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feat(ipns): refactored IPNS package with lean records
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hacdias committed Jun 12, 2023
1 parent 6f82d77 commit 11f817f
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Showing 29 changed files with 1,353 additions and 1,407 deletions.
5 changes: 5 additions & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,11 @@ The following emojis are used to highlight certain changes:

### Changed

* 🛠 The `ipns` package has been refactored. You should no longer use the direct Protobuf
version of the IPNS Record. Instead, we have a shiny new `ipns.Record` type that wraps
all the required functionality to work the best as possible with IPNS v2 Records. Please
check the [documentation](https://pkg.go.dev/github.com/ipfs/boxo/ipns) for more information.

### Removed

### Fixed
Expand Down
20 changes: 14 additions & 6 deletions coreiface/options/name.go
Original file line number Diff line number Diff line change
Expand Up @@ -11,12 +11,11 @@ const (
)

type NamePublishSettings struct {
ValidTime time.Duration
Key string

TTL *time.Duration

AllowOffline bool
ValidTime time.Duration
Key string
TTL *time.Duration
CompatibleWithV1 bool
AllowOffline bool
}

type NameResolveSettings struct {
Expand Down Expand Up @@ -104,6 +103,15 @@ func (nameOpts) TTL(ttl time.Duration) NamePublishOption {
}
}

// CompatibleWithV1 is an option for [Name.Publish] which specifies if the
// created record should be backwards compatible with V1 IPNS Records.
func (nameOpts) CompatibleWithV1(compatible bool) NamePublishOption {
return func(settings *NamePublishSettings) error {
settings.CompatibleWithV1 = compatible
return nil
}
}

// Cache is an option for Name.Resolve which specifies if cache should be used.
// Default value is true
func (nameOpts) Cache(cache bool) NameResolveOption {
Expand Down
12 changes: 10 additions & 2 deletions coreiface/options/namesys/opts.go
Original file line number Diff line number Diff line change
Expand Up @@ -84,8 +84,9 @@ func ProcessOpts(opts []ResolveOpt) ResolveOpts {

// PublishOptions specifies options for publishing an IPNS record.
type PublishOptions struct {
EOL time.Time
TTL time.Duration
EOL time.Time
TTL time.Duration
CompatibleWithV1 bool
}

// DefaultPublishOptions returns the default options for publishing an IPNS record.
Expand Down Expand Up @@ -113,6 +114,13 @@ func PublishWithTTL(ttl time.Duration) PublishOption {
}
}

// PublishCompatibleWithV1 sets compatibility with IPNS Records V1.
func PublishCompatibleWithV1(compatible bool) PublishOption {
return func(o *PublishOptions) {
o.CompatibleWithV1 = compatible
}
}

// ProcessPublishOptions converts an array of PublishOpt into a PublishOpts object.
func ProcessPublishOptions(opts []PublishOption) PublishOptions {
rsopts := DefaultPublishOptions()
Expand Down
7 changes: 2 additions & 5 deletions examples/gateway/proxy/routing.go
Original file line number Diff line number Diff line change
Expand Up @@ -7,9 +7,7 @@ import (
"net/http"
"strings"

"github.com/gogo/protobuf/proto"
"github.com/ipfs/boxo/ipns"
ipns_pb "github.com/ipfs/boxo/ipns/pb"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/libp2p/go-libp2p/core/routing"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
Expand Down Expand Up @@ -104,13 +102,12 @@ func (ps *proxyRouting) fetch(ctx context.Context, id peer.ID) ([]byte, error) {
return nil, err
}

var entry ipns_pb.IpnsEntry
err = proto.Unmarshal(rb, &entry)
rec, err := ipns.UnmarshalRecord(rb)
if err != nil {
return nil, err
}

err = ipns.ValidateWithPeerID(id, &entry)
err = ipns.ValidateWithPeerID(rec, id)
if err != nil {
return nil, err
}
Expand Down
8 changes: 4 additions & 4 deletions examples/go.mod
Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,7 @@ module github.com/ipfs/boxo/examples
go 1.19

