forked from hyperledger/fabric-sdk-go
/
peer.go
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/
peer.go
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/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package peer
import (
reqContext "context"
"crypto/x509"
"github.com/spf13/cast"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
"github.com/hyperledger/fabric-sdk-go/pkg/client/common/verifier"
"github.com/hyperledger/fabric-sdk-go/pkg/common/logging"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab"
)
var logger = logging.NewLogger("fabsdk/fab")
// Peer represents a node in the target blockchain network to which
// HFC sends endorsement proposals, transaction ordering or query requests.
type Peer struct {
config fab.EndpointConfig
certificate *x509.Certificate
serverName string
processor fab.ProposalProcessor
mspID string
url string
kap keepalive.ClientParameters
failFast bool
inSecure bool
commManager fab.CommManager
}
// Option describes a functional parameter for the New constructor
type Option func(*Peer) error
// New Returns a new Peer instance
func New(config fab.EndpointConfig, opts ...Option) (*Peer, error) {
peer := &Peer{
config: config,
commManager: &defCommManager{},
}
for _, opt := range opts {
err := opt(peer)
if err != nil {
return nil, err
}
}
if peer.processor == nil {
// TODO: config is declaring TLS but cert & serverHostOverride is being passed-in...
endorseRequest := peerEndorserRequest{
target: peer.url,
certificate: peer.certificate,
serverHostOverride: peer.serverName,
config: peer.config,
kap: peer.kap,
failFast: peer.failFast,
allowInsecure: peer.inSecure,
commManager: peer.commManager,
}
processor, err := newPeerEndorser(&endorseRequest)
if err != nil {
return nil, err
}
peer.processor = processor
}
return peer, nil
}
// WithURL is a functional option for the peer.New constructor that configures the peer's URL
func WithURL(url string) Option {
return func(p *Peer) error {
p.url = url
return nil
}
}
// WithTLSCert is a functional option for the peer.New constructor that configures the peer's TLS certificate
func WithTLSCert(certificate *x509.Certificate) Option {
return func(p *Peer) error {
p.certificate = certificate
return nil
}
}
// WithServerName is a functional option for the peer.New constructor that configures the peer's server name
func WithServerName(serverName string) Option {
return func(p *Peer) error {
p.serverName = serverName
return nil
}
}
// WithInsecure is a functional option for the peer.New constructor that configures the peer's grpc insecure option
func WithInsecure() Option {
return func(p *Peer) error {
p.inSecure = true
return nil
}
}
// WithMSPID is a functional option for the peer.New constructor that configures the peer's msp ID
func WithMSPID(mspID string) Option {
return func(p *Peer) error {
p.mspID = mspID
return nil
}
}
// FromPeerConfig is a functional option for the peer.New constructor that configures a new peer
// from a apiconfig.NetworkPeer struct
func FromPeerConfig(peerCfg *fab.NetworkPeer) Option {
return func(p *Peer) error {
p.url = peerCfg.URL
p.serverName = getServerNameOverride(peerCfg)
p.inSecure = isInsecureConnectionAllowed(peerCfg)
var err error
p.certificate = peerCfg.TLSCACert
if peerCfg.GRPCOptions["allow-insecure"] == false {
//verify if certificate was expired or not yet valid
err = verifier.ValidateCertificateDates(p.certificate)
if err != nil {
logger.Warn(err)
}
}
// TODO: Remove upon making peer interface immutable
p.mspID = peerCfg.MSPID
p.kap = getKeepAliveOptions(peerCfg)
p.failFast = getFailFast(peerCfg)
return nil
}
}
func getServerNameOverride(peerCfg *fab.NetworkPeer) string {
serverHostOverride := ""
if str, ok := peerCfg.GRPCOptions["ssl-target-name-override"].(string); ok {
serverHostOverride = str
}
return serverHostOverride
}
func getFailFast(peerCfg *fab.NetworkPeer) bool {
var failFast = true
if ff, ok := peerCfg.GRPCOptions["fail-fast"].(bool); ok {
failFast = cast.ToBool(ff)
}
return failFast
}
func getKeepAliveOptions(peerCfg *fab.NetworkPeer) keepalive.ClientParameters {
var kap keepalive.ClientParameters
if kaTime, ok := peerCfg.GRPCOptions["keep-alive-time"]; ok {
kap.Time = cast.ToDuration(kaTime)
}
if kaTimeout, ok := peerCfg.GRPCOptions["keep-alive-timeout"]; ok {
kap.Timeout = cast.ToDuration(kaTimeout)
}
if kaPermit, ok := peerCfg.GRPCOptions["keep-alive-permit"]; ok {
kap.PermitWithoutStream = cast.ToBool(kaPermit)
}
return kap
}
func isInsecureConnectionAllowed(peerCfg *fab.NetworkPeer) bool {
allowInsecure, ok := peerCfg.GRPCOptions["allow-insecure"].(bool)
if ok {
return allowInsecure
}
return false
}
// WithPeerProcessor is a functional option for the peer.New constructor that configures the peer's proposal processor
func WithPeerProcessor(processor fab.ProposalProcessor) Option {
return func(p *Peer) error {
p.processor = processor
return nil
}
}
// MSPID gets the Peer mspID.
func (p *Peer) MSPID() string {
return p.mspID
}
// URL gets the Peer URL. Required property for the instance objects.
// It returns the address of the Peer.
func (p *Peer) URL() string {
return p.url
}
// ProcessTransactionProposal sends the created proposal to peer for endorsement.
func (p *Peer) ProcessTransactionProposal(ctx reqContext.Context, proposal fab.ProcessProposalRequest) (*fab.TransactionProposalResponse, error) {
return p.processor.ProcessTransactionProposal(ctx, proposal)
}
func (p *Peer) String() string {
return p.url
}
// PeersToTxnProcessors converts a slice of Peers to a slice of TxnProposalProcessors
func PeersToTxnProcessors(peers []fab.Peer) []fab.ProposalProcessor {
tpp := make([]fab.ProposalProcessor, len(peers))
for i := range peers {
tpp[i] = peers[i]
}
return tpp
}
type defCommManager struct{}
func (*defCommManager) DialContext(ctx reqContext.Context, target string, opts ...grpc.DialOption) (conn *grpc.ClientConn, err error) {
logger.Debugf("DialContext [%s]", target)
opts = append(opts, grpc.WithBlock())
return grpc.DialContext(ctx, target, opts...)
}
func (*defCommManager) ReleaseConn(conn *grpc.ClientConn) {
logger.Debugf("ReleaseConn [%p]", conn)
if err := conn.Close(); err != nil {
logger.Debugf("unable to close connection [%s]", err)
}
}