diff --git a/token/invocation/examples_test.go b/token/invocation/examples_test.go
index ce1743f..f948041 100644
--- a/token/invocation/examples_test.go
+++ b/token/invocation/examples_test.go
@@ -15,6 +15,7 @@ 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"
diff --git a/token/invocation/invocation.go b/token/invocation/invocation.go
index 0a44285..a1fdcb9 100644
--- a/token/invocation/invocation.go
+++ b/token/invocation/invocation.go
@@ -15,6 +15,7 @@ import (
 
 	"github.com/ipfs/go-cid"
 	"github.com/ipld/go-ipld-prime/datamodel"
+
 	"github.com/ucan-wg/go-ucan/did"
 	"github.com/ucan-wg/go-ucan/pkg/command"
 	"github.com/ucan-wg/go-ucan/pkg/meta"
@@ -229,29 +230,3 @@ func generateNonce() ([]byte, error) {
 	}
 	return res, nil
 }
-
-func parseOptionalCID(c *cid.Cid) (*cid.Cid, error) {
-	if c == nil {
-		return nil, nil
-	}
-
-	return c, nil
-}
-
-func parseOptionalDID(s *string) (did.DID, error) {
-	if s == nil {
-		return did.Undef, nil
-	}
-
-	return did.Parse(*s)
-}
-
-func parseOptionalTimestamp(sec *int64) (*time.Time, error) {
-	if sec == nil {
-		return nil, nil
-	}
-
-	t := time.Unix(*sec, 0)
-
-	return &t, nil
-}
diff --git a/token/invocation/options.go b/token/invocation/options.go
index f2f870a..1c557b9 100644
--- a/token/invocation/options.go
+++ b/token/invocation/options.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/ipfs/go-cid"
 	"github.com/ipld/go-ipld-prime/datamodel"
+
 	"github.com/ucan-wg/go-ucan/did"
 )
 
diff --git a/token/invocation/schema_test.go b/token/invocation/schema_test.go
index 92483ac..77b1afb 100644
--- a/token/invocation/schema_test.go
+++ b/token/invocation/schema_test.go
@@ -79,6 +79,7 @@ func TestSchemaRoundTrip(t *testing.T) {
 		assert.JSONEq(t, string(invocationJson), readJson.String())
 	})
 }
+
 func privKey(t require.TestingT, privKeyCfg string) crypto.PrivKey {
 	privKeyMar, err := crypto.ConfigDecodeKey(privKeyCfg)
 	require.NoError(t, err)