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hlf_utils.go
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/
hlf_utils.go
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package main
import (
"crypto/x509"
"fmt"
"io/ioutil"
"path"
"github.com/hyperledger/fabric-gateway/pkg/identity"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
func newGrpcConnection(tlsCertPath string, gatewayPeer string, peerEndpoint string) *grpc.ClientConn {
certificate, err := loadCertificate(tlsCertPath)
if err != nil {
panic(err)
}
certPool := x509.NewCertPool()
certPool.AddCert(certificate)
transportCredentials := credentials.NewClientTLSFromCert(certPool, gatewayPeer)
connection, err := grpc.Dial(peerEndpoint, grpc.WithTransportCredentials(transportCredentials))
if err != nil {
panic(fmt.Errorf("failed to create gRPC connection: %w", err))
}
return connection
}
func loadCertificate(filename string) (*x509.Certificate, error) {
certificatePEM, err := ioutil.ReadFile(filename)
if err != nil {
return nil, fmt.Errorf("failed to read certificate file: %w", err)
}
return identity.CertificateFromPEM(certificatePEM)
}
// newIdentity creates a client identity for this Gateway connection using an X.509 certificate.
func newIdentity(certPath string, mspID string) *identity.X509Identity {
certificate, err := loadCertificate(certPath)
if err != nil {
panic(err)
}
id, err := identity.NewX509Identity(mspID, certificate)
if err != nil {
panic(err)
}
return id
}
func newSign(keyPath string) identity.Sign {
files, err := ioutil.ReadDir(keyPath)
if err != nil {
panic(fmt.Errorf("failed to read private key directory: %w", err))
}
privateKeyPEM, err := ioutil.ReadFile(path.Join(keyPath, files[0].Name()))
if err != nil {
panic(fmt.Errorf("failed to read private key file: %w", err))
}
privateKey, err := identity.PrivateKeyFromPEM(privateKeyPEM)
if err != nil {
panic(err)
}
sign, err := identity.NewPrivateKeySign(privateKey)
if err != nil {
panic(err)
}
return sign
}