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commonutils.go
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commonutils.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package utils
import (
"fmt"
"time"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/ptypes/timestamp"
"github.com/hyperledger/fabric/common/crypto"
"github.com/hyperledger/fabric/protos/common"
cb "github.com/hyperledger/fabric/protos/common"
pb "github.com/hyperledger/fabric/protos/peer"
"github.com/pkg/errors"
)
// MarshalOrPanic serializes a protobuf message and panics if this
// operation fails
func MarshalOrPanic(pb proto.Message) []byte {
data, err := proto.Marshal(pb)
if err != nil {
panic(err)
}
return data
}
// Marshal serializes a protobuf message.
func Marshal(pb proto.Message) ([]byte, error) {
return proto.Marshal(pb)
}
// CreateNonceOrPanic generates a nonce using the common/crypto package
// and panics if this operation fails.
func CreateNonceOrPanic() []byte {
nonce, err := CreateNonce()
if err != nil {
panic(err)
}
return nonce
}
// CreateNonce generates a nonce using the common/crypto package.
func CreateNonce() ([]byte, error) {
nonce, err := crypto.GetRandomNonce()
return nonce, errors.WithMessage(err, "error generating random nonce")
}
// UnmarshalPayloadOrPanic unmarshals bytes to a Payload structure or panics
// on error
func UnmarshalPayloadOrPanic(encoded []byte) *cb.Payload {
payload, err := UnmarshalPayload(encoded)
if err != nil {
panic(err)
}
return payload
}
// UnmarshalPayload unmarshals bytes to a Payload structure
func UnmarshalPayload(encoded []byte) (*cb.Payload, error) {
payload := &cb.Payload{}
err := proto.Unmarshal(encoded, payload)
return payload, errors.Wrap(err, "error unmarshaling Payload")
}
// UnmarshalEnvelopeOrPanic unmarshals bytes to an Envelope structure or panics
// on error
func UnmarshalEnvelopeOrPanic(encoded []byte) *cb.Envelope {
envelope, err := UnmarshalEnvelope(encoded)
if err != nil {
panic(err)
}
return envelope
}
// UnmarshalEnvelope unmarshals bytes to an Envelope structure
func UnmarshalEnvelope(encoded []byte) (*cb.Envelope, error) {
envelope := &cb.Envelope{}
err := proto.Unmarshal(encoded, envelope)
return envelope, errors.Wrap(err, "error unmarshaling Envelope")
}
// UnmarshalBlockOrPanic unmarshals bytes to an Block structure or panics
// on error
func UnmarshalBlockOrPanic(encoded []byte) *cb.Block {
block, err := UnmarshalBlock(encoded)
if err != nil {
panic(err)
}
return block
}
// UnmarshalBlock unmarshals bytes to an Block structure
func UnmarshalBlock(encoded []byte) (*cb.Block, error) {
block := &cb.Block{}
err := proto.Unmarshal(encoded, block)
return block, errors.Wrap(err, "error unmarshaling Block")
}
// UnmarshalEnvelopeOfType unmarshals an envelope of the specified type,
// including unmarshaling the payload data
func UnmarshalEnvelopeOfType(envelope *cb.Envelope, headerType cb.HeaderType, message proto.Message) (*cb.ChannelHeader, error) {
payload, err := UnmarshalPayload(envelope.Payload)
if err != nil {
return nil, err
}
if payload.Header == nil {
return nil, errors.New("envelope must have a Header")
}
chdr, err := UnmarshalChannelHeader(payload.Header.ChannelHeader)
if err != nil {
return nil, err
}
if chdr.Type != int32(headerType) {
