fix(delegation): simplify package API and restore convenient encoding

delegation/delegatiom_options.go

@@ -1,19 +1,14 @@
 package delegation
 
-// Code generated by github.com/launchdarkly/go-options.  DO NOT EDIT.
+// Code generated by github.com/selesy/go-options.  DO NOT EDIT.
-
-import "fmt"
 
 import (
+	"github.com/ipld/go-ipld-prime/datamodel"
 	"github.com/ucan-wg/go-ucan/did"
 	"time"
 )
 
-type ApplyOptionFunc func(c *config) error
+type Option func(c *config) error
-
-func (f ApplyOptionFunc) apply(c *config) error {
-	return f(c)
-}
 
 func newConfig(options ...Option) (config, error) {
 	var c config
@@ -23,152 +18,52 @@ func newConfig(options ...Option) (config, error) {
 
 func applyConfigOptions(c *config, options ...Option) error {
 	for _, o := range options {
-		if err := o.apply(c); err != nil {
+		if err := o(c); err != nil {
 			return err
 		}
 	}
 	return nil
 }
 
-type Option interface {
-	apply(*config) error
-}
-
-type withExpirationImpl struct {
-	o *time.Time
-}
-
-func (o withExpirationImpl) apply(c *config) error {
-	c.Expiration = o.o
-	return nil
-}
-
-func (o withExpirationImpl) String() string {
-	name := "WithExpiration"
-
-	// hack to avoid go vet error about passing a function to Sprintf
-	var value interface{} = o.o
-	return fmt.Sprintf("%s: %+v", name, value)
-}
-
 func WithExpiration(o *time.Time) Option {
-	return withExpirationImpl{
+	return func(c *config) error {
-		o: o,
+		c.Expiration = o
+		return nil
 	}
 }
 
-type withMetaImpl struct {
+func WithMeta(o map[string]datamodel.Node) Option {
-	o map[string]any
+	return func(c *config) error {
-}
+		c.Meta = o
-
+		return nil
-func (o withMetaImpl) apply(c *config) error {
-	c.Meta = o.o
-	return nil
-}
-
-func (o withMetaImpl) String() string {
-	name := "WithMeta"
-
-	// hack to avoid go vet error about passing a function to Sprintf
-	var value interface{} = o.o
-	return fmt.Sprintf("%s: %+v", name, value)
-}
-
-func WithMeta(o map[string]any) Option {
-	return withMetaImpl{
-		o: o,
 	}
 }
 
-type withNoExpirationImpl struct {
-	o bool
-}
-
-func (o withNoExpirationImpl) apply(c *config) error {
-	c.NoExpiration = o.o
-	return nil
-}
-
-func (o withNoExpirationImpl) String() string {
-	name := "WithNoExpiration"
-
-	// hack to avoid go vet error about passing a function to Sprintf
-	var value interface{} = o.o
-	return fmt.Sprintf("%s: %+v", name, value)
-}
-
 func WithNoExpiration(o bool) Option {
-	return withNoExpirationImpl{
+	return func(c *config) error {
-		o: o,
+		c.NoExpiration = o
+		return nil
 	}
 }
 
-type withNotBeforeImpl struct {
-	o *time.Time
-}
-
-func (o withNotBeforeImpl) apply(c *config) error {
-	c.NotBefore = o.o
-	return nil
-}
-
-func (o withNotBeforeImpl) String() string {
-	name := "WithNotBefore"
-
-	// hack to avoid go vet error about passing a function to Sprintf
-	var value interface{} = o.o
-	return fmt.Sprintf("%s: %+v", name, value)
-}
-
 func WithNotBefore(o *time.Time) Option {
-	return withNotBeforeImpl{
+	return func(c *config) error {
-		o: o,
+		c.NotBefore = o
+		return nil
 	}
 }
 
-type withSubjectImpl struct {
-	o *did.DID
-}
-
-func (o withSubjectImpl) apply(c *config) error {
-	c.Subject = o.o
-	return nil
-}
-
-func (o withSubjectImpl) String() string {
-	name := "WithSubject"
-
-	// hack to avoid go vet error about passing a function to Sprintf
-	var value interface{} = o.o
-	return fmt.Sprintf("%s: %+v", name, value)
-}
-
 // WithSubject is a did.DID representing the Subject.
 func WithSubject(o *did.DID) Option {
-	return withSubjectImpl{
+	return func(c *config) error {
-		o: o,
+		c.Subject = o
+		return nil
 	}
 }
 
