error)
• type SerializedPolicy
  • func (sp SerializedPolicy) Bytes() []byte
• type StateFetcherImpl
  • func (sf *StateFetcherImpl) FetchState() (State, error)
• type StateImpl
  • func (s *StateImpl) GetStateRangeScanIterator(namespace string, startKey string, endKey string) (ResultsIterator, error)
• type Support
• type TxValidator
  • func NewTxValidator(chainID string, support Support, sccp sysccprovider.SystemChaincodeProvider, ...) *TxValidator
  • func (v *TxValidator) Validate(block *common.Block) error
• type Validator
• type VsccValidatorImpl
  • func (v *VsccValidatorImpl) GetInfoForValidate(chdr *common.ChannelHeader, ccID string) (*sysccprovider.ChaincodeInstance, *sysccprovider.ChaincodeInstance, []byte, ...)
  • func (v *VsccValidatorImpl) VSCCValidateTx(seq int, payload *common.Payload, envBytes []byte, block *common.Block) (error, peer.TxValidationCode)
  • func (v *VsccValidatorImpl) VSCCValidateTxForCC(ctx *Context) error

Types

type Context

type Context struct {
	Seq       int
	Envelope  []byte
	TxID      string
	Channel   string
	VSCCName  string
	Policy    []byte
	Namespace string
	Block     *common.Block
}

Context defines information about a transaction that is being validated

func (Context) String

func (c Context) String() string

String returns a string representation of this Context

type MapBasedPluginMapper

type MapBasedPluginMapper map[string]validation.PluginFactory

MapBasedPluginMapper maps plugin names to their corresponding factories

func (MapBasedPluginMapper) PluginFactoryByName

func (m MapBasedPluginMapper) PluginFactoryByName(name PluginName) validation.PluginFactory

PluginFactoryByName returns a plugin factory for the given plugin name, or nil if not found

type PluginMapper

type PluginMapper interface {
	PluginFactoryByName(name PluginName) validation.PluginFactory
}

PluginMapper maps plugin names to their corresponding factory instance. Returns nil if the name isn't associated to any plugin.

type PluginName

type PluginName string

PluginName defines the name of the plugin as it appears in the configuration

type PluginValidator

type PluginValidator struct {
	sync.Mutex

	PluginMapper
	QueryExecutorCreator
	msp.IdentityDeserializer
	// contains filtered or unexported fields
}

PluginValidator values transactions with validation plugins

func NewPluginValidator

func NewPluginValidator(pm PluginMapper, qec QueryExecutorCreator, deserializer msp.IdentityDeserializer, capabilities Capabilities) *PluginValidator

NewPluginValidator creates a new PluginValidator

func (*PluginValidator) ValidateWithPlugin

func (pv *PluginValidator) ValidateWithPlugin(ctx *Context) error

type PolicyEvaluator

type PolicyEvaluator struct {
	msp.IdentityDeserializer
}

func (*PolicyEvaluator) DeserializeIdentity

func (id *PolicyEvaluator) DeserializeIdentity(serializedIdentity []byte) (Identity, error)

DeserializeIdentity unmarshals the given identity to msp.Identity

func (*PolicyEvaluator) Evaluate

func (id *PolicyEvaluator) Evaluate(policyBytes []byte, signatureSet []*common.SignedData) error

Evaluate takes a set of SignedData and evaluates whether this set of signatures satisfies the policy

type Proof

type Proof struct {
	RootHash  []byte
	ProofSet  [][]byte
	LeafIndex int
	LeafSize  int
	HashAlg   string
}

Proof contains information of MerkleProof of Kafka Cluster

func GetProofFromBytes

func GetProofFromBytes(encProof []byte) (proof Proof)

GetProofFromBytes converts bytes into a Merkle Proof struct. The byte array should be formed as follows hash length (int) | proofSet Size (int) | leafIndex (int) | leafSize (int) | rootHash (byte[]) | proofSet (byte[][]) | hashAlgorithm (String) ref: https://github.com/mar-be/merkle_tree/blob/master/src/main/java/de/marvin/merkletree/Proof.java

func (Proof) VerifyProof

func (proof Proof) VerifyProof(data []byte) bool

VerifyProof verifies that the message is part of the kafka message stream

func (Proof) VerifySignature

func (proof Proof) VerifySignature(sigBytes []byte) error

VerifiySignature verifies that Kafka actually signed the massage

func (Proof) VerifySignatureWithPath

func (proof Proof) VerifySignatureWithPath(sigBytes []byte, pkPath string) error

VerifiySignature verifies that Kafka actually signed the massage

type QueryExecutorCreator

type QueryExecutorCreator interface {
	NewQueryExecutor() (ledger.QueryExecutor, error)
}

