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| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "encoding/json" |
| 6 | + "fmt" |
| 7 | + "log" |
| 8 | + "math/big" |
| 9 | + "os" |
| 10 | + "os/signal" |
| 11 | + "syscall" |
| 12 | + "time" |
| 13 | + |
| 14 | + "github.com/DIMO-Network/shared" |
| 15 | + "github.com/Shopify/sarama" |
| 16 | + ethereum "github.com/ethereum/go-ethereum" |
| 17 | + "github.com/ethereum/go-ethereum/accounts/abi" |
| 18 | + "github.com/ethereum/go-ethereum/common" |
| 19 | + "github.com/ethereum/go-ethereum/core/types" |
| 20 | + "github.com/ethereum/go-ethereum/ethclient" |
| 21 | + "github.com/rs/zerolog" |
| 22 | + "github.com/segmentio/ksuid" |
| 23 | +) |
| 24 | + |
| 25 | +func NewIssuanceContractListener(listener BlockListener, producer sarama.SyncProducer, logger *zerolog.Logger) (IssuanceContractListener, error) { |
| 26 | + return IssuanceContractListener{ |
| 27 | + Address: common.HexToAddress("0x8129f3cD3EBA82136Caf5aB87E2321c958Da5B63"), |
| 28 | + Producer: producer, |
| 29 | + Logger: logger, |
| 30 | + Listener: listener, |
| 31 | + }, nil |
| 32 | + |
| 33 | +} |
| 34 | + |
| 35 | +type IssuanceContractListener struct { |
| 36 | + Logger *zerolog.Logger |
| 37 | + Address common.Address |
| 38 | + Listener BlockListener |
| 39 | + Producer sarama.SyncProducer |
| 40 | +} |
| 41 | + |
| 42 | +func (rcl IssuanceContractListener) NextBlock() (*types.Header, error) { |
| 43 | + |
| 44 | + // pull latest block from redis |
| 45 | + // if redis is empty, get the most recent block on chain |
| 46 | + // return rcl.Listener.Client.HeaderByNumber(context.Background(), nil) |
| 47 | + |
| 48 | + head, err := rcl.Listener.Client.HeaderByNumber(context.Background(), nil) |
| 49 | + if err != nil { |
| 50 | + log.Fatal(err) |
| 51 | + } |
| 52 | + head.Number = big.NewInt(37850310) |
| 53 | + return head, nil |
| 54 | +} |
| 55 | + |
| 56 | +func (rcl IssuanceContractListener) IssuanceContractIndexer() { |
| 57 | + |
| 58 | + tick := time.NewTicker(2 * time.Second) |
| 59 | + defer tick.Stop() |
| 60 | + |
| 61 | + sigChan := make(chan os.Signal, 1) |
| 62 | + signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM) |
| 63 | + |
| 64 | + fmt.Println("Running...") |
| 65 | + |
| 66 | +Loop: |
| 67 | + for { |
| 68 | + select { |
| 69 | + case <-tick.C: |
| 70 | + |
| 71 | + head, err := rcl.NextBlock() |
| 72 | + |
| 73 | + block, err := rcl.Listener.Client.HeaderByNumber(context.Background(), new(big.Int).Sub(head.Number, rcl.Listener.Confirmations)) |
| 74 | + if err != nil { |
| 75 | + log.Fatal(err) |
| 76 | + } |
| 77 | + |
| 78 | + lastConf = &Block{Hash: block.Hash(), Number: block.Number} |
| 79 | + err = rcl.ProcessBlock(rcl.Listener.Client, lastConf) |
| 80 | + if err != nil { |
| 81 | + log.Fatal(err) |
| 82 | + } |
| 83 | + |
| 84 | + head.Number = new(big.Int).Add(head.Number, big.NewInt(1)) |
| 85 | + |
| 86 | + case sig := <-sigChan: |
| 87 | + log.Printf("Received signal, terminating: %s", sig) |
| 88 | + break Loop |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | +} |
| 93 | + |
| 94 | +func (rcl IssuanceContractListener) ProcessBlock(client *ethclient.Client, block *Block) error { |
| 95 | + log.Printf("Processing block %s", block.Number) |
| 96 | + |
| 97 | + fil := ethereum.FilterQuery{ |
| 98 | + BlockHash: &block.Hash, |
| 99 | + Addresses: []common.Address{rcl.Address}, |
| 100 | + } |
| 101 | + logs, err := client.FilterLogs(context.Background(), fil) |
| 102 | + if err != nil { |
| 103 | + return err |
| 104 | + } |
| 105 | + |
| 106 | + for _, vLog := range logs { |
| 107 | + if vLog.Removed { |
| 108 | + rcl.Logger.Info().Uint64("Block Number", vLog.BlockNumber).Msg("Log removed") |
| 109 | + } |
| 110 | + |
| 111 | + fmt.Println("Block Number: ", vLog.BlockNumber) |
| 112 | + if ev, ok := rcl.Listener.Registry[rcl.Address][vLog.Topics[0]]; ok { |
| 113 | + |
| 114 | + event := shared.CloudEvent[Event]{ |
| 115 | + ID: ksuid.New().String(), |
| 116 | + Source: string(vLog.Address.String()), |
| 117 | + Subject: vLog.TxHash.String(), |
| 118 | + Time: time.Now().UTC(), |
| 119 | + Data: Event{ |
| 120 | + Contract: vLog.Address.String(), |
| 121 | + Sig: vLog.Topics[0].String(), |
| 122 | + }} |
| 123 | + |
| 124 | + event.Data.Arguments = make(map[string]any) |
| 125 | + err = ev.Inputs.UnpackIntoMap(event.Data.Arguments, vLog.Data) |
| 126 | + var indexed abi.Arguments |
| 127 | + for _, arg := range ev.Inputs { |
| 128 | + if arg.Indexed { |
| 129 | + indexed = append(indexed, arg) |
| 130 | + } |
| 131 | + } |
| 132 | + // TODO-- topic slice looks odd, was getting mismatched length error before |
| 133 | + err = abi.ParseTopicsIntoMap(event.Data.Arguments, indexed, vLog.Topics[len(vLog.Topics)-len(indexed):]) |
| 134 | + if err != nil { |
| 135 | + log.Fatal(err) |
| 136 | + } |
| 137 | + |
| 138 | + eBytes, _ := json.Marshal(event) |
| 139 | + message := &sarama.ProducerMessage{Topic: rcl.Listener.EventStreamTopic, Key: sarama.StringEncoder(ksuid.New().String()), Value: sarama.ByteEncoder(eBytes)} |
| 140 | + _, _, err := rcl.Producer.SendMessage(message) |
| 141 | + if err != nil { |
| 142 | + rcl.Logger.Info().Str(rcl.Listener.EventStreamTopic, ev.Name).Msgf("error sending event to stream: %v", err) |
| 143 | + } |
| 144 | + |
| 145 | + } |
| 146 | + } |
| 147 | + |
| 148 | + return nil |
| 149 | +} |
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