-type withPowerlineImpl struct {
-	o bool
-}
-
-func (o withPowerlineImpl) apply(c *config) error {
-	c.Powerline = o.o
-	return nil
-}
-
-func (o withPowerlineImpl) String() string {
-	name := "WithPowerline"
-
-	// hack to avoid go vet error about passing a function to Sprintf
-	var value interface{} = o.o
-	return fmt.Sprintf("%s: %+v", name, value)
-}
-
 func WithPowerline(o bool) Option {
-	return withPowerlineImpl{
+	return func(c *config) error {
-		o: o,
+		c.Powerline = o
+		return nil
 	}
 }

delegation/delegation.go

@@ -1,11 +1,12 @@
 package delegation
 
 import (
+	"errors"
+	"fmt"
 	"time"
 
 	"github.com/ipld/go-ipld-prime/datamodel"
-	"github.com/ipld/go-ipld-prime/node/bindnode"
+	"github.com/libp2p/go-libp2p/core/crypto"
-	"github.com/ipld/go-ipld-prime/schema"
 	"github.com/ucan-wg/go-ucan/capability/command"
 	"github.com/ucan-wg/go-ucan/capability/policy"
 	"github.com/ucan-wg/go-ucan/did"
@@ -14,15 +15,19 @@ import (
 )
 
 const (
-	Tag = "ucan/dlg@"
+	Tag = "ucan/dlg@1.0.0-rc.1"
 )
 
-//go:generate -command options go run github.com/launchdarkly/go-options
+type Delegation struct {
-//go:generate options -type=config -prefix=With -output=delegatiom_options.go -cmp=false -imports=time,github.com/ucan-wg/go-ucan/did
+	envel *envelope.Envelope
+}
+
+//go:generate -command options go run github.com/selesy/go-options
+//go:generate options -type=config -prefix=With -output=delegatiom_options.go -cmp=false -stringer=false -imports=time,github.com/ucan-wg/go-ucan/did,github.com/ipld/go-ipld-prime/datamodel
 
 type config struct {
 	Expiration   *time.Time
-	Meta         map[string]any
+	Meta         map[string]datamodel.Node
 	NoExpiration bool
 	NotBefore    *time.Time
 	// is a did.DID representing the Subject.
@@ -30,81 +35,105 @@ type config struct {
 	Powerline bool
 }
 
-type Meta struct {
+// Required fields for delegation
-	Keys   []string
-	Values map[string]datamodel.Node
-}
 
-func NewMeta(meta map[string]any) Meta {
+// Requirements for root
-	keys := make([]string, len(meta))
-	values := make(map[string]datamodel.Node, len(meta))
-	i := 0
 
-	for k, v := range meta {
+func New(privKey crypto.PrivKey, iss did.DID, aud did.DID, cmd *command.Command, pol *policy.Policy, exp *time.Time, nonce []byte, opts ...Option) (*Delegation, error) {
-		keys[i] = k
-		values[k] = bindnode.Wrap(&v, nil)
-	}
-
-	return Meta{
-		Keys:   keys,
-		Values: values,
-	}
-}
-
-var _ envelope.Tokener = (*Token)(nil)
-
-type Token struct {
-	// Issuer DID (sender)
-	Issuer did.DID
-	// Audience DID (receiver)
-	Audience did.DID
-	// Principal that the chain is about (the Subject)
-	Subject *did.DID
-	// The Command to eventually invoke
-	Command *command.Command
-	// The delegation policy
-	Policy *policy.Policy
-	// A unique, random nonce
-	Nonce []byte
-	// Arbitrary Metadata
-	Meta Meta
-	// "Not before" UTC Unix Timestamp in seconds (valid from), 53-bits integer
-	NotBefore *time.Time
-	// The timestamp at which the Invocation becomes invalid
-	Expiration *time.Time
-}
-
-func New(iss did.DID, aud did.DID, prf []Token, cmd *command.Command, pol *policy.Policy, exp *time.Time, nonce []byte, opts ...Option) (*Token, error) {
 	cfg, err := newConfig(opts...)
 	if err != nil {
 		return nil, err
 	}
 
