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atproto/identity: add PublicKeyFor method (#611)
For labelers we need to specify which service public key we grab.
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-1
+16
-1
atproto/identity/identity.go
+16
-1
atproto/identity/identity.go
···
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if i.Keys == nil {
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return nil, fmt.Errorf("identity has no atproto public key attached")
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}
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k, ok := i.Keys["atproto"]
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return i.PublicKeyFor("atproto")
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}
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+
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// Identifies and parses a specified service signing public key, specifically, out of any keys associated with this identity.
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//
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// Returns [ErrKeyNotFound] if there is no such key.
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//
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// Note that [crypto.PublicKey] is an interface, not a concrete type.
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func (i *Identity) PublicKeyFor(forKey string) (crypto.PublicKey, error) {
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if i.ParsedPublicKey != nil {
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return i.ParsedPublicKey, nil
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}
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if i.Keys == nil {
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return nil, fmt.Errorf("identity has no atproto public key attached")
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}
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k, ok := i.Keys[forKey]
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if !ok {
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return nil, ErrKeyNotDeclared
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}