diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..8d09c99 --- /dev/null +++ b/.gitignore @@ -0,0 +1,21 @@ +# Binaries for programs and plugins +*.exe +*.dll +*.so +*.dylib + +# Test binary, build with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out +coverage.html + +# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736 +.glide/ + +# Vim +*.sw? + +# Local TODO +TODO.md diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..d5f264c --- /dev/null +++ b/LICENSE @@ -0,0 +1,174 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. diff --git a/api/v1/queuedproposer.go b/api/v1/queuedproposer.go new file mode 100644 index 0000000..36e56f9 --- /dev/null +++ b/api/v1/queuedproposer.go @@ -0,0 +1,80 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package v1 + +import ( + "encoding/json" + "fmt" + "strconv" + + v1 "github.com/attestantio/go-builder-client/api/v1" + "github.com/attestantio/go-eth2-client/spec/phase0" + "github.com/pkg/errors" +) + +// QueuedProposer represents a queued proposer. +type QueuedProposer struct { + Slot phase0.Slot + Entry *v1.SignedValidatorRegistration +} + +// queuedProposerJSON is the spec representation of the struct. +type queuedProposerJSON struct { + Slot string `json:"slot"` + Entry *v1.SignedValidatorRegistration `json:"entry"` +} + +// MarshalJSON implements json.Marshaler. +func (q *QueuedProposer) MarshalJSON() ([]byte, error) { + return json.Marshal(&queuedProposerJSON{ + Slot: fmt.Sprintf("%d", q.Slot), + Entry: q.Entry, + }) +} + +// UnmarshalJSON implements json.Unmarshaler. +func (q *QueuedProposer) UnmarshalJSON(input []byte) error { + var data queuedProposerJSON + if err := json.Unmarshal(input, &data); err != nil { + return errors.Wrap(err, "invalid JSON") + } + return q.unpack(&data) +} + +func (q *QueuedProposer) unpack(data *queuedProposerJSON) error { + if data.Slot == "" { + return errors.New("slot missing") + } + slot, err := strconv.ParseUint(data.Slot, 10, 64) + if err != nil { + return errors.Wrap(err, "invalid value for slot") + } + q.Slot = phase0.Slot(slot) + + if data.Entry == nil { + return errors.New("entry missing") + } + q.Entry = data.Entry + + return nil +} + +// String returns a string version of the structure. +func (q *QueuedProposer) String() string { + data, err := json.Marshal(q) + if err != nil { + return fmt.Sprintf("ERR: %v", err) + } + return string(data) +} diff --git a/api/v1/queuedproposer_test.go b/api/v1/queuedproposer_test.go new file mode 100644 index 0000000..86ee4f0 --- /dev/null +++ b/api/v1/queuedproposer_test.go @@ -0,0 +1,90 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package v1_test + +import ( + "encoding/json" + "testing" + + v1 "github.com/attestantio/go-relay-client/api/v1" + require "github.com/stretchr/testify/require" + "gotest.tools/assert" +) + +func TestQueuedProposer(t *testing.T) { + tests := []struct { + name string + input []byte + err string + }{ + { + name: "Empty", + err: "unexpected end of JSON input", + }, + { + name: "JSONBad", + input: []byte("[]"), + err: "invalid JSON: json: cannot unmarshal array into Go value of type v1.queuedProposerJSON", + }, + { + name: "SlotMissing", + input: []byte(`{"entry":{"message":{"fee_recipient":"0x388ea662ef2c223ec0b047d41bf3c0f362142ad5","gas_limit":"30000000","timestamp":"1663144444","pubkey":"0xa35e34e6aff03a0e37e0aeeeb2629ba3b503b285ddc75ff2ef8dc854653d833af289f0458cd614e3906ec5e9627b31db"},"signature":"0xb735529068b64c24c7650b08ddb09d543b79030888801176d2708f0e0c863a965fc1ba03f8fb14e5b3b486386e1f147b13848c218e143b513886a0f210c096bd03077fcac658c39402f2ca9075422a6df6b54f17f4141334239f9f9ff8137be0"}}`), + err: "slot missing", + }, + { + name: "SlotWrongType", + input: []byte(`{"slot":true,"entry":{"message":{"fee_recipient":"0x388ea662ef2c223ec0b047d41bf3c0f362142ad5","gas_limit":"30000000","timestamp":"1663144444","pubkey":"0xa35e34e6aff03a0e37e0aeeeb2629ba3b503b285ddc75ff2ef8dc854653d833af289f0458cd614e3906ec5e9627b31db"},"signature":"0xb735529068b64c24c7650b08ddb09d543b79030888801176d2708f0e0c863a965fc1ba03f8fb14e5b3b486386e1f147b13848c218e143b513886a0f210c096bd03077fcac658c39402f2ca9075422a6df6b54f17f4141334239f9f9ff8137be0"}}`), + err: "invalid JSON: json: cannot unmarshal bool into Go struct field queuedProposerJSON.slot of type string", + }, + { + name: "SlotInvalid", + input: []byte(`{"slot":"true","entry":{"message":{"fee_recipient":"0x388ea662ef2c223ec0b047d41bf3c0f362142ad5","gas_limit":"30000000","timestamp":"1663144444","pubkey":"0xa35e34e6aff03a0e37e0aeeeb2629ba3b503b285ddc75ff2ef8dc854653d833af289f0458cd614e3906ec5e9627b31db"},"signature":"0xb735529068b64c24c7650b08ddb09d543b79030888801176d2708f0e0c863a965fc1ba03f8fb14e5b3b486386e1f147b13848c218e143b513886a0f210c096bd03077fcac658c39402f2ca9075422a6df6b54f17f4141334239f9f9ff8137be0"}}`), + err: "invalid value for slot: strconv.ParseUint: parsing \"true\": invalid syntax", + }, + { + name: "EntryMissing", + input: []byte(`{"slot":"3887273"}`), + err: "entry missing", + }, + { + name: "EntryWrongType", + input: []byte(`{"slot":"3887273","entry":true}`), + err: "invalid JSON: invalid JSON: json: cannot unmarshal bool into Go value of type v1.signedValidatorRegistrationJSON", + }, + { + name: "EntryInvalid", + input: []byte(`{"slot":"3887273","entry":{}}`), + err: "invalid JSON: message missing", + }, + { + name: "Good", + input: []byte(`{"slot":"3887273","entry":{"message":{"fee_recipient":"0x388ea662ef2c223ec0b047d41bf3c0f362142ad5","gas_limit":"30000000","timestamp":"1663144444","pubkey":"0xa35e34e6aff03a0e37e0aeeeb2629ba3b503b285ddc75ff2ef8dc854653d833af289f0458cd614e3906ec5e9627b31db"},"signature":"0xb735529068b64c24c7650b08ddb09d543b79030888801176d2708f0e0c863a965fc1ba03f8fb14e5b3b486386e1f147b13848c218e143b513886a0f210c096bd03077fcac658c39402f2ca9075422a6df6b54f17f4141334239f9f9ff8137be0"}}`), + }, + } + + for _, test := range tests { + t.Run(test.name, func(t *testing.T) { + var res v1.QueuedProposer + err := json.Unmarshal(test.input, &res) + if test.err != "" { + require.EqualError(t, err, test.err) + } else { + require.NoError(t, err) + rt, err := json.Marshal(&res) + require.NoError(t, err) + assert.Equal(t, string(test.input), string(rt)) + } + }) + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..342356c --- /dev/null +++ b/go.mod @@ -0,0 +1,41 @@ +module github.com/attestantio/go-relay-client + +go 1.18 + +require ( + github.com/attestantio/go-builder-client v0.1.6 + github.com/attestantio/go-eth2-client v0.13.6 + github.com/pkg/errors v0.9.1 + github.com/prometheus/client_golang v1.13.0 + github.com/rs/zerolog v1.28.0 + github.com/stretchr/testify v1.7.0 + gotest.tools v2.2.0+incompatible +) + +require ( + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/fatih/color v1.13.0 // indirect + github.com/ferranbt/fastssz v0.1.1 // indirect + github.com/goccy/go-yaml v1.9.5 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/google/go-cmp v0.5.8 // indirect + github.com/holiman/uint256 v1.2.0 // indirect + github.com/klauspost/cpuid/v2 v2.1.0 // indirect + github.com/mattn/go-colorable v0.1.12 // indirect + github.com/mattn/go-isatty v0.0.14 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect + github.com/minio/sha256-simd v1.0.0 // indirect + github.com/mitchellh/mapstructure v1.5.0 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/prometheus/client_model v0.2.0 // indirect + github.com/prometheus/common v0.37.0 // indirect + github.com/prometheus/procfs v0.8.0 // indirect + github.com/prysmaticlabs/go-bitfield v0.0.0-20210809151128-385d8c5e3fb7 // indirect + golang.org/x/sys v0.0.0-20220731174439-a90be440212d // indirect + golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect + google.golang.org/protobuf v1.28.