waku-org/go-waku

package utils

import (
    "crypto/ecdsa"

    "github.com/btcsuite/btcd/btcec/v2"
    "github.com/libp2p/go-libp2p/core/crypto"
)

// EcdsaPubKeyToSecp256k1PublicKey converts an `ecdsa.PublicKey` into a libp2p `crypto.Secp256k1PublicKey“
func EcdsaPubKeyToSecp256k1PublicKey(pubKey *ecdsa.PublicKey) *crypto.Secp256k1PublicKey {
    xFieldVal := &btcec.FieldVal{}
    yFieldVal := &btcec.FieldVal{}
    xFieldVal.SetByteSlice(pubKey.X.Bytes())
    yFieldVal.SetByteSlice(pubKey.Y.Bytes())
    return (*crypto.Secp256k1PublicKey)(btcec.NewPublicKey(xFieldVal, yFieldVal))
}

// EcdsaPrivKeyToSecp256k1PrivKey converts an `ecdsa.PrivateKey` into a libp2p `crypto.Secp256k1PrivateKey“
func EcdsaPrivKeyToSecp256k1PrivKey(privKey *ecdsa.PrivateKey) *crypto.Secp256k1PrivateKey {
    privK, _ := btcec.PrivKeyFromBytes(privKey.D.Bytes())
    return (*crypto.Secp256k1PrivateKey)(privK)
}