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69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
package lnd
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import (
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"io/ioutil"
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"net/url"
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"github.com/pkg/errors"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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macaroon "gopkg.in/macaroon.v2"
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"github.com/lightningnetwork/lnd/lncfg"
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"github.com/lightningnetwork/lnd/macaroons"
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"github.com/edouardparis/lntop/config"
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)
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func newClientConn(c *config.Network) (*grpc.ClientConn, error) {
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macaroonBytes, err := ioutil.ReadFile(c.Macaroon)
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if err != nil {
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return nil, err
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}
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mac := &macaroon.Macaroon{}
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err = mac.UnmarshalBinary(macaroonBytes)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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macConstraints := []macaroons.Constraint{
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macaroons.TimeoutConstraint(c.MacaroonTimeOut),
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macaroons.IPLockConstraint(c.MacaroonIP),
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}
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constrainedMac, err := macaroons.AddConstraints(mac, macConstraints...)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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cred, err := credentials.NewClientTLSFromFile(c.Cert, "")
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if err != nil {
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return nil, err
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}
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u, err := url.Parse(c.Address)
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if err != nil {
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return nil, err
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}
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macaroon, err := macaroons.NewMacaroonCredential(constrainedMac)
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if err != nil {
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return nil, err
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}
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opts := []grpc.DialOption{
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grpc.WithTransportCredentials(cred),
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grpc.WithPerRPCCredentials(macaroon),
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grpc.WithContextDialer(lncfg.ClientAddressDialer(u.Port())),
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grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(c.MaxMsgRecvSize)),
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}
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conn, err := grpc.Dial(u.Hostname(), opts...)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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return conn, nil
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}
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