add: subscribe on oracle events functionality

config/config.go

@@ -14,6 +14,7 @@ type Config struct {
 	Rendezvous             string `toml:"rendezvous"`
 	ProtocolID             string `toml:"protocol_id"`
 	SessionKey             string `toml:"session_key"`
+	PrivateKey             string `toml:"private_key"`
 }
 
 // viperEnvVariable loads config parameters from .env file
@@ -58,6 +59,7 @@ func NewConfig() *Config {
 	Rendezvous := viperEnvString("RENDEZVOUS", "filecoin-p2p-oracle")
 	ProtocolID := viperEnvString("PROTOCOL_ID", "p2p-oracle")
 	SessionKey := viperEnvString("SESSION_KEY", "go")
+	PrivateKey := viperEnvString("PRIVATE_KEY", "")
 
 	return &Config{
 		ListenPort:             ListenPort,
@@ -67,5 +69,6 @@ func NewConfig() *Config {
 		Rendezvous:             Rendezvous,
 		ProtocolID:             ProtocolID,
 		SessionKey:             SessionKey,
+		PrivateKey:             PrivateKey,
 	}
 }

handler/handler.go

@@ -36,6 +36,8 @@ func NewHandler(pb *pubsub.PubSub, oracleTopic string, peerID peer.ID, networkTo
 		identityMap:   make(map[peer.ID]string),
 		Logger:        log.Logger("rendezvous"),
 	}
+	log.SetAllLoggers(log.LevelInfo)
+
 	return handler
 }
 

node/node.go

@@ -34,6 +34,7 @@ func NewNode() *Node {
 		Logger:        log.Logger("rendezvous"),
 		networkTopics: mapset.NewSet(),
 	}
+	log.SetAllLoggers(log.LevelInfo)
 
 	return node
 }

rpcclient/ethereum.go

@@ -5,9 +5,12 @@ import (
 	"crypto/ecdsa"
 	"io/ioutil"
 	"math/big"
+	"strings"
 
 	"github.com/Secured-Finance/p2p-oracle-node/contracts/aggregator"
+	"github.com/Secured-Finance/p2p-oracle-node/contracts/oracleemitter"
 	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/common"
@@ -24,6 +27,13 @@ type EthereumClient struct {
 	Logger     *log.ZapEventLogger
 }
 
+type OracleEvent struct {
+	RequestType      string
+	CallbackAddress  common.Address
+	CallbackMethodID [4]byte
+	RequestID        *big.Int
+}
+
 type Ethereum interface {
 	Connect(context.Context, string) error
 	Balance(context.Context, string) (*big.Int, error)
@@ -38,6 +48,7 @@ func NewEthereumClient() *EthereumClient {
 	ethereumClient := &EthereumClient{
 		Logger: log.Logger("rendezvous"),
 	}
+	log.SetAllLoggers(log.LevelInfo)
 
 	return ethereumClient
 }
@@ -136,12 +147,18 @@ func (c *EthereumClient) GenerateAddressFromPrivateKey(private_key string) strin
 	return address
 }
 
-func (c *EthereumClient) SubscribeOnSmartContractEvents(ctx context.Context, address string) {
+func (c *EthereumClient) SubscribeOnOracleEvents(ctx context.Context, address string) {
 	contractAddress := common.HexToAddress(address)
+
 	query := ethereum.FilterQuery{
 		Addresses: []common.Address{contractAddress},
 	}
 
+	contractAbi, err := abi.JSON(strings.NewReader(string(oracleemitter.SmartcontractsABI)))
+	if err != nil {
+		c.Logger.Fatal(err)
+	}
+
 	logs := make(chan types.Log)
 	sub, err := c.WsClient.SubscribeFilterLogs(context.Background(), query, logs)
 	if err != nil {
@@ -153,10 +170,15 @@ func (c *EthereumClient) SubscribeOnSmartContractEvents(ctx context.Context, add
 		case err := <-sub.Err():
 			c.Logger.Fatal(err)
 		case vLog := <-logs:
-			c.Logger.Info(vLog) // pointer to event log
+			var event OracleEvent
-		}
+			err := contractAbi.Unpack(&event, "NewOracleRequest", vLog.Data)
-	}
 
+			if err != nil {
+				c.Logger.Fatal(err)
+			}
+			c.Logger.Info(event) // pointer to event log
+		}
+	}
 }
 
 func (c *EthereumClient) createKeyStore(password string) string {