68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
package api
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import (
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"fmt"
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peer "github.com/libp2p/go-libp2p-peer"
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ma "github.com/multiformats/go-multiaddr"
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)
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// PeersToStrings IDB58Encodes a list of peers.
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func PeersToStrings(peers []peer.ID) []string {
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strs := make([]string, len(peers))
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for i, p := range peers {
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if p != "" {
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strs[i] = peer.IDB58Encode(p)
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}
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}
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return strs
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}
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// StringsToPeers decodes peer.IDs from strings.
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func StringsToPeers(strs []string) []peer.ID {
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peers := make([]peer.ID, len(strs))
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for i, p := range strs {
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var err error
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peers[i], err = peer.IDB58Decode(p)
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if err != nil {
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logger.Error(p, err)
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}
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}
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return peers
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}
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// Libp2pMultiaddrSplit takes a LibP2P multiaddress (/<multiaddr>/ipfs/<peerID>)
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// and decapsulates it, parsing the peer ID. Returns an error if there is
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// any problem (for example, the provided address not being a Libp2p one).
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func Libp2pMultiaddrSplit(addr ma.Multiaddr) (peer.ID, ma.Multiaddr, error) {
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pid, err := addr.ValueForProtocol(ma.P_IPFS)
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if err != nil {
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err = fmt.Errorf("invalid peer multiaddress: %s: %s", addr, err)
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logger.Error(err)
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return "", nil, err
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}
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ipfs, _ := ma.NewMultiaddr("/ipfs/" + pid)
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decapAddr := addr.Decapsulate(ipfs)
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peerID, err := peer.IDB58Decode(pid)
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if err != nil {
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err = fmt.Errorf("invalid peer ID in multiaddress: %s: %s", pid, err)
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logger.Error(err)
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return "", nil, err
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}
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return peerID, decapAddr, nil
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}
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// MustLibp2pMultiaddrJoin takes a LibP2P multiaddress and a peer ID and
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// encapsulates a new /ipfs/<peerID> address. It will panic if the given
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// peer ID is bad.
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func MustLibp2pMultiaddrJoin(addr ma.Multiaddr, p peer.ID) ma.Multiaddr {
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pidAddr, err := ma.NewMultiaddr("/ipfs/" + peer.IDB58Encode(p))
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// let this break badly
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if err != nil {
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panic("called MustLibp2pMultiaddrJoin with bad peer!")
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}
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return addr.Encapsulate(pidAddr)
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}
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