From a543115d40f4affa79bdf40b7e0e6dce532ceb7e Mon Sep 17 00:00:00 2001 From: Mohammed Sohail Date: Tue, 14 Dec 2021 14:24:18 +0300 Subject: [PATCH] project: init --- cmd/node-health/main.go | 66 +++++++++++ config/config.toml | 8 ++ go.mod | 10 ++ go.sum | 219 ++++++++++++++++++++++++++++++++++++ internal/server/handlers.go | 52 +++++++++ internal/server/router.go | 17 +++ pkg/rpc/client.go | 30 +++++ 7 files changed, 402 insertions(+) create mode 100644 cmd/node-health/main.go create mode 100644 config/config.toml create mode 100644 go.mod create mode 100644 go.sum create mode 100644 internal/server/handlers.go create mode 100644 internal/server/router.go create mode 100644 pkg/rpc/client.go diff --git a/cmd/node-health/main.go b/cmd/node-health/main.go new file mode 100644 index 0000000..93b47f6 --- /dev/null +++ b/cmd/node-health/main.go @@ -0,0 +1,66 @@ +package main + +import ( + "fmt" + "strings" + + "github.com/gin-gonic/gin" + "github.com/knadh/koanf" + "github.com/knadh/koanf/parsers/toml" + "github.com/knadh/koanf/providers/env" + "github.com/knadh/koanf/providers/file" + "github.com/rs/zerolog" + "github.com/rs/zerolog/log" + + "git.grassecon.org/grassroots-economics/openethereum-node-status/internal/server" + "git.grassecon.org/grassroots-economics/openethereum-node-status/pkg/rpc" +) + +const ( + confEnvOverridePrefix = "" +) + +var ( + conf = koanf.New(".") +) + +func main() { + zerolog.TimeFieldFormat = zerolog.TimeFormatUnix + zerolog.SetGlobalLevel(zerolog.InfoLevel) + ginMode := gin.ReleaseMode + + // confini style config loading/overriding + confFile := file.Provider("config/config.toml") + + if err := conf.Load(confFile, toml.Parser()); err != nil { + log.Fatal(). + Err(err). + Str("service", "koanf"). + Msg("cannot load config file") + } + + if err := conf.Load(env.Provider(confEnvOverridePrefix, ".", func(s string) string { + return strings.ReplaceAll(strings.ToLower( + strings.TrimPrefix(s, confEnvOverridePrefix)), "_", ".") + }), nil); err != nil { + log.Fatal(). + Err(err). + Str("module", "main"). + Msg("cannot load env variables") + } + + if conf.Bool("debug.enabled") { + zerolog.SetGlobalLevel(zerolog.DebugLevel) + ginMode = gin.DebugMode + log.Debug().Str("module", "main").Msg("debug mode enabled") + } + + server.RpcClient = rpc.NewRpcClient(conf.String("rpc.endpoint")) + + if err := server.Start(fmt.Sprintf(":%s", conf.String("server.port")), ginMode); err != nil { + log.Fatal(). + Err(err). + Str("module", "main"). + Msg("could not start server") + } +} diff --git a/config/config.toml b/config/config.toml new file mode 100644 index 0000000..396d04d --- /dev/null +++ b/config/config.toml @@ -0,0 +1,8 @@ +[rpc] +endpoint = "https://core.bloxberg.org" + +[server] +port = "5555" + +[debug] +enabled = false diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..db8701e --- /dev/null +++ b/go.mod @@ -0,0 +1,10 @@ +module git.grassecon.org/grassroots-economics/openethereum-node-status + +go 1.16 + +require ( + github.com/gin-gonic/gin v1.7.7 + github.com/knadh/koanf v1.3.3 + github.com/rs/zerolog v1.26.0 + github.com/ybbus/jsonrpc/v2 v2.1.6 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..2086d32 --- /dev/null +++ b/go.sum @@ -0,0 +1,219 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY= +github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8= +github.com/aws/aws-sdk-go-v2 v1.9.2/go.mod h1:cK/D0BBs0b/oWPIcX/Z/obahJK1TT7IPVjy53i/mX/4= +github.com/aws/aws-sdk-go-v2/config v1.8.3/go.mod h1:4AEiLtAb8kLs7vgw2ZV3p2VZ1+hBavOc84hqxVNpCyw= +github.com/aws/aws-sdk-go-v2/credentials 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b/internal/server/handlers.go @@ -0,0 +1,52 @@ +package server + +import ( + "net/http" + + "github.com/gin-gonic/gin" + "github.com/rs/zerolog/log" + + "git.grassecon.org/grassroots-economics/openethereum-node-status/pkg/rpc" +) + +type ( + R struct { + Result string `json:"result"` + } + + P map[string]interface{} +) + +var ( + RpcClient rpc.RpcClient +) + +func metricsHandler(c *gin.Context) { + // pllholder rpc call + rpcResponse, err := RpcClient.EthRpcCall("eth_gasPrice") + if err != nil { + log.Error(). + Err(err). + Str("module", "server"). + Msg("rpc call failed") + } + + value, err := rpcResponse.GetString() + if err != nil { + log.Error(). + Err(err). + Str("module", "server"). + Msg("rpc response to string conversion failed") + } + + c.JSON(http.StatusOK, gin.H{ + "ok": true, + "data": value, + }) +} + +func healthHandler(c *gin.Context) { + c.JSON(http.StatusOK, gin.H{ + "ok": true, + }) +} diff --git a/internal/server/router.go b/internal/server/router.go new file mode 100644 index 0000000..82c9469 --- /dev/null +++ b/internal/server/router.go @@ -0,0 +1,17 @@ +package server + +import ( + "github.com/gin-gonic/gin" +) + +func Start(port string, ginMode string) error { + gin.SetMode(ginMode) + gin.DisableConsoleColor() + + router := gin.Default() + + router.GET("/metrics", metricsHandler) + router.GET("/health", healthHandler) + + return router.Run(port) +} diff --git a/pkg/rpc/client.go b/pkg/rpc/client.go new file mode 100644 index 0000000..1fc7712 --- /dev/null +++ b/pkg/rpc/client.go @@ -0,0 +1,30 @@ +package rpc + +import ( + "fmt" + + "github.com/ybbus/jsonrpc/v2" +) + +type RpcClient struct { + ethClient jsonrpc.RPCClient +} + +func NewRpcClient(endpoint string) RpcClient { + return RpcClient{ + ethClient: jsonrpc.NewClient(endpoint), + } +} + +func (r *RpcClient) EthRpcCall(method string) (*jsonrpc.RPCResponse, error) { + response, err := r.ethClient.Call(method) + if err != nil { + return response, err + } + + if response.Error != nil { + return response, fmt.Errorf("rpc client error: (code %d) %s", response.Error.Code, response.Error.Message) + } + + return response, nil +}