require (
github.com/gogo/protobuf v1.3.2
github.com/ipfs/boxo v0.7.1-0.20230323075409-f4a8dd6614df
github.com/ipfs/boxo v0.8.0
github.com/ipfs/go-block-format v0.1.2
github.com/ipfs/go-cid v0.4.0
github.com/ipfs/go-datastore v0.6.0
Expand Down Expand Up @@ -45,6 +44,7 @@ require (
github.com/go-logr/stdr v1.2.2 // indirect
github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
github.com/godbus/dbus/v5 v5.1.0 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang/mock v1.6.0 // indirect
github.com/golang/protobuf v1.5.2 // indirect
github.com/google/gopacket v1.1.19 // indirect
Expand All @@ -64,7 +64,6 @@ require (
github.com/ipfs/go-ipld-cbor v0.0.6 // indirect
github.com/ipfs/go-ipld-format v0.5.0 // indirect
github.com/ipfs/go-ipld-legacy v0.2.1 // indirect
github.com/ipfs/go-ipns v0.3.0 // indirect
github.com/ipfs/go-log v1.0.5 // indirect
github.com/ipfs/go-log/v2 v2.5.1 // indirect
github.com/ipfs/go-metrics-interface v0.0.1 // indirect
Expand All @@ -82,7 +81,7 @@ require (
github.com/libp2p/go-doh-resolver v0.4.0 // indirect
github.com/libp2p/go-flow-metrics v0.1.0 // indirect
github.com/libp2p/go-libp2p-asn-util v0.2.0 // indirect
github.com/libp2p/go-libp2p-kad-dht v0.21.1 // indirect
github.com/libp2p/go-libp2p-kad-dht v0.23.0 // indirect
github.com/libp2p/go-libp2p-kbucket v0.5.0 // indirect
github.com/libp2p/go-libp2p-record v0.2.0 // indirect
github.com/libp2p/go-msgio v0.3.0 // indirect
Expand Down Expand Up @@ -160,6 +159,7 @@ require (
golang.org/x/text v0.7.0 // indirect
golang.org/x/tools v0.3.0 // indirect
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
gonum.org/v1/gonum v0.11.0 // indirect
google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
google.golang.org/grpc v1.53.0 // indirect
google.golang.org/protobuf v1.28.1 // indirect
Expand Down
8 changes: 4 additions & 4 deletions examples/go.sum
Original file line number Diff line number Diff line change
Expand Up @@ -312,8 +312,6 @@ github.com/ipfs/go-ipld-format v0.5.0 h1:WyEle9K96MSrvr47zZHKKcDxJ/vlpET6PSiQsAF
github.com/ipfs/go-ipld-format v0.5.0/go.mod h1:ImdZqJQaEouMjCvqCe0ORUS+uoBmf7Hf+EO/jh+nk3M=
github.com/ipfs/go-ipld-legacy v0.2.1 h1:mDFtrBpmU7b//LzLSypVrXsD8QxkEWxu5qVxN99/+tk=
github.com/ipfs/go-ipld-legacy v0.2.1/go.mod h1:782MOUghNzMO2DER0FlBR94mllfdCJCkTtDtPM51otM=