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..91d356e --- /dev/null +++ b/go.sum @@ -0,0 +1,560 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M= +cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc= +cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk= +cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs= +cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc= +cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY= +cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= +cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE= +cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc= +cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg= +cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc= +cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk= +cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= +cloud.google.com/go/pubsub 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+// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http + +import ( + "fmt" + "strings" + + "github.com/pkg/errors" +) + +// ContentType defines the builder spec version. +type ContentType int + +const ( + // ContentTypeUnknown implies an unknown content type. + ContentTypeUnknown ContentType = iota + // ContentTypeSSZ implies an SSZ content type. + ContentTypeSSZ + // ContentTypeJSON implies a JSON content type. + ContentTypeJSON +) + +var contentTypeStrings = [...]string{ + "Unknown", + "SSZ", + "JSON", +} + +// MarshalJSON implements json.Marshaler. +func (c *ContentType) MarshalJSON() ([]byte, error) { + return []byte(fmt.Sprintf("%q", contentTypeStrings[*c])), nil +} + +// UnmarshalJSON implements json.Unmarshaler. +func (c *ContentType) UnmarshalJSON(input []byte) error { + var err error + switch strings.ToUpper(string(input)) { + case `"SSZ"`: + *c = ContentTypeSSZ + case `"JSON"`: + *c = ContentTypeJSON + default: + *c = ContentTypeUnknown + err = fmt.Errorf("unrecognised content type %s", string(input)) + } + return err +} + +// String returns a string representation of the +func (c ContentType) String() string { + if int(c) >= len(contentTypeStrings) { + return contentTypeStrings[0] + } + return contentTypeStrings[c] +} + +// ParseFromMediaType parses a content type string as per +// http://www.iana.org/assignments/media-types/media-types.xhtml +func ParseFromMediaType(input string) (ContentType, error) { + if input == "" { + return ContentTypeUnknown, errors.New("no content type supplied") + } + + switch strings.ToLower(input) { + case "application/octet-stream": + return ContentTypeSSZ, nil + case "application/json": + return ContentTypeJSON, nil + default: + return ContentTypeUnknown, fmt.Errorf("unrecognised content type %s", input) + } +} + +// MediaType returns the IANA name of the media type. +func (c ContentType) MediaType() string { + switch c { + case ContentTypeJSON: + return "application/json" + case ContentTypeSSZ: + return "application/octet-stream" + default: + return "unknown" + } +} diff --git a/http/http.go b/http/http.go new file mode 100644 index 0000000..1667452 --- /dev/null +++ b/http/http.go @@ -0,0 +1,171 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http + +import ( + "bytes" + "context" + "fmt" + "io" + "io/ioutil" + "math/rand" + "net/http" + "net/url" + "strings" + "time" + + consensusspec "github.com/attestantio/go-eth2-client/spec" + "github.com/pkg/errors" +) + +func init() { + // We seed math.rand here so that we can obtain different IDs for requests. + // This is purely used as a way to match request and response entries in logs, so there is no + // requirement for this to cryptographically secure. + rand.Seed(time.Now().UnixNano()) +} + +// get sends an HTTP get request and returns the body. +// If the response from the server is a 404 this will return nil for both the reader and the error. +func (s *Service) get(ctx context.Context, endpoint string) (ContentType, io.Reader, error) { + // #nosec G404 + log := log.With().Str("id", fmt.Sprintf("%02x", rand.Int31())).Str("endpoint", endpoint).Str("address", s.address).Logger() + log.Trace().Msg("GET request") + + url, err := url.Parse(fmt.Sprintf("%s%s", strings.TrimSuffix(s.base.String(), "/"), endpoint)) + if err != nil { + return ContentTypeUnknown, nil, errors.Wrap(err, "invalid endpoint") + } + + opCtx, cancel := context.WithTimeout(ctx, s.timeout) + req, err := http.NewRequestWithContext(opCtx, http.MethodGet, url.String(), nil) + if err != nil { + cancel() + return ContentTypeUnknown, nil, errors.Wrap(err, "failed to create GET request") + } + + // Prefer SSZ if available. + req.Header.Set("Accept", "application/octet-stream;q=1,application/json;q=0.9") + resp, err := s.client.Do(req) + if err != nil { + cancel() + return ContentTypeUnknown, nil, errors.Wrap(err, "failed to call GET endpoint") + } + + if resp.StatusCode == 404 { + // Nothing found. This is not an error, so we return nil on both counts. + cancel() + return ContentTypeUnknown, nil, nil + } + + data, err := ioutil.ReadAll(resp.Body) + if err != nil { + cancel() + return ContentTypeUnknown, nil, errors.Wrap(err, "failed to read GET response") + } + + log.Trace().RawJSON("response", bytes.TrimSuffix(data, []byte{0x0a})).Msg("GET response") + + statusFamily := resp.StatusCode / 100 + if statusFamily != 2 { + cancel() + log.Trace().Int("status_code", resp.StatusCode).RawJSON("response", bytes.TrimSuffix(data, []byte{0x0a})).Msg("GET failed") + return ContentTypeUnknown, nil, fmt.Errorf("GET failed with status %d: %s", resp.StatusCode, string(data)) + } + cancel() + + contentType, err := contentTypeFromResp(resp) + if err != nil { + // For now, assume that unknown type is JSON. + log.Debug().Err(err).Msg("Failed to obtain content type; assuming JSON") + contentType = ContentTypeJSON + // return ContentTypeUnknown, nil, err + } + + return contentType, bytes.NewReader(data), nil +} + +// post sends an HTTP post request and returns the body. +func (s *Service) post(ctx context.Context, endpoint string, contentType ContentType, body io.Reader) (ContentType, io.Reader, error) { + // #nosec G404 + log := log.With().Str("id", fmt.Sprintf("%02x", rand.Int31())).Str("endpoint", endpoint).Str("address", s.address).Logger() + if e := log.Trace(); e.Enabled() { + bodyBytes, err := ioutil.ReadAll(body) + if err != nil { + return ContentTypeUnknown, nil, errors.New("failed to read request body") + } + body = bytes.NewReader(bodyBytes) + + e.RawJSON("body", bodyBytes).Msg("POST request") + } + + url, err := url.Parse(fmt.Sprintf("%s%s", strings.TrimSuffix(s.base.String(), "/"), endpoint)) + if err != nil { + return ContentTypeUnknown, nil, errors.Wrap(err, "invalid endpoint") + } + + opCtx, cancel := context.WithTimeout(ctx, s.timeout) + req, err := http.NewRequestWithContext(opCtx, http.MethodPost, url.String(), body) + if err != nil { + cancel() + log.Trace().Err(err).Msg("Failed to create POST endpoint") + return ContentTypeUnknown, nil, errors.Wrap(err, "failed to create POST request") + } + + req.Header.Set("Content-type", contentType.MediaType()) + // Prefer SSZ if available. + req.Header.Set("Accept", "application/octet-stream;q=1,application/json;q=0.9") + resp, err := s.client.Do(req) + if err != nil { + cancel() + log.Trace().Err(err).Msg("Failed to call POST endpoint") + return ContentTypeUnknown, nil, errors.Wrap(err, "failed to call POST endpoint") + } + + data, err := ioutil.ReadAll(resp.Body) + if err != nil { + cancel() + log.Trace().Err(err).Msg("Failed to read POST response") + return ContentTypeUnknown, nil, errors.Wrap(err, "failed to read POST response") + } + + statusFamily := resp.StatusCode / 100 + if statusFamily != 2 { + log.Trace().Int("status_code", resp.StatusCode).RawJSON("response", bytes.TrimSuffix(data, []byte{0x0a})).Msg("POST failed") + cancel() + log.Trace().Err(err).Msg("POST failed with status") + return ContentTypeUnknown, nil, fmt.Errorf("POST failed with status %d: %s", resp.StatusCode, string(data)) + } + cancel() + + log.Trace().RawJSON("response", bytes.TrimSuffix(data, []byte{0x0a})).Msg("POST response") + + return contentType, bytes.NewReader(data), nil +} + +// responseMetadata returns metadata related to responses. +type responseMetadata struct { + Version consensusspec.DataVersion `json:"version"` +} + +func contentTypeFromResp(resp *http.Response) (ContentType, error) { + respContentType, exists := resp.Header["Content-Type"] + if !exists { + return ContentTypeUnknown, errors.New("no content type supplied in response") + } + if len(respContentType) != 1 { + return ContentTypeUnknown, fmt.Errorf("malformed content type (%d entries)", len(respContentType)) + } + return ParseFromMediaType(respContentType[0]) +} diff --git a/http/main_test.go b/http/main_test.go new file mode 100644 index 0000000..7a84ac4 --- /dev/null +++ b/http/main_test.go @@ -0,0 +1,32 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http_test + +import ( + "os" + "testing" + "time" + + "github.com/rs/zerolog" +) + +// timeout for tests. +var timeout = 60 * time.Second + +func TestMain(m *testing.M) { + zerolog.SetGlobalLevel(zerolog.Disabled) + if os.Getenv("HTTP_ADDRESS") != "" { + os.Exit(m.Run()) + } +} diff --git a/http/metrics.go b/http/metrics.go new file mode 100644 index 0000000..5c8f9e9 --- /dev/null +++ b/http/metrics.go @@ -0,0 +1,81 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http + +import ( + "context" + "time" + + "github.com/attestantio/go-eth2-client/metrics" + "github.com/prometheus/client_golang/prometheus" +) + +var operationsCounter *prometheus.CounterVec +var operationsTimer *prometheus.HistogramVec + +func registerMetrics(ctx context.Context, monitor metrics.Service) error { + if operationsCounter != nil { + // Already registered. + return nil + } + if monitor == nil { + // No monitor. + return nil + } + if monitor.Presenter() == "prometheus" { + return registerPrometheusMetrics(ctx) + } + return nil +} + +// skipcq: RVV-B0012 +func registerPrometheusMetrics(ctx context.Context) error { + operationsCounter = prometheus.NewCounterVec(prometheus.CounterOpts{ + Namespace: "eth_builder_client", + Subsystem: "operations", + Name: "total", + Help: "The number of builder operations.", + }, []string{"server", "operation", "result"}) + if err := prometheus.Register(operationsCounter); err != nil { + return err + } + operationsTimer = prometheus.NewHistogramVec(prometheus.HistogramOpts{ + Namespace: "eth_builder_client", + Subsystem: "operations", + Name: "duration_seconds", + Help: "The time spent in builder operations.", + Buckets: []float64{ + 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, + 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, + 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, + 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, + }, + }, []string{"server", "operation"}) + return prometheus.Register(operationsTimer) +} + +// monitorOperation monitors an operation. +func monitorOperation(server string, operation string, succeeded bool, duration time.Duration) { + if operationsCounter == nil { + // Not registered. + return + } + + if succeeded { + operationsCounter.WithLabelValues(server, operation, "succeeded").Add(1) + operationsTimer.WithLabelValues(server, operation).Observe(duration.Seconds()) + } else { + operationsCounter.WithLabelValues(server, operation, "failed").Add(1) + } +} diff --git a/http/parameters.go b/http/parameters.go new file mode 100644 index 0000000..3f53cb8 --- /dev/null +++ b/http/parameters.go @@ -0,0 +1,90 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http + +import ( + "time" + + "github.com/attestantio/go-eth2-client/metrics" + "github.com/pkg/errors" + "github.com/rs/zerolog" +) + +type parameters struct { + logLevel zerolog.Level + monitor metrics.Service + address string + timeout time.Duration +} + +// Parameter is the interface for service parameters. +type Parameter interface { + apply(*parameters) +} + +type parameterFunc func(*parameters) + +func (f parameterFunc) apply(p *parameters) { + f(p) +} + +// WithLogLevel sets the log level for the module. +func WithLogLevel(logLevel zerolog.Level) Parameter { + return parameterFunc(func(p *parameters) { + p.logLevel = logLevel + }) +} + +// WithMonitor sets the monitor for the module. +func WithMonitor(monitor metrics.Service) Parameter { + return parameterFunc(func(p *parameters) { + p.monitor = monitor + }) +} + +// WithAddress provides the address for the endpoint. +func WithAddress(address string) Parameter { + return parameterFunc(func(p *parameters) { + p.address = address + }) +} + +// WithTimeout sets the maximum duration for all requests to the endpoint. +func WithTimeout(timeout time.Duration) Parameter { + return parameterFunc(func(p *parameters) { + p.timeout = timeout + }) +} + +// parseAndCheckParameters parses and checks parameters to ensure that mandatory parameters are present and correct. +func parseAndCheckParameters(params ...Parameter) (*parameters, error) { + parameters := parameters{ + logLevel: zerolog.GlobalLevel(), + timeout: 2 * time.Second, + } + for _, p := range params { + if params != nil { + p.apply(¶meters) + } + } + + if parameters.address == "" { + return nil, errors.New("no address specified") + } + if parameters.timeout == 0 { + return nil, errors.New("no timeout specified") + } + + return ¶meters, nil +} diff --git a/http/queuedproposers.go b/http/queuedproposers.go new file mode 100644 index 0000000..9599089 --- /dev/null +++ b/http/queuedproposers.go @@ -0,0 +1,55 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http + +import ( + "context" + "encoding/json" + "fmt" + "time" + + v1 "github.com/attestantio/go-relay-client/api/v1" + "github.com/pkg/errors" +) + +// QueuedProposers provides information on the proposers queued to obtain a blinded block. +func (s *Service) QueuedProposers(ctx context.Context) ([]*v1.QueuedProposer, error) { + started := time.Now() + + url := "/relay/v1/builder/validators" + + contentType, respBodyReader, err := s.get(ctx, url) + if err != nil { + log.Trace().Str("url", url).Err(err).Msg("Request failed") + monitorOperation(s.Address(), "builder bid", false, time.Since(started)) + return nil, errors.Wrap(err, "failed to request queued proposers") + } + if respBodyReader == nil { + monitorOperation(s.Address(), "builder bid", false, time.Since(started)) + return nil, errors.New("failed to obtain queued proposers") + } + + res := make([]*v1.QueuedProposer, 0) + switch contentType { + case ContentTypeJSON: + if err := json.NewDecoder(respBodyReader).Decode(&res); err != nil { + return nil, errors.Wrap(err, "failed to parse queued proposers") + } + default: + return nil, fmt.Errorf("unsupported content type %v", contentType) + } + + monitorOperation(s.Address(), "queued proposers", true, time.Since(started)) + return res, nil +} diff --git a/http/queuedproposers_test.go b/http/queuedproposers_test.go new file mode 100644 index 0000000..6122656 --- /dev/null +++ b/http/queuedproposers_test.go @@ -0,0 +1,48 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http_test + +import ( + "context" + "os" + "testing" + + client "github.com/attestantio/go-relay-client" + "github.com/attestantio/go-relay-client/http" + "github.com/stretchr/testify/require" +) + +func TestQueuedProposers(t *testing.T) { + tests := []struct { + name string + }{ + { + name: "Good", + }, + } + + service, err := http.New(context.Background(), + http.WithTimeout(timeout), + http.WithAddress(os.Getenv("HTTP_ADDRESS")), + ) + require.NoError(t, err) + + for _, test := range tests { + t.Run(test.name, func(t *testing.T) { + proposers, err := service.(client.QueuedProposersProvider).QueuedProposers(context.Background()) + require.NoError(t, err) + require.NotNil(t, proposers) + }) + } +} diff --git a/http/service.go b/http/service.go new file mode 100644 index 0000000..d182d64 --- /dev/null +++ b/http/service.go @@ -0,0 +1,136 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package http + +import ( + "context" + "encoding/hex" + "fmt" + "net" + "net/http" + "net/url" + "strings" + "time" + + builderclient "github.com/attestantio/go-builder-client" + "github.com/attestantio/go-eth2-client/spec/phase0" + "github.com/pkg/errors" + "github.com/rs/zerolog" + zerologger "github.com/rs/zerolog/log" +) + +// Service is an Ethereum 2 client service. +type Service struct { + base *url.URL + address