shim

package
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 Go to latest Published: Oct 19, 2020 License: Apache-2.0 Imports: 24 Imported by: 0

Documentation

Overview

Package shim provides APIs for the chaincode to access its state variables, transaction context and call other chaincodes.

Package shim provides APIs for the chaincode to access its state variables, transaction context and call other chaincodes.

Index

Constants

View Source 
const (
	STATE_QUERY_RESULT resultType = iota + 1
	HISTORY_QUERY_RESULT
)
View Source 
const (
	LogDebug    = LoggingLevel(logging.DEBUG)
	LogInfo     = LoggingLevel(logging.INFO)
	LogNotice   = LoggingLevel(logging.NOTICE)
	LogWarning  = LoggingLevel(logging.WARNING)
	LogError    = LoggingLevel(logging.ERROR)
	LogCritical = LoggingLevel(logging.CRITICAL)
)

These constants comprise the LoggingLevel enumeration

View Source 
const (
	// OK constant - status code less than 400, endorser will endorse it.
	// OK means init or invoke successfully.
	OK = 200

	// ERRORTHRESHOLD constant - status code greater than or equal to 400 will be considered an error and rejected by endorser.
	ERRORTHRESHOLD = 400

	// ERROR constant - default error value
	ERROR = 500
)

Variables

This section is empty.

Functions

func Error 

func Error(msg string) pb.Response

func IsEnabledForLogLevel 

func IsEnabledForLogLevel(logLevel string) bool

IsEnabledForLogLevel checks to see if the chaincodeLogger is enabled for a specific logging level used primarily for testing

func SetLoggingLevel 

func SetLoggingLevel(level LoggingLevel)

SetLoggingLevel allows a Go language chaincode to set the logging level of its shim.

func SetupChaincodeLogging 

func SetupChaincodeLogging()

SetupChaincodeLogging sets the chaincode logging format and the level to the values of CORE_CHAINCODE_LOGGING_FORMAT, CORE_CHAINCODE_LOGGING_LEVEL and CORE_CHAINCODE_LOGGING_SHIM set from core.yaml by chaincode_support.go

func Start 

func Start(cc Chaincode) error

chaincodes.

func StartInProc 

func StartInProc(env []string, args []string, cc Chaincode, recv <-chan *pb.ChaincodeMessage, send chan<- *pb.ChaincodeMessage) error

StartInProc is an entry point for system chaincodes bootstrap. It is not an API for chaincodes.

func Success 

func Success(payload []byte) pb.Response

Types

type Chaincode 

type Chaincode interface {
	// Init is called during Instantiate transaction after the chaincode container
	// has been established for the first time, allowing the chaincode to
	// initialize its internal data
	// Init()方法在首次建立链码容器后负责实例化，并初始化数据
	Init(stub ChaincodeStubInterface) pb.Response

	// Invoke is called to update or query the ledger in a proposal transaction.
	// Updated state variables are not committed to the ledger until the
	// transaction is committed.
	// 一次交易提案会通过调用Invoke()方法执行，包括查询或者更新账本
	// 交易成功提交后，更新的状态变量才会提交到账本中
	Invoke(stub ChaincodeStubInterface) pb.Response
}

Chaincode interface must be implemented by all chaincodes. The fabric runs the transactions by calling these functions as specified. 所有链码必须实现Chaincode接口的Init()和Invoke()方法， 并且fabric需要调用这两个方法来执行交易逻辑

type ChaincodeLogger 

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

ChaincodeLogger is an abstraction of a logging object for use by chaincodes. These objects are created by the NewLogger API.

func NewLogger 

func NewLogger(name string) *ChaincodeLogger

NewLogger allows a Go language chaincode to create one or more logging objects whose logs will be formatted consistently with, and temporally interleaved with the logs created by the shim interface. The logs created by this object can be distinguished from shim logs by the name provided, which will appear in the logs.

func (*ChaincodeLogger) Critical 

func (c *ChaincodeLogger) Critical(args ...interface{})

Critical logs always appear; They can not be disabled.

func (*ChaincodeLogger) Criticalf 

func (c *ChaincodeLogger) Criticalf(format string, args ...interface{})

Criticalf logs always appear; They can not be disabled.

func (*ChaincodeLogger) Debug 

func (c *ChaincodeLogger) Debug(args ...interface{})

Debug logs will only appear if the ChaincodeLogger LoggingLevel is set to LogDebug.

func (*ChaincodeLogger) Debugf 

func (c *ChaincodeLogger) Debugf(format string, args ...interface{})

Debugf logs will only appear if the ChaincodeLogger LoggingLevel is set to LogDebug.

func (*ChaincodeLogger) Error 

func (c *ChaincodeLogger) Error(args ...interface{})

Error logs will appear if the ChaincodeLogger LoggingLevel is set to LogError, LogWarning, LogNotice, LogInfo or LogDebug.

func (*ChaincodeLogger) Errorf 

func (c *ChaincodeLogger) Errorf(format string, args ...interface{})

Errorf logs will appear if the ChaincodeLogger LoggingLevel is set to LogError, LogWarning, LogNotice, LogInfo or LogDebug.

func (*ChaincodeLogger) Info 

func (c *ChaincodeLogger) Info(args ...interface{})

Info logs will appear if the ChaincodeLogger LoggingLevel is set to LogInfo or LogDebug.

func (*ChaincodeLogger) Infof 

func (c *ChaincodeLogger) Infof(format string, args ...interface{})

Infof logs will appear if the ChaincodeLogger LoggingLevel is set to LogInfo or LogDebug.

