86 lines
1.8 KiB
Go
86 lines
1.8 KiB
Go
package delegation
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import (
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_ "embed"
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"fmt"
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"sync"
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"github.com/ipld/go-ipld-prime"
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"github.com/ipld/go-ipld-prime/datamodel"
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"github.com/ipld/go-ipld-prime/node/bindnode"
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"github.com/ipld/go-ipld-prime/schema"
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"github.com/ucan-wg/go-ucan/internal/envelope"
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"github.com/ucan-wg/go-ucan/pkg/meta"
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)
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// [Tag] is the string used as a key within the SigPayload that identifies
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// that the TokenPayload is a delegation.
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//
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// [Tag]: https://github.com/ucan-wg/delegation/tree/v1_ipld#type-tag
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const Tag = "ucan/dlg@1.0.0-rc.1"
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// TODO: update the above Tag URL once the delegation specification is merged.
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//go:embed delegation.ipldsch
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var schemaBytes []byte
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var (
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once sync.Once
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ts *schema.TypeSystem
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err error
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)
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func mustLoadSchema() *schema.TypeSystem {
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once.Do(func() {
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ts, err = ipld.LoadSchemaBytes(schemaBytes)
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})
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if err != nil {
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panic(fmt.Errorf("failed to load IPLD schema: %s", err))
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}
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return ts
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}
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func payloadType() schema.Type {
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return mustLoadSchema().TypeByName("Payload")
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}
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var _ envelope.Tokener = (*tokenPayloadModel)(nil)
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type tokenPayloadModel struct {
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// Issuer DID (sender)
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Iss string
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// Audience DID (receiver)
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Aud string
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// Principal that the chain is about (the Subject)
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// optional: can be nil
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Sub *string
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// The Command to eventually invoke
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Cmd string
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// The delegation policy
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Pol datamodel.Node
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// A unique, random nonce
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Nonce []byte
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// Arbitrary Metadata
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Meta meta.Meta
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// "Not before" UTC Unix Timestamp in seconds (valid from), 53-bits integer
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// optional: can be nil
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Nbf *int64
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// The timestamp at which the Invocation becomes invalid
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// optional: can be nil
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Exp *int64
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}
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func (e *tokenPayloadModel) Prototype() schema.TypedPrototype {
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return bindnode.Prototype((*tokenPayloadModel)(nil), payloadType())
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}
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func (*tokenPayloadModel) Tag() string {
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return Tag
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}
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