VDB-117: Add Vow.flog transformer (#80)

* Add DB migrations for flog

* Add Vow addresses and constants

* Add err logging to ABI signature getter, test for flog sig

* Add flog transformer

* Add tests+data for flog transformer

* Prepend DB tables and columns with vow_

* Panic on failure to get method sig

pkg/transformers/test_data/mocks/flog/converter.go

@@ -0,0 +1,34 @@
+// Copyright 2018 Vulcanize
+//
+// 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 flog
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+type MockFlogConverter struct {
+	converterError error
+	PassedLogs     []types.Log
+}
+
+func (converter *MockFlogConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
+	converter.PassedLogs = ethLogs
+	return []interface{}{test_data.FlogModel}, converter.converterError
+}
+
+func (converter *MockFlogConverter) SetConverterError(e error) {
+	converter.converterError = e
+}

pkg/transformers/test_data/mocks/flog/repository.go

@@ -0,0 +1,70 @@
+// Copyright 2018 Vulcanize
+//
+// 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 flog
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type MockFlogRepository struct {
+	createError               error
+	missingHeaders            []core.Header
+	missingHeadersError       error
+	PassedStartingBlockNumber int64
+	PassedEndingBlockNumber   int64
+	PassedHeaderID            int64
+	PassedModels              []interface{}
+	CheckedHeaderIDs          []int64
+	CheckedHeaderError        error
+	SetDbCalled               bool
+}
+
+func (repository *MockFlogRepository) Create(headerID int64, models []interface{}) error {
+	repository.PassedHeaderID = headerID
+	repository.PassedModels = models
+	return repository.createError
+}
+
+func (repository *MockFlogRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	repository.PassedStartingBlockNumber = startingBlockNumber
+	repository.PassedEndingBlockNumber = endingBlockNumber
+	return repository.missingHeaders, repository.missingHeadersError
+}
+
+func (repository *MockFlogRepository) SetMissingHeadersError(e error) {
+	repository.missingHeadersError = e
+}
+
+func (repository *MockFlogRepository) SetMissingHeaders(headers []core.Header) {
+	repository.missingHeaders = headers
+}
+
+func (repository *MockFlogRepository) SetCreateError(e error) {
+	repository.createError = e
+}
+
+func (repository *MockFlogRepository) MarkHeaderChecked(headerId int64) error {
+	repository.CheckedHeaderIDs = append(repository.CheckedHeaderIDs, headerId)
+	return repository.CheckedHeaderError
+}
+
+func (repository *MockFlogRepository) SetCheckedHeaderError(e error) {
+	repository.CheckedHeaderError = e
+}
+
+func (repository *MockFlogRepository) SetDB(db *postgres.DB) {
+	repository.SetDbCalled = true
+}