string + client *http.Client + timeout time.Duration + pubkey *phase0.BLSPubKey +} + +// log is a service-wide logger. +var log zerolog.Logger + +// New creates a new builder client service, connecting with HTTP. +func New(ctx context.Context, params ...Parameter) (builderclient.Service, error) { + parameters, err := parseAndCheckParameters(params...) + if err != nil { + return nil, errors.Wrap(err, "problem with parameters") + } + + // Set logging. + log = zerologger.With().Str("service", "client").Str("impl", "http").Logger() + if parameters.logLevel != log.GetLevel() { + log = log.Level(parameters.logLevel) + } + + if parameters.monitor != nil { + if err := registerMetrics(ctx, parameters.monitor); err != nil { + return nil, errors.Wrap(err, "problem registering metrics") + } + } + + client := &http.Client{ + Timeout: parameters.timeout, + Transport: &http.Transport{ + DialContext: (&net.Dialer{ + Timeout: parameters.timeout, + KeepAlive: 30 * time.Second, + DualStack: true, + }).DialContext, + MaxIdleConns: 64, + MaxConnsPerHost: 64, + MaxIdleConnsPerHost: 64, + IdleConnTimeout: 600 * time.Second, + }, + } + + address := parameters.address + if !strings.HasPrefix(address, "http") { + address = fmt.Sprintf("http://%s", parameters.address) + } + base, err := url.Parse(address) + if err != nil { + return nil, errors.Wrap(err, "invalid URL") + } + + // Obtain the public key from the URL's user. + var pubkey *phase0.BLSPubKey + if base.User != nil && base.User.Username() != "" { + key := phase0.BLSPubKey{} + data, err := hex.DecodeString(strings.TrimPrefix(base.User.Username(), "0x")) + if err != nil { + return nil, errors.Wrap(err, fmt.Sprintf("failed to parse public key %s", base.User.Username())) + } + copy(key[:], data) + pubkey = &key + + // Remove the user from the URL. + base.User = nil + } + s := &Service{ + base: base, + address: base.String(), + client: client, + timeout: parameters.timeout, + pubkey: pubkey, + } + + // Close the service on context done. + go func(s *Service) { + <-ctx.Done() + log.Trace().Msg("Context done; closing connection") + s.close() + }(s) + + return s, nil +} + +// Name provides the name of the service. +func (s *Service) Name() string { + return s.address +} + +// Address provides the address for the connection. +func (s *Service) Address() string { + return s.address +} + +// close closes the service, freeing up resources. +func (s *Service) close() {} + +// Pubkey returns the public key of the builder (if any). +func (s *Service) Pubkey() *phase0.BLSPubKey { + return s.pubkey +} diff --git a/metrics/service.go b/metrics/service.go new file mode 100644 index 0000000..961a416 --- /dev/null +++ b/metrics/service.go @@ -0,0 +1,21 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package metrics tracks various metrics that measure the performance of vouch. +package metrics + +// Service is the generic metrics service. +type Service interface { + // Presenter provides the presenter for this service. + Presenter() string +} diff --git a/service.go b/service.go new file mode 100644 index 0000000..710501e --- /dev/null +++ b/service.go @@ -0,0 +1,41 @@ +// Copyright © 2022 Attestant Limited. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package client + +import ( + "context" + + "github.com/attestantio/go-eth2-client/spec/phase0" + v1 "github.com/attestantio/go-relay-client/api/v1" +) + +// Service is the service providing a connection to an MEV relay. +type Service interface { + // Name returns the name of the relay implementation. + Name() string + + // Address returns the address of the relay. + Address() string + + // Pubkey returns the public key of the relay (if any). + Pubkey() *phase0.BLSPubKey +} + +// QueuedProposersProviders is the interface for providing queued proposer information. +type QueuedProposersProvider interface { + Service + + // QueuedProposers provides information on the proposers queued to obtain a blinded block. + QueuedProposers(ctx context.Context) ([]*v1.QueuedProposer, error) +}