feat(invocation): produce example output similar to spec

token/invocation/examples_test.go

@@ -15,7 +15,6 @@ import (
 	"github.com/ipld/go-ipld-prime/fluent/qp"
 	"github.com/ipld/go-ipld-prime/node/basicnode"
 	"github.com/libp2p/go-libp2p/core/crypto"
-
 	"github.com/ucan-wg/go-ucan/did"
 	"github.com/ucan-wg/go-ucan/pkg/command"
 	"github.com/ucan-wg/go-ucan/token/invocation"

token/invocation/invocation.go

@@ -65,14 +65,20 @@ type Token struct {
 // the previous contents of their target field.
 func New(iss, sub did.DID, cmd command.Command, prf []cid.Cid, opts ...Option) (*Token, error) {
 	iat := time.Now()
+	metadata := meta.NewMeta()
 
 	tkn := Token{
 		issuer:    iss,
 		subject:   sub,
 		command:   cmd,
 		proof:     prf,
+<<<<<<< HEAD
 		meta:      meta.NewMeta(),
 		nonce:     nil,
+=======
+		meta:      metadata,
+		nonce:     nonce,
+>>>>>>> f44cf8a (feat(invocation): produce example output similar to spec)
 		invokedAt: &iat,
 	}
 
@@ -82,6 +88,7 @@ func New(iss, sub did.DID, cmd command.Command, prf []cid.Cid, opts ...Option) (
 		}
 	}
 
+<<<<<<< HEAD
 	if len(tkn.nonce) == 0 {
 		tkn.nonce, err = generateNonce()
 		if err != nil {
@@ -91,6 +98,10 @@ func New(iss, sub did.DID, cmd command.Command, prf []cid.Cid, opts ...Option) (
 
 	if err := tkn.validate(); err != nil {
 		return nil, err
+=======
+	if len(tkn.meta.Keys) == 0 {
+		tkn.meta = nil
+>>>>>>> f44cf8a (feat(invocation): produce example output similar to spec)
 	}
 
 	return &tkn, nil

token/invocation/options.go

@@ -130,6 +130,15 @@ func WithoutInvokedAt() Option {
 	}
 }
 
+// WithoutInvokedAt clears the Token's invokedAt field.
+func WithoutInvokedAt() Option {
+	return func(t *Token) error {
+		t.invokedAt = nil
+
+		return nil
+	}
+}
+
 // WithCause sets the Token's cause field to the provided cid.Cid.
 func WithCause(cause *cid.Cid) Option {
 	return func(t *Token) error {