-	tkn := &Token{
+	if !iss.Defined() {
-		Issuer:    iss,
+		return nil, fmt.Errorf("%w: %s", token.ErrMissingRequiredDID, "iss")
-		Audience:  aud,
-		Subject:   cfg.Subject,
-		Command:   cmd,
-		Policy:    pol,
-		Nonce:     nonce,
-		NotBefore: cfg.NotBefore,
 	}
 
+	if !aud.Defined() {
+		return nil, fmt.Errorf("%w: %s", token.ErrMissingRequiredDID, "aud")
+	}
+	audience := aud.String()
+
+	var subject *string
+	if cfg.Subject != nil && cfg.Subject.Defined() {
+		s := cfg.Subject.String()
+		subject = &s
+	}
+
+	policy, err := pol.ToIPLD()
+	if err != nil {
+		return nil, err
+	}
+
+	nonce = []uint8(nonce)
+
+	var notBefore *int
+	if cfg.NotBefore != nil {
+		n := int(cfg.NotBefore.Unix())
+		notBefore = &n
+	}
+
+	var meta *token.Map__String__Any
 	if len(cfg.Meta) > 0 {
-		tkn.Meta = NewMeta(cfg.Meta)
+		m := token.ToIPLDMapStringAny(cfg.Meta)
+		meta = &m
 	}
 
+	var expiration *int
 	if exp != nil && !cfg.NoExpiration {
-		tkn.Expiration = exp
+		e := int(cfg.NotBefore.Unix())
+		expiration = &e
 	}
 
-	return tkn, nil
+	tkn := &token.Token{
+		Issuer:     iss.String(),
+		Audience:   &audience,
+		Subject:    subject,
+		Command:    cmd.String(),
+		Policy:     &policy,
+		Nonce:      &nonce,
+		Meta:       meta,
+		NotBefore:  notBefore,
+		Expiration: expiration,
+	}
+
+	envel, err := envelope.New(privKey, tkn, Tag)
+	if err != nil {
+		return nil, err
+	}
+
+	dlg := &Delegation{envel: envel}
+
+	if err := dlg.Validate(); err != nil {
+		return nil, err
+	}
+
+	return dlg, nil
 }
 
-func (d *Token) Tag() string {
+type validateFunc func() error
-	return Tag
+
+func (d *Delegation) Validate() error {
+	return errors.Join(
+		d.validateDID("iss", &d.envel.TokenPayload().Issuer, false),
+		d.validateDID("aud", d.envel.TokenPayload().Audience, false),
+		d.validateDID("sub", d.envel.TokenPayload().Subject, true),
+	)
 }
 
-func (d *Token) Prototype() schema.TypedPrototype {
+func (d *Delegation) validateDID(fieldName string, identity *string, nullableOrOptional bool) error {
-	return bindnode.Prototype((*Token)(nil), mustLoadSchema().TypeByName("Delegation"), token.BindnodeOptions()...)
+	if identity == nil && !nullableOrOptional {
+		return fmt.Errorf("a required DID is missing: %s", fieldName)
+	}
+
+	id, err := did.Parse(*identity)
+	if err != nil {
+
+	}
+
+	if !id.Defined() && !id.Key() {
+		return fmt.Errorf("a required DID is missing: %s", fieldName)
+	}
+
+	return nil
 }

delegation/delegation.ipldsch

@@ -1,60 +0,0 @@
-type DID string
-
-# The Delegation payload MUST describe the authorization claims, who is involved, and its validity period.
-type Payload struct {
-    # Issuer DID (sender)
-    iss DID
-    # Audience DID (receiver)
-    aud DID
-    # Principal that the chain is about (the Subject)
-    sub optional DID
-
-    # The Command to eventually invoke
-    cmd String
-
-    # The delegation policy
-    # It doesn't seem possible to represent it with a schema.
-    pol Any
-
-    # A unique, random nonce
-    nonce Bytes
-
-    # Arbitrary Metadata
-    meta {String : Any}
-
-    # "Not before" UTC Unix Timestamp in seconds (valid from), 53-bits integer
-    nbf optional Int
-    # The timestamp at which the Invocation becomes invalid
-    exp nullable Int
-}
-
-type Delegation struct {
-    # Issuer DID (sender)
-    issuer DID (rename "iss")
-    # Audience DID (receiver)
-    audience DID (rename "aud")
-    # Principal that the chain is about (the Subject)
-    subject optional DID (rename "sub")
-
-    # The Command to eventually invoke
-    command String (rename "cmd")
-
-    # The delegation policy
-    # It doesn't seem possible to represent it with a schema.
-    policy Any (rename "pol")
-
-    # A unique, random nonce
-    nonce Bytes
-    
-    # Arbitrary Metadata
-    meta {String : Any}
-
-    # "Not before" UTC Unix Timestamp in seconds (valid from), 53-bits integer
-    notBefore optional Int (rename "nbf")
-    # The timestamp at which the Invocation becomes invalid
-    expiration nullable Int (rename "exp")
-}
-
-type Save struct {
-
-}

