717be43a5d
1. Generic parallel sending part can be reused by state service. 2. Specific oracle marshaling is implemented on top of (1).
64 lines
1.9 KiB
Go
64 lines
1.9 KiB
Go
package broadcaster
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"encoding/binary"
|
|
"time"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/config"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
|
|
"github.com/nspcc-dev/neo-go/pkg/rpc/client"
|
|
"github.com/nspcc-dev/neo-go/pkg/rpc/request"
|
|
"github.com/nspcc-dev/neo-go/pkg/services/helpers/rpcbroadcaster"
|
|
"github.com/nspcc-dev/neo-go/pkg/services/oracle"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
const (
|
|
defaultSendTimeout = time.Second * 4
|
|
|
|
defaultChanCapacity = 16
|
|
)
|
|
|
|
type oracleBroadcaster struct {
|
|
rpcbroadcaster.RPCBroadcaster
|
|
}
|
|
|
|
// New returns new struct capable of broadcasting oracle responses.
|
|
func New(cfg config.OracleConfiguration, log *zap.Logger) oracle.Broadcaster {
|
|
if cfg.ResponseTimeout == 0 {
|
|
cfg.ResponseTimeout = defaultSendTimeout
|
|
}
|
|
r := &oracleBroadcaster{
|
|
RPCBroadcaster: *rpcbroadcaster.NewRPCBroadcaster(log, cfg.ResponseTimeout),
|
|
}
|
|
for i := range cfg.Nodes {
|
|
r.Clients[cfg.Nodes[i]] = r.NewRPCClient(cfg.Nodes[i], (*client.Client).SubmitRawOracleResponse,
|
|
cfg.ResponseTimeout, make(chan request.RawParams, defaultChanCapacity))
|
|
}
|
|
return r
|
|
}
|
|
|
|
// SendResponse implements interfaces.Broadcaster.
|
|
func (r *oracleBroadcaster) SendResponse(priv *keys.PrivateKey, resp *transaction.OracleResponse, txSig []byte) {
|
|
pub := priv.PublicKey()
|
|
data := GetMessage(pub.Bytes(), resp.ID, txSig)
|
|
msgSig := priv.Sign(data)
|
|
params := request.NewRawParams(
|
|
base64.StdEncoding.EncodeToString(pub.Bytes()),
|
|
resp.ID,
|
|
base64.StdEncoding.EncodeToString(txSig),
|
|
base64.StdEncoding.EncodeToString(msgSig),
|
|
)
|
|
r.Responses <- params
|
|
}
|
|
|
|
// GetMessage returns data which is signed upon sending response by RPC.
|
|
func GetMessage(pubBytes []byte, reqID uint64, txSig []byte) []byte {
|
|
data := make([]byte, len(pubBytes)+8+len(txSig))
|
|
copy(data, pubBytes)
|
|
binary.LittleEndian.PutUint64(data[len(pubBytes):], uint64(reqID))
|
|
copy(data[len(pubBytes)+8:], txSig)
|
|
return data
|
|
}
|