- Reject request when not enough fund is available to convert.
- MIN_FUND is the minimum fund that should be reserved.
- Add funds for conversion via adminID
- Added: Refund feature
- Automate a refund on currency when convertToCoin request is made when fund is insufficient
- ConvertFrom now accepts an non-broadcasted tx_hex from user and broadcast it when convert fund is available. (if convert fund is insufficient, then tx is not broadcasted)