1 files changed, 56 insertions, 0 deletions
diff --git a/rpc/api/mergedapi.go b/rpc/api/mergedapi.go
new file mode 100644
index 000000000..7784661d7
--- /dev/null
+++ b/rpc/api/mergedapi.go
@@ -0,0 +1,56 @@
+package api
+
+import "github.com/ethereum/go-ethereum/rpc/shared"
+
+// combines multiple API's
+type mergedApi struct {
+	apis []string
+	methods map[string]EthereumApi
+}
+
+// create new merged api instance
+func newMergedApi(apis ...EthereumApi) *mergedApi {
+	mergedApi := new(mergedApi)
+	mergedApi.apis = make([]string, len(apis))
+	mergedApi.methods = make(map[string]EthereumApi)
+
+	for i, api := range apis {
+		mergedApi.apis[i] = api.Name()
+		for _, method := range api.Methods() {
+			mergedApi.methods[method] = api
+		}
+	}
+	return mergedApi
+}
+
+// Supported RPC methods
+func (self *mergedApi) Methods() []string {
+	all := make([]string, len(self.methods))
+	for method, _ := range self.methods {
+		all = append(all, method)
+	}
+	return all
+}
+
+// Call the correct API's Execute method for the given request
+func (self *mergedApi) Execute(req *shared.Request) (interface{}, error) {
+	if res, _ := self.handle(req); res != nil {
+		return res, nil
+	}
+	if api, found := self.methods[req.Method]; found {
+		return api.Execute(req)
+	}
+	return nil, shared.NewNotImplementedError(req.Method)
+}
+
+func (self *mergedApi) Name() string {
+	return MergedApiName
+}
+
+func (self *mergedApi) handle(req *shared.Request) (interface{}, error) {
+	if req.Method == "support_apis" {	// provided API's
+		return self.apis, nil
+	}
+
+	return nil, nil
+}