func (*ChaincodeLogger) IsEnabledFor 

func (c *ChaincodeLogger) IsEnabledFor(level LoggingLevel) bool

IsEnabledFor returns true if the logger is enabled to creates logs at the given logging level.

func (*ChaincodeLogger) Notice 

func (c *ChaincodeLogger) Notice(args ...interface{})

Notice logs will appear if the ChaincodeLogger LoggingLevel is set to LogNotice, LogInfo or LogDebug.

func (*ChaincodeLogger) Noticef 

func (c *ChaincodeLogger) Noticef(format string, args ...interface{})

Noticef logs will appear if the ChaincodeLogger LoggingLevel is set to LogNotice, LogInfo or LogDebug.

func (*ChaincodeLogger) SetLevel 

func (c *ChaincodeLogger) SetLevel(level LoggingLevel)

SetLevel sets the logging level for a chaincode logger. Note that currently the levels are actually controlled by the name given when the logger is created, so loggers should be given unique names other than "shim".

func (*ChaincodeLogger) Warning 

func (c *ChaincodeLogger) Warning(args ...interface{})

Warning logs will appear if the ChaincodeLogger LoggingLevel is set to LogWarning, LogNotice, LogInfo or LogDebug.

func (*ChaincodeLogger) Warningf 

func (c *ChaincodeLogger) Warningf(format string, args ...interface{})

Warningf logs will appear if the ChaincodeLogger LoggingLevel is set to LogWarning, LogNotice, LogInfo or LogDebug.

type ChaincodeStub 

type ChaincodeStub struct {
	TxID      string
	ChannelId string
	// contains filtered or unexported fields
}

ChaincodeStub is an object passed to chaincode for shim side handling of APIs.

func (*ChaincodeStub) CreateCompositeKey 

func (stub *ChaincodeStub) CreateCompositeKey(objectType string, attributes []string) (string, error)

CreateCompositeKey documentation can be found in interfaces.go

func (*ChaincodeStub) DelPrivateData 

func (stub *ChaincodeStub) DelPrivateData(collection string, key string) error

DelPrivateData documentation can be found in interfaces.go

func (*ChaincodeStub) DelState 

func (stub *ChaincodeStub) DelState(key string) error

DelState documentation can be found in interfaces.go

func (*ChaincodeStub) GetArgs 

func (stub *ChaincodeStub) GetArgs() [][]byte

GetArgs documentation can be found in interfaces.go

func (*ChaincodeStub) GetArgsSlice 

func (stub *ChaincodeStub) GetArgsSlice() ([]byte, error)

GetArgsSlice documentation can be found in interfaces.go

func (*ChaincodeStub) GetBinding 

func (stub *ChaincodeStub) GetBinding() ([]byte, error)

GetBinding documentation can be found in interfaces.go

func (*ChaincodeStub) GetChannelID 

func (stub *ChaincodeStub) GetChannelID() string

GetChannelID returns the channel for the proposal

func (*ChaincodeStub) GetCreator 

func (stub *ChaincodeStub) GetCreator() ([]byte, error)

GetCreator documentation can be found in interfaces.go

func (*ChaincodeStub) GetDecorations 

func (stub *ChaincodeStub) GetDecorations() map[string][]byte

func (*ChaincodeStub) GetFunctionAndParameters 

func (stub *ChaincodeStub) GetFunctionAndParameters() (function string, params []string)

GetFunctionAndParameters documentation can be found in interfaces.go

func (*ChaincodeStub) GetHistoryForKey 

func (stub *ChaincodeStub) GetHistoryForKey(key string) (HistoryQueryIteratorInterface, error)

GetHistoryForKey documentation can be found in interfaces.go

func (*ChaincodeStub) GetPrivateData 

func (stub *ChaincodeStub) GetPrivateData(collection string, key string) ([]byte, error)

GetPrivateData documentation can be found in interfaces.go

func (*ChaincodeStub) GetPrivateDataByPartialCompositeKey 

func (stub *ChaincodeStub) GetPrivateDataByPartialCompositeKey(collection, objectType string, attributes []string) (StateQueryIteratorInterface, error)

GetPrivateDataByPartialCompositeKey documentation can be found in interfaces.go

func (*ChaincodeStub) GetPrivateDataByRange 

func (stub *ChaincodeStub) GetPrivateDataByRange(collection, startKey, endKey string) (StateQueryIteratorInterface, error)

GetPrivateDataByRange documentation can be found in interfaces.go

func (*ChaincodeStub) GetPrivateDataHash 

func (stub *ChaincodeStub) GetPrivateDataHash(collection string, key string) ([]byte, error)

GetPrivateDataHash documentation can be found in interfaces.go

func (*ChaincodeStub) GetPrivateDataQueryResult 

func (stub *ChaincodeStub) GetPrivateDataQueryResult(collection, query string) (StateQueryIteratorInterface, error)

GetPrivateDataQueryResult documentation can be found in interfaces.go

func (*ChaincodeStub) GetPrivateDataValidationParameter 

func (stub *ChaincodeStub) GetPrivateDataValidationParameter(collection, key string) ([]byte, error)

GetPrivateDataValidationParameter documentation can be found in interfaces.go

func (*ChaincodeStub) GetQueryResult 

func (stub *ChaincodeStub) GetQueryResult(query string) (StateQueryIteratorInterface, error)

GetQueryResult documentation can be found in interfaces.go

func (*ChaincodeStub) GetQueryResultWithPagination 

func (stub *ChaincodeStub) GetQueryResultWithPagination(query string, pageSize int32,
	bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

func (*ChaincodeStub) GetSignedProposal 

func (stub *ChaincodeStub) GetSignedProposal() (*pb.SignedProposal, error)