delegation/delegation_test.go

@@ -1,87 +0,0 @@
-package delegation_test
-
-import (
-	"testing"
-
-	"github.com/ipld/go-ipld-prime"
-	"github.com/ipld/go-ipld-prime/codec/dagjson"
-	"github.com/ipld/go-ipld-prime/node/bindnode"
-	"github.com/ipld/go-ipld-prime/schema"
-	"github.com/stretchr/testify/require"
-	"github.com/ucan-wg/go-ucan/delegation"
-	"github.com/ucan-wg/go-ucan/internal/token"
-)
-
-func TestToken_Proto(t *testing.T) {
-	t.Parallel()
-
-	const delegationJson = `
-{
-  "aud":"did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK",
-  "cmd":"/foo/bar",
-  "exp":123456,
-  "iss":"did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK",
-  "meta":{
-    "bar":"baaar",
-    "foo":"fooo"
-  },
-  "nbf":123456,
-  "nonce":{
-    "/":{
-      "bytes":"c3VwZXItcmFuZG9t"
-    }
-  },
-  "pol":[
-			["==", ".status", "draft"],
-			["all", ".reviewer", [
-			["like", ".email", "*@example.com"]]
-		],
-			["any", ".tags", [ 
-			["or", [
-				["==", ".", "news"], 
-				["==", ".", "press"]]
-				]]
-		]
-  ],
-  "sub":"did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK"
-}
-`
-
-	proto := (*delegation.Token)(nil).Prototype()
-
-	node, err := ipld.DecodeUsingPrototype([]byte(delegationJson), dagjson.Decode, proto)
-	require.NoError(t, err)
-
-	tkn, ok := bindnode.Unwrap(node).(*delegation.Token)
-	require.True(t, ok)
-
-	t.Log("Token:")
-	t.Log("  Audience:", tkn.Audience)
-	t.Log("  Command: ", tkn.Command)
-	// t.Log("  Expiration: ", token.Expiration)
-	t.Log("  Issuer:", tkn.Issuer)
-	// t.Log("  Meta:", token.Meta)
-	// t.Log("  NotBefore", token.NotBefore)
-	// t.Log("  Nonce:", token.Nonce)
-	// t.Log("  Policy:", token.Policy)
-	t.Log("  Subject:", tkn.Subject)
-
-	// token.Command = nil
-	// token.Meta = nil
-	// token.Policy = nil
-	// token.Expiration = nil
-	// token.NotBefore = nil
-
-	_ = bindnode.Wrap(tkn, proto.Type(), token.BindnodeOptions()...)
-
-	typed, ok := node.(schema.TypedNode)
-	require.True(t, ok)
-
-	json, err := ipld.Encode(typed.Representation(), dagjson.Encode)
-	require.NoError(t, err)
-
-	require.JSONEq(t, delegationJson, string(json))
-
-	t.Log(string(json))
-	t.Fail()
-}

