Ucanto private key to libp2p Peer ID and Peer ID to Ucanto public key

did-to-peer.go

package main

import (
	"fmt"

	"github.com/libp2p/go-libp2p/core/crypto"
	"github.com/libp2p/go-libp2p/core/peer"
	ed25519 "github.com/storacha/go-ucanto/principal/ed25519/verifier"
)

func main() {
	d, _ := ed25519.Parse("did:key:z6MkjS68sxgvgSnGXe62GSZgtXF3veGEqK3rBx8uvivAviWi")
	pub, _ := crypto.UnmarshalEd25519PublicKey(d.Raw())
	peerid, _ := peer.IDFromPublicKey(pub)
	fmt.Println(peerid.String())
}

libp2p-priv-to-did.go

package main

import (
	"fmt"

	"github.com/libp2p/go-libp2p/core/crypto"
	"github.com/libp2p/go-libp2p/core/peer"
	ed25519 "github.com/storacha/go-ucanto/principal/ed25519/verifier"
)

func main() {
	priv, _, _ := crypto.GenerateEd25519Key(nil)
	peerid, _ := peer.IDFromPrivateKey(priv)
	fmt.Println(peerid.String())

	pub, _ := peerid.ExtractPublicKey()
	pubBytes, _ := pub.Raw()
	verifier, _ := ed25519.FromRaw(pubBytes)
	fmt.Println(verifier.DID().String())
}

ucanto-priv-to-peer.go

package main

import (
	"fmt"

	"github.com/libp2p/go-libp2p/core/crypto"
	"github.com/libp2p/go-libp2p/core/peer"
	ed25519 "github.com/storacha/go-ucanto/principal/ed25519/signer"
)

var priv = ""

func main() {
	id, _ := ed25519.Parse(priv)
	priv, _ := crypto.UnmarshalEd25519PrivateKey(id.Raw())
	peerID, _ := peer.IDFromPrivateKey(priv)
	fmt.Println(peerID.String())
}