cannot find package "github.com/cespare/xxhash/v2"

[reneba]

hi,

first. sorry for my english :)

I am relatively new to go programming. but I wanted to deal with it. I wanted to get the following code to work because I deal with go and go-ethereum.

But I always get the error below

Despite intensive google search and my meager english knowledge I could not find a solution. Unfortunately,
I do not know anybody who knows about go.

Maybe you can help me

Many thanks

--Error-
src\github.com\VictoriaMetrics\fastcache\bigcache.go:7:2: cannot find package "github.com/cespare/xxhash/v2" in any of: C:\Go\src\github.com\cespare\xxhash\v2 (from $GOROOT) C:\Users\go\src\github.com\cespare\xxhash\v2 (from $GOPATH)
--Code--
`package main

import (
"context"
"fmt"
"log"
"math"
"math/big"

"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethclient"

)

func main() {
client, err := ethclient.Dial("https://mainnet.infura.io")
if err != nil {
log.Fatal(err)
}

account := common.HexToAddress("0x71c7656ec7ab88b098defb751b7401b5f6d8976f")
balance, err := client.BalanceAt(context.Background(), account, nil)
if err != nil {
    log.Fatal(err)
}
fmt.Println(balance) // 25893180161173005034

blockNumber := big.NewInt(5532993)
balanceAt, err := client.BalanceAt(context.Background(), account, blockNumber)
if err != nil {
    log.Fatal(err)
}
fmt.Println(balanceAt) // 25729324269165216042

fbalance := new(big.Float)
fbalance.SetString(balanceAt.String())
ethValue := new(big.Float).Quo(fbalance, big.NewFloat(math.Pow10(18)))
fmt.Println(ethValue) // 25.729324269165216041

pendingBalance, err := client.PendingBalanceAt(context.Background(), account)
fmt.Println(pendingBalance) // 25729324269165216042

}`

[Thiamath]

Same here.
The Prometheus client since v1.2.0 is using your v2 package as a dependency and now is broken because of this.
https://github.com/prometheus/client_golang/blob/v1.2.0/go.mod

[superfell]

See #31 You need to be using go 1.11 or newer, what version of go are you running?

[cespare]

@reneba as @superfell said, you need to be using a recent enough version of Go that it has at least "minimal module compatibility". See the README. (You do not actually even need 1.11 -- 1.9.7+ and 1.10.3+ have the functionality backported.)

The key thing is that these versions of Go understand that when they are looking for /v2, they should find that in a v2 branch.

@Thiamath no, it is not "broken". See my explanation above.

In fact, I just confirmed that I can build all the packages in https://github.com/prometheus/client_golang using Go 1.9.7.

By the way, any Go project that wants to use my package is free to use the v1 module (github.com/cespare/xxhash). That will work even with ancient versions of Go. v1 works just fine (v2 just has some API improvements). The choice to use v2 is taken by projects that depend on my package, not by me.

[Thiamath]

Sorry for the delay...
I'm using go version 1.13.1
Maybe the problem is that my project is using dep to manage dependencies instead of go modules?
If that's the case, I'm not sure about how to fix that... I'm still a n00b in golang.

[cespare]

Yes, dep does not support v2+ modules.

[rohankeskar19]

Sorry for the delay...
I'm using go version 1.13.1
Maybe the problem is that my project is using dep to manage dependencies instead of go modules?
If that's the case, I'm not sure about how to fix that... I'm still a n00b in golang.

Use

go env

if

GO111MODULE

is not set
then use

set GO111MODULE=on

then try again

[Ericwonne]

@rohankeskar19 Thank you for saving my day! [Rose]