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name.go
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/
name.go
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package coreapi
import (
"context"
"fmt"
"strings"
"time"
"github.com/ipfs/boxo/ipns"
keystore "github.com/ipfs/boxo/keystore"
"github.com/ipfs/boxo/namesys"
"github.com/ipfs/kubo/tracing"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"github.com/ipfs/boxo/path"
coreiface "github.com/ipfs/kubo/core/coreiface"
caopts "github.com/ipfs/kubo/core/coreiface/options"
ci "github.com/libp2p/go-libp2p/core/crypto"
peer "github.com/libp2p/go-libp2p/core/peer"
)
type NameAPI CoreAPI
// Publish announces new IPNS name and returns the new IPNS entry.
func (api *NameAPI) Publish(ctx context.Context, p path.Path, opts ...caopts.NamePublishOption) (ipns.Name, error) {
ctx, span := tracing.Span(ctx, "CoreAPI.NameAPI", "Publish", trace.WithAttributes(attribute.String("path", p.String())))
defer span.End()
if err := api.checkPublishAllowed(); err != nil {
return ipns.Name{}, err
}
options, err := caopts.NamePublishOptions(opts...)
if err != nil {
return ipns.Name{}, err
}
span.SetAttributes(
attribute.Bool("allowoffline", options.AllowOffline),
attribute.String("key", options.Key),
attribute.Float64("validtime", options.ValidTime.Seconds()),
)
if options.TTL != nil {
span.SetAttributes(attribute.Float64("ttl", options.TTL.Seconds()))
}
err = api.checkOnline(options.AllowOffline)
if err != nil {
return ipns.Name{}, err
}
k, err := keylookup(api.privateKey, api.repo.Keystore(), options.Key)
if err != nil {
return ipns.Name{}, err
}
eol := time.Now().Add(options.ValidTime)
publishOptions := []namesys.PublishOption{
namesys.PublishWithEOL(eol),
namesys.PublishWithIPNSOption(ipns.WithV1Compatibility(options.CompatibleWithV1)),
}
if options.TTL != nil {
publishOptions = append(publishOptions, namesys.PublishWithTTL(*options.TTL))
}
err = api.namesys.Publish(ctx, k, p, publishOptions...)
if err != nil {
return ipns.Name{}, err
}
pid, err := peer.IDFromPrivateKey(k)
if err != nil {
return ipns.Name{}, err
}
return ipns.NameFromPeer(pid), nil
}
func (api *NameAPI) Search(ctx context.Context, name string, opts ...caopts.NameResolveOption) (<-chan coreiface.IpnsResult, error) {
ctx, span := tracing.Span(ctx, "CoreAPI.NameAPI", "Search", trace.WithAttributes(attribute.String("name", name)))
defer span.End()
options, err := caopts.NameResolveOptions(opts...)
if err != nil {
return nil, err
}
span.SetAttributes(attribute.Bool("cache", options.Cache))
err = api.checkOnline(true)
if err != nil {
return nil, err
}
var resolver namesys.Resolver = api.namesys
if !options.Cache {
resolver, err = namesys.NewNameSystem(api.routing,
namesys.WithDatastore(api.repo.Datastore()),
namesys.WithDNSResolver(api.dnsResolver))
if err != nil {
return nil, err
}
}
if !strings.HasPrefix(name, "/ipns/") {
name = "/ipns/" + name
}
p, err := path.NewPath(name)
if err != nil {
return nil, err
}
out := make(chan coreiface.IpnsResult)
go func() {
defer close(out)
for res := range resolver.ResolveAsync(ctx, p, options.ResolveOpts...) {
select {
case out <- coreiface.IpnsResult{Path: res.Path, Err: res.Err}:
case <-ctx.Done():
return
}
}
}()
return out, nil
}
// Resolve attempts to resolve the newest version of the specified name and
// returns its path.
func (api *NameAPI) Resolve(ctx context.Context, name string, opts ...caopts.NameResolveOption) (path.Path, error) {
ctx, span := tracing.Span(ctx, "CoreAPI.NameAPI", "Resolve", trace.WithAttributes(attribute.String("name", name)))
defer span.End()
ctx, cancel := context.WithCancel(ctx)
defer cancel()
results, err := api.Search(ctx, name, opts...)
if err != nil {
return nil, err
}
err = coreiface.ErrResolveFailed
var p path.Path
for res := range results {
p, err = res.Path, res.Err
if err != nil {
break
}
}
return p, err
}
func keylookup(self ci.PrivKey, kstore keystore.Keystore, k string) (ci.PrivKey, error) {
////////////////////
// Lookup by name //
////////////////////
// First, lookup self.
if k == "self" {
return self, nil
}
// Then, look in the keystore.
res, err := kstore.Get(k)
if res != nil {
return res, nil
}
if err != nil && err != keystore.ErrNoSuchKey {
return nil, err
}
keys, err := kstore.List()
if err != nil {
return nil, err
}
//////////////////
// Lookup by ID //
//////////////////
targetPid, err := peer.Decode(k)
if err != nil {
return nil, keystore.ErrNoSuchKey
}
// First, check self.
pid, err := peer.IDFromPrivateKey(self)
if err != nil {
return nil, fmt.Errorf("failed to determine peer ID for private key: %w", err)
}
if pid == targetPid {
return self, nil
}
// Then, look in the keystore.
for _, key := range keys {
privKey, err := kstore.Get(key)
if err != nil {
return nil, err
}
pid, err := peer.IDFromPrivateKey(privKey)
if err != nil {
return nil, err
}
if targetPid == pid {
return privKey, nil
}
}
return nil, fmt.Errorf("no key by the given name or PeerID was found")
}