QueryExecutorCreator creates new query executors

type ResultsIteratorImpl

type ResultsIteratorImpl struct {
	ledger2.ResultsIterator
}

func (*ResultsIteratorImpl) Next

func (it *ResultsIteratorImpl) Next() (QueryResult, error)

type SerializedPolicy

type SerializedPolicy []byte

SerializedPolicy defines a marshaled policy

func (SerializedPolicy) Bytes

func (sp SerializedPolicy) Bytes() []byte

Bytes returns te bytes of the SerializedPolicy

type StateFetcherImpl

type StateFetcherImpl struct {
	QueryExecutorCreator
}

func (*StateFetcherImpl) FetchState

func (sf *StateFetcherImpl) FetchState() (State, error)

type StateImpl

type StateImpl struct {
	ledger.QueryExecutor
}

func (*StateImpl) GetStateRangeScanIterator

func (s *StateImpl) GetStateRangeScanIterator(namespace string, startKey string, endKey string) (ResultsIterator, error)

type Support

type Support interface {
	// Acquire implements semaphore-like acquire semantics
	Acquire(ctx context.Context, n int64) error

	// Release implements semaphore-like release semantics
	Release(n int64)

	// Ledger returns the ledger associated with this validator
	Ledger() ledger.PeerLedger

	// MSPManager returns the MSP manager for this channel
	MSPManager() msp.MSPManager

	// Apply attempts to apply a configtx to become the new config
	Apply(configtx *common.ConfigEnvelope) error

	// GetMSPIDs returns the IDs for the application MSPs
	// that have been defined in the channel
	GetMSPIDs(cid string) []string

	// Capabilities defines the capabilities for the application portion of this channel
	Capabilities() channelconfig.ApplicationCapabilities
}

Support provides all of the needed to evaluate the VSCC

type TxValidator

type TxValidator struct {
	ChainID string
	Support Support
	Vscc    vsccValidator
	// !!! BEGIN MODIFICATION
	KafkaOffset         int
	NewKafkaOffset      int
	ConnectOrTTCOffsets []int
}

implementation of Validator interface, keeps reference to the ledger to enable tx simulation and execution of vscc

func NewTxValidator

func NewTxValidator(chainID string, support Support, sccp sysccprovider.SystemChaincodeProvider, pm PluginMapper) *TxValidator

NewTxValidator creates new transactions validator

func (*TxValidator) Validate

func (v *TxValidator) Validate(block *common.Block) error

Validate performs the validation of a block. The validation of each transaction in the block is performed in parallel. The approach is as follows: the committer thread starts the tx validation function in a goroutine (using a semaphore to cap the number of concurrent validating goroutines). The committer thread then reads results of validation (in orderer of completion of the goroutines) from the results channel. The goroutines perform the validation of the txs in the block and enqueue the validation result in the results channel. A few note-worthy facts:

1. to keep the approach simple, the committer thread enqueues all transactions in the block and then moves on to reading the results.
2. for parallel validation to work, it is important that the validation function does not change the state of the system. Otherwise the order in which validation is perform matters and we have to resort to sequential validation (or some locking). This is currently true, because the only function that affects state is when a config transaction is received, but they are guaranteed to be alone in the block. If/when this assumption is violated, this code must be changed.

type Validator

type Validator interface {
	Validate(block *common.Block) error
}

Validator interface which defines API to validate block transactions and return the bit array mask indicating invalid transactions which didn't pass validation.

type VsccValidatorImpl

type VsccValidatorImpl struct {
	// contains filtered or unexported fields
}

VsccValidatorImpl is the implementation used to call the vscc chaincode and validate block transactions

func (*VsccValidatorImpl) GetInfoForValidate

func (v *VsccValidatorImpl) GetInfoForValidate(chdr *common.ChannelHeader, ccID string) (*sysccprovider.ChaincodeInstance, *sysccprovider.ChaincodeInstance, []byte, error)

GetInfoForValidate gets the ChaincodeInstance(with latest version) of tx, vscc and policy from lscc

func (*VsccValidatorImpl) VSCCValidateTx

func (v *VsccValidatorImpl) VSCCValidateTx(seq int, payload *common.Payload, envBytes []byte, block *common.Block) (error, peer.TxValidationCode)

VSCCValidateTx executes vscc validation for transaction

func (*VsccValidatorImpl) VSCCValidateTxForCC

func (v *VsccValidatorImpl) VSCCValidateTxForCC(ctx *Context) error