jschoubben
77e6e48ecd
The node-engine never reads the grants part's state: it asks the seat's verb withheld in its own name, and says withheld unknown when nothing answers. Builds: design 46 7 §6 (the composition reads them through the verb withheld; the node-engine's manifest gains mesh-grants in uses; "withheld unknown: the grants part does not answer"), lead answer A-239 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
48 lines
1.8 KiB
Go
48 lines
1.8 KiB
Go
package link
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import (
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"context"
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"encoding/json"
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)
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// **The composition names the withheld subjects** (design 46 approval mark §6, lead answer A-239): the node-engine reads them
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// through the seat mesh-grants' verb withheld, never from the grants part's state; when the verb does not answer, it says so.
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// GrantsSeat is the seat of the grants part, whose verb withheld names the marked subjects withheld from a node's runtime.
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const GrantsSeat = "mesh-grants"
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// WithheldUnknown is what a composition says when the grants part does not answer withheld (design 46 approval mark §6).
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const WithheldUnknown = "withheld unknown: the grants part does not answer"
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// WithheldSubject is one marked subject withheld from this node's runtime, and why.
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type WithheldSubject struct {
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Subject string `json:"subject"`
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Why string `json:"why"`
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}
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// WithheldOf is what the grants part withholds of module on this node, asked through its verb withheld: the subjects, or,
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// when the verb does not answer or answers what is not its answer, WithheldUnknown as unknown.
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func (q *Session) WithheldOf(ctx context.Context, module string) (subjects []WithheldSubject, unknown string) {
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raw, err := q.askCalled(ctx, GrantsSeat, "withheld", map[string]string{"node": q.Membership.Node}, VaultWithin,
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"the grants part's withheld")
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if err != nil {
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return nil, WithheldUnknown
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}
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var answer struct {
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Node string `json:"node"`
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Modules []struct {
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Module string `json:"module"`
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Subjects []WithheldSubject `json:"subjects"`
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} `json:"modules"`
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}
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if json.Unmarshal(raw, &answer) != nil || answer.Node != q.Membership.Node {
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return nil, WithheldUnknown
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}
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for _, m := range answer.Modules {
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if m.Module == module {
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subjects = append(subjects, m.Subjects...)
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}
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}
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return subjects, ""
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}
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