services/friendbot: Instrument friendbot to emit traces #5796
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,4 +1,4 @@ | ||
| FROM golang:1.23-bullseye AS build | ||
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| ADD . /src/friendbot | ||
| WORKDIR /src/friendbot | ||
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@@ -7,4 +7,3 @@ num_minions = 1000 | |
| base_fee = 100000 | ||
| minion_batch_size = 50 | ||
| submit_tx_retries_allowed = 5 | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,54 +1,103 @@ | ||
| package internal | ||
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| import ( | ||
| "context" | ||
| "net/http" | ||
| "net/url" | ||
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| "github.com/stellar/go/protocols/horizon" | ||
| "github.com/stellar/go/strkey" | ||
| "github.com/stellar/go/support/render/hal" | ||
| "github.com/stellar/go/support/render/problem" | ||
| "go.opentelemetry.io/otel" | ||
| "go.opentelemetry.io/otel/attribute" | ||
| "go.opentelemetry.io/otel/codes" | ||
| "go.opentelemetry.io/otel/trace" | ||
| ) | ||
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| const ( | ||
| // Tracer name for friendbot service | ||
| tracerName = "stellar-friendbot" | ||
| ) | ||
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| // FriendbotHandler causes an account at `Address` to be created. | ||
| type FriendbotHandler struct { | ||
| Friendbot *Bot | ||
| tracer trace.Tracer | ||
| } | ||
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| // NewFriendbotHandler returns friendbot handler based on the tracing enabled | ||
| func NewFriendbotHandler(fb *Bot) *FriendbotHandler { | ||
| tracer := otel.Tracer(tracerName) | ||
| return &FriendbotHandler{ | ||
| Friendbot: fb, | ||
| tracer: tracer, | ||
| } | ||
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| } | ||
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| // Handle is a method that implements http.HandlerFunc | ||
| func (handler *FriendbotHandler) Handle(w http.ResponseWriter, r *http.Request) { | ||
| ctx, span := handler.tracer.Start(r.Context(), "friendbot.init_http_request") | ||
| defer span.End() | ||
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| // Add request attributes to span | ||
| span.SetAttributes( | ||
| attribute.String("http.method", r.Method), | ||
| attribute.String("http.url", r.URL.String()), | ||
| attribute.String("http.user_agent", r.UserAgent()), | ||
| ) | ||
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| result, err := handler.doHandle(ctx, r) | ||
| if err != nil { | ||
| problem.Render(r.Context(), w, err) | ||
| span.SetStatus(codes.Error, err.Error()) | ||
| return | ||
| } | ||
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| span.SetStatus(codes.Ok, codes.Ok.String()) | ||
| hal.Render(w, *result) | ||
| } | ||
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| // doHandle is just a convenience method that returns the object to be rendered | ||
| func (handler *FriendbotHandler) doHandle(ctx context.Context, r *http.Request) (*horizon.Transaction, error) { | ||
| ctx, span := handler.tracer.Start(ctx, "friendbot.parse_http_request") | ||
| defer span.End() | ||
| err := r.ParseForm() | ||
| if err != nil { | ||
| p := problem.BadRequest | ||
| p.Detail = "Request parameters are not escaped or incorrectly formatted." | ||
| span.SetStatus(codes.Error, err.Error()) | ||
| return nil, &p | ||
| } | ||
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| address, err := handler.loadAddress(ctx, r) | ||
| if err != nil { | ||
| span.SetStatus(codes.Error, err.Error()) | ||
| return nil, problem.MakeInvalidFieldProblem("addr", err) | ||
| } | ||
| span.SetStatus(codes.Ok, codes.Ok.String()) | ||
| return handler.Friendbot.Pay(ctx, address) | ||
| } | ||
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| func (handler *FriendbotHandler) loadAddress(ctx context.Context, r *http.Request) (string, error) { | ||
| _, span := handler.tracer.Start(ctx, "minion.destination_address") | ||
| defer span.End() | ||
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| address := r.Form.Get("addr") | ||
| if address == "" { | ||
| span.SetStatus(codes.Error, "missing destination account address") | ||
| span.SetAttributes(attribute.String("error.type", "missing_parameter")) | ||
| } | ||
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| unescaped, err := url.QueryUnescape(address) | ||
| if err != nil { | ||
| span.SetStatus(codes.Error, err.Error()) | ||
| return unescaped, err | ||
| } | ||
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| _, err = strkey.Decode(strkey.VersionByteAccountID, unescaped) | ||
| span.SetAttributes(attribute.String("destination.account", address)) | ||
| span.SetStatus(codes.Ok, codes.Ok.String()) | ||
| return unescaped, err | ||
| } | ||
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