Merge old private repo into vulcanize

utils/utils.go

@@ -0,0 +1,76 @@
+package utils
+
+import (
+	"log"
+
+	"path/filepath"
+
+	"math/big"
+
+	"os"
+
+	"github.com/vulcanize/vulcanizedb/pkg/config"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/geth"
+	"github.com/vulcanize/vulcanizedb/pkg/repositories"
+)
+
+func LoadConfig(environment string) config.Config {
+	cfg, err := config.NewConfig(environment)
+	if err != nil {
+		log.Fatalf("Error loading config\n%v", err)
+	}
+	return cfg
+}
+
+func LoadPostgres(database config.Database, node core.Node) repositories.Postgres {
+	repository, err := repositories.NewPostgres(database, node)
+	if err != nil {
+		log.Fatalf("Error loading postgres\n%v", err)
+	}
+	return repository
+}
+
+func ReadAbiFile(abiFilepath string) string {
+	abiFilepath = AbsFilePath(abiFilepath)
+	abi, err := geth.ReadAbiFile(abiFilepath)
+	if err != nil {
+		log.Fatalf("Error reading ABI file at \"%s\"\n %v", abiFilepath, err)
+	}
+	return abi
+}
+
+func AbsFilePath(filePath string) string {
+	if !filepath.IsAbs(filePath) {
+		cwd, _ := os.Getwd()
+		filePath = filepath.Join(cwd, filePath)
+	}
+	return filePath
+}
+
+func GetAbi(abiFilepath string, contractHash string, network string) string {
+	var contractAbiString string
+	if abiFilepath != "" {
+		contractAbiString = ReadAbiFile(abiFilepath)
+	} else {
+		url := geth.GenUrl(network)
+		etherscan := geth.NewEtherScanClient(url)
+		log.Printf("No ABI supplied. Retrieving ABI from Etherscan: %s", url)
+		contractAbiString, _ = etherscan.GetAbi(contractHash)
+	}
+	_, err := geth.ParseAbi(contractAbiString)
+	if err != nil {
+		log.Fatalln("Invalid ABI")
+	}
+	return contractAbiString
+}
+
+func RequestedBlockNumber(blockNumber *int64) *big.Int {
+	var _blockNumber *big.Int
+	if *blockNumber == -1 {
+		_blockNumber = nil
+	} else {
+		_blockNumber = big.NewInt(*blockNumber)
+	}
+	return _blockNumber
+}