panic: invalid private key: err blsSecretKeyDeserialize

[gg718]

I can't figure out why the following is panicking.

I generated a throwaway mnemonic for this example:

package main

import (
  "fmt"

  "github.com/wealdtech/go-ed25519hd"
  util "github.com/wealdtech/go-eth2-util"
)

func main() {
  mnemonic := "olympic salt stereo force iron tornado pilot inhale mandate banner play review auto tape lion absorb print nature element timber float identify world satoshi"

  seed, err := ed25519hd.SeedFromMnemonic(mnemonic, "")
  if err != nil {
    panic(err)
  }

  sk, err := util.PrivateKeyFromSeedAndPath(seed, "m/12381/3600/0/0/0")
  if err != nil {
    panic(err)
  }

  fmt.Printf("%x\n", sk.Marshal())
}

Output:

panic: invalid private key: err blsSecretKeyDeserialize 15db0f933b9c0f77602fbc57845810427a6d7bc9b79673bb213bc8cfda7ff690

But the key in the error message seems valid, so I'm not sure what the issue is?

[mcdee]

You must initialize the BLS system before using it.

package main

import (
    "fmt"

    "github.com/wealdtech/go-ed25519hd"
    e2types "github.com/wealdtech/go-eth2-types/v2"
    util "github.com/wealdtech/go-eth2-util"
)

func main() {
    mnemonic := "olympic salt stereo force iron tornado pilot inhale mandate banner play review auto tape lion absorb print nature element timber float identify world satoshi"

    seed, err := ed25519hd.SeedFromMnemonic(mnemonic, "")
    if err != nil {
        panic(err)
    }

    if err := e2types.InitBLS(); err != nil {
        panic(err)
    }

    sk, err := util.PrivateKeyFromSeedAndPath(seed, "m/12381/3600/0/0/0")
    if err != nil {
        panic(err)
    }

    fmt.Printf("%x\n", sk.Marshal())
}

[gg718]

My bad. All good now, thanks a lot!