github.com/ipfs/go-ipns v0.3.0 h1:ai791nTgVo+zTuq2bLvEGmWP1M0A6kGTXUsgv/Yq67A=
github.com/ipfs/go-ipns v0.3.0/go.mod h1:3cLT2rbvgPZGkHJoPO1YMJeh6LtkxopCkKFcio/wE24=
github.com/ipfs/go-log v1.0.5 h1:2dOuUCB1Z7uoczMWgAyDck5JLb72zHzrMnGnCNNbvY8=
github.com/ipfs/go-log v1.0.5/go.mod h1:j0b8ZoR+7+R99LD9jZ6+AJsrzkPbSXbZfGakb5JPtIo=
github.com/ipfs/go-log/v2 v2.1.3/go.mod h1:/8d0SH3Su5Ooc31QlL1WysJhvyOTDCjcCZ9Axpmri6g=
Expand Down Expand Up @@ -393,8 +391,8 @@ github.com/libp2p/go-libp2p v0.26.3 h1:6g/psubqwdaBqNNoidbRKSTBEYgaOuKBhHl8Q5tO+
github.com/libp2p/go-libp2p v0.26.3/go.mod h1:x75BN32YbwuY0Awm2Uix4d4KOz+/4piInkp4Wr3yOo8=
github.com/libp2p/go-libp2p-asn-util v0.2.0 h1:rg3+Os8jbnO5DxkC7K/Utdi+DkY3q/d1/1q+8WeNAsw=
github.com/libp2p/go-libp2p-asn-util v0.2.0/go.mod h1:WoaWxbHKBymSN41hWSq/lGKJEca7TNm58+gGJi2WsLI=
github.com/libp2p/go-libp2p-kad-dht v0.21.1 h1:xpfp8/t9+X2ip1l8Umap1/UGNnJ3RHJgKGAEsnRAlTo=
github.com/libp2p/go-libp2p-kad-dht v0.21.1/go.mod h1:Oy8wvbdjpB70eS5AaFaI68tOtrdo3KylTvXDjikxqFo=
github.com/libp2p/go-libp2p-kad-dht v0.23.0 h1:sxE6LxLopp79eLeV695n7+c77V/Vn4AMF28AdM/XFqM=
github.com/libp2p/go-libp2p-kad-dht v0.23.0/go.mod h1:oO5N308VT2msnQI6qi5M61wzPmJYg7Tr9e16m5n7uDU=
github.com/libp2p/go-libp2p-kbucket v0.5.0 h1:g/7tVm8ACHDxH29BGrpsQlnNeu+6OF1A9bno/4/U1oA=
github.com/libp2p/go-libp2p-kbucket v0.5.0/go.mod h1:zGzGCpQd78b5BNTDGHNDLaTt9aDK/A02xeZp9QeFC4U=
github.com/libp2p/go-libp2p-record v0.2.0 h1:oiNUOCWno2BFuxt3my4i1frNrt7PerzB3queqa1NkQ0=
Expand Down Expand Up @@ -963,6 +961,8 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 h1:H2TDz8ibqkAF6YGhCdN3jS9O0/s90v0rJh3X/OLHEUk=
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2/go.mod h1:K8+ghG5WaK9qNqU5K3HdILfMLy1f3aNYFI/wnl100a8=
gonum.org/v1/gonum v0.11.0 h1:f1IJhK4Km5tBJmaiJXtk/PkL4cdVX6J+tGiM187uT5E=
gonum.org/v1/gonum v0.11.0/go.mod h1:fSG4YDCxxUZQJ7rKsQrj0gMOg00Il0Z96/qMA4bVQhA=
google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
google.golang.org/api v0.0.0-20181030000543-1d582fd0359e/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
google.golang.org/api v0.1.0/go.mod h1:UGEZY7KEX120AnNLIHFMKIo4obdJhkp2tPbaPlQx13Y=
Expand Down
7 changes: 3 additions & 4 deletions gateway/handler_ipns_record.go
Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ func (i *handler) serveIpnsRecord(ctx context.Context, w http.ResponseWriter, r
return false
}

