INNER CODE UNIT · Go

realMac

lightningnetwork/lightning-onion · crypto.go:384

		realMac := h.Sum(nil)
		if hmac.Equal(realMac, expectedMac) && sender == 0 {
			sender = i + 1
			msg = data
		}
	}

	// If the sender index is still zero, then we haven't found the sender,
	// meaning we've failed to decrypt.
	if sender == 0 {
		return nil, errors.New("unable to retrieve onion failure")
	}

	return &DecryptedError{
		SenderIdx: sender,
		Sender:    o.circuit.PaymentPath[sender-1],
		Message:   msg,
	}, nil

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