getChannelEventData method
Override to provide event-specific data for serialization
Implementation
@override
Map<String, dynamic> getChannelEventData() => {
'sequenceNumber': sequenceNumber,
'serverSignatureHex': serverSignatureHex,
'fullySignedPaymentTxHex': fullySignedPaymentTxHex,
'fullySignedPaymentTxId': fullySignedPaymentTxId,
};