GetSignedProposal documentation can be found in interfaces.go

func (*ChaincodeStub) GetState 

func (stub *ChaincodeStub) GetState(key string) ([]byte, error)

GetState documentation can be found in interfaces.go

func (*ChaincodeStub) GetStateByPartialCompositeKey 

func (stub *ChaincodeStub) GetStateByPartialCompositeKey(objectType string, attributes []string) (StateQueryIteratorInterface, error)

GetStateByPartialCompositeKey function can be invoked by a chaincode to query the state based on a given partial composite key. This function returns an iterator which can be used to iterate over all composite keys whose prefix matches the given partial composite key. This function should be used only for a partial composite key. For a full composite key, an iter with empty response would be returned.

func (*ChaincodeStub) GetStateByPartialCompositeKeyWithPagination 

func (stub *ChaincodeStub) GetStateByPartialCompositeKeyWithPagination(objectType string, keys []string,
	pageSize int32, bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

func (*ChaincodeStub) GetStateByRange 

func (stub *ChaincodeStub) GetStateByRange(startKey, endKey string) (StateQueryIteratorInterface, error)

GetStateByRange documentation can be found in interfaces.go

func (*ChaincodeStub) GetStateByRangeWithPagination 

func (stub *ChaincodeStub) GetStateByRangeWithPagination(startKey, endKey string, pageSize int32,
	bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

func (*ChaincodeStub) GetStateValidationParameter 

func (stub *ChaincodeStub) GetStateValidationParameter(key string) ([]byte, error)

GetStateValidationParameter documentation can be found in interfaces.go

func (*ChaincodeStub) GetStringArgs 

func (stub *ChaincodeStub) GetStringArgs() []string

GetStringArgs documentation can be found in interfaces.go

func (*ChaincodeStub) GetTransient 

func (stub *ChaincodeStub) GetTransient() (map[string][]byte, error)

GetTransient documentation can be found in interfaces.go

func (*ChaincodeStub) GetTxID 

func (stub *ChaincodeStub) GetTxID() string

GetTxID returns the transaction ID for the proposal

func (*ChaincodeStub) GetTxTimestamp 

func (stub *ChaincodeStub) GetTxTimestamp() (*timestamp.Timestamp, error)

GetTxTimestamp documentation can be found in interfaces.go

func (*ChaincodeStub) InvokeChaincode 

func (stub *ChaincodeStub) InvokeChaincode(chaincodeName string, args [][]byte, channel string) pb.Response

InvokeChaincode documentation can be found in interfaces.go

func (*ChaincodeStub) PutPrivateData 

func (stub *ChaincodeStub) PutPrivateData(collection string, key string, value []byte) error

PutPrivateData documentation can be found in interfaces.go

func (*ChaincodeStub) PutState 

func (stub *ChaincodeStub) PutState(key string, value []byte) error

PutState documentation can be found in interfaces.go

func (*ChaincodeStub) SetEvent 

func (stub *ChaincodeStub) SetEvent(name string, payload []byte) error

SetEvent documentation can be found in interfaces.go

func (*ChaincodeStub) SetPrivateDataValidationParameter 

func (stub *ChaincodeStub) SetPrivateDataValidationParameter(collection, key string, ep []byte) error

SetPrivateDataValidationParameter documentation can be found in interfaces.go

func (*ChaincodeStub) SetStateValidationParameter 

func (stub *ChaincodeStub) SetStateValidationParameter(key string, ep []byte) error

SetStateValidationParameter documentation can be found in interfaces.go

func (*ChaincodeStub) SplitCompositeKey 

func (stub *ChaincodeStub) SplitCompositeKey(compositeKey string) (string, []string, error)

SplitCompositeKey documentation can be found in interfaces.go

type ChaincodeStubInterface 

type ChaincodeStubInterface interface {
	// GetArgs returns the arguments intended for the chaincode Init and Invoke
	// as an array of byte arrays.
	GetArgs() [][]byte

	// GetStringArgs returns the arguments intended for the chaincode Init and
	// Invoke as a string array. Only use GetStringArgs if the client passes
	// arguments intended to be used as strings.
	GetStringArgs() []string

	// GetFunctionAndParameters returns the first argument as the function
	// name and the rest of the arguments as parameters in a string array.
	// Only use GetFunctionAndParameters if the client passes arguments intended
	// to be used as strings.
	GetFunctionAndParameters() (string, []string)

	// GetArgsSlice returns the arguments intended for the chaincode Init and
	// Invoke as a byte array
	GetArgsSlice() ([]byte, error)

	// GetTxID returns the tx_id of the transaction proposal, which is unique per
	// transaction and per client. See ChannelHeader in protos/common/common.proto
	// for further details.
	GetTxID() string

	// GetChannelID returns the channel the proposal is sent to for chaincode to process.
	// This would be the channel_id of the transaction proposal (see ChannelHeader
	// in protos/common/common.proto) except where the chaincode is calling another on
	// a different channel
	GetChannelID() string

	// InvokeChaincode locally calls the specified chaincode `Invoke` using the
	// same transaction context; that is, chaincode calling chaincode doesn't
	// create a new transaction message.
	// If the called chaincode is on the same channel, it simply adds the called
	// chaincode read set and write set to the calling transaction.
	// If the called chaincode is on a different channel,
	// only the Response is returned to the calling chaincode; any PutState calls
	// from the called chaincode will not have any effect on the ledger; that is,
	// the called chaincode on a different channel will not have its read set
	// and write set applied to the transaction. Only the calling chaincode's
	// read set and write set will be applied to the transaction. Effectively
	// the called chaincode on a different channel is a `Query`, which does not
	// participate in state validation checks in subsequent commit phase.
	// If `channel` is empty, the caller's channel is assumed.
	InvokeChaincode(chaincodeName string, args [][]byte, channel string) pb.Response