record, err := ipns.UnmarshalIpnsEntry(rawRecord)
record, err := ipns.UnmarshalRecord(rawRecord)
if err != nil {
i.webError(w, r, err, http.StatusInternalServerError)
return false
Expand All @@ -69,9 +69,8 @@ func (i *handler) serveIpnsRecord(ctx context.Context, w http.ResponseWriter, r
return false
}

if record.Ttl != nil {
seconds := int(time.Duration(*record.Ttl).Seconds())
w.Header().Set("Cache-Control", fmt.Sprintf("public, max-age=%d", seconds))
if ttl, err := record.TTL(); err == nil {
w.Header().Set("Cache-Control", fmt.Sprintf("public, max-age=%d", int(ttl.Seconds())))
} else {
w.Header().Set("Last-Modified", time.Now().UTC().Format(http.TimeFormat))
}
Expand Down
4 changes: 2 additions & 2 deletions go.mod
Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ require (
github.com/libp2p/go-buffer-pool v0.1.0
github.com/libp2p/go-doh-resolver v0.4.0
github.com/libp2p/go-libp2p v0.26.3
github.com/libp2p/go-libp2p-kad-dht v0.21.1
github.com/libp2p/go-libp2p-kad-dht v0.23.0
github.com/libp2p/go-libp2p-record v0.2.0
github.com/libp2p/go-libp2p-routing-helpers v0.7.0
github.com/libp2p/go-libp2p-testing v0.12.0
Expand Down Expand Up @@ -112,7 +112,6 @@ require (
github.com/ipfs/go-ipfs-ds-help v1.1.0 // indirect
github.com/ipfs/go-ipfs-pq v0.0.3 // indirect
github.com/ipfs/go-ipfs-util v0.0.2 // indirect
github.com/ipfs/go-ipns v0.3.0 // indirect
github.com/ipfs/go-log v1.0.5 // indirect
github.com/ipfs/go-unixfs v0.4.5 // indirect
github.com/ipld/go-car/v2 v2.9.1-0.20230325062757-fff0e4397a3d // indirect
Expand Down Expand Up @@ -167,6 +166,7 @@ require (
golang.org/x/text v0.7.0 // indirect
golang.org/x/tools v0.3.0 // indirect
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
gonum.org/v1/gonum v0.11.0 // indirect
google.golang.org/appengine v1.6.7 // indirect
google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
google.golang.org/grpc v1.53.0 // indirect
Expand Down
8 changes: 4 additions & 4 deletions go.sum
Original file line number Diff line number Diff line change
Expand Up @@ -325,8 +325,6 @@ github.com/ipfs/go-ipld-format v0.5.0 h1:WyEle9K96MSrvr47zZHKKcDxJ/vlpET6PSiQsAF
github.com/ipfs/go-ipld-format v0.5.0/go.mod h1:ImdZqJQaEouMjCvqCe0ORUS+uoBmf7Hf+EO/jh+nk3M=
github.com/ipfs/go-ipld-legacy v0.2.1 h1:mDFtrBpmU7b//LzLSypVrXsD8QxkEWxu5qVxN99/+tk=
github.com/ipfs/go-ipld-legacy v0.2.1/go.mod h1:782MOUghNzMO2DER0FlBR94mllfdCJCkTtDtPM51otM=
github.com/ipfs/go-ipns v0.3.0 h1:ai791nTgVo+zTuq2bLvEGmWP1M0A6kGTXUsgv/Yq67A=
github.com/ipfs/go-ipns v0.3.0/go.mod h1:3cLT2rbvgPZGkHJoPO1YMJeh6LtkxopCkKFcio/wE24=
github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
github.com/ipfs/go-log v1.0.5 h1:2dOuUCB1Z7uoczMWgAyDck5JLb72zHzrMnGnCNNbvY8=
github.com/ipfs/go-log v1.0.5/go.mod h1:j0b8ZoR+7+R99LD9jZ6+AJsrzkPbSXbZfGakb5JPtIo=
Expand Down Expand Up @@ -413,8 +411,8 @@ github.com/libp2p/go-libp2p v0.26.3 h1:6g/psubqwdaBqNNoidbRKSTBEYgaOuKBhHl8Q5tO+
github.com/libp2p/go-libp2p v0.26.3/go.mod h1:x75BN32YbwuY0Awm2Uix4d4KOz+/4piInkp4Wr3yOo8=
github.com/libp2p/go-libp2p-asn-util v0.2.0 h1:rg3+Os8jbnO5DxkC7K/Utdi+DkY3q/d1/1q+8WeNAsw=
github.com/libp2p/go-libp2p-asn-util v0.2.0/go.mod h1:WoaWxbHKBymSN41hWSq/lGKJEca7TNm58+gGJi2WsLI=
github.com/libp2p/go-libp2p-kad-dht v0.21.1 h1:xpfp8/t9+X2ip1l8Umap1/UGNnJ3RHJgKGAEsnRAlTo=
github.com/libp2p/go-libp2p-kad-dht v0.21.1/go.mod h1:Oy8wvbdjpB70eS5AaFaI68tOtrdo3KylTvXDjikxqFo=
github.com/libp2p/go-libp2p-kad-dht v0.23.0 h1:sxE6LxLopp79eLeV695n7+c77V/Vn4AMF28AdM/XFqM=
github.com/libp2p/go-libp2p-kad-dht v0.23.0/go.mod h1:oO5N308VT2msnQI6qi5M61wzPmJYg7Tr9e16m5n7uDU=
github.com/libp2p/go-libp2p-kbucket v0.5.0 h1:g/7tVm8ACHDxH29BGrpsQlnNeu+6OF1A9bno/4/U1oA=
github.com/libp2p/go-libp2p-kbucket v0.5.0/go.mod h1:zGzGCpQd78b5BNTDGHNDLaTt9aDK/A02xeZp9QeFC4U=
github.com/libp2p/go-libp2p-record v0.2.0 h1:oiNUOCWno2BFuxt3my4i1frNrt7PerzB3queqa1NkQ0=
Expand Down Expand Up @@ -982,6 +980,8 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 h1:H2TDz8ibqkAF6YGhCdN3jS9O0/s90v0rJh3X/OLHEUk=
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2/go.mod h1:K8+ghG5WaK9qNqU5K3HdILfMLy1f3aNYFI/wnl100a8=
gonum.org/v1/gonum v0.11.0 h1:f1IJhK4Km5tBJmaiJXtk/PkL4cdVX6J+tGiM187uT5E=
gonum.org/v1/gonum v0.11.0/go.mod h1:fSG4YDCxxUZQJ7rKsQrj0gMOg00Il0Z96/qMA4bVQhA=
google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
google.golang.org/api v0.0.0-20181030000543-1d582fd0359e/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
google.golang.org/api v0.1.0/go.mod h1:UGEZY7KEX120AnNLIHFMKIo4obdJhkp2tPbaPlQx13Y=
Expand Down
57 changes: 37 additions & 20 deletions ipns/README.md
Original file line number Diff line number Diff line change
@@ -1,31 +1,48 @@
## Usage
# IPNS