delegation/encoding.go

@@ -0,0 +1,93 @@
+package delegation
+
+import (
+	"fmt"
+
+	"github.com/ipld/go-ipld-prime"
+	"github.com/ipld/go-ipld-prime/codec"
+	"github.com/ipld/go-ipld-prime/codec/dagcbor"
+	"github.com/ipld/go-ipld-prime/codec/dagjson"
+	"github.com/ipld/go-ipld-prime/datamodel"
+	"github.com/ucan-wg/go-ucan/internal/envelope"
+)
+
+// Encode marshals a Delegation to the the format specified by the provided
+// codec.Encoder.
+func (d *Delegation) Encode(encFn codec.Encoder) ([]byte, error) {
+	node, err := d.ToIPLD()
+	if err != nil {
+		return nil, err
+	}
+
+	return ipld.Encode(node, encFn)
+}
+
+// ToDagCbor marshals the Delegation to the DAG-CBOR format.
+func (d *Delegation) ToDagCbor() ([]byte, error) {
+	return d.Encode(dagcbor.Encode)
+}
+
+// ToDagJson marshals the Delegation to the DAG-JSON format.
+func (d *Delegation) ToDagJson() ([]byte, error) {
+	return d.Encode(dagjson.Encode)
+}
+
+// ToIPLD wraps the Delegation in an IPLD datamodel.Node.
+func (d *Delegation) ToIPLD() (datamodel.Node, error) {
+	return d.envel.Wrap()
+}
+
+// Decode unmarshals the input data using the format specified by the
+// provided codec.Decoder into a Delegation.
+//
+// An error is returned if the conversion fails, or if the resulting
+// Delegation is invalid.
+func Decode(b []byte, decFn codec.Decoder) (*Delegation, error) {
+	node, err := ipld.Decode(b, decFn)
+	if err != nil {
+		return nil, err
+	}
+
+	return FromIPLD(node)
+}
+
+// FromDagCbor unmarshals the input data into a Delegation.
+//
+// An error is returned if the conversion fails, or if the resulting
+// Delegation is invalid.
+func FromDagCbor(data []byte) (*Delegation, error) {
+	return Decode(data, dagcbor.Decode)
+}
+
+// FromDagsjon unmarshals the input data into a Delegation.
+//
+// An error is returned if the conversion fails, or if the resulting
+// Delegation is invalid.
+func FromDagJson(data []byte) (*Delegation, error) {
+	return Decode(data, dagjson.Decode)
+}
+
+// FromIPLD unwraps a Delegation from the provided IPLD datamodel.Node
+//
+// An error is returned if the conversion fails, or if the resulting
+// Delegation is invalid.
+func FromIPLD(node datamodel.Node) (*Delegation, error) {
+	envel, err := envelope.Unwrap(node)
+	if err != nil {
+		return nil, err
+	}
+
+	if envel.Tag() != Tag {
+		return nil, fmt.Errorf("wrong tag for TokenPayload: received %s but expected %s", envel.Tag(), Tag)
+	}
+
+	dlg := &Delegation{
+		envel: envel,
+	}
+
+	if err := dlg.Validate(); err != nil {
+		return nil, err
+	}
+
+	return dlg, nil
+}

delegation/encoding_test.go

@@ -0,0 +1,101 @@
+package delegation_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"github.com/ucan-wg/go-ucan/delegation"
+)
+
+func TestEncodingRoundTrip(t *testing.T) {
+	const delegationJson = `
+[
+  {
+    "/": {
+      "bytes": "QWr0Pk+sSWE1nszuBMQzggbHX4ofJb8QRdwrLJK/AGCx2p4s/xaCRieomfstDjsV4ezBzX1HARvcoNgdwDQ8Aw"
+    }
+  },
+  {
+    "h": {
+      "/": {
+        "bytes": "NO0BcQ"
+      }
+    },
+    "ucan/dlg@1.0.0-rc.1": {
+      "aud": "did:key:z6Mkpzn2n3ZGT2VaqMGSQC3tzmzV4TS9S71iFsDXE1WnoNH2",
+      "cmd": "/foo/bar",
+      "exp": -62135596800,
+      "iss": "did:key:z6Mkpzn2n3ZGT2VaqMGSQC3tzmzV4TS9S71iFsDXE1WnoNH2",
+      "meta": {
+        "bar": "barr",
+        "foo": "fooo"
+      },
+      "nbf": -62135596800,
+      "nonce": {
+        "/": {
+          "bytes": "X93ORvN1QIXrKPyEP5m5XoVK9VLX9nX8VV/+HlWrp9c"
+        }
+      },
+      "pol": [
+        [
+          "==",
+          ".status",
+          "draft"
+        ],
+        [
+          "all",
+          ".reviewer",
+          [
+            "like",
+            ".email",
+            "*@example.com"
+          ]
+        ],
+        [
+          "any",
+          ".tags",
+          [
+            "or",
+            [
+              [
+                "==",
+                ".",
+                "news"
+              ],
+              [
+                "==",
+                ".",
+                "press"
+              ]
+            ]
+          ]
+        ]
+      ],
+      "sub": "did:key:z6MktA1uBdCpq4uJBqE9jjMiLyxZBg9a6xgPPKJjMqss6Zc2"
+    }
+  }
+]
+`
+	// format:    dagJson   -->   Delegation   -->   dagCbor   -->   Delegation   -->   dagJson
+	// function:        FromDagJson()       ToDagCbor()    FromDagCbor()       ToDagJson()
+
+	p1, err := delegation.FromDagJson([]byte(delegationJson))
+	require.NoError(t, err)
+
+	cborBytes, err := p1.ToDagCbor()
+	require.NoError(t, err)
+	fmt.Println("cborBytes length", len(cborBytes))
+	fmt.Println("cbor", string(cborBytes))
+
+	p2, err := delegation.FromDagCbor(cborBytes)
+	require.NoError(t, err)
+	fmt.Println("read Cbor", p2)
+
+	readJson, err := p2.ToDagJson()
+	require.NoError(t, err)
+	fmt.Println("readJson length", len(readJson))
+	fmt.Println("json: ", string(readJson))
+
+	require.JSONEq(t, delegationJson, string(readJson))
+}

