toJson method
Convert the ExchangeInjectContract object to a JSON representation.
Implementation
@override
Map<String, dynamic> toJson() {
return {
'owner_address': ownerAddress.toString(),
'exchange_id': exchangeId?.toString(),
'token_id': BytesUtils.tryToHexString(tokenId),
'quant': quant?.toString(),
}..removeWhere((key, value) => value == null);
}