fix(delegation): redelete view.go

delegation/view.go

@@ -1,87 +0,0 @@
-package delegation
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/ipld/go-ipld-prime/datamodel"
-
-	"github.com/ucan-wg/go-ucan/capability/command"
-	"github.com/ucan-wg/go-ucan/capability/policy"
-	"github.com/ucan-wg/go-ucan/did"
-)
-
-type View 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 map[string]datamodel.Node
-	// "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
-}
-
-// ViewFromModel build a decoded view of the raw IPLD data.
-// This function also serves as validation.
-func ViewFromModel(m PayloadModel) (*View, error) {
-	var view View
-	var err error
-
-	view.Issuer, err = did.Parse(m.Iss)
-	if err != nil {
-		return nil, fmt.Errorf("parse iss: %w", err)
-	}
-
-	view.Audience, err = did.Parse(m.Aud)
-	if err != nil {
-		return nil, fmt.Errorf("parse audience: %w", err)
-	}
-
-	if m.Sub != nil {
-		view.Subject, err = did.Parse(*m.Sub)
-		if err != nil {
-			return nil, fmt.Errorf("parse subject: %w", err)
-		}
-	} else {
-		view.Subject = did.Undef
-	}
-
-	view.Command, err = command.Parse(m.Cmd)
-	if err != nil {
-		return nil, fmt.Errorf("parse command: %w", err)
-	}
-
-	view.Policy, err = policy.FromIPLD(m.Pol)
-	if err != nil {
-		return nil, fmt.Errorf("parse policy: %w", err)
-	}
-
-	if len(m.Nonce) == 0 {
-		return nil, fmt.Errorf("nonce is required")
-	}
-	view.Nonce = m.Nonce
-
-	// TODO: copy?
-	view.Meta = m.Meta.Values
-
-	if m.Nbf != nil {
-		view.NotBefore = time.Unix(*m.Nbf, 0)
-	}
-
-	if m.Exp != nil {
-		view.Expiration = time.Unix(*m.Exp, 0)
-	}
-
-	return &view, nil
-}