Change response of event when there are no topics

[zakerikk]

Relative to: https://github.com/aurora-is-near/aurora-relayer/issues/280

package main

import (
    "context"
    "fmt"
    "github.com/ethereum/go-ethereum/ethclient"
    "github.com/ethereum/go-ethereum/common"
)

func main() {
    rpc := "https://mainnet.aurora.dev"
    // rpc := "http://localhost:8545"
    client, err := ethclient.Dial(rpc)
    if err != nil {
        panic(err)
    }

    txHash := common.HexToHash("0xd09dbc30579d2902ec6378ff5098b17b15aaa0ecac5bcd0ff5946bf64e55e7a4")
    receipt, err := client.TransactionReceipt(context.Background(), txHash)
    if err != nil {
        panic(err)
    }
    fmt.Printf("Receipt %+v\n", receipt)
}

Before:

$ go run index.go
panic: missing required field 'topics' for Log

goroutine 1 [running]:
main.main()
    /Users/zak/dev/aurora/go-examples/first/index.go:20 +0x11c
exit status 2

{
    "blockNumber": "0x3dfdf53",
    "blockHash": "0xd369a15a57899c0ff686243e5553d3f57ef5dc392f7252c7c43399bf0900c9a0",
    "transactionIndex": "0x0",
    "transactionHash": "0xd09dbc30579d2902ec6378ff5098b17b15aaa0ecac5bcd0ff5946bf64e55e7a4",
    "logIndex": "0xa",
    "address": "0xf968ae76b67e0ac34ebd27dbe7157c43ec6124e7",
    "topics": null,
    "data": "0x01b57416f6012a0bc42c30ac6cc15fac9bd938618bcaa1a1fae8501d0000000254b327dd6873c23d358a",
    "removed": false
},

After:

$ go run index.go

Receipt &{Type:0 PostState:[] Status:1 CumulativeGasUsed:0 Bloom:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] Logs:[0x1400013a4d0 0x1400013a580 0x1400013a630 0x1400013a6e0 0x1400013a790 0x1400013a840 0x1400013a8f0 0x1400013a9a0 0x1400013aa50 0x1400013ab00 0x1400013abb0 0x1400013ac60 0x1400013ad10] TxHash:0xd09dbc30579d2902ec6378ff5098b17b15aaa0ecac5bcd0ff5946bf64e55e7a4 ContractAddress:0x0000000000000000000000000000000000000000 GasUsed:181551 BlockHash:0xd369a15a57899c0ff686243e5553d3f57ef5dc392f7252c7c43399bf0900c9a0 BlockNumber:+65003347 TransactionIndex:0}

{
    "blockNumber": "0x3dfdf53",
    "blockHash": "0xd369a15a57899c0ff686243e5553d3f57ef5dc392f7252c7c43399bf0900c9a0",
    "transactionIndex": "0x0",
    "transactionHash": "0xd09dbc30579d2902ec6378ff5098b17b15aaa0ecac5bcd0ff5946bf64e55e7a4",
    "logIndex": "0xa",
    "address": "0xf968ae76b67e0ac34ebd27dbe7157c43ec6124e7",
    "topics": [],
    "data": "0x01b57416f6012a0bc42c30ac6cc15fac9bd938618bcaa1a1fae8501d0000000254b327dd6873c23d358a",
    "removed": false
},