	// GetState returns the value of the specified `key` from the
	// ledger. Note that GetState doesn't read data from the writeset, which
	// has not been committed to the ledger. In other words, GetState doesn't
	// consider data modified by PutState that has not been committed.
	// If the key does not exist in the state database, (nil, nil) is returned.
	GetState(key string) ([]byte, error)

	// PutState puts the specified `key` and `value` into the transaction's
	// writeset as a data-write proposal. PutState doesn't effect the ledger
	// until the transaction is validated and successfully committed.
	// Simple keys must not be an empty string and must not start with a
	// null character (0x00) in order to avoid range query collisions with
	// composite keys, which internally get prefixed with 0x00 as composite
	// key namespace. In addition, if using CouchDB, keys can only contain
	// valid UTF-8 strings and cannot begin with an underscore ("_").
	PutState(key string, value []byte) error

	// DelState records the specified `key` to be deleted in the writeset of
	// the transaction proposal. The `key` and its value will be deleted from
	// the ledger when the transaction is validated and successfully committed.
	DelState(key string) error

	// SetStateValidationParameter sets the key-level endorsement policy for `key`.
	SetStateValidationParameter(key string, ep []byte) error

	// GetStateValidationParameter retrieves the key-level endorsement policy
	// for `key`. Note that this will introduce a read dependency on `key` in
	// the transaction's readset.
	GetStateValidationParameter(key string) ([]byte, error)

	// GetStateByRange returns a range iterator over a set of keys in the
	// ledger. The iterator can be used to iterate over all keys
	// between the startKey (inclusive) and endKey (exclusive).
	// However, if the number of keys between startKey and endKey is greater than the
	// totalQueryLimit (defined in core.yaml), this iterator cannot be used
	// to fetch all keys (results will be capped by the totalQueryLimit).
	// The keys are returned by the iterator in lexical order. Note
	// that startKey and endKey can be empty string, which implies unbounded range
	// query on start or end.
	// Call Close() on the returned StateQueryIteratorInterface object when done.
	// The query is re-executed during validation phase to ensure result set
	// has not changed since transaction endorsement (phantom reads detected).
	GetStateByRange(startKey, endKey string) (StateQueryIteratorInterface, error)

	// GetStateByRangeWithPagination returns a range iterator over a set of keys in the
	// ledger. The iterator can be used to fetch keys between the startKey (inclusive)
	// and endKey (exclusive).
	// When an empty string is passed as a value to the bookmark argument, the returned
	// iterator can be used to fetch the first `pageSize` keys between the startKey
	// (inclusive) and endKey (exclusive).
	// When the bookmark is a non-emptry string, the iterator can be used to fetch
	// the first `pageSize` keys between the bookmark (inclusive) and endKey (exclusive).
	// Note that only the bookmark present in a prior page of query results (ResponseMetadata)
	// can be used as a value to the bookmark argument. Otherwise, an empty string must
	// be passed as bookmark.
	// The keys are returned by the iterator in lexical order. Note
	// that startKey and endKey can be empty string, which implies unbounded range
	// query on start or end.
	// Call Close() on the returned StateQueryIteratorInterface object when done.
	// This call is only supported in a read only transaction.
	GetStateByRangeWithPagination(startKey, endKey string, pageSize int32,
		bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

	// GetStateByPartialCompositeKey queries the state in the ledger based on
	// a given partial composite key. This function returns an iterator
	// which can be used to iterate over all composite keys whose prefix matches
	// the given partial composite key. However, if the number of matching composite
	// keys is greater than the totalQueryLimit (defined in core.yaml), this iterator
	// cannot be used to fetch all matching keys (results will be limited by the totalQueryLimit).
	// The `objectType` and attributes are expected to have only valid utf8 strings and
	// should not contain U+0000 (nil byte) and U+10FFFF (biggest and unallocated code point).
	// See related functions SplitCompositeKey and CreateCompositeKey.
	// Call Close() on the returned StateQueryIteratorInterface object when done.
	// The query is re-executed during validation phase to ensure result set
	// has not changed since transaction endorsement (phantom reads detected).
	GetStateByPartialCompositeKey(objectType string, keys []string) (StateQueryIteratorInterface, error)

	// GetStateByPartialCompositeKeyWithPagination queries the state in the ledger based on
	// a given partial composite key. This function returns an iterator
	// which can be used to iterate over the composite keys whose
	// prefix matches the given partial composite key.
	// When an empty string is passed as a value to the bookmark argument, the returned
	// iterator can be used to fetch the first `pageSize` composite keys whose prefix
	// matches the given partial composite key.
	// When the bookmark is a non-emptry string, the iterator can be used to fetch
	// the first `pageSize` keys between the bookmark (inclusive) and the last matching
	// composite key.
	// Note that only the bookmark present in a prior page of query result (ResponseMetadata)
	// can be used as a value to the bookmark argument. Otherwise, an empty string must
	// be passed as bookmark.
	// The `objectType` and attributes are expected to have only valid utf8 strings
	// and should not contain U+0000 (nil byte) and U+10FFFF (biggest and unallocated
	// code point). See related functions SplitCompositeKey and CreateCompositeKey.
	// Call Close() on the returned StateQueryIteratorInterface object when done.
	// This call is only supported in a read only transaction.
	GetStateByPartialCompositeKeyWithPagination(objectType string, keys []string,
		pageSize int32, bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

