ipld-eth-server/utils/utils.go

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// VulcanizeDB
// Copyright © 2018 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package utils
import (
"log"
"math/big"
"os"
"path/filepath"
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"github.com/vulcanize/vulcanizedb/pkg/config"
"github.com/vulcanize/vulcanizedb/pkg/core"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"github.com/vulcanize/vulcanizedb/pkg/geth"
)
func LoadPostgres(database config.Database, node core.Node) postgres.DB {
db, err := postgres.NewDB(database, node)
if err != nil {
log.Fatalf("Error loading postgres\n%v", err)
}
return *db
}
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
}