github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/session/pingpong/exchange_messaging.go (about)

     1  /*
     2   * Copyright (C) 2019 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package pingpong
    19  
    20  import (
    21  	"context"
    22  	"time"
    23  
    24  	"github.com/mysteriumnetwork/node/p2p"
    25  	"github.com/mysteriumnetwork/node/pb"
    26  	"github.com/mysteriumnetwork/payments/crypto"
    27  	"github.com/rs/zerolog/log"
    28  )
    29  
    30  const bigIntBase int = 10
    31  
    32  // ExchangeRequest structure represents message from service consumer to send a an exchange message.
    33  type ExchangeRequest struct {
    34  	Message crypto.ExchangeMessage `json:"exchangeMessage"`
    35  }
    36  
    37  // ExchangeSender is responsible for sending the exchange messages.
    38  type ExchangeSender struct {
    39  	ch p2p.ChannelSender
    40  }
    41  
    42  // NewExchangeSender returns a new instance of exchange message sender.
    43  func NewExchangeSender(ch p2p.ChannelSender) *ExchangeSender {
    44  	return &ExchangeSender{
    45  		ch: ch,
    46  	}
    47  }
    48  
    49  // Send sends the given exchange message.
    50  func (es *ExchangeSender) Send(em crypto.ExchangeMessage) error {
    51  	pMessage := &pb.ExchangeMessage{
    52  		Promise: &pb.Promise{
    53  			ChannelID: em.Promise.ChannelID,
    54  			Amount:    em.Promise.Amount.Text(bigIntBase),
    55  			Fee:       em.Promise.Fee.Text(bigIntBase),
    56  			Hashlock:  em.Promise.Hashlock,
    57  			R:         em.Promise.R,
    58  			Signature: em.Promise.Signature,
    59  			ChainID:   em.Promise.ChainID,
    60  		},
    61  		AgreementID:    em.AgreementID.Text(bigIntBase),
    62  		AgreementTotal: em.AgreementTotal.Text(bigIntBase),
    63  		Provider:       em.Provider,
    64  		Signature:      em.Signature,
    65  		HermesID:       em.HermesID,
    66  		ChainID:        em.ChainID,
    67  	}
    68  	log.Debug().Msgf("Sending P2P message to %q: %s", p2p.TopicPaymentMessage, pMessage.String())
    69  
    70  	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
    71  	defer cancel()
    72  	_, err := es.ch.Send(ctx, p2p.TopicPaymentMessage, p2p.ProtoMessage(pMessage))
    73  	return err
    74  }