toJson method
Convert the ExchangeTransactionContract 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(),
"expected": expected?.toString(),
}..removeWhere((key, value) => value == null);
}