To create a new IPNS record:
> A reference implementation of the IPNS Record and Verification specification.
## Documentation

- Go Documentation: https://pkg.go.dev/github.com/ipfs/boxo/ipns
- IPNS Record Specification: https://specs.ipfs.tech/ipns/ipns-record/

## Example

Here's an example on how to create an IPNS Record:

```go
import (
"crypto/rand"
"time"

ipns "github.com/ipfs/boxo/ipns"
crypto "github.com/libp2p/go-libp2p/core/crypto"
"github.com/ipfs/boxo/ipns"
"github.com/ipfs/boxo/path"
ic "github.com/libp2p/go-libp2p/core/crypto"
)

// Generate a private key to sign the IPNS record with. Most of the time,
// however, you'll want to retrieve an already-existing key from IPFS using the
// go-ipfs/core/coreapi CoreAPI.KeyAPI() interface.
privateKey, publicKey, err := crypto.GenerateKeyPair(crypto.RSA, 2048)
if err != nil {
panic(err)
}
func main() {
// Create a private key to sign your IPNS record. Most of the time, you
// will want to retrieve an already-existing key from Kubo, for example.
sk, _, err := ic.GenerateEd25519Key(rand.Reader)
if err != nil {
panic(err)
}

// Create an IPNS record that expires in one hour and points to the IPFS address
// /ipfs/Qme1knMqwt1hKZbc1BmQFmnm9f36nyQGwXxPGVpVJ9rMK5
ipnsRecord, err := ipns.Create(privateKey, []byte("/ipfs/Qme1knMqwt1hKZbc1BmQFmnm9f36nyQGwXxPGVpVJ9rMK5"), 0, time.Now().Add(1*time.Hour))
if err != nil {
panic(err)
}
```
// Define the path this record will point to.
path := path.FromString("/ipfs/bafkqac3jobxhgidsn5rww4yk")