	// CreateCompositeKey combines the given `attributes` to form a composite
	// key. The objectType and attributes are expected to have only valid utf8
	// strings and should not contain U+0000 (nil byte) and U+10FFFF
	// (biggest and unallocated code point).
	// The resulting composite key can be used as the key in PutState().
	CreateCompositeKey(objectType string, attributes []string) (string, error)

	// SplitCompositeKey splits the specified key into attributes on which the
	// composite key was formed. Composite keys found during range queries
	// or partial composite key queries can therefore be split into their
	// composite parts.
	SplitCompositeKey(compositeKey string) (string, []string, error)

	// GetQueryResult performs a "rich" query against a state database. It is
	// only supported for state databases that support rich query,
	// e.g.CouchDB. The query string is in the native syntax
	// of the underlying state database. An iterator is returned
	// which can be used to iterate over all keys in the query result set.
	// However, if the number of keys in the query result set is greater than the
	// totalQueryLimit (defined in core.yaml), this iterator cannot be used
	// to fetch all keys in the query result set (results will be limited by
	// the totalQueryLimit).
	// The query is NOT re-executed during validation phase, phantom reads are
	// not detected. That is, other committed transactions may have added,
	// updated, or removed keys that impact the result set, and this would not
	// be detected at validation/commit time.  Applications susceptible to this
	// should therefore not use GetQueryResult as part of transactions that update
	// ledger, and should limit use to read-only chaincode operations.
	GetQueryResult(query string) (StateQueryIteratorInterface, error)

	// GetQueryResultWithPagination performs a "rich" query against a state database.
	// It is only supported for state databases that support rich query,
	// e.g., CouchDB. The query string is in the native syntax
	// of the underlying state database. An iterator is returned
	// which can be used to iterate over keys in the query result set.
	// When an empty string is passed as a value to the bookmark argument, the returned
	// iterator can be used to fetch the first `pageSize` of query results.
	// When the bookmark is a non-emptry string, the iterator can be used to fetch
	// the first `pageSize` keys between the bookmark and the last key in the query result.
	// Note that only the bookmark present in a prior page of query results (ResponseMetadata)
	// can be used as a value to the bookmark argument. Otherwise, an empty string
	// must be passed as bookmark.
	// This call is only supported in a read only transaction.
	GetQueryResultWithPagination(query string, pageSize int32,
		bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

	// GetHistoryForKey returns a history of key values across time.
	// For each historic key update, the historic value and associated
	// transaction id and timestamp are returned. The timestamp is the
	// timestamp provided by the client in the proposal header.
	// GetHistoryForKey requires peer configuration
	// core.ledger.history.enableHistoryDatabase to be true.
	// The query is NOT re-executed during validation phase, phantom reads are
	// not detected. That is, other committed transactions may have updated
	// the key concurrently, impacting the result set, and this would not be
	// detected at validation/commit time. Applications susceptible to this
	// should therefore not use GetHistoryForKey as part of transactions that
	// update ledger, and should limit use to read-only chaincode operations.
	GetHistoryForKey(key string) (HistoryQueryIteratorInterface, error)

	// GetPrivateData returns the value of the specified `key` from the specified
	// `collection`. Note that GetPrivateData doesn't read data from the
	// private writeset, which has not been committed to the `collection`. In
	// other words, GetPrivateData doesn't consider data modified by PutPrivateData
	// that has not been committed.
	GetPrivateData(collection, key string) ([]byte, error)

	// GetPrivateDataHash returns the hash of the value of the specified `key` from the specified
	// `collection`
	GetPrivateDataHash(collection, key string) ([]byte, error)

	// PutPrivateData puts the specified `key` and `value` into the transaction's
	// private writeset. Note that only hash of the private writeset goes into the
	// transaction proposal response (which is sent to the client who issued the
	// transaction) and the actual private writeset gets temporarily stored in a
	// transient store. PutPrivateData doesn't effect the `collection` until the
	// transaction is validated and successfully committed. Simple keys must not
	// be an empty string and must not start with a null character (0x00) in order
	// to avoid range query collisions with composite keys, which internally get
	// prefixed with 0x00 as composite key namespace. In addition, if using
	// CouchDB, keys can only contain valid UTF-8 strings and cannot begin with an
	// an underscore ("_").
	PutPrivateData(collection string, key string, value []byte) error

	// DelState records the specified `key` to be deleted in the private writeset of
	// the transaction. Note that only hash of the private writeset goes into the
	// transaction proposal response (which is sent to the client who issued the
	// transaction) and the actual private writeset gets temporarily stored in a
	// transient store. The `key` and its value will be deleted from the collection
	// when the transaction is validated and successfully committed.
	DelPrivateData(collection, key string) error

	// SetPrivateDataValidationParameter sets the key-level endorsement policy
	// for the private data specified by `key`.
	SetPrivateDataValidationParameter(collection, key string, ep []byte) error

	// GetPrivateDataValidationParameter retrieves the key-level endorsement
	// policy for the private data specified by `key`. Note that this introduces
	// a read dependency on `key` in the transaction's readset.
	GetPrivateDataValidationParameter(collection, key string) ([]byte, error)

	// GetPrivateDataByRange returns a range iterator over a set of keys in a
	// given private collection. The iterator can be used to iterate over all keys
	// between the startKey (inclusive) and endKey (exclusive).
	// The keys are returned by the iterator in lexical order. Note
	// that startKey and endKey can be empty string, which implies unbounded range
	// query on start or end.
	// Call Close() on the returned StateQueryIteratorInterface object when done.
	// The query is re-executed during validation phase to ensure result set
	// has not changed since transaction endorsement (phantom reads detected).
	GetPrivateDataByRange(collection, startKey, endKey string) (StateQueryIteratorInterface, error)

	// GetPrivateDataByPartialCompositeKey queries the state in a given private
	// collection based on a given partial composite key. This function returns
	// an iterator which can be used to iterate over all composite keys whose prefix
	// matches the given partial composite key. The `objectType` and attributes are
	// expected to have only valid utf8 strings and should not contain
	// U+0000 (nil byte) and U+10FFFF (biggest and unallocated code point).
	// See related functions SplitCompositeKey and CreateCompositeKey.
	// Call Close() on the returned StateQueryIteratorInterface object when done.
	// The query is re-executed during validation phase to ensure result set
	// has not changed since transaction endorsement (phantom reads detected).
	GetPrivateDataByPartialCompositeKey(collection, objectType string, keys []string) (StateQueryIteratorInterface, error)

	// GetPrivateDataQueryResult performs a "rich" query against a given private
	// collection. It is only supported for state databases that support rich query,
	// e.g.CouchDB. The query string is in the native syntax
	// of the underlying state database. An iterator is returned
	// which can be used to iterate (next) over the query result set.
	// The query is NOT re-executed during validation phase, phantom reads are
	// not detected. That is, other committed transactions may have added,
	// updated, or removed keys that impact the result set, and this would not
	// be detected at validation/commit time.  Applications susceptible to this
	// should therefore not use GetQueryResult as part of transactions that update
	// ledger, and should limit use to read-only chaincode operations.
	GetPrivateDataQueryResult(collection, query string) (StateQueryIteratorInterface, error)

	// GetCreator returns `SignatureHeader.Creator` (e.g. an identity)
	// of the `SignedProposal`. This is the identity of the agent (or user)
	// submitting the transaction.
	GetCreator() ([]byte, error)

	// GetTransient returns the `ChaincodeProposalPayload.Transient` field.
	// It is a map that contains data (e.g. cryptographic material)
	// that might be used to implement some form of application-level
	// confidentiality. The contents of this field, as prescribed by
	// `ChaincodeProposalPayload`, are supposed to always
	// be omitted from the transaction and excluded from the ledger.
	GetTransient() (map[string][]byte, error)

	// GetBinding returns the transaction binding, which is used to enforce a
	// link between application data (like those stored in the transient field
	// above) to the proposal itself. This is useful to avoid possible replay
	// attacks.
	GetBinding() ([]byte, error)

	// GetDecorations returns additional data (if applicable) about the proposal
	// that originated from the peer. This data is set by the decorators of the
	// peer, which append or mutate the chaincode input passed to the chaincode.
	GetDecorations() map[string][]byte

	// GetSignedProposal returns the SignedProposal object, which contains all
	// data elements part of a transaction proposal.
	GetSignedProposal() (*pb.SignedProposal, error)

	// GetTxTimestamp returns the timestamp when the transaction was created. This
	// is taken from the transaction ChannelHeader, therefore it will indicate the
	// client's timestamp and will have the same value across all endorsers.
	GetTxTimestamp() (*timestamp.Timestamp, error)

	// SetEvent allows the chaincode to set an event on the response to the
	// proposal to be included as part of a transaction. The event will be
	// available within the transaction in the committed block regardless of the
	// validity of the transaction.
	SetEvent(name string, payload []byte) error
}

ChaincodeStubInterface is used by deployable chaincode apps to access and modify their ledgers 在链码开发的过程中，主要涉及到ChaincodeStubInterface的以下方法，可以直接使用

type CommonIterator 

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

CommonIterator documentation can be found in interfaces.go

func (*CommonIterator) Close 

func (iter *CommonIterator) Close() error

Close documentation can be found in interfaces.go

func (*CommonIterator) HasNext 

func (iter *CommonIterator) HasNext() bool

HasNext documentation can be found in interfaces.go

type CommonIteratorInterface 

type CommonIteratorInterface interface {
	// HasNext returns true if the range query iterator contains additional keys
	// and values.
	HasNext() bool

	// Close closes the iterator. This should be called when done
	// reading from the iterator to free up resources.
	Close() error
}

CommonIteratorInterface allows a chaincode to check whether any more result to be fetched from an iterator and close it when done.

type Handler 

type Handler struct {
	//need lock to protect chaincode from attempting
	//concurrent requests to the peer
	sync.Mutex

	To         string
	ChatStream PeerChaincodeStream
	// contains filtered or unexported fields
}

Handler handler implementation for shim side of chaincode.

type HistoryQueryIterator 

type HistoryQueryIterator struct {
	*CommonIterator
}

HistoryQueryIterator documentation can be found in interfaces.go

func (*HistoryQueryIterator) Next 

func (iter *HistoryQueryIterator) Next() (*queryresult.KeyModification, error)

type HistoryQueryIteratorInterface 

type HistoryQueryIteratorInterface interface {
	// Inherit HasNext() and Close()
	CommonIteratorInterface

	// Next returns the next key and value in the history query iterator.
	Next() (*queryresult.KeyModification, error)
}

HistoryQueryIteratorInterface allows a chaincode to iterate over a set of key/value pairs returned by a history query.

type LoggingLevel 

type LoggingLevel logging.Level

LoggingLevel is an enumerated type of severity levels that control chaincode logging.

func LogLevel 

func LogLevel(levelString string) (LoggingLevel, error)

LogLevel converts a case-insensitive string chosen from CRITICAL, ERROR, WARNING, NOTICE, INFO or DEBUG into an element of the LoggingLevel type. In the event of errors the level returned is LogError.

type MockQueryIteratorInterface 

type MockQueryIteratorInterface interface {
	StateQueryIteratorInterface
}

MockQueryIteratorInterface allows a chaincode to iterate over a set of key/value pairs returned by range query. TODO: Once the execute query and history query are implemented in MockStub, we need to update this interface

type MockStateRangeQueryIterator 

type MockStateRangeQueryIterator struct {
	Closed   bool
	Stub     *MockStub
	StartKey string
	EndKey   string
	Current  *list.Element
}

func NewMockStateRangeQueryIterator 

func NewMockStateRangeQueryIterator(stub *MockStub, startKey string, endKey string) *MockStateRangeQueryIterator

func (*MockStateRangeQueryIterator) Close 

func (iter *MockStateRangeQueryIterator) Close() error

Close closes the range query iterator. This should be called when done reading from the iterator to free up resources.

func (*MockStateRangeQueryIterator) HasNext 

func (iter *MockStateRangeQueryIterator) HasNext() bool

HasNext returns true if the range query iterator contains additional keys and values.

func (*MockStateRangeQueryIterator) Next 

func (iter *MockStateRangeQueryIterator) Next() (*queryresult.KV, error)

Next returns the next key and value in the range query iterator.

func (*MockStateRangeQueryIterator) Print 

func (iter *MockStateRangeQueryIterator) Print()

type MockStub 

type MockStub struct {

	// A nice name that can be used for logging
	Name string

	// State keeps name value pairs
	State map[string][]byte

	// Keys stores the list of mapped values in lexical order
	Keys *list.List

	// registered list of other MockStub chaincodes that can be called from this MockStub
	Invokables map[string]*MockStub

	// stores a transaction uuid while being Invoked / Deployed
	// TODO if a chaincode uses recursion this may need to be a stack of TxIDs or possibly a reference counting map
	TxID string

	TxTimestamp *timestamp.Timestamp

	// stores a channel ID of the proposal
	ChannelID string

	PvtState map[string]map[string][]byte

	// stores per-key endorsement policy, first map index is the collection, second map index is the key
	EndorsementPolicies map[string]map[string][]byte

	// channel to store ChaincodeEvents
	ChaincodeEventsChannel chan *pb.ChaincodeEvent

	Decorations map[string][]byte
	// contains filtered or unexported fields
}

MockStub is an implementation of ChaincodeStubInterface for unit testing chaincode. Use this instead of ChaincodeStub in your chaincode's unit test calls to Init or Invoke.

func NewMockStub 

func NewMockStub(name string, cc Chaincode) *MockStub

Constructor to initialise the internal State map

func (*MockStub) CreateCompositeKey 

func (stub *MockStub) CreateCompositeKey(objectType string, attributes []string) (string, error)

CreateCompositeKey combines the list of attributes to form a composite key.

func (*MockStub) DelPrivateData 

func (stub *MockStub) DelPrivateData(collection string, key string) error

func (*MockStub) DelState 

func (stub *MockStub) DelState(key string) error

DelState removes the specified `key` and its value from the ledger.

func (*MockStub) GetArgs 

func (stub *MockStub) GetArgs() [][]byte

func (*MockStub) GetArgsSlice 

func (stub *MockStub) GetArgsSlice() ([]byte, error)

Not implemented

func (*MockStub) GetBinding 

func (stub *MockStub) GetBinding() ([]byte, error)

Not implemented

func (*MockStub) GetChannelID 

func (stub *MockStub) GetChannelID() string

func (*MockStub) GetCreator 

func (stub *MockStub) GetCreator() ([]byte, error)

Not implemented

func (*MockStub) GetDecorations 

func (stub *MockStub) GetDecorations() map[string][]byte

func (*MockStub) GetFunctionAndParameters 

func (stub *MockStub) GetFunctionAndParameters() (function string, params []string)

func (*MockStub) GetHistoryForKey 

func (stub *MockStub) GetHistoryForKey(key string) (HistoryQueryIteratorInterface, error)

GetHistoryForKey function can be invoked by a chaincode to return a history of key values across time. GetHistoryForKey is intended to be used for read-only queries.

func (*MockStub) GetPrivateData 

func (stub *MockStub) GetPrivateData(collection string, key string) ([]byte, error)

func (*MockStub) GetPrivateDataByPartialCompositeKey 

func (stub *MockStub) GetPrivateDataByPartialCompositeKey(collection, objectType string, attributes []string) (StateQueryIteratorInterface, error)

func (*MockStub) GetPrivateDataByRange 

func (stub *MockStub) GetPrivateDataByRange(collection, startKey, endKey string) (StateQueryIteratorInterface, error)

func (*MockStub) GetPrivateDataHash 

func (stub *MockStub) GetPrivateDataHash(collection, key string) ([]byte, error)

func (*MockStub) GetPrivateDataQueryResult 

func (stub *MockStub) GetPrivateDataQueryResult(collection, query string) (StateQueryIteratorInterface, error)

func (*MockStub) GetPrivateDataValidationParameter 

func (stub *MockStub) GetPrivateDataValidationParameter(collection, key string) ([]byte, error)

func (*MockStub) GetQueryResult 

func (stub *MockStub) GetQueryResult(query string) (StateQueryIteratorInterface, error)

GetQueryResult function can be invoked by a chaincode to perform a rich query against state database. Only supported by state database implementations that support rich query. The query string is in the syntax of the underlying state database. An iterator is returned which can be used to iterate (next) over the query result set

func (*MockStub) GetQueryResultWithPagination 

func (stub *MockStub) GetQueryResultWithPagination(query string, pageSize int32,
	bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

func (*MockStub) GetSignedProposal 

func (stub *MockStub) GetSignedProposal() (*pb.SignedProposal, error)

Not implemented

func (*MockStub) GetState 

func (stub *MockStub) GetState(key string) ([]byte, error)

GetState retrieves the value for a given key from the ledger

func (*MockStub) GetStateByPartialCompositeKey 

func (stub *MockStub) GetStateByPartialCompositeKey(objectType string, attributes []string) (StateQueryIteratorInterface, error)

GetStateByPartialCompositeKey function can be invoked by a chaincode to query the state based on a given partial composite key. This function returns an iterator which can be used to iterate over all composite keys whose prefix matches the given partial composite key. This function should be used only for a partial composite key. For a full composite key, an iter with empty response would be returned.

func (*MockStub) GetStateByPartialCompositeKeyWithPagination 

func (stub *MockStub) GetStateByPartialCompositeKeyWithPagination(objectType string, keys []string,
	pageSize int32, bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

func (*MockStub) GetStateByRange 

func (stub *MockStub) GetStateByRange(startKey, endKey string) (StateQueryIteratorInterface, error)

func (*MockStub) GetStateByRangeWithPagination 

func (stub *MockStub) GetStateByRangeWithPagination(startKey, endKey string, pageSize int32,
	bookmark string) (StateQueryIteratorInterface, *pb.QueryResponseMetadata, error)

func (*MockStub) GetStateValidationParameter 

func (stub *MockStub) GetStateValidationParameter(key string) ([]byte, error)

func (*MockStub) GetStringArgs 

func (stub *MockStub) GetStringArgs() []string

func (*MockStub) GetTransient 

func (stub *MockStub) GetTransient() (map[string][]byte, error)

Not implemented

func (*MockStub) GetTxID 

func (stub *MockStub) GetTxID() string

func (*MockStub) GetTxTimestamp 

func (stub *MockStub) GetTxTimestamp() (*timestamp.Timestamp, error)

func (*MockStub) InvokeChaincode 

func (stub *MockStub) InvokeChaincode(chaincodeName string, args [][]byte, channel string) pb.Response

InvokeChaincode calls a peered chaincode. E.g. stub1.InvokeChaincode("stub2Hash", funcArgs, channel) Before calling this make sure to create another MockStub stub2, call stub2.MockInit(uuid, func, args) and register it with stub1 by calling stub1.MockPeerChaincode("stub2Hash", stub2)

func (*MockStub) MockInit 

func (stub *MockStub) MockInit(uuid string, args [][]byte) pb.Response

Initialise this chaincode, also starts and ends a transaction.

func (*MockStub) MockInvoke 

func (stub *MockStub) MockInvoke(uuid string, args [][]byte) pb.Response

Invoke this chaincode, also starts and ends a transaction.

func (*MockStub) MockInvokeWithSignedProposal 

func (stub *MockStub) MockInvokeWithSignedProposal(uuid string, args [][]byte, sp *pb.SignedProposal) pb.Response

Invoke this chaincode, also starts and ends a transaction.

func (*MockStub) MockPeerChaincode 

func (stub *MockStub) MockPeerChaincode(invokableChaincodeName string, otherStub *MockStub)

Register a peer chaincode with this MockStub invokableChaincodeName is the name or hash of the peer otherStub is a MockStub of the peer, already intialised

func (*MockStub) MockTransactionEnd 

func (stub *MockStub) MockTransactionEnd(uuid string)

End a mocked transaction, clearing the UUID.

func (*MockStub) MockTransactionStart 

func (stub *MockStub) MockTransactionStart(txid string)

Used to indicate to a chaincode that it is part of a transaction. This is important when chaincodes invoke each other. MockStub doesn't support concurrent transactions at present.

func (*MockStub) PutPrivateData 

func (stub *MockStub) PutPrivateData(collection string, key string, value []byte) error

func (*MockStub) PutState 

func (stub *MockStub) PutState(key string, value []byte) error

PutState writes the specified `value` and `key` into the ledger.

func (*MockStub) SetEvent 

func (stub *MockStub) SetEvent(name string, payload []byte) error

func (*MockStub) SetPrivateDataValidationParameter 

func (stub *MockStub) SetPrivateDataValidationParameter(collection, key string, ep []byte) error

func (*MockStub) SetStateValidationParameter 

func (stub *MockStub) SetStateValidationParameter(key string, ep []byte) error

func (*MockStub) SplitCompositeKey 

func (stub *MockStub) SplitCompositeKey(compositeKey string) (string, []string, error)

SplitCompositeKey splits the composite key into attributes on which the composite key was formed.

type PeerChaincodeStream 

type PeerChaincodeStream interface {
	Send(*pb.ChaincodeMessage) error
	Recv() (*pb.ChaincodeMessage, error)
	CloseSend() error
}

PeerChaincodeStream interface for stream between Peer and chaincode instance.

type SendPanicFailure 

type SendPanicFailure string

SendPanicFailure

func (SendPanicFailure) Error 

func (e SendPanicFailure) Error() string

type StateQueryIterator 

type StateQueryIterator struct {
	*CommonIterator
}

StateQueryIterator documentation can be found in interfaces.go

func (*StateQueryIterator) Next 

func (iter *StateQueryIterator) Next() (*queryresult.KV, error)

type StateQueryIteratorInterface 

type StateQueryIteratorInterface interface {
	// Inherit HasNext() and Close()
	CommonIteratorInterface

	// Next returns the next key and value in the range and execute query iterator.
	Next() (*queryresult.KV, error)
}

StateQueryIteratorInterface allows a chaincode to iterate over a set of key/value pairs returned by range and execute query.

Source Files

View all Source files

Directories

Path Synopsis
ext
attrmgr
cid
entities
statebased

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