38 lines
1003 B
Go
38 lines
1003 B
Go
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package feature
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import (
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"fmt"
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"github.com/lightningnetwork/lnd/lnwire"
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)
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// ErrUnknownRequired signals that a feature vector requires certain features
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// that our node is unaware of or does not implement.
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type ErrUnknownRequired struct {
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unknown []lnwire.FeatureBit
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}
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// NewErrUnknownRequired initializes an ErrUnknownRequired with the unknown
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// feature bits.
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func NewErrUnknownRequired(unknown []lnwire.FeatureBit) ErrUnknownRequired {
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return ErrUnknownRequired{
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unknown: unknown,
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}
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}
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// Error returns a human-readable description of the error.
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func (e ErrUnknownRequired) Error() string {
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return fmt.Sprintf("feature vector contains unknown required "+
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"features: %v", e.unknown)
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}
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// ValidateRequired returns an error if the feature vector contains a non-zero
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// number of unknown, required feature bits.
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func ValidateRequired(fv *lnwire.FeatureVector) error {
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unknown := fv.UnknownRequiredFeatures()
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if len(unknown) > 0 {
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return NewErrUnknownRequired(unknown)
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}
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return nil
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}
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