Get logs for a contract (#99)

* Add ability to fetch logs for a contract and a block

* Test contract related code against Infura, so can run on Travis

* Add godo task for getLogs

cmd/get_logs/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"flag"
+
+	"github.com/8thlight/vulcanizedb/cmd"
+	"github.com/8thlight/vulcanizedb/pkg/core"
+	"github.com/8thlight/vulcanizedb/pkg/geth"
+)
+
+func main() {
+	environment := flag.String("environment", "", "Environment name")
+	contractHash := flag.String("contract-hash", "", "Contract hash to show summary")
+	_blockNumber := flag.Int64("block-number", -1, "Block number of summary")
+	flag.Parse()
+	config := cmd.LoadConfig(*environment)
+	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockNumber := cmd.RequestedBlockNumber(_blockNumber)
+
+	logs, err := blockchain.GetLogs(core.Contract{Hash: *contractHash}, blockNumber)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	for _, l := range logs {
+		fmt.Println("\tAddress: ", l.Address)
+		fmt.Println("\tTxHash: ", l.TxHash)
+		fmt.Println("\tBlockNumber ", l.BlockNumber)
+		fmt.Println("\tTopics: ")
+		for i, topic := range l.Topics {
+			fmt.Printf("\t\tTopic %d: %s\n", i, topic)
+		}
+		fmt.Printf("\tData: %s", l.Data)
+		fmt.Print("\n\n")
+
+	}
+
+}

cmd/show_contract_summary/main.go

@@ -7,8 +7,6 @@ import (
 
 	"fmt"
 
-	"math/big"
-
 	"github.com/8thlight/vulcanizedb/cmd"
 	"github.com/8thlight/vulcanizedb/pkg/contract_summary"
 	"github.com/8thlight/vulcanizedb/pkg/geth"
@@ -22,7 +20,7 @@ func main() {
 	config := cmd.LoadConfig(*environment)
 	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
-	blockNumber := requestedBlockNumber(_blockNumber)
+	blockNumber := cmd.RequestedBlockNumber(_blockNumber)
 
 	contractSummary, err := contract_summary.NewSummary(blockchain, repository, *contractHash, blockNumber)
 	if err != nil {
@@ -31,13 +29,3 @@ func main() {
 	output := contract_summary.GenerateConsoleOutput(contractSummary)
 	fmt.Println(output)
 }
-
-func requestedBlockNumber(blockNumber *int64) *big.Int {
-	var _blockNumber *big.Int
-	if *blockNumber == -1 {
-		_blockNumber = nil
-	} else {
-		_blockNumber = big.NewInt(*blockNumber)
-	}
-	return _blockNumber
-}

cmd/utils.go

@@ -7,6 +7,8 @@ import (
 
 	"fmt"
 
+	"math/big"
+
 	"github.com/8thlight/vulcanizedb/pkg/config"
 	"github.com/8thlight/vulcanizedb/pkg/core"
 	"github.com/8thlight/vulcanizedb/pkg/geth"
@@ -55,3 +57,13 @@ func GetAbi(abiFilepath string, contractHash string) string {
 	}
 	return contractAbiString
 }
+
+func RequestedBlockNumber(blockNumber *int64) *big.Int {
+	var _blockNumber *big.Int
+	if *blockNumber == -1 {
+		_blockNumber = nil
+	} else {
+		_blockNumber = big.NewInt(*blockNumber)
+	}
+	return _blockNumber
+}