delegation/schema.go

@@ -1,33 +0,0 @@
-package delegation
-
-import (
-	_ "embed"
-	"fmt"
-	"sync"
-
-	"github.com/ipld/go-ipld-prime"
-	"github.com/ipld/go-ipld-prime/schema"
-)
-
-//go:embed delegation.ipldsch
-var schemaBytes []byte
-
-var (
-	once sync.Once
-	ts   *schema.TypeSystem
-	err  error
-)
-
-func mustLoadSchema() *schema.TypeSystem {
-	once.Do(func() {
-		ts, err = ipld.LoadSchemaBytes(schemaBytes)
-	})
-	if err != nil {
-		panic(fmt.Errorf("failed to load IPLD schema: %s", err))
-	}
-	return ts
-}
-
-func PayloadType() schema.Type {
-	return mustLoadSchema().TypeByName("Payload")
-}

delegation/schema_test.go

@@ -1,14 +0,0 @@
-package delegation
-
-import (
-	"testing"
-
-	"github.com/ipld/go-ipld-prime"
-)
-
-func BenchmarkSchemaLoad(b *testing.B) {
-	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
-		_, _ = ipld.LoadSchemaBytes(schemaBytes)
-	}
-}

internal/envelope/envelope.go

@@ -98,10 +98,16 @@ func Unwrap(node datamodel.Node) (*Envelope, error) {
 		return nil, err
 	}
 
-	return &Envelope{
+	envel := &Envelope{
 		signature:  signature,
 		sigPayload: sigPayload,
-	}, nil
+	}
+
+	if ok, err := envel.Verify(); !ok || err != nil {
+		return nil, fmt.Errorf("envelope was not signed by issuer")
+	}
+
+	return envel, nil
 }
 
 // Signature returns the cryptographic signature of the Envelope's

internal/envelope/testdata/example.dagjson

@@ -1 +1,20 @@
-[{"/":{"bytes":"PZV6A2aI7n+MlyADqcqmWhkuyNrgUCDz+qSLSnI9bpasOwOhKUTx95m5Nu5CO/INa1LqzHGioD9+PVf6qdtTBg"}},{"h":{"/":{"bytes":"NO0BcQ"}},"ucan/example@v1.0.0-rc.1":{"cmd":"","exp":null,"iss":"did:key:z6MkpuK2Amsu1RqcLGgmHHQHhvmeXCCBVsM4XFSg2cCyg4Nh","sub":null}}]
+[
+  {
+    "/": {
+      "bytes": "PZV6A2aI7n+MlyADqcqmWhkuyNrgUCDz+qSLSnI9bpasOwOhKUTx95m5Nu5CO/INa1LqzHGioD9+PVf6qdtTBg"
+    }
+  },
+  {
+    "h": {
+      "/": {
+        "bytes": "NO0BcQ"
+      }
+    },
+    "ucan/example@v1.0.0-rc.1": {
+      "cmd": "",
+      "exp": null,
+      "iss": "did:key:z6MkpuK2Amsu1RqcLGgmHHQHhvmeXCCBVsM4XFSg2cCyg4Nh",
+      "sub": null
+    }
+  }
+]