just some basic bip340 key functions instead.

keys.go

@@ -1,37 +1,21 @@
 package nostr
 
 import (
-	"crypto/ecdsa"
 	"encoding/hex"
 
-	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/crypto/secp256k1"
-	"github.com/tyler-smith/go-bip39"
+	"github.com/fiatjaf/bip340"
 )
 
-func PrivateKeyAsHex(key *ecdsa.PrivateKey) string {
-	skBytes := crypto.FromECDSA(key)
-	return hex.EncodeToString(skBytes)
+func GeneratePrivateKey() string {
+	return hex.EncodeToString(bip340.GeneratePrivateKey().Bytes())
 }
 
-func PrivateKeyAsMnemonic(key *ecdsa.PrivateKey) (string, error) {
-	skBytes := crypto.FromECDSA(key)
-	return bip39.NewMnemonic(skBytes)
-}
-
-func PublicKeyAsHex(key ecdsa.PublicKey) string {
-	return hex.EncodeToString(secp256k1.CompressPubkey(key.X, key.Y))
-}
-
-func GenerateKey() (*ecdsa.PrivateKey, error) {
-	return crypto.GenerateKey()
-}
-
-func PrivateKeyFromMnemonic(mnemonic string) (*ecdsa.PrivateKey, error) {
-	e, err := bip39.EntropyFromMnemonic(mnemonic)
+func GetPublicKey(sk string) (string, error) {
+	privateKey, err := bip340.ParsePrivateKey(sk)
 	if err != nil {
-		return &ecdsa.PrivateKey{}, err
+		return "", err
 	}
 
-	return crypto.ToECDSA(e)
+	publicKey := bip340.GetPublicKey(privateKey)
+	return hex.EncodeToString(publicKey[:]), nil
 }