// Until when the record is valid.
eol := time.Now().Add(time.Hour)

// For how long should caches cache the record.
ttl := time.Second * 20

Once you have the record, you’ll need to use IPFS to *publish* it.
record, err := ipns.NewRecord(sk, path, 1, eol, ttl)
if err != nil {
panic(err)
}

There are several other major operations you can do with `go-ipns`. Check out the [API docs](https://pkg.go.dev/github.com/ipfs/boxo/ipns) or look at the tests in this repo for examples.
// Now you have an IPNS Record.
}
```
48 changes: 26 additions & 22 deletions ipns/errors.go
Original file line number Diff line number Diff line change
Expand Up @@ -4,41 +4,45 @@ import (
"errors"
)

// ErrExpiredRecord should be returned when an ipns record is
// invalid due to being too old
// ErrExpiredRecord is returned when an IPNS Record is invalid due to being expired.
var ErrExpiredRecord = errors.New("expired record")

// ErrUnrecognizedValidity is returned when an IpnsRecord has an
// unknown validity type.
// ErrUnrecognizedValidity is returned when an IPNS Record has an unknown validity type.
var ErrUnrecognizedValidity = errors.New("unrecognized validity type")

// ErrInvalidPath should be returned when an ipns record path
// is not in a valid format
// ErrInvalidValidity is returned when an IPNS Record has a known validity type,
// but the validity value is invalid.
var ErrInvalidValidity = errors.New("invalid validity")

// ErrInvalidPath is returned when an IPNS Record has an invalid path.
var ErrInvalidPath = errors.New("record path invalid")

// ErrSignature should be returned when an ipns record fails
// signature verification
// ErrInvalidPublicKey is returned when an IPNS Record has an invalid public key,
var ErrInvalidPublicKey = errors.New("record public key invalid")

// ErrSignature is returned when an IPNS Record fails signature verification.
var ErrSignature = errors.New("record signature verification failed")

// ErrKeyFormat should be returned when an ipns record key is
// incorrectly formatted (not a peer ID)
// ErrKeyFormat is returned when an IPNS Record key is incorrectly formatted.
var ErrKeyFormat = errors.New("record key could not be parsed into peer ID")

// ErrPublicKeyNotFound should be returned when the public key
// corresponding to the ipns record path cannot be retrieved
// from the peer store
var ErrPublicKeyNotFound = errors.New("public key not found in peer store")
// ErrPublicKeyNotFound is returned when the public key is not found.
var ErrPublicKeyNotFound = errors.New("public key not found")

// ErrPublicKeyMismatch should be returned when the public key embedded in the
// record doesn't match the expected public key.
var ErrPublicKeyMismatch = errors.New("public key in record did not match expected pubkey")
// ErrPublicKeyMismatch is returned when the public key embedded in the IPNS
// Record doesn't match the expected public key.
var ErrPublicKeyMismatch = errors.New("public key in record did not match expected public key")

// ErrBadRecord should be returned when an ipns record cannot be unmarshalled
// ErrBadRecord is returned when an IPNS Record cannot be unmarshalled.
var ErrBadRecord = errors.New("record could not be unmarshalled")

// 10 KiB limit defined in https://github.com/ipfs/specs/pull/319
const MaxRecordSize int = 10 << (10 * 1)
// ErrDataMissing is returned when the record is missing the data field.
var ErrDataMissing = errors.New("data field is missing from record")

// ErrRecordSize should be returned when an ipns record is
// invalid due to being too big
// ErrRecordSize is returned when an IPNS Record is too long.
var ErrRecordSize = errors.New("record exceeds allowed size limit")

// MaxRecordSize is the IPNS Record [size limit].
//
// [size limit]: https://specs.ipfs.tech/ipns/ipns-record/#record-size-limit
const MaxRecordSize int = 10 << (10 * 1)
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