package api import ( "math/big" "github.com/ethereum/go-ethereum/eth" "github.com/ethereum/go-ethereum/rpc/codec" "github.com/ethereum/go-ethereum/rpc/shared" "github.com/ethereum/go-ethereum/xeth" ) const ( ShhApiVersion = "1.0" ) var ( // mapping between methods and handlers shhMapping = map[string]shhhandler{ "shh_version": (*shhApi).Version, "shh_post": (*shhApi).Post, "shh_hasIdentity": (*shhApi).HasIdentity, "shh_newIdentity": (*shhApi).NewIdentity, "shh_newFilter": (*shhApi).NewFilter, "shh_uninstallFilter": (*shhApi).UninstallFilter, "shh_getFilterChanges": (*shhApi).GetFilterChanges, } ) func newWhisperOfflineError(method string) error { return shared.NewNotAvailableError(method, "whisper offline") } // net callback handler type shhhandler func(*shhApi, *shared.Request) (interface{}, error) // shh api provider type shhApi struct { xeth *xeth.XEth ethereum *eth.Ethereum methods map[string]shhhandler codec codec.ApiCoder } // create a new whisper api instance func NewShhApi(xeth *xeth.XEth, eth *eth.Ethereum, coder codec.Codec) *shhApi { return &shhApi{ xeth: xeth, ethereum: eth, methods: shhMapping, codec: coder.New(nil), } } // collection with supported methods func (self *shhApi) Methods() []string { methods := make([]string, len(self.methods)) i := 0 for k := range self.methods { methods[i] = k i++ } return methods } // Execute given request func (self *shhApi) Execute(req *shared.Request) (interface{}, error) { if callback, ok := self.methods[req.Method]; ok { return callback(self, req) } return nil, shared.NewNotImplementedError(req.Method) } func (self *shhApi) Name() string { return shared.ShhApiName } func (self *shhApi) ApiVersion() string { return ShhApiVersion } func (self *shhApi) Version(req *shared.Request) (interface{}, error) { w := self.xeth.Whisper() if w == nil { return nil, newWhisperOfflineError(req.Method) } return w.Version(), nil } func (self *shhApi) Post(req *shared.Request) (interface{}, error) { w := self.xeth.Whisper() if w == nil { return nil, newWhisperOfflineError(req.Method) } args := new(WhisperMessageArgs) if err := self.codec.Decode(req.Params, &args); err != nil { return nil, err } err := w.Post(args.Payload, args.To, args.From, args.Topics, args.Priority, args.Ttl) if err != nil { return false, err } return true, nil } func (self *shhApi) HasIdentity(req *shared.Request) (interface{}, error) { w := self.xeth.Whisper() if w == nil { return nil, newWhisperOfflineError(req.Method) } args := new(WhisperIdentityArgs) if err := self.codec.Decode(req.Params, &args); err != nil { return nil, err } return w.HasIdentity(args.Identity), nil } func (self *shhApi) NewIdentity(req *shared.Request) (interface{}, error) { w := self.xeth.Whisper() if w == nil { return nil, newWhisperOfflineError(req.Method) } return w.NewIdentity(), nil } func (self *shhApi) NewFilter(req *shared.Request) (interface{}, error) { args := new(WhisperFilterArgs) if err := self.codec.Decode(req.Params, &args); err != nil { return nil, err } id := self.xeth.NewWhisperFilter(args.To, args.From, args.Topics) return newHexNum(big.NewInt(int64(id)).Bytes()), nil } func (self *shhApi) UninstallFilter(req *shared.Request) (interface{}, error) { args := new(FilterIdArgs) if err := self.codec.Decode(req.Params, &args); err != nil { return nil, err } return self.xeth.UninstallWhisperFilter(args.Id), nil } func (self *shhApi) GetFilterChanges(req *shared.Request) (interface{}, error) { w := self.xeth.Whisper() if w == nil { return nil, newWhisperOfflineError(req.Method) } // Retrieve all the new messages arrived since the last request args := new(FilterIdArgs) if err := self.codec.Decode(req.Params, &args); err != nil { return nil, err } return self.xeth.WhisperMessagesChanged(args.Id), nil } func (self *shhApi) GetMessages(req *shared.Request) (interface{}, error) { w := self.xeth.Whisper() if w == nil { return nil, newWhisperOfflineError(req.Method) } // Retrieve all the cached messages matching a specific, existing filter args := new(FilterIdArgs) if err := self.codec.Decode(req.Params, &args); err != nil { return nil, err } return self.xeth.WhisperMessages(args.Id), nil }