return nil, errors.Errorf("invalid type %s, expected %s", cb.HeaderType(chdr.Type), headerType)
}
err = proto.Unmarshal(payload.Data, message)
err = errors.Wrapf(err, "error unmarshaling message for type %s", headerType)
return chdr, err
}
// ExtractEnvelopeOrPanic retrieves the requested envelope from a given block
// and unmarshals it -- it panics if either of these operations fail
func ExtractEnvelopeOrPanic(block *cb.Block, index int) *cb.Envelope {
envelope, err := ExtractEnvelope(block, index)
if err != nil {
panic(err)
}
return envelope
}
// ExtractEnvelope retrieves the requested envelope from a given block and
// unmarshals it
func ExtractEnvelope(block *cb.Block, index int) (*cb.Envelope, error) {
if block.Data == nil {
return nil, errors.New("block data is nil")
}
envelopeCount := len(block.Data.Data)
if index < 0 || index >= envelopeCount {
return nil, errors.New("envelope index out of bounds")
}
marshaledEnvelope := block.Data.Data[index]
envelope, err := GetEnvelopeFromBlock(marshaledEnvelope)
err = errors.WithMessage(err, fmt.Sprintf("block data does not carry an envelope at index %d", index))
return envelope, err
}
// ExtractPayloadOrPanic retrieves the payload of a given envelope and
// unmarshals it -- it panics if either of these operations fail
func ExtractPayloadOrPanic(envelope *cb.Envelope) *cb.Payload {
payload, err := ExtractPayload(envelope)
if err != nil {
panic(err)
}
return payload
}
// ExtractPayload retrieves the payload of a given envelope and unmarshals it.
func ExtractPayload(envelope *cb.Envelope) (*cb.Payload, error) {
payload := &cb.Payload{}
err := proto.Unmarshal(envelope.Payload, payload)
err = errors.Wrap(err, "no payload in envelope")
return payload, err
}
// MakeChannelHeader creates a ChannelHeader.
func MakeChannelHeader(headerType cb.HeaderType, version int32, chainID string, epoch uint64) *cb.ChannelHeader {
return &cb.ChannelHeader{
Type: int32(headerType),
Version: version,
Timestamp: ×tamp.Timestamp{
Seconds: time.Now().Unix(),
Nanos: 0,
},
ChannelId: chainID,
Epoch: epoch,
}
}
// MakeSignatureHeader creates a SignatureHeader.
func MakeSignatureHeader(serializedCreatorCertChain []byte, nonce []byte) *cb.SignatureHeader {
return &cb.SignatureHeader{
Creator: serializedCreatorCertChain,
Nonce: nonce,
}
}
// SetTxID generates a transaction id based on the provided signature header
// and sets the TxId field in the channel header
func SetTxID(channelHeader *cb.ChannelHeader, signatureHeader *cb.SignatureHeader) error {
txid, err := ComputeTxID(
signatureHeader.Nonce,
signatureHeader.Creator,
)
if err != nil {
return err
}
channelHeader.TxId = txid
return nil
}
// MakePayloadHeader creates a Payload Header.
func MakePayloadHeader(ch *cb.ChannelHeader, sh *cb.SignatureHeader) *cb.Header {
return &cb.Header{
ChannelHeader: MarshalOrPanic(ch),
SignatureHeader: MarshalOrPanic(sh),
}
}
// NewSignatureHeaderOrPanic returns a signature header and panics on error.
func NewSignatureHeaderOrPanic(signer crypto.LocalSigner) *cb.SignatureHeader {
if signer == nil {
panic(errors.New("invalid signer. cannot be nil"))
}
signatureHeader, err := signer.NewSignatureHeader()
if err != nil {
panic(fmt.Errorf("failed generating a new SignatureHeader: %s", err))
}
return signatureHeader
}
// SignOrPanic signs a message and panics on error.
func SignOrPanic(signer crypto.LocalSigner, msg []byte) []byte {
if signer == nil {
panic(errors.New("invalid signer. cannot be nil"))
}
sigma, err := signer.Sign(msg)
if err != nil {
panic(fmt.Errorf("failed generating signature: %s", err))
}
return sigma
}
// UnmarshalChannelHeader returns a ChannelHeader from bytes
func UnmarshalChannelHeader(bytes []byte) (*cb.ChannelHeader, error) {
chdr := &cb.ChannelHeader{}
err := proto.Unmarshal(bytes, chdr)
return chdr, errors.Wrap(err, "error unmarshaling ChannelHeader")
}
// UnmarshalChannelHeaderOrPanic unmarshals bytes to a ChannelHeader or panics
// on error
func UnmarshalChannelHeaderOrPanic(bytes []byte) *cb.ChannelHeader {
chdr, err := UnmarshalChannelHeader(bytes)
if err != nil {
panic(err)
}
return chdr
}
// UnmarshalChaincodeID returns a ChaincodeID from bytes
func UnmarshalChaincodeID(bytes []byte) (*pb.ChaincodeID, error) {
ccid := &pb.ChaincodeID{}
err := proto.Unmarshal(bytes, ccid)
if err != nil {
return nil, errors.Wrap(err, "error unmarshaling ChaincodeID")
}
return ccid, nil
}
// UnmarshalSignatureHeader unmarshals bytes to a SignatureHeader.
func UnmarshalSignatureHeader(bytes []byte) (*cb.SignatureHeader, error) {
sh := &common.SignatureHeader{}
if err := proto.Unmarshal(bytes, sh); err != nil {
return nil, errors.Wrap(err, "error unmarshaling SignatureHeader")
}
return sh, nil
}
// UnmarshalSignatureHeaderOrPanic unmarshals bytes to a SignatureHeader.
func UnmarshalSignatureHeaderOrPanic(bytes []byte) *cb.SignatureHeader {
sighdr, err := UnmarshalSignatureHeader(bytes)
if err != nil {
panic(err)
}
return sighdr
}
// IsConfigBlock validates whenever given block contains configuration
// update transaction
func IsConfigBlock(block *cb.Block) bool {
envelope, err := ExtractEnvelope(block, 0)
if err != nil {
return false
}
payload, err := GetPayload(envelope)
if err != nil {
return false
}
if payload.Header == nil {
return false
}
hdr, err := UnmarshalChannelHeader(payload.Header.ChannelHeader)
if err != nil {
return false
}
return cb.HeaderType(hdr.Type) == cb.HeaderType_CONFIG || cb.HeaderType(hdr.Type) == cb.HeaderType_ORDERER_TRANSACTION
}
// ChannelHeader returns the *cb.ChannelHeader for a given *cb.Envelope.
func ChannelHeader(env *cb.Envelope) (*cb.ChannelHeader, error) {
envPayload, err := UnmarshalPayload(env.Payload)
if err != nil {
return nil, err
}
if envPayload.Header == nil {
return nil, errors.New("header not set")
}
if envPayload.Header.ChannelHeader == nil {
return nil, errors.New("channel header not set")
}
chdr, err := UnmarshalChannelHeader(envPayload.Header.ChannelHeader)
if err != nil {
return nil, errors.WithMessage(err, "error unmarshaling channel header")
}
return chdr, nil
}
// ChannelID returns the Channel ID for a given *cb.Envelope.
func ChannelID(env *cb.Envelope) (string, error) {
chdr, err := ChannelHeader(env)
if err != nil {
return "", errors.WithMessage(err, "error retrieving channel header")
}
return chdr.ChannelId, nil
}
// EnvelopeToConfigUpdate is used to extract a ConfigUpdateEnvelope from an envelope of
// type CONFIG_UPDATE
func EnvelopeToConfigUpdate(configtx *cb.Envelope) (*cb.ConfigUpdateEnvelope, error) {
configUpdateEnv := &cb.ConfigUpdateEnvelope{}
_, err := UnmarshalEnvelopeOfType(configtx, cb.HeaderType_CONFIG_UPDATE, configUpdateEnv)
if err != nil {
return nil, err
}
return